+++ /dev/null
-/* pnggccrd.c - mixed C/assembler version of utilities to read a PNG file
- *
- * For Intel x86 CPU (Pentium-MMX or later) and GNU C compiler.
- *
- * See http://www.intel.com/drg/pentiumII/appnotes/916/916.htm
- * and http://www.intel.com/drg/pentiumII/appnotes/923/923.htm
- * for Intel's performance analysis of the MMX vs. non-MMX code.
- *
- * libpng version 1.2.0 - September 1, 2001
- * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2001 Glenn Randers-Pehrson
- * Copyright (c) 1998, Intel Corporation
- *
- * Based on MSVC code contributed by Nirav Chhatrapati, Intel Corp., 1998.
- * Interface to libpng contributed by Gilles Vollant, 1999.
- * GNU C port by Greg Roelofs, 1999-2001.
- *
- * Lines 2350-4300 converted in place with intel2gas 1.3.1:
- *
- * intel2gas -mdI pnggccrd.c.partially-msvc -o pnggccrd.c
- *
- * and then cleaned up by hand. See http://hermes.terminal.at/intel2gas/ .
- *
- * NOTE: A sufficiently recent version of GNU as (or as.exe under DOS/Windows)
- * is required to assemble the newer MMX instructions such as movq.
- * For djgpp, see
- *
- * ftp://ftp.simtel.net/pub/simtelnet/gnu/djgpp/v2gnu/bnu281b.zip
- *
- * (or a later version in the same directory). For Linux, check your
- * distribution's web site(s) or try these links:
- *
- * http://rufus.w3.org/linux/RPM/binutils.html
- * http://www.debian.org/Packages/stable/devel/binutils.html
- * ftp://ftp.slackware.com/pub/linux/slackware/slackware/slakware/d1/
- * binutils.tgz
- *
- * For other platforms, see the main GNU site:
- *
- * ftp://ftp.gnu.org/pub/gnu/binutils/
- *
- * Version 2.5.2l.15 is definitely too old...
- */
-
-/*
- * TEMPORARY PORTING NOTES AND CHANGELOG (mostly by Greg Roelofs)
- * =====================================
- *
- * 19991006:
- * - fixed sign error in post-MMX cleanup code (16- & 32-bit cases)
- *
- * 19991007:
- * - additional optimizations (possible or definite):
- * x [DONE] write MMX code for 64-bit case (pixel_bytes == 8) [not tested]
- * - write MMX code for 48-bit case (pixel_bytes == 6)
- * - figure out what's up with 24-bit case (pixel_bytes == 3):
- * why subtract 8 from width_mmx in the pass 4/5 case?
- * (only width_mmx case) (near line 1606)
- * x [DONE] replace pixel_bytes within each block with the true
- * constant value (or are compilers smart enough to do that?)
- * - rewrite all MMX interlacing code so it's aligned with
- * the *beginning* of the row buffer, not the end. This
- * would not only allow one to eliminate half of the memory
- * writes for odd passes (that is, pass == odd), it may also
- * eliminate some unaligned-data-access exceptions (assuming
- * there's a penalty for not aligning 64-bit accesses on
- * 64-bit boundaries). The only catch is that the "leftover"
- * pixel(s) at the end of the row would have to be saved,
- * but there are enough unused MMX registers in every case,
- * so this is not a problem. A further benefit is that the
- * post-MMX cleanup code (C code) in at least some of the
- * cases could be done within the assembler block.
- * x [DONE] the "v3 v2 v1 v0 v7 v6 v5 v4" comments are confusing,
- * inconsistent, and don't match the MMX Programmer's Reference
- * Manual conventions anyway. They should be changed to
- * "b7 b6 b5 b4 b3 b2 b1 b0," where b0 indicates the byte that
- * was lowest in memory (e.g., corresponding to a left pixel)
- * and b7 is the byte that was highest (e.g., a right pixel).
- *
- * 19991016:
- * - Brennan's Guide notwithstanding, gcc under Linux does *not*
- * want globals prefixed by underscores when referencing them--
- * i.e., if the variable is const4, then refer to it as const4,
- * not _const4. This seems to be a djgpp-specific requirement.
- * Also, such variables apparently *must* be declared outside
- * of functions; neither static nor automatic variables work if
- * defined within the scope of a single function, but both
- * static and truly global (multi-module) variables work fine.
- *
- * 19991023:
- * - fixed png_combine_row() non-MMX replication bug (odd passes only?)
- * - switched from string-concatenation-with-macros to cleaner method of
- * renaming global variables for djgpp--i.e., always use prefixes in
- * inlined assembler code (== strings) and conditionally rename the
- * variables, not the other way around. Hence _const4, _mask8_0, etc.
- *
- * 19991024:
- * - fixed mmxsupport()/png_do_read_interlace() first-row bug
- * This one was severely weird: even though mmxsupport() doesn't touch
- * ebx (where "row" pointer was stored), it nevertheless managed to zero
- * the register (even in static/non-fPIC code--see below), which in turn
- * caused png_do_read_interlace() to return prematurely on the first row of
- * interlaced images (i.e., without expanding the interlaced pixels).
- * Inspection of the generated assembly code didn't turn up any clues,
- * although it did point at a minor optimization (i.e., get rid of
- * mmx_supported_local variable and just use eax). Possibly the CPUID
- * instruction is more destructive than it looks? (Not yet checked.)
- * - "info gcc" was next to useless, so compared fPIC and non-fPIC assembly
- * listings... Apparently register spillage has to do with ebx, since
- * it's used to index the global offset table. Commenting it out of the
- * input-reg lists in png_combine_row() eliminated compiler barfage, so
- * ifdef'd with __PIC__ macro: if defined, use a global for unmask
- *
- * 19991107:
- * - verified CPUID clobberage: 12-char string constant ("GenuineIntel",
- * "AuthenticAMD", etc.) placed in ebx:ecx:edx. Still need to polish.
- *
- * 19991120:
- * - made "diff" variable (now "_dif") global to simplify conversion of
- * filtering routines (running out of regs, sigh). "diff" is still used
- * in interlacing routines, however.
- * - fixed up both versions of mmxsupport() (ORIG_THAT_USED_TO_CLOBBER_EBX
- * macro determines which is used); original not yet tested.
- *
- * 20000213:
- * - when compiling with gcc, be sure to use -fomit-frame-pointer
- *
- * 20000319:
- * - fixed a register-name typo in png_do_read_interlace(), default (MMX) case,
- * pass == 4 or 5, that caused visible corruption of interlaced images
- *
- * 20000623:
- * - Various problems were reported with gcc 2.95.2 in the Cygwin environment,
- * many of the form "forbidden register 0 (ax) was spilled for class AREG."
- * This is explained at http://gcc.gnu.org/fom_serv/cache/23.html, and
- * Chuck Wilson supplied a patch involving dummy output registers. See
- * http://sourceforge.net/bugs/?func=detailbug&bug_id=108741&group_id=5624
- * for the original (anonymous) SourceForge bug report.
- *
- * 20000706:
- * - Chuck Wilson passed along these remaining gcc 2.95.2 errors:
- * pnggccrd.c: In function `png_combine_row':
- * pnggccrd.c:525: more than 10 operands in `asm'
- * pnggccrd.c:669: more than 10 operands in `asm'
- * pnggccrd.c:828: more than 10 operands in `asm'
- * pnggccrd.c:994: more than 10 operands in `asm'
- * pnggccrd.c:1177: more than 10 operands in `asm'
- * They are all the same problem and can be worked around by using the
- * global _unmask variable unconditionally, not just in the -fPIC case.
- * Reportedly earlier versions of gcc also have the problem with more than
- * 10 operands; they just don't report it. Much strangeness ensues, etc.
- *
- * 20000729:
- * - enabled png_read_filter_row_mmx_up() (shortest remaining unconverted
- * MMX routine); began converting png_read_filter_row_mmx_sub()
- * - to finish remaining sections:
- * - clean up indentation and comments
- * - preload local variables
- * - add output and input regs (order of former determines numerical
- * mapping of latter)
- * - avoid all usage of ebx (including bx, bh, bl) register [20000823]
- * - remove "$" from addressing of Shift and Mask variables [20000823]
- *
- * 20000731:
- * - global union vars causing segfaults in png_read_filter_row_mmx_sub()?
- *
- * 20000822:
- * - ARGH, stupid png_read_filter_row_mmx_sub() segfault only happens with
- * shared-library (-fPIC) version! Code works just fine as part of static
- * library. Damn damn damn damn damn, should have tested that sooner.
- * ebx is getting clobbered again (explicitly this time); need to save it
- * on stack or rewrite asm code to avoid using it altogether. Blargh!
- *
- * 20000823:
- * - first section was trickiest; all remaining sections have ebx -> edx now.
- * (-fPIC works again.) Also added missing underscores to various Shift*
- * and *Mask* globals and got rid of leading "$" signs.
- *
- * 20000826:
- * - added visual separators to help navigate microscopic printed copies
- * (http://pobox.com/~newt/code/gpr-latest.zip, mode 10); started working
- * on png_read_filter_row_mmx_avg()
- *
- * 20000828:
- * - finished png_read_filter_row_mmx_avg(): only Paeth left! (930 lines...)
- * What the hell, did png_read_filter_row_mmx_paeth(), too. Comments not
- * cleaned up/shortened in either routine, but functionality is complete
- * and seems to be working fine.
- *
- * 20000829:
- * - ahhh, figured out last(?) bit of gcc/gas asm-fu: if register is listed
- * as an input reg (with dummy output variables, etc.), then it *cannot*
- * also appear in the clobber list or gcc 2.95.2 will barf. The solution
- * is simple enough...
- *
- * 20000914:
- * - bug in png_read_filter_row_mmx_avg(): 16-bit grayscale not handled
- * correctly (but 48-bit RGB just fine)
- *
- * 20000916:
- * - fixed bug in png_read_filter_row_mmx_avg(), bpp == 2 case; three errors:
- * - "_ShiftBpp.use = 24;" should have been "_ShiftBpp.use = 16;"
- * - "_ShiftRem.use = 40;" should have been "_ShiftRem.use = 48;"
- * - "psllq _ShiftRem, %%mm2" should have been "psrlq _ShiftRem, %%mm2"
- *
- * 20010101:
- * - added new png_init_mmx_flags() function (here only because it needs to
- * call mmxsupport(), which should probably become global png_mmxsupport());
- * modified other MMX routines to run conditionally (png_ptr->asm_flags)
- *
- * 20010103:
- * - renamed mmxsupport() to png_mmx_support(), with auto-set of mmx_supported,
- * and made it public; moved png_init_mmx_flags() to png.c as internal func
- *
- * 20010104:
- * - removed dependency on png_read_filter_row_c() (C code already duplicated
- * within MMX version of png_read_filter_row()) so no longer necessary to
- * compile it into pngrutil.o
- *
- * 20010310:
- * - fixed buffer-overrun bug in png_combine_row() C code (non-MMX)
- *
- * STILL TO DO:
- * - test png_do_read_interlace() 64-bit case (pixel_bytes == 8)
- * - write MMX code for 48-bit case (pixel_bytes == 6)
- * - figure out what's up with 24-bit case (pixel_bytes == 3):
- * why subtract 8 from width_mmx in the pass 4/5 case?
- * (only width_mmx case) (near line 1606)
- * - rewrite all MMX interlacing code so it's aligned with beginning
- * of the row buffer, not the end (see 19991007 for details)
- * x pick one version of mmxsupport() and get rid of the other
- * - add error messages to any remaining bogus default cases
- * - enable pixel_depth == 8 cases in png_read_filter_row()? (test speed)
- * x add support for runtime enable/disable/query of various MMX routines
- */
-
-#define PNG_INTERNAL
-#include "png.h"
-
-#if defined(PNG_USE_PNGGCCRD)
-
-int PNGAPI png_mmx_support(void);
-
-#ifdef PNG_USE_LOCAL_ARRAYS
-static const int FARDATA png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
-static const int FARDATA png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
-static const int FARDATA png_pass_width[7] = {8, 4, 4, 2, 2, 1, 1};
-#endif
-
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
-/* djgpp, Win32, and Cygwin add their own underscores to global variables,
- * so define them without: */
-#if defined(__DJGPP__) || defined(WIN32) || defined(__CYGWIN__)
-# define _mmx_supported mmx_supported
-# define _const4 const4
-# define _const6 const6
-# define _mask8_0 mask8_0
-# define _mask16_1 mask16_1
-# define _mask16_0 mask16_0
-# define _mask24_2 mask24_2
-# define _mask24_1 mask24_1
-# define _mask24_0 mask24_0
-# define _mask32_3 mask32_3
-# define _mask32_2 mask32_2
-# define _mask32_1 mask32_1
-# define _mask32_0 mask32_0
-# define _mask48_5 mask48_5
-# define _mask48_4 mask48_4
-# define _mask48_3 mask48_3
-# define _mask48_2 mask48_2
-# define _mask48_1 mask48_1
-# define _mask48_0 mask48_0
-# define _LBCarryMask LBCarryMask
-# define _HBClearMask HBClearMask
-# define _ActiveMask ActiveMask
-# define _ActiveMask2 ActiveMask2
-# define _ActiveMaskEnd ActiveMaskEnd
-# define _ShiftBpp ShiftBpp
-# define _ShiftRem ShiftRem
-#ifdef PNG_THREAD_UNSAFE_OK
-# define _unmask unmask
-# define _FullLength FullLength
-# define _MMXLength MMXLength
-# define _dif dif
-# define _patemp patemp
-# define _pbtemp pbtemp
-# define _pctemp pctemp
-#endif
-#endif
-
-
-/* These constants are used in the inlined MMX assembly code.
- Ignore gcc's "At top level: defined but not used" warnings. */
-
-/* GRR 20000706: originally _unmask was needed only when compiling with -fPIC,
- * since that case uses the %ebx register for indexing the Global Offset Table
- * and there were no other registers available. But gcc 2.95 and later emit
- * "more than 10 operands in `asm'" errors when %ebx is used to preload unmask
- * in the non-PIC case, so we'll just use the global unconditionally now.
- */
-#ifdef PNG_THREAD_UNSAFE_OK
-static int _unmask;
-#endif
-
-static unsigned long long _mask8_0 = 0x0102040810204080LL;
-
-static unsigned long long _mask16_1 = 0x0101020204040808LL;
-static unsigned long long _mask16_0 = 0x1010202040408080LL;
-
-static unsigned long long _mask24_2 = 0x0101010202020404LL;
-static unsigned long long _mask24_1 = 0x0408080810101020LL;
-static unsigned long long _mask24_0 = 0x2020404040808080LL;
-
-static unsigned long long _mask32_3 = 0x0101010102020202LL;
-static unsigned long long _mask32_2 = 0x0404040408080808LL;
-static unsigned long long _mask32_1 = 0x1010101020202020LL;
-static unsigned long long _mask32_0 = 0x4040404080808080LL;
-
-static unsigned long long _mask48_5 = 0x0101010101010202LL;
-static unsigned long long _mask48_4 = 0x0202020204040404LL;
-static unsigned long long _mask48_3 = 0x0404080808080808LL;
-static unsigned long long _mask48_2 = 0x1010101010102020LL;
-static unsigned long long _mask48_1 = 0x2020202040404040LL;
-static unsigned long long _mask48_0 = 0x4040808080808080LL;
-
-static unsigned long long _const4 = 0x0000000000FFFFFFLL;
-//static unsigned long long _const5 = 0x000000FFFFFF0000LL; // NOT USED
-static unsigned long long _const6 = 0x00000000000000FFLL;
-
-// These are used in the row-filter routines and should/would be local
-// variables if not for gcc addressing limitations.
-// WARNING: Their presence probably defeats the thread safety of libpng.
-
-#ifdef PNG_THREAD_UNSAFE_OK
-static png_uint_32 _FullLength;
-static png_uint_32 _MMXLength;
-static int _dif;
-static int _patemp; // temp variables for Paeth routine
-static int _pbtemp;
-static int _pctemp;
-#endif
-
-void /* PRIVATE */
-png_squelch_warnings(void)
-{
-#ifdef PNG_THREAD_UNSAFE_OK
- _dif = _dif;
- _patemp = _patemp;
- _pbtemp = _pbtemp;
- _pctemp = _pctemp;
- _MMXLength = _MMXLength;
-#endif
- _const4 = _const4;
- _const6 = _const6;
- _mask8_0 = _mask8_0;
- _mask16_1 = _mask16_1;
- _mask16_0 = _mask16_0;
- _mask24_2 = _mask24_2;
- _mask24_1 = _mask24_1;
- _mask24_0 = _mask24_0;
- _mask32_3 = _mask32_3;
- _mask32_2 = _mask32_2;
- _mask32_1 = _mask32_1;
- _mask32_0 = _mask32_0;
- _mask48_5 = _mask48_5;
- _mask48_4 = _mask48_4;
- _mask48_3 = _mask48_3;
- _mask48_2 = _mask48_2;
- _mask48_1 = _mask48_1;
- _mask48_0 = _mask48_0;
-}
-#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
-
-
-static int _mmx_supported = 2;
-
-/*===========================================================================*/
-/* */
-/* P N G _ C O M B I N E _ R O W */
-/* */
-/*===========================================================================*/
-
-#if defined(PNG_HAVE_ASSEMBLER_COMBINE_ROW)
-
-#define BPP2 2
-#define BPP3 3 /* bytes per pixel (a.k.a. pixel_bytes) */
-#define BPP4 4
-#define BPP6 6 /* (defined only to help avoid cut-and-paste errors) */
-#define BPP8 8
-
-/* Combines the row recently read in with the previous row.
- This routine takes care of alpha and transparency if requested.
- This routine also handles the two methods of progressive display
- of interlaced images, depending on the mask value.
- The mask value describes which pixels are to be combined with
- the row. The pattern always repeats every 8 pixels, so just 8
- bits are needed. A one indicates the pixel is to be combined; a
- zero indicates the pixel is to be skipped. This is in addition
- to any alpha or transparency value associated with the pixel.
- If you want all pixels to be combined, pass 0xff (255) in mask. */
-
-/* Use this routine for the x86 platform - it uses a faster MMX routine
- if the machine supports MMX. */
-
-void /* PRIVATE */
-png_combine_row(png_structp png_ptr, png_bytep row, int mask)
-{
- png_debug(1, "in png_combine_row (pnggccrd.c)\n");
-
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
- if (_mmx_supported == 2) {
- /* this should have happened in png_init_mmx_flags() already */
- png_warning(png_ptr, "asm_flags may not have been initialized");
- png_mmx_support();
- }
-#endif
-
- if (mask == 0xff)
- {
- png_debug(2,"mask == 0xff: doing single png_memcpy()\n");
- png_memcpy(row, png_ptr->row_buf + 1,
- (png_size_t)((png_ptr->width * png_ptr->row_info.pixel_depth + 7) >> 3));
- }
- else /* (png_combine_row() is never called with mask == 0) */
- {
- switch (png_ptr->row_info.pixel_depth)
- {
- case 1: /* png_ptr->row_info.pixel_depth */
- {
- png_bytep sp;
- png_bytep dp;
- int s_inc, s_start, s_end;
- int m;
- int shift;
- png_uint_32 i;
-
- sp = png_ptr->row_buf + 1;
- dp = row;
- m = 0x80;
-#if defined(PNG_READ_PACKSWAP_SUPPORTED)
- if (png_ptr->transformations & PNG_PACKSWAP)
- {
- s_start = 0;
- s_end = 7;
- s_inc = 1;
- }
- else
-#endif
- {
- s_start = 7;
- s_end = 0;
- s_inc = -1;
- }
-
- shift = s_start;
-
- for (i = 0; i < png_ptr->width; i++)
- {
- if (m & mask)
- {
- int value;
-
- value = (*sp >> shift) & 0x1;
- *dp &= (png_byte)((0x7f7f >> (7 - shift)) & 0xff);
- *dp |= (png_byte)(value << shift);
- }
-
- if (shift == s_end)
- {
- shift = s_start;
- sp++;
- dp++;
- }
- else
- shift += s_inc;
-
- if (m == 1)
- m = 0x80;
- else
- m >>= 1;
- }
- break;
- }
-
- case 2: /* png_ptr->row_info.pixel_depth */
- {
- png_bytep sp;
- png_bytep dp;
- int s_start, s_end, s_inc;
- int m;
- int shift;
- png_uint_32 i;
- int value;
-
- sp = png_ptr->row_buf + 1;
- dp = row;
- m = 0x80;
-#if defined(PNG_READ_PACKSWAP_SUPPORTED)
- if (png_ptr->transformations & PNG_PACKSWAP)
- {
- s_start = 0;
- s_end = 6;
- s_inc = 2;
- }
- else
-#endif
- {
- s_start = 6;
- s_end = 0;
- s_inc = -2;
- }
-
- shift = s_start;
-
- for (i = 0; i < png_ptr->width; i++)
- {
- if (m & mask)
- {
- value = (*sp >> shift) & 0x3;
- *dp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff);
- *dp |= (png_byte)(value << shift);
- }
-
- if (shift == s_end)
- {
- shift = s_start;
- sp++;
- dp++;
- }
- else
- shift += s_inc;
- if (m == 1)
- m = 0x80;
- else
- m >>= 1;
- }
- break;
- }
-
- case 4: /* png_ptr->row_info.pixel_depth */
- {
- png_bytep sp;
- png_bytep dp;
- int s_start, s_end, s_inc;
- int m;
- int shift;
- png_uint_32 i;
- int value;
-
- sp = png_ptr->row_buf + 1;
- dp = row;
- m = 0x80;
-#if defined(PNG_READ_PACKSWAP_SUPPORTED)
- if (png_ptr->transformations & PNG_PACKSWAP)
- {
- s_start = 0;
- s_end = 4;
- s_inc = 4;
- }
- else
-#endif
- {
- s_start = 4;
- s_end = 0;
- s_inc = -4;
- }
- shift = s_start;
-
- for (i = 0; i < png_ptr->width; i++)
- {
- if (m & mask)
- {
- value = (*sp >> shift) & 0xf;
- *dp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff);
- *dp |= (png_byte)(value << shift);
- }
-
- if (shift == s_end)
- {
- shift = s_start;
- sp++;
- dp++;
- }
- else
- shift += s_inc;
- if (m == 1)
- m = 0x80;
- else
- m >>= 1;
- }
- break;
- }
-
- case 8: /* png_ptr->row_info.pixel_depth */
- {
- png_bytep srcptr;
- png_bytep dstptr;
-
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
- if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
- /* && _mmx_supported */ )
- {
- png_uint_32 len;
- int diff;
- int dummy_value_a; // fix 'forbidden register spilled' error
- int dummy_value_d;
- int dummy_value_c;
- int dummy_value_S;
- int dummy_value_D;
- _unmask = ~mask; // global variable for -fPIC version
- srcptr = png_ptr->row_buf + 1;
- dstptr = row;
- len = png_ptr->width &~7; // reduce to multiple of 8
- diff = (int) (png_ptr->width & 7); // amount lost
-
- __asm__ __volatile__ (
- "movd _unmask, %%mm7 \n\t" // load bit pattern
- "psubb %%mm6, %%mm6 \n\t" // zero mm6
- "punpcklbw %%mm7, %%mm7 \n\t"
- "punpcklwd %%mm7, %%mm7 \n\t"
- "punpckldq %%mm7, %%mm7 \n\t" // fill reg with 8 masks
-
- "movq _mask8_0, %%mm0 \n\t"
- "pand %%mm7, %%mm0 \n\t" // nonzero if keep byte
- "pcmpeqb %%mm6, %%mm0 \n\t" // zeros->1s, v versa
-
-// preload "movl len, %%ecx \n\t" // load length of line
-// preload "movl srcptr, %%esi \n\t" // load source
-// preload "movl dstptr, %%edi \n\t" // load dest
-
- "cmpl $0, %%ecx \n\t" // len == 0 ?
- "je mainloop8end \n\t"
-
- "mainloop8: \n\t"
- "movq (%%esi), %%mm4 \n\t" // *srcptr
- "pand %%mm0, %%mm4 \n\t"
- "movq %%mm0, %%mm6 \n\t"
- "pandn (%%edi), %%mm6 \n\t" // *dstptr
- "por %%mm6, %%mm4 \n\t"
- "movq %%mm4, (%%edi) \n\t"
- "addl $8, %%esi \n\t" // inc by 8 bytes processed
- "addl $8, %%edi \n\t"
- "subl $8, %%ecx \n\t" // dec by 8 pixels processed
- "ja mainloop8 \n\t"
-
- "mainloop8end: \n\t"
-// preload "movl diff, %%ecx \n\t" // (diff is in eax)
- "movl %%eax, %%ecx \n\t"
- "cmpl $0, %%ecx \n\t"
- "jz end8 \n\t"
-// preload "movl mask, %%edx \n\t"
- "sall $24, %%edx \n\t" // make low byte, high byte
-
- "secondloop8: \n\t"
- "sall %%edx \n\t" // move high bit to CF
- "jnc skip8 \n\t" // if CF = 0
- "movb (%%esi), %%al \n\t"
- "movb %%al, (%%edi) \n\t"
-
- "skip8: \n\t"
- "incl %%esi \n\t"
- "incl %%edi \n\t"
- "decl %%ecx \n\t"
- "jnz secondloop8 \n\t"
-
- "end8: \n\t"
- "EMMS \n\t" // DONE
-
- : "=a" (dummy_value_a), // output regs (dummy)
- "=d" (dummy_value_d),
- "=c" (dummy_value_c),
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "3" (srcptr), // esi // input regs
- "4" (dstptr), // edi
- "0" (diff), // eax
-// was (unmask) "b" RESERVED // ebx // Global Offset Table idx
- "2" (len), // ecx
- "1" (mask) // edx
-
-#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0", "%mm4", "%mm6", "%mm7" // clobber list
-#endif
- );
- }
- else /* mmx _not supported - Use modified C routine */
-#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
- {
- register png_uint_32 i;
- png_uint_32 initial_val = png_pass_start[png_ptr->pass];
- /* png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; */
- register int stride = png_pass_inc[png_ptr->pass];
- /* png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; */
- register int rep_bytes = png_pass_width[png_ptr->pass];
- /* png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; */
- png_uint_32 len = png_ptr->width &~7; /* reduce to mult. of 8 */
- int diff = (int) (png_ptr->width & 7); /* amount lost */
- register png_uint_32 final_val = len; /* GRR bugfix */
-
- srcptr = png_ptr->row_buf + 1 + initial_val;
- dstptr = row + initial_val;
-
- for (i = initial_val; i < final_val; i += stride)
- {
- png_memcpy(dstptr, srcptr, rep_bytes);
- srcptr += stride;
- dstptr += stride;
- }
- if (diff) /* number of leftover pixels: 3 for pngtest */
- {
- final_val+=diff /* *BPP1 */ ;
- for (; i < final_val; i += stride)
- {
- if (rep_bytes > (int)(final_val-i))
- rep_bytes = (int)(final_val-i);
- png_memcpy(dstptr, srcptr, rep_bytes);
- srcptr += stride;
- dstptr += stride;
- }
- }
-
- } /* end of else (_mmx_supported) */
-
- break;
- } /* end 8 bpp */
-
- case 16: /* png_ptr->row_info.pixel_depth */
- {
- png_bytep srcptr;
- png_bytep dstptr;
-
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
- if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
- /* && _mmx_supported */ )
- {
- png_uint_32 len;
- int diff;
- int dummy_value_a; // fix 'forbidden register spilled' error
- int dummy_value_d;
- int dummy_value_c;
- int dummy_value_S;
- int dummy_value_D;
- _unmask = ~mask; // global variable for -fPIC version
- srcptr = png_ptr->row_buf + 1;
- dstptr = row;
- len = png_ptr->width &~7; // reduce to multiple of 8
- diff = (int) (png_ptr->width & 7); // amount lost //
-
- __asm__ __volatile__ (
- "movd _unmask, %%mm7 \n\t" // load bit pattern
- "psubb %%mm6, %%mm6 \n\t" // zero mm6
- "punpcklbw %%mm7, %%mm7 \n\t"
- "punpcklwd %%mm7, %%mm7 \n\t"
- "punpckldq %%mm7, %%mm7 \n\t" // fill reg with 8 masks
-
- "movq _mask16_0, %%mm0 \n\t"
- "movq _mask16_1, %%mm1 \n\t"
-
- "pand %%mm7, %%mm0 \n\t"
- "pand %%mm7, %%mm1 \n\t"
-
- "pcmpeqb %%mm6, %%mm0 \n\t"
- "pcmpeqb %%mm6, %%mm1 \n\t"
-
-// preload "movl len, %%ecx \n\t" // load length of line
-// preload "movl srcptr, %%esi \n\t" // load source
-// preload "movl dstptr, %%edi \n\t" // load dest
-
- "cmpl $0, %%ecx \n\t"
- "jz mainloop16end \n\t"
-
- "mainloop16: \n\t"
- "movq (%%esi), %%mm4 \n\t"
- "pand %%mm0, %%mm4 \n\t"
- "movq %%mm0, %%mm6 \n\t"
- "movq (%%edi), %%mm7 \n\t"
- "pandn %%mm7, %%mm6 \n\t"
- "por %%mm6, %%mm4 \n\t"
- "movq %%mm4, (%%edi) \n\t"
-
- "movq 8(%%esi), %%mm5 \n\t"
- "pand %%mm1, %%mm5 \n\t"
- "movq %%mm1, %%mm7 \n\t"
- "movq 8(%%edi), %%mm6 \n\t"
- "pandn %%mm6, %%mm7 \n\t"
- "por %%mm7, %%mm5 \n\t"
- "movq %%mm5, 8(%%edi) \n\t"
-
- "addl $16, %%esi \n\t" // inc by 16 bytes processed
- "addl $16, %%edi \n\t"
- "subl $8, %%ecx \n\t" // dec by 8 pixels processed
- "ja mainloop16 \n\t"
-
- "mainloop16end: \n\t"
-// preload "movl diff, %%ecx \n\t" // (diff is in eax)
- "movl %%eax, %%ecx \n\t"
- "cmpl $0, %%ecx \n\t"
- "jz end16 \n\t"
-// preload "movl mask, %%edx \n\t"
- "sall $24, %%edx \n\t" // make low byte, high byte
-
- "secondloop16: \n\t"
- "sall %%edx \n\t" // move high bit to CF
- "jnc skip16 \n\t" // if CF = 0
- "movw (%%esi), %%ax \n\t"
- "movw %%ax, (%%edi) \n\t"
-
- "skip16: \n\t"
- "addl $2, %%esi \n\t"
- "addl $2, %%edi \n\t"
- "decl %%ecx \n\t"
- "jnz secondloop16 \n\t"
-
- "end16: \n\t"
- "EMMS \n\t" // DONE
-
- : "=a" (dummy_value_a), // output regs (dummy)
- "=c" (dummy_value_c),
- "=d" (dummy_value_d),
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "0" (diff), // eax // input regs
-// was (unmask) " " RESERVED // ebx // Global Offset Table idx
- "1" (len), // ecx
- "2" (mask), // edx
- "3" (srcptr), // esi
- "4" (dstptr) // edi
-
-#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0", "%mm1", "%mm4" // clobber list
- , "%mm5", "%mm6", "%mm7"
-#endif
- );
- }
- else /* mmx _not supported - Use modified C routine */
-#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
- {
- register png_uint_32 i;
- png_uint_32 initial_val = BPP2 * png_pass_start[png_ptr->pass];
- /* png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; */
- register int stride = BPP2 * png_pass_inc[png_ptr->pass];
- /* png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; */
- register int rep_bytes = BPP2 * png_pass_width[png_ptr->pass];
- /* png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; */
- png_uint_32 len = png_ptr->width &~7; /* reduce to mult. of 8 */
- int diff = (int) (png_ptr->width & 7); /* amount lost */
- register png_uint_32 final_val = BPP2 * len; /* GRR bugfix */
-
- srcptr = png_ptr->row_buf + 1 + initial_val;
- dstptr = row + initial_val;
-
- for (i = initial_val; i < final_val; i += stride)
- {
- png_memcpy(dstptr, srcptr, rep_bytes);
- srcptr += stride;
- dstptr += stride;
- }
- if (diff) /* number of leftover pixels: 3 for pngtest */
- {
- final_val+=diff*BPP2;
- for (; i < final_val; i += stride)
- {
- if (rep_bytes > (int)(final_val-i))
- rep_bytes = (int)(final_val-i);
- png_memcpy(dstptr, srcptr, rep_bytes);
- srcptr += stride;
- dstptr += stride;
- }
- }
- } /* end of else (_mmx_supported) */
-
- break;
- } /* end 16 bpp */
-
- case 24: /* png_ptr->row_info.pixel_depth */
- {
- png_bytep srcptr;
- png_bytep dstptr;
-
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
- if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
- /* && _mmx_supported */ )
- {
- png_uint_32 len;
- int diff;
- int dummy_value_a; // fix 'forbidden register spilled' error
- int dummy_value_d;
- int dummy_value_c;
- int dummy_value_S;
- int dummy_value_D;
- _unmask = ~mask; // global variable for -fPIC version
- srcptr = png_ptr->row_buf + 1;
- dstptr = row;
- len = png_ptr->width &~7; // reduce to multiple of 8
- diff = (int) (png_ptr->width & 7); // amount lost //
-
- __asm__ __volatile__ (
- "movd _unmask, %%mm7 \n\t" // load bit pattern
- "psubb %%mm6, %%mm6 \n\t" // zero mm6
- "punpcklbw %%mm7, %%mm7 \n\t"
- "punpcklwd %%mm7, %%mm7 \n\t"
- "punpckldq %%mm7, %%mm7 \n\t" // fill reg with 8 masks
-
- "movq _mask24_0, %%mm0 \n\t"
- "movq _mask24_1, %%mm1 \n\t"
- "movq _mask24_2, %%mm2 \n\t"
-
- "pand %%mm7, %%mm0 \n\t"
- "pand %%mm7, %%mm1 \n\t"
- "pand %%mm7, %%mm2 \n\t"
-
- "pcmpeqb %%mm6, %%mm0 \n\t"
- "pcmpeqb %%mm6, %%mm1 \n\t"
- "pcmpeqb %%mm6, %%mm2 \n\t"
-
-// preload "movl len, %%ecx \n\t" // load length of line
-// preload "movl srcptr, %%esi \n\t" // load source
-// preload "movl dstptr, %%edi \n\t" // load dest
-
- "cmpl $0, %%ecx \n\t"
- "jz mainloop24end \n\t"
-
- "mainloop24: \n\t"
- "movq (%%esi), %%mm4 \n\t"
- "pand %%mm0, %%mm4 \n\t"
- "movq %%mm0, %%mm6 \n\t"
- "movq (%%edi), %%mm7 \n\t"
- "pandn %%mm7, %%mm6 \n\t"
- "por %%mm6, %%mm4 \n\t"
- "movq %%mm4, (%%edi) \n\t"
-
- "movq 8(%%esi), %%mm5 \n\t"
- "pand %%mm1, %%mm5 \n\t"
- "movq %%mm1, %%mm7 \n\t"
- "movq 8(%%edi), %%mm6 \n\t"
- "pandn %%mm6, %%mm7 \n\t"
- "por %%mm7, %%mm5 \n\t"
- "movq %%mm5, 8(%%edi) \n\t"
-
- "movq 16(%%esi), %%mm6 \n\t"
- "pand %%mm2, %%mm6 \n\t"
- "movq %%mm2, %%mm4 \n\t"
- "movq 16(%%edi), %%mm7 \n\t"
- "pandn %%mm7, %%mm4 \n\t"
- "por %%mm4, %%mm6 \n\t"
- "movq %%mm6, 16(%%edi) \n\t"
-
- "addl $24, %%esi \n\t" // inc by 24 bytes processed
- "addl $24, %%edi \n\t"
- "subl $8, %%ecx \n\t" // dec by 8 pixels processed
-
- "ja mainloop24 \n\t"
-
- "mainloop24end: \n\t"
-// preload "movl diff, %%ecx \n\t" // (diff is in eax)
- "movl %%eax, %%ecx \n\t"
- "cmpl $0, %%ecx \n\t"
- "jz end24 \n\t"
-// preload "movl mask, %%edx \n\t"
- "sall $24, %%edx \n\t" // make low byte, high byte
-
- "secondloop24: \n\t"
- "sall %%edx \n\t" // move high bit to CF
- "jnc skip24 \n\t" // if CF = 0
- "movw (%%esi), %%ax \n\t"
- "movw %%ax, (%%edi) \n\t"
- "xorl %%eax, %%eax \n\t"
- "movb 2(%%esi), %%al \n\t"
- "movb %%al, 2(%%edi) \n\t"
-
- "skip24: \n\t"
- "addl $3, %%esi \n\t"
- "addl $3, %%edi \n\t"
- "decl %%ecx \n\t"
- "jnz secondloop24 \n\t"
-
- "end24: \n\t"
- "EMMS \n\t" // DONE
-
- : "=a" (dummy_value_a), // output regs (dummy)
- "=d" (dummy_value_d),
- "=c" (dummy_value_c),
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "3" (srcptr), // esi // input regs
- "4" (dstptr), // edi
- "0" (diff), // eax
-// was (unmask) "b" RESERVED // ebx // Global Offset Table idx
- "2" (len), // ecx
- "1" (mask) // edx
-
-#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0", "%mm1", "%mm2" // clobber list
- , "%mm4", "%mm5", "%mm6", "%mm7"
-#endif
- );
- }
- else /* mmx _not supported - Use modified C routine */
-#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
- {
- register png_uint_32 i;
- png_uint_32 initial_val = BPP3 * png_pass_start[png_ptr->pass];
- /* png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; */
- register int stride = BPP3 * png_pass_inc[png_ptr->pass];
- /* png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; */
- register int rep_bytes = BPP3 * png_pass_width[png_ptr->pass];
- /* png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; */
- png_uint_32 len = png_ptr->width &~7; /* reduce to mult. of 8 */
- int diff = (int) (png_ptr->width & 7); /* amount lost */
- register png_uint_32 final_val = BPP3 * len; /* GRR bugfix */
-
- srcptr = png_ptr->row_buf + 1 + initial_val;
- dstptr = row + initial_val;
-
- for (i = initial_val; i < final_val; i += stride)
- {
- png_memcpy(dstptr, srcptr, rep_bytes);
- srcptr += stride;
- dstptr += stride;
- }
- if (diff) /* number of leftover pixels: 3 for pngtest */
- {
- final_val+=diff*BPP3;
- for (; i < final_val; i += stride)
- {
- if (rep_bytes > (int)(final_val-i))
- rep_bytes = (int)(final_val-i);
- png_memcpy(dstptr, srcptr, rep_bytes);
- srcptr += stride;
- dstptr += stride;
- }
- }
- } /* end of else (_mmx_supported) */
-
- break;
- } /* end 24 bpp */
-
- case 32: /* png_ptr->row_info.pixel_depth */
- {
- png_bytep srcptr;
- png_bytep dstptr;
-
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
- if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
- /* && _mmx_supported */ )
- {
- png_uint_32 len;
- int diff;
- int dummy_value_a; // fix 'forbidden register spilled' error
- int dummy_value_d;
- int dummy_value_c;
- int dummy_value_S;
- int dummy_value_D;
- _unmask = ~mask; // global variable for -fPIC version
- srcptr = png_ptr->row_buf + 1;
- dstptr = row;
- len = png_ptr->width &~7; // reduce to multiple of 8
- diff = (int) (png_ptr->width & 7); // amount lost //
-
- __asm__ __volatile__ (
- "movd _unmask, %%mm7 \n\t" // load bit pattern
- "psubb %%mm6, %%mm6 \n\t" // zero mm6
- "punpcklbw %%mm7, %%mm7 \n\t"
- "punpcklwd %%mm7, %%mm7 \n\t"
- "punpckldq %%mm7, %%mm7 \n\t" // fill reg with 8 masks
-
- "movq _mask32_0, %%mm0 \n\t"
- "movq _mask32_1, %%mm1 \n\t"
- "movq _mask32_2, %%mm2 \n\t"
- "movq _mask32_3, %%mm3 \n\t"
-
- "pand %%mm7, %%mm0 \n\t"
- "pand %%mm7, %%mm1 \n\t"
- "pand %%mm7, %%mm2 \n\t"
- "pand %%mm7, %%mm3 \n\t"
-
- "pcmpeqb %%mm6, %%mm0 \n\t"
- "pcmpeqb %%mm6, %%mm1 \n\t"
- "pcmpeqb %%mm6, %%mm2 \n\t"
- "pcmpeqb %%mm6, %%mm3 \n\t"
-
-// preload "movl len, %%ecx \n\t" // load length of line
-// preload "movl srcptr, %%esi \n\t" // load source
-// preload "movl dstptr, %%edi \n\t" // load dest
-
- "cmpl $0, %%ecx \n\t" // lcr
- "jz mainloop32end \n\t"
-
- "mainloop32: \n\t"
- "movq (%%esi), %%mm4 \n\t"
- "pand %%mm0, %%mm4 \n\t"
- "movq %%mm0, %%mm6 \n\t"
- "movq (%%edi), %%mm7 \n\t"
- "pandn %%mm7, %%mm6 \n\t"
- "por %%mm6, %%mm4 \n\t"
- "movq %%mm4, (%%edi) \n\t"
-
- "movq 8(%%esi), %%mm5 \n\t"
- "pand %%mm1, %%mm5 \n\t"
- "movq %%mm1, %%mm7 \n\t"
- "movq 8(%%edi), %%mm6 \n\t"
- "pandn %%mm6, %%mm7 \n\t"
- "por %%mm7, %%mm5 \n\t"
- "movq %%mm5, 8(%%edi) \n\t"
-
- "movq 16(%%esi), %%mm6 \n\t"
- "pand %%mm2, %%mm6 \n\t"
- "movq %%mm2, %%mm4 \n\t"
- "movq 16(%%edi), %%mm7 \n\t"
- "pandn %%mm7, %%mm4 \n\t"
- "por %%mm4, %%mm6 \n\t"
- "movq %%mm6, 16(%%edi) \n\t"
-
- "movq 24(%%esi), %%mm7 \n\t"
- "pand %%mm3, %%mm7 \n\t"
- "movq %%mm3, %%mm5 \n\t"
- "movq 24(%%edi), %%mm4 \n\t"
- "pandn %%mm4, %%mm5 \n\t"
- "por %%mm5, %%mm7 \n\t"
- "movq %%mm7, 24(%%edi) \n\t"
-
- "addl $32, %%esi \n\t" // inc by 32 bytes processed
- "addl $32, %%edi \n\t"
- "subl $8, %%ecx \n\t" // dec by 8 pixels processed
- "ja mainloop32 \n\t"
-
- "mainloop32end: \n\t"
-// preload "movl diff, %%ecx \n\t" // (diff is in eax)
- "movl %%eax, %%ecx \n\t"
- "cmpl $0, %%ecx \n\t"
- "jz end32 \n\t"
-// preload "movl mask, %%edx \n\t"
- "sall $24, %%edx \n\t" // low byte => high byte
-
- "secondloop32: \n\t"
- "sall %%edx \n\t" // move high bit to CF
- "jnc skip32 \n\t" // if CF = 0
- "movl (%%esi), %%eax \n\t"
- "movl %%eax, (%%edi) \n\t"
-
- "skip32: \n\t"
- "addl $4, %%esi \n\t"
- "addl $4, %%edi \n\t"
- "decl %%ecx \n\t"
- "jnz secondloop32 \n\t"
-
- "end32: \n\t"
- "EMMS \n\t" // DONE
-
- : "=a" (dummy_value_a), // output regs (dummy)
- "=d" (dummy_value_d),
- "=c" (dummy_value_c),
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "3" (srcptr), // esi // input regs
- "4" (dstptr), // edi
- "0" (diff), // eax
-// was (unmask) "b" RESERVED // ebx // Global Offset Table idx
- "2" (len), // ecx
- "1" (mask) // edx
-
-#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0", "%mm1", "%mm2", "%mm3" // clobber list
- , "%mm4", "%mm5", "%mm6", "%mm7"
-#endif
- );
- }
- else /* mmx _not supported - Use modified C routine */
-#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
- {
- register png_uint_32 i;
- png_uint_32 initial_val = BPP4 * png_pass_start[png_ptr->pass];
- /* png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; */
- register int stride = BPP4 * png_pass_inc[png_ptr->pass];
- /* png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; */
- register int rep_bytes = BPP4 * png_pass_width[png_ptr->pass];
- /* png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; */
- png_uint_32 len = png_ptr->width &~7; /* reduce to mult. of 8 */
- int diff = (int) (png_ptr->width & 7); /* amount lost */
- register png_uint_32 final_val = BPP4 * len; /* GRR bugfix */
-
- srcptr = png_ptr->row_buf + 1 + initial_val;
- dstptr = row + initial_val;
-
- for (i = initial_val; i < final_val; i += stride)
- {
- png_memcpy(dstptr, srcptr, rep_bytes);
- srcptr += stride;
- dstptr += stride;
- }
- if (diff) /* number of leftover pixels: 3 for pngtest */
- {
- final_val+=diff*BPP4;
- for (; i < final_val; i += stride)
- {
- if (rep_bytes > (int)(final_val-i))
- rep_bytes = (int)(final_val-i);
- png_memcpy(dstptr, srcptr, rep_bytes);
- srcptr += stride;
- dstptr += stride;
- }
- }
- } /* end of else (_mmx_supported) */
-
- break;
- } /* end 32 bpp */
-
- case 48: /* png_ptr->row_info.pixel_depth */
- {
- png_bytep srcptr;
- png_bytep dstptr;
-
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
- if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
- /* && _mmx_supported */ )
- {
- png_uint_32 len;
- int diff;
- int dummy_value_a; // fix 'forbidden register spilled' error
- int dummy_value_d;
- int dummy_value_c;
- int dummy_value_S;
- int dummy_value_D;
- _unmask = ~mask; // global variable for -fPIC version
- srcptr = png_ptr->row_buf + 1;
- dstptr = row;
- len = png_ptr->width &~7; // reduce to multiple of 8
- diff = (int) (png_ptr->width & 7); // amount lost //
-
- __asm__ __volatile__ (
- "movd _unmask, %%mm7 \n\t" // load bit pattern
- "psubb %%mm6, %%mm6 \n\t" // zero mm6
- "punpcklbw %%mm7, %%mm7 \n\t"
- "punpcklwd %%mm7, %%mm7 \n\t"
- "punpckldq %%mm7, %%mm7 \n\t" // fill reg with 8 masks
-
- "movq _mask48_0, %%mm0 \n\t"
- "movq _mask48_1, %%mm1 \n\t"
- "movq _mask48_2, %%mm2 \n\t"
- "movq _mask48_3, %%mm3 \n\t"
- "movq _mask48_4, %%mm4 \n\t"
- "movq _mask48_5, %%mm5 \n\t"
-
- "pand %%mm7, %%mm0 \n\t"
- "pand %%mm7, %%mm1 \n\t"
- "pand %%mm7, %%mm2 \n\t"
- "pand %%mm7, %%mm3 \n\t"
- "pand %%mm7, %%mm4 \n\t"
- "pand %%mm7, %%mm5 \n\t"
-
- "pcmpeqb %%mm6, %%mm0 \n\t"
- "pcmpeqb %%mm6, %%mm1 \n\t"
- "pcmpeqb %%mm6, %%mm2 \n\t"
- "pcmpeqb %%mm6, %%mm3 \n\t"
- "pcmpeqb %%mm6, %%mm4 \n\t"
- "pcmpeqb %%mm6, %%mm5 \n\t"
-
-// preload "movl len, %%ecx \n\t" // load length of line
-// preload "movl srcptr, %%esi \n\t" // load source
-// preload "movl dstptr, %%edi \n\t" // load dest
-
- "cmpl $0, %%ecx \n\t"
- "jz mainloop48end \n\t"
-
- "mainloop48: \n\t"
- "movq (%%esi), %%mm7 \n\t"
- "pand %%mm0, %%mm7 \n\t"
- "movq %%mm0, %%mm6 \n\t"
- "pandn (%%edi), %%mm6 \n\t"
- "por %%mm6, %%mm7 \n\t"
- "movq %%mm7, (%%edi) \n\t"
-
- "movq 8(%%esi), %%mm6 \n\t"
- "pand %%mm1, %%mm6 \n\t"
- "movq %%mm1, %%mm7 \n\t"
- "pandn 8(%%edi), %%mm7 \n\t"
- "por %%mm7, %%mm6 \n\t"
- "movq %%mm6, 8(%%edi) \n\t"
-
- "movq 16(%%esi), %%mm6 \n\t"
- "pand %%mm2, %%mm6 \n\t"
- "movq %%mm2, %%mm7 \n\t"
- "pandn 16(%%edi), %%mm7 \n\t"
- "por %%mm7, %%mm6 \n\t"
- "movq %%mm6, 16(%%edi) \n\t"
-
- "movq 24(%%esi), %%mm7 \n\t"
- "pand %%mm3, %%mm7 \n\t"
- "movq %%mm3, %%mm6 \n\t"
- "pandn 24(%%edi), %%mm6 \n\t"
- "por %%mm6, %%mm7 \n\t"
- "movq %%mm7, 24(%%edi) \n\t"
-
- "movq 32(%%esi), %%mm6 \n\t"
- "pand %%mm4, %%mm6 \n\t"
- "movq %%mm4, %%mm7 \n\t"
- "pandn 32(%%edi), %%mm7 \n\t"
- "por %%mm7, %%mm6 \n\t"
- "movq %%mm6, 32(%%edi) \n\t"
-
- "movq 40(%%esi), %%mm7 \n\t"
- "pand %%mm5, %%mm7 \n\t"
- "movq %%mm5, %%mm6 \n\t"
- "pandn 40(%%edi), %%mm6 \n\t"
- "por %%mm6, %%mm7 \n\t"
- "movq %%mm7, 40(%%edi) \n\t"
-
- "addl $48, %%esi \n\t" // inc by 48 bytes processed
- "addl $48, %%edi \n\t"
- "subl $8, %%ecx \n\t" // dec by 8 pixels processed
-
- "ja mainloop48 \n\t"
-
- "mainloop48end: \n\t"
-// preload "movl diff, %%ecx \n\t" // (diff is in eax)
- "movl %%eax, %%ecx \n\t"
- "cmpl $0, %%ecx \n\t"
- "jz end48 \n\t"
-// preload "movl mask, %%edx \n\t"
- "sall $24, %%edx \n\t" // make low byte, high byte
-
- "secondloop48: \n\t"
- "sall %%edx \n\t" // move high bit to CF
- "jnc skip48 \n\t" // if CF = 0
- "movl (%%esi), %%eax \n\t"
- "movl %%eax, (%%edi) \n\t"
-
- "skip48: \n\t"
- "addl $4, %%esi \n\t"
- "addl $4, %%edi \n\t"
- "decl %%ecx \n\t"
- "jnz secondloop48 \n\t"
-
- "end48: \n\t"
- "EMMS \n\t" // DONE
-
- : "=a" (dummy_value_a), // output regs (dummy)
- "=d" (dummy_value_d),
- "=c" (dummy_value_c),
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "3" (srcptr), // esi // input regs
- "4" (dstptr), // edi
- "0" (diff), // eax
-// was (unmask) "b" RESERVED // ebx // Global Offset Table idx
- "2" (len), // ecx
- "1" (mask) // edx
-
-#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0", "%mm1", "%mm2", "%mm3" // clobber list
- , "%mm4", "%mm5", "%mm6", "%mm7"
-#endif
- );
- }
- else /* mmx _not supported - Use modified C routine */
-#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
- {
- register png_uint_32 i;
- png_uint_32 initial_val = BPP6 * png_pass_start[png_ptr->pass];
- /* png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; */
- register int stride = BPP6 * png_pass_inc[png_ptr->pass];
- /* png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; */
- register int rep_bytes = BPP6 * png_pass_width[png_ptr->pass];
- /* png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; */
- png_uint_32 len = png_ptr->width &~7; /* reduce to mult. of 8 */
- int diff = (int) (png_ptr->width & 7); /* amount lost */
- register png_uint_32 final_val = BPP6 * len; /* GRR bugfix */
-
- srcptr = png_ptr->row_buf + 1 + initial_val;
- dstptr = row + initial_val;
-
- for (i = initial_val; i < final_val; i += stride)
- {
- png_memcpy(dstptr, srcptr, rep_bytes);
- srcptr += stride;
- dstptr += stride;
- }
- if (diff) /* number of leftover pixels: 3 for pngtest */
- {
- final_val+=diff*BPP6;
- for (; i < final_val; i += stride)
- {
- if (rep_bytes > (int)(final_val-i))
- rep_bytes = (int)(final_val-i);
- png_memcpy(dstptr, srcptr, rep_bytes);
- srcptr += stride;
- dstptr += stride;
- }
- }
- } /* end of else (_mmx_supported) */
-
- break;
- } /* end 48 bpp */
-
- case 64: /* png_ptr->row_info.pixel_depth */
- {
- png_bytep srcptr;
- png_bytep dstptr;
- register png_uint_32 i;
- png_uint_32 initial_val = BPP8 * png_pass_start[png_ptr->pass];
- /* png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; */
- register int stride = BPP8 * png_pass_inc[png_ptr->pass];
- /* png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; */
- register int rep_bytes = BPP8 * png_pass_width[png_ptr->pass];
- /* png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; */
- png_uint_32 len = png_ptr->width &~7; /* reduce to mult. of 8 */
- int diff = (int) (png_ptr->width & 7); /* amount lost */
- register png_uint_32 final_val = BPP8 * len; /* GRR bugfix */
-
- srcptr = png_ptr->row_buf + 1 + initial_val;
- dstptr = row + initial_val;
-
- for (i = initial_val; i < final_val; i += stride)
- {
- png_memcpy(dstptr, srcptr, rep_bytes);
- srcptr += stride;
- dstptr += stride;
- }
- if (diff) /* number of leftover pixels: 3 for pngtest */
- {
- final_val+=diff*BPP8;
- for (; i < final_val; i += stride)
- {
- if (rep_bytes > (int)(final_val-i))
- rep_bytes = (int)(final_val-i);
- png_memcpy(dstptr, srcptr, rep_bytes);
- srcptr += stride;
- dstptr += stride;
- }
- }
-
- break;
- } /* end 64 bpp */
-
- default: /* png_ptr->row_info.pixel_depth != 1,2,4,8,16,24,32,48,64 */
- {
- /* this should never happen */
- png_warning(png_ptr, "Invalid row_info.pixel_depth in pnggccrd");
- break;
- }
- } /* end switch (png_ptr->row_info.pixel_depth) */
-
- } /* end if (non-trivial mask) */
-
-} /* end png_combine_row() */
-
-#endif /* PNG_HAVE_ASSEMBLER_COMBINE_ROW */
-
-
-
-
-/*===========================================================================*/
-/* */
-/* P N G _ D O _ R E A D _ I N T E R L A C E */
-/* */
-/*===========================================================================*/
-
-#if defined(PNG_READ_INTERLACING_SUPPORTED)
-#if defined(PNG_HAVE_ASSEMBLER_READ_INTERLACE)
-
-/* png_do_read_interlace() is called after any 16-bit to 8-bit conversion
- * has taken place. [GRR: what other steps come before and/or after?]
- */
-
-void /* PRIVATE */
-png_do_read_interlace(png_structp png_ptr)
-{
- png_row_infop row_info = &(png_ptr->row_info);
- png_bytep row = png_ptr->row_buf + 1;
- int pass = png_ptr->pass;
-#if defined(PNG_READ_PACKSWAP_SUPPORTED)
- png_uint_32 transformations = png_ptr->transformations;
-#endif
-
- png_debug(1, "in png_do_read_interlace (pnggccrd.c)\n");
-
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
- if (_mmx_supported == 2) {
- /* this should have happened in png_init_mmx_flags() already */
- png_warning(png_ptr, "asm_flags may not have been initialized");
- png_mmx_support();
- }
-#endif
-
- if (row != NULL && row_info != NULL)
- {
- png_uint_32 final_width;
-
- final_width = row_info->width * png_pass_inc[pass];
-
- switch (row_info->pixel_depth)
- {
- case 1:
- {
- png_bytep sp, dp;
- int sshift, dshift;
- int s_start, s_end, s_inc;
- png_byte v;
- png_uint_32 i;
- int j;
-
- sp = row + (png_size_t)((row_info->width - 1) >> 3);
- dp = row + (png_size_t)((final_width - 1) >> 3);
-#if defined(PNG_READ_PACKSWAP_SUPPORTED)
- if (transformations & PNG_PACKSWAP)
- {
- sshift = (int)((row_info->width + 7) & 7);
- dshift = (int)((final_width + 7) & 7);
- s_start = 7;
- s_end = 0;
- s_inc = -1;
- }
- else
-#endif
- {
- sshift = 7 - (int)((row_info->width + 7) & 7);
- dshift = 7 - (int)((final_width + 7) & 7);
- s_start = 0;
- s_end = 7;
- s_inc = 1;
- }
-
- for (i = row_info->width; i; i--)
- {
- v = (png_byte)((*sp >> sshift) & 0x1);
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- *dp &= (png_byte)((0x7f7f >> (7 - dshift)) & 0xff);
- *dp |= (png_byte)(v << dshift);
- if (dshift == s_end)
- {
- dshift = s_start;
- dp--;
- }
- else
- dshift += s_inc;
- }
- if (sshift == s_end)
- {
- sshift = s_start;
- sp--;
- }
- else
- sshift += s_inc;
- }
- break;
- }
-
- case 2:
- {
- png_bytep sp, dp;
- int sshift, dshift;
- int s_start, s_end, s_inc;
- png_uint_32 i;
-
- sp = row + (png_size_t)((row_info->width - 1) >> 2);
- dp = row + (png_size_t)((final_width - 1) >> 2);
-#if defined(PNG_READ_PACKSWAP_SUPPORTED)
- if (transformations & PNG_PACKSWAP)
- {
- sshift = (png_size_t)(((row_info->width + 3) & 3) << 1);
- dshift = (png_size_t)(((final_width + 3) & 3) << 1);
- s_start = 6;
- s_end = 0;
- s_inc = -2;
- }
- else
-#endif
- {
- sshift = (png_size_t)((3 - ((row_info->width + 3) & 3)) << 1);
- dshift = (png_size_t)((3 - ((final_width + 3) & 3)) << 1);
- s_start = 0;
- s_end = 6;
- s_inc = 2;
- }
-
- for (i = row_info->width; i; i--)
- {
- png_byte v;
- int j;
-
- v = (png_byte)((*sp >> sshift) & 0x3);
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- *dp &= (png_byte)((0x3f3f >> (6 - dshift)) & 0xff);
- *dp |= (png_byte)(v << dshift);
- if (dshift == s_end)
- {
- dshift = s_start;
- dp--;
- }
- else
- dshift += s_inc;
- }
- if (sshift == s_end)
- {
- sshift = s_start;
- sp--;
- }
- else
- sshift += s_inc;
- }
- break;
- }
-
- case 4:
- {
- png_bytep sp, dp;
- int sshift, dshift;
- int s_start, s_end, s_inc;
- png_uint_32 i;
-
- sp = row + (png_size_t)((row_info->width - 1) >> 1);
- dp = row + (png_size_t)((final_width - 1) >> 1);
-#if defined(PNG_READ_PACKSWAP_SUPPORTED)
- if (transformations & PNG_PACKSWAP)
- {
- sshift = (png_size_t)(((row_info->width + 1) & 1) << 2);
- dshift = (png_size_t)(((final_width + 1) & 1) << 2);
- s_start = 4;
- s_end = 0;
- s_inc = -4;
- }
- else
-#endif
- {
- sshift = (png_size_t)((1 - ((row_info->width + 1) & 1)) << 2);
- dshift = (png_size_t)((1 - ((final_width + 1) & 1)) << 2);
- s_start = 0;
- s_end = 4;
- s_inc = 4;
- }
-
- for (i = row_info->width; i; i--)
- {
- png_byte v;
- int j;
-
- v = (png_byte)((*sp >> sshift) & 0xf);
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- *dp &= (png_byte)((0xf0f >> (4 - dshift)) & 0xff);
- *dp |= (png_byte)(v << dshift);
- if (dshift == s_end)
- {
- dshift = s_start;
- dp--;
- }
- else
- dshift += s_inc;
- }
- if (sshift == s_end)
- {
- sshift = s_start;
- sp--;
- }
- else
- sshift += s_inc;
- }
- break;
- }
-
- /*====================================================================*/
-
- default: /* 8-bit or larger (this is where the routine is modified) */
- {
-#if 0
-// static unsigned long long _const4 = 0x0000000000FFFFFFLL; no good
-// static unsigned long long const4 = 0x0000000000FFFFFFLL; no good
-// unsigned long long _const4 = 0x0000000000FFFFFFLL; no good
-// unsigned long long const4 = 0x0000000000FFFFFFLL; no good
-#endif
- png_bytep sptr, dp;
- png_uint_32 i;
- png_size_t pixel_bytes;
- int width = (int)row_info->width;
-
- pixel_bytes = (row_info->pixel_depth >> 3);
-
- /* point sptr at the last pixel in the pre-expanded row: */
- sptr = row + (width - 1) * pixel_bytes;
-
- /* point dp at the last pixel position in the expanded row: */
- dp = row + (final_width - 1) * pixel_bytes;
-
- /* New code by Nirav Chhatrapati - Intel Corporation */
-
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
- if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_INTERLACE)
- /* && _mmx_supported */ )
- {
- //--------------------------------------------------------------
- if (pixel_bytes == 3)
- {
- if (((pass == 0) || (pass == 1)) && width)
- {
- int dummy_value_c; // fix 'forbidden register spilled'
- int dummy_value_S;
- int dummy_value_D;
-
- __asm__ __volatile__ (
- "subl $21, %%edi \n\t"
- // (png_pass_inc[pass] - 1)*pixel_bytes
-
- ".loop3_pass0: \n\t"
- "movd (%%esi), %%mm0 \n\t" // x x x x x 2 1 0
- "pand _const4, %%mm0 \n\t" // z z z z z 2 1 0
- "movq %%mm0, %%mm1 \n\t" // z z z z z 2 1 0
- "psllq $16, %%mm0 \n\t" // z z z 2 1 0 z z
- "movq %%mm0, %%mm2 \n\t" // z z z 2 1 0 z z
- "psllq $24, %%mm0 \n\t" // 2 1 0 z z z z z
- "psrlq $8, %%mm1 \n\t" // z z z z z z 2 1
- "por %%mm2, %%mm0 \n\t" // 2 1 0 2 1 0 z z
- "por %%mm1, %%mm0 \n\t" // 2 1 0 2 1 0 2 1
- "movq %%mm0, %%mm3 \n\t" // 2 1 0 2 1 0 2 1
- "psllq $16, %%mm0 \n\t" // 0 2 1 0 2 1 z z
- "movq %%mm3, %%mm4 \n\t" // 2 1 0 2 1 0 2 1
- "punpckhdq %%mm0, %%mm3 \n\t" // 0 2 1 0 2 1 0 2
- "movq %%mm4, 16(%%edi) \n\t"
- "psrlq $32, %%mm0 \n\t" // z z z z 0 2 1 0
- "movq %%mm3, 8(%%edi) \n\t"
- "punpckldq %%mm4, %%mm0 \n\t" // 1 0 2 1 0 2 1 0
- "subl $3, %%esi \n\t"
- "movq %%mm0, (%%edi) \n\t"
- "subl $24, %%edi \n\t"
- "decl %%ecx \n\t"
- "jnz .loop3_pass0 \n\t"
- "EMMS \n\t" // DONE
-
- : "=c" (dummy_value_c), // output regs (dummy)
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "1" (sptr), // esi // input regs
- "2" (dp), // edi
- "0" (width) // ecx
-// doesn't work "i" (0x0000000000FFFFFFLL) // %1 (a.k.a. _const4)
-
-#if 0 /* %mm0, ..., %mm4 not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0", "%mm1", "%mm2" // clobber list
- , "%mm3", "%mm4"
-#endif
- );
- }
- else if (((pass == 2) || (pass == 3)) && width)
- {
- int dummy_value_c; // fix 'forbidden register spilled'
- int dummy_value_S;
- int dummy_value_D;
-
- __asm__ __volatile__ (
- "subl $9, %%edi \n\t"
- // (png_pass_inc[pass] - 1)*pixel_bytes
-
- ".loop3_pass2: \n\t"
- "movd (%%esi), %%mm0 \n\t" // x x x x x 2 1 0
- "pand _const4, %%mm0 \n\t" // z z z z z 2 1 0
- "movq %%mm0, %%mm1 \n\t" // z z z z z 2 1 0
- "psllq $16, %%mm0 \n\t" // z z z 2 1 0 z z
- "movq %%mm0, %%mm2 \n\t" // z z z 2 1 0 z z
- "psllq $24, %%mm0 \n\t" // 2 1 0 z z z z z
- "psrlq $8, %%mm1 \n\t" // z z z z z z 2 1
- "por %%mm2, %%mm0 \n\t" // 2 1 0 2 1 0 z z
- "por %%mm1, %%mm0 \n\t" // 2 1 0 2 1 0 2 1
- "movq %%mm0, 4(%%edi) \n\t"
- "psrlq $16, %%mm0 \n\t" // z z 2 1 0 2 1 0
- "subl $3, %%esi \n\t"
- "movd %%mm0, (%%edi) \n\t"
- "subl $12, %%edi \n\t"
- "decl %%ecx \n\t"
- "jnz .loop3_pass2 \n\t"
- "EMMS \n\t" // DONE
-
- : "=c" (dummy_value_c), // output regs (dummy)
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "1" (sptr), // esi // input regs
- "2" (dp), // edi
- "0" (width) // ecx
-
-#if 0 /* %mm0, ..., %mm2 not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0", "%mm1", "%mm2" // clobber list
-#endif
- );
- }
- else if (width) /* && ((pass == 4) || (pass == 5)) */
- {
- int width_mmx = ((width >> 1) << 1) - 8; // GRR: huh?
- if (width_mmx < 0)
- width_mmx = 0;
- width -= width_mmx; // 8 or 9 pix, 24 or 27 bytes
- if (width_mmx)
- {
- // png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1};
- // sptr points at last pixel in pre-expanded row
- // dp points at last pixel position in expanded row
- int dummy_value_c; // fix 'forbidden register spilled'
- int dummy_value_S;
- int dummy_value_D;
-
- __asm__ __volatile__ (
- "subl $3, %%esi \n\t"
- "subl $9, %%edi \n\t"
- // (png_pass_inc[pass] + 1)*pixel_bytes
-
- ".loop3_pass4: \n\t"
- "movq (%%esi), %%mm0 \n\t" // x x 5 4 3 2 1 0
- "movq %%mm0, %%mm1 \n\t" // x x 5 4 3 2 1 0
- "movq %%mm0, %%mm2 \n\t" // x x 5 4 3 2 1 0
- "psllq $24, %%mm0 \n\t" // 4 3 2 1 0 z z z
- "pand _const4, %%mm1 \n\t" // z z z z z 2 1 0
- "psrlq $24, %%mm2 \n\t" // z z z x x 5 4 3
- "por %%mm1, %%mm0 \n\t" // 4 3 2 1 0 2 1 0
- "movq %%mm2, %%mm3 \n\t" // z z z x x 5 4 3
- "psllq $8, %%mm2 \n\t" // z z x x 5 4 3 z
- "movq %%mm0, (%%edi) \n\t"
- "psrlq $16, %%mm3 \n\t" // z z z z z x x 5
- "pand _const6, %%mm3 \n\t" // z z z z z z z 5
- "por %%mm3, %%mm2 \n\t" // z z x x 5 4 3 5
- "subl $6, %%esi \n\t"
- "movd %%mm2, 8(%%edi) \n\t"
- "subl $12, %%edi \n\t"
- "subl $2, %%ecx \n\t"
- "jnz .loop3_pass4 \n\t"
- "EMMS \n\t" // DONE
-
- : "=c" (dummy_value_c), // output regs (dummy)
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "1" (sptr), // esi // input regs
- "2" (dp), // edi
- "0" (width_mmx) // ecx
-
-#if 0 /* %mm0, ..., %mm3 not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0", "%mm1" // clobber list
- , "%mm2", "%mm3"
-#endif
- );
- }
-
- sptr -= width_mmx*3;
- dp -= width_mmx*6;
- for (i = width; i; i--)
- {
- png_byte v[8];
- int j;
-
- png_memcpy(v, sptr, 3);
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- png_memcpy(dp, v, 3);
- dp -= 3;
- }
- sptr -= 3;
- }
- }
- } /* end of pixel_bytes == 3 */
-
- //--------------------------------------------------------------
- else if (pixel_bytes == 1)
- {
- if (((pass == 0) || (pass == 1)) && width)
- {
- int width_mmx = ((width >> 2) << 2);
- width -= width_mmx; // 0-3 pixels => 0-3 bytes
- if (width_mmx)
- {
- int dummy_value_c; // fix 'forbidden register spilled'
- int dummy_value_S;
- int dummy_value_D;
-
- __asm__ __volatile__ (
- "subl $3, %%esi \n\t"
- "subl $31, %%edi \n\t"
-
- ".loop1_pass0: \n\t"
- "movd (%%esi), %%mm0 \n\t" // x x x x 3 2 1 0
- "movq %%mm0, %%mm1 \n\t" // x x x x 3 2 1 0
- "punpcklbw %%mm0, %%mm0 \n\t" // 3 3 2 2 1 1 0 0
- "movq %%mm0, %%mm2 \n\t" // 3 3 2 2 1 1 0 0
- "punpcklwd %%mm0, %%mm0 \n\t" // 1 1 1 1 0 0 0 0
- "movq %%mm0, %%mm3 \n\t" // 1 1 1 1 0 0 0 0
- "punpckldq %%mm0, %%mm0 \n\t" // 0 0 0 0 0 0 0 0
- "punpckhdq %%mm3, %%mm3 \n\t" // 1 1 1 1 1 1 1 1
- "movq %%mm0, (%%edi) \n\t"
- "punpckhwd %%mm2, %%mm2 \n\t" // 3 3 3 3 2 2 2 2
- "movq %%mm3, 8(%%edi) \n\t"
- "movq %%mm2, %%mm4 \n\t" // 3 3 3 3 2 2 2 2
- "punpckldq %%mm2, %%mm2 \n\t" // 2 2 2 2 2 2 2 2
- "punpckhdq %%mm4, %%mm4 \n\t" // 3 3 3 3 3 3 3 3
- "movq %%mm2, 16(%%edi) \n\t"
- "subl $4, %%esi \n\t"
- "movq %%mm4, 24(%%edi) \n\t"
- "subl $32, %%edi \n\t"
- "subl $4, %%ecx \n\t"
- "jnz .loop1_pass0 \n\t"
- "EMMS \n\t" // DONE
-
- : "=c" (dummy_value_c), // output regs (dummy)
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "1" (sptr), // esi // input regs
- "2" (dp), // edi
- "0" (width_mmx) // ecx
-
-#if 0 /* %mm0, ..., %mm4 not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0", "%mm1", "%mm2" // clobber list
- , "%mm3", "%mm4"
-#endif
- );
- }
-
- sptr -= width_mmx;
- dp -= width_mmx*8;
- for (i = width; i; i--)
- {
- int j;
-
- /* I simplified this part in version 1.0.4e
- * here and in several other instances where
- * pixel_bytes == 1 -- GR-P
- *
- * Original code:
- *
- * png_byte v[8];
- * png_memcpy(v, sptr, pixel_bytes);
- * for (j = 0; j < png_pass_inc[pass]; j++)
- * {
- * png_memcpy(dp, v, pixel_bytes);
- * dp -= pixel_bytes;
- * }
- * sptr -= pixel_bytes;
- *
- * Replacement code is in the next three lines:
- */
-
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- *dp-- = *sptr;
- }
- --sptr;
- }
- }
- else if (((pass == 2) || (pass == 3)) && width)
- {
- int width_mmx = ((width >> 2) << 2);
- width -= width_mmx; // 0-3 pixels => 0-3 bytes
- if (width_mmx)
- {
- int dummy_value_c; // fix 'forbidden register spilled'
- int dummy_value_S;
- int dummy_value_D;
-
- __asm__ __volatile__ (
- "subl $3, %%esi \n\t"
- "subl $15, %%edi \n\t"
-
- ".loop1_pass2: \n\t"
- "movd (%%esi), %%mm0 \n\t" // x x x x 3 2 1 0
- "punpcklbw %%mm0, %%mm0 \n\t" // 3 3 2 2 1 1 0 0
- "movq %%mm0, %%mm1 \n\t" // 3 3 2 2 1 1 0 0
- "punpcklwd %%mm0, %%mm0 \n\t" // 1 1 1 1 0 0 0 0
- "punpckhwd %%mm1, %%mm1 \n\t" // 3 3 3 3 2 2 2 2
- "movq %%mm0, (%%edi) \n\t"
- "subl $4, %%esi \n\t"
- "movq %%mm1, 8(%%edi) \n\t"
- "subl $16, %%edi \n\t"
- "subl $4, %%ecx \n\t"
- "jnz .loop1_pass2 \n\t"
- "EMMS \n\t" // DONE
-
- : "=c" (dummy_value_c), // output regs (dummy)
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "1" (sptr), // esi // input regs
- "2" (dp), // edi
- "0" (width_mmx) // ecx
-
-#if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0", "%mm1" // clobber list
-#endif
- );
- }
-
- sptr -= width_mmx;
- dp -= width_mmx*4;
- for (i = width; i; i--)
- {
- int j;
-
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- *dp-- = *sptr;
- }
- --sptr;
- }
- }
- else if (width) /* && ((pass == 4) || (pass == 5)) */
- {
- int width_mmx = ((width >> 3) << 3);
- width -= width_mmx; // 0-3 pixels => 0-3 bytes
- if (width_mmx)
- {
- int dummy_value_c; // fix 'forbidden register spilled'
- int dummy_value_S;
- int dummy_value_D;
-
- __asm__ __volatile__ (
- "subl $7, %%esi \n\t"
- "subl $15, %%edi \n\t"
-
- ".loop1_pass4: \n\t"
- "movq (%%esi), %%mm0 \n\t" // 7 6 5 4 3 2 1 0
- "movq %%mm0, %%mm1 \n\t" // 7 6 5 4 3 2 1 0
- "punpcklbw %%mm0, %%mm0 \n\t" // 3 3 2 2 1 1 0 0
- "punpckhbw %%mm1, %%mm1 \n\t" // 7 7 6 6 5 5 4 4
- "movq %%mm1, 8(%%edi) \n\t"
- "subl $8, %%esi \n\t"
- "movq %%mm0, (%%edi) \n\t"
- "subl $16, %%edi \n\t"
- "subl $8, %%ecx \n\t"
- "jnz .loop1_pass4 \n\t"
- "EMMS \n\t" // DONE
-
- : "=c" (dummy_value_c), // output regs (none)
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "1" (sptr), // esi // input regs
- "2" (dp), // edi
- "0" (width_mmx) // ecx
-
-#if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0", "%mm1" // clobber list
-#endif
- );
- }
-
- sptr -= width_mmx;
- dp -= width_mmx*2;
- for (i = width; i; i--)
- {
- int j;
-
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- *dp-- = *sptr;
- }
- --sptr;
- }
- }
- } /* end of pixel_bytes == 1 */
-
- //--------------------------------------------------------------
- else if (pixel_bytes == 2)
- {
- if (((pass == 0) || (pass == 1)) && width)
- {
- int width_mmx = ((width >> 1) << 1);
- width -= width_mmx; // 0,1 pixels => 0,2 bytes
- if (width_mmx)
- {
- int dummy_value_c; // fix 'forbidden register spilled'
- int dummy_value_S;
- int dummy_value_D;
-
- __asm__ __volatile__ (
- "subl $2, %%esi \n\t"
- "subl $30, %%edi \n\t"
-
- ".loop2_pass0: \n\t"
- "movd (%%esi), %%mm0 \n\t" // x x x x 3 2 1 0
- "punpcklwd %%mm0, %%mm0 \n\t" // 3 2 3 2 1 0 1 0
- "movq %%mm0, %%mm1 \n\t" // 3 2 3 2 1 0 1 0
- "punpckldq %%mm0, %%mm0 \n\t" // 1 0 1 0 1 0 1 0
- "punpckhdq %%mm1, %%mm1 \n\t" // 3 2 3 2 3 2 3 2
- "movq %%mm0, (%%edi) \n\t"
- "movq %%mm0, 8(%%edi) \n\t"
- "movq %%mm1, 16(%%edi) \n\t"
- "subl $4, %%esi \n\t"
- "movq %%mm1, 24(%%edi) \n\t"
- "subl $32, %%edi \n\t"
- "subl $2, %%ecx \n\t"
- "jnz .loop2_pass0 \n\t"
- "EMMS \n\t" // DONE
-
- : "=c" (dummy_value_c), // output regs (dummy)
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "1" (sptr), // esi // input regs
- "2" (dp), // edi
- "0" (width_mmx) // ecx
-
-#if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0", "%mm1" // clobber list
-#endif
- );
- }
-
- sptr -= (width_mmx*2 - 2); // sign fixed
- dp -= (width_mmx*16 - 2); // sign fixed
- for (i = width; i; i--)
- {
- png_byte v[8];
- int j;
- sptr -= 2;
- png_memcpy(v, sptr, 2);
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- dp -= 2;
- png_memcpy(dp, v, 2);
- }
- }
- }
- else if (((pass == 2) || (pass == 3)) && width)
- {
- int width_mmx = ((width >> 1) << 1) ;
- width -= width_mmx; // 0,1 pixels => 0,2 bytes
- if (width_mmx)
- {
- int dummy_value_c; // fix 'forbidden register spilled'
- int dummy_value_S;
- int dummy_value_D;
-
- __asm__ __volatile__ (
- "subl $2, %%esi \n\t"
- "subl $14, %%edi \n\t"
-
- ".loop2_pass2: \n\t"
- "movd (%%esi), %%mm0 \n\t" // x x x x 3 2 1 0
- "punpcklwd %%mm0, %%mm0 \n\t" // 3 2 3 2 1 0 1 0
- "movq %%mm0, %%mm1 \n\t" // 3 2 3 2 1 0 1 0
- "punpckldq %%mm0, %%mm0 \n\t" // 1 0 1 0 1 0 1 0
- "punpckhdq %%mm1, %%mm1 \n\t" // 3 2 3 2 3 2 3 2
- "movq %%mm0, (%%edi) \n\t"
- "subl $4, %%esi \n\t"
- "movq %%mm1, 8(%%edi) \n\t"
- "subl $16, %%edi \n\t"
- "subl $2, %%ecx \n\t"
- "jnz .loop2_pass2 \n\t"
- "EMMS \n\t" // DONE
-
- : "=c" (dummy_value_c), // output regs (dummy)
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "1" (sptr), // esi // input regs
- "2" (dp), // edi
- "0" (width_mmx) // ecx
-
-#if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0", "%mm1" // clobber list
-#endif
- );
- }
-
- sptr -= (width_mmx*2 - 2); // sign fixed
- dp -= (width_mmx*8 - 2); // sign fixed
- for (i = width; i; i--)
- {
- png_byte v[8];
- int j;
- sptr -= 2;
- png_memcpy(v, sptr, 2);
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- dp -= 2;
- png_memcpy(dp, v, 2);
- }
- }
- }
- else if (width) // pass == 4 or 5
- {
- int width_mmx = ((width >> 1) << 1) ;
- width -= width_mmx; // 0,1 pixels => 0,2 bytes
- if (width_mmx)
- {
- int dummy_value_c; // fix 'forbidden register spilled'
- int dummy_value_S;
- int dummy_value_D;
-
- __asm__ __volatile__ (
- "subl $2, %%esi \n\t"
- "subl $6, %%edi \n\t"
-
- ".loop2_pass4: \n\t"
- "movd (%%esi), %%mm0 \n\t" // x x x x 3 2 1 0
- "punpcklwd %%mm0, %%mm0 \n\t" // 3 2 3 2 1 0 1 0
- "subl $4, %%esi \n\t"
- "movq %%mm0, (%%edi) \n\t"
- "subl $8, %%edi \n\t"
- "subl $2, %%ecx \n\t"
- "jnz .loop2_pass4 \n\t"
- "EMMS \n\t" // DONE
-
- : "=c" (dummy_value_c), // output regs (dummy)
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "1" (sptr), // esi // input regs
- "2" (dp), // edi
- "0" (width_mmx) // ecx
-
-#if 0 /* %mm0 not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0" // clobber list
-#endif
- );
- }
-
- sptr -= (width_mmx*2 - 2); // sign fixed
- dp -= (width_mmx*4 - 2); // sign fixed
- for (i = width; i; i--)
- {
- png_byte v[8];
- int j;
- sptr -= 2;
- png_memcpy(v, sptr, 2);
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- dp -= 2;
- png_memcpy(dp, v, 2);
- }
- }
- }
- } /* end of pixel_bytes == 2 */
-
- //--------------------------------------------------------------
- else if (pixel_bytes == 4)
- {
- if (((pass == 0) || (pass == 1)) && width)
- {
- int width_mmx = ((width >> 1) << 1);
- width -= width_mmx; // 0,1 pixels => 0,4 bytes
- if (width_mmx)
- {
- int dummy_value_c; // fix 'forbidden register spilled'
- int dummy_value_S;
- int dummy_value_D;
-
- __asm__ __volatile__ (
- "subl $4, %%esi \n\t"
- "subl $60, %%edi \n\t"
-
- ".loop4_pass0: \n\t"
- "movq (%%esi), %%mm0 \n\t" // 7 6 5 4 3 2 1 0
- "movq %%mm0, %%mm1 \n\t" // 7 6 5 4 3 2 1 0
- "punpckldq %%mm0, %%mm0 \n\t" // 3 2 1 0 3 2 1 0
- "punpckhdq %%mm1, %%mm1 \n\t" // 7 6 5 4 7 6 5 4
- "movq %%mm0, (%%edi) \n\t"
- "movq %%mm0, 8(%%edi) \n\t"
- "movq %%mm0, 16(%%edi) \n\t"
- "movq %%mm0, 24(%%edi) \n\t"
- "movq %%mm1, 32(%%edi) \n\t"
- "movq %%mm1, 40(%%edi) \n\t"
- "movq %%mm1, 48(%%edi) \n\t"
- "subl $8, %%esi \n\t"
- "movq %%mm1, 56(%%edi) \n\t"
- "subl $64, %%edi \n\t"
- "subl $2, %%ecx \n\t"
- "jnz .loop4_pass0 \n\t"
- "EMMS \n\t" // DONE
-
- : "=c" (dummy_value_c), // output regs (dummy)
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "1" (sptr), // esi // input regs
- "2" (dp), // edi
- "0" (width_mmx) // ecx
-
-#if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0", "%mm1" // clobber list
-#endif
- );
- }
-
- sptr -= (width_mmx*4 - 4); // sign fixed
- dp -= (width_mmx*32 - 4); // sign fixed
- for (i = width; i; i--)
- {
- png_byte v[8];
- int j;
- sptr -= 4;
- png_memcpy(v, sptr, 4);
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- dp -= 4;
- png_memcpy(dp, v, 4);
- }
- }
- }
- else if (((pass == 2) || (pass == 3)) && width)
- {
- int width_mmx = ((width >> 1) << 1);
- width -= width_mmx; // 0,1 pixels => 0,4 bytes
- if (width_mmx)
- {
- int dummy_value_c; // fix 'forbidden register spilled'
- int dummy_value_S;
- int dummy_value_D;
-
- __asm__ __volatile__ (
- "subl $4, %%esi \n\t"
- "subl $28, %%edi \n\t"
-
- ".loop4_pass2: \n\t"
- "movq (%%esi), %%mm0 \n\t" // 7 6 5 4 3 2 1 0
- "movq %%mm0, %%mm1 \n\t" // 7 6 5 4 3 2 1 0
- "punpckldq %%mm0, %%mm0 \n\t" // 3 2 1 0 3 2 1 0
- "punpckhdq %%mm1, %%mm1 \n\t" // 7 6 5 4 7 6 5 4
- "movq %%mm0, (%%edi) \n\t"
- "movq %%mm0, 8(%%edi) \n\t"
- "movq %%mm1, 16(%%edi) \n\t"
- "movq %%mm1, 24(%%edi) \n\t"
- "subl $8, %%esi \n\t"
- "subl $32, %%edi \n\t"
- "subl $2, %%ecx \n\t"
- "jnz .loop4_pass2 \n\t"
- "EMMS \n\t" // DONE
-
- : "=c" (dummy_value_c), // output regs (dummy)
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "1" (sptr), // esi // input regs
- "2" (dp), // edi
- "0" (width_mmx) // ecx
-
-#if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0", "%mm1" // clobber list
-#endif
- );
- }
-
- sptr -= (width_mmx*4 - 4); // sign fixed
- dp -= (width_mmx*16 - 4); // sign fixed
- for (i = width; i; i--)
- {
- png_byte v[8];
- int j;
- sptr -= 4;
- png_memcpy(v, sptr, 4);
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- dp -= 4;
- png_memcpy(dp, v, 4);
- }
- }
- }
- else if (width) // pass == 4 or 5
- {
- int width_mmx = ((width >> 1) << 1) ;
- width -= width_mmx; // 0,1 pixels => 0,4 bytes
- if (width_mmx)
- {
- int dummy_value_c; // fix 'forbidden register spilled'
- int dummy_value_S;
- int dummy_value_D;
-
- __asm__ __volatile__ (
- "subl $4, %%esi \n\t"
- "subl $12, %%edi \n\t"
-
- ".loop4_pass4: \n\t"
- "movq (%%esi), %%mm0 \n\t" // 7 6 5 4 3 2 1 0
- "movq %%mm0, %%mm1 \n\t" // 7 6 5 4 3 2 1 0
- "punpckldq %%mm0, %%mm0 \n\t" // 3 2 1 0 3 2 1 0
- "punpckhdq %%mm1, %%mm1 \n\t" // 7 6 5 4 7 6 5 4
- "movq %%mm0, (%%edi) \n\t"
- "subl $8, %%esi \n\t"
- "movq %%mm1, 8(%%edi) \n\t"
- "subl $16, %%edi \n\t"
- "subl $2, %%ecx \n\t"
- "jnz .loop4_pass4 \n\t"
- "EMMS \n\t" // DONE
-
- : "=c" (dummy_value_c), // output regs (dummy)
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "1" (sptr), // esi // input regs
- "2" (dp), // edi
- "0" (width_mmx) // ecx
-
-#if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0", "%mm1" // clobber list
-#endif
- );
- }
-
- sptr -= (width_mmx*4 - 4); // sign fixed
- dp -= (width_mmx*8 - 4); // sign fixed
- for (i = width; i; i--)
- {
- png_byte v[8];
- int j;
- sptr -= 4;
- png_memcpy(v, sptr, 4);
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- dp -= 4;
- png_memcpy(dp, v, 4);
- }
- }
- }
- } /* end of pixel_bytes == 4 */
-
- //--------------------------------------------------------------
- else if (pixel_bytes == 8)
- {
-// GRR TEST: should work, but needs testing (special 64-bit version of rpng2?)
- // GRR NOTE: no need to combine passes here!
- if (((pass == 0) || (pass == 1)) && width)
- {
- int dummy_value_c; // fix 'forbidden register spilled'
- int dummy_value_S;
- int dummy_value_D;
-
- // source is 8-byte RRGGBBAA
- // dest is 64-byte RRGGBBAA RRGGBBAA RRGGBBAA RRGGBBAA ...
- __asm__ __volatile__ (
- "subl $56, %%edi \n\t" // start of last block
-
- ".loop8_pass0: \n\t"
- "movq (%%esi), %%mm0 \n\t" // 7 6 5 4 3 2 1 0
- "movq %%mm0, (%%edi) \n\t"
- "movq %%mm0, 8(%%edi) \n\t"
- "movq %%mm0, 16(%%edi) \n\t"
- "movq %%mm0, 24(%%edi) \n\t"
- "movq %%mm0, 32(%%edi) \n\t"
- "movq %%mm0, 40(%%edi) \n\t"
- "movq %%mm0, 48(%%edi) \n\t"
- "subl $8, %%esi \n\t"
- "movq %%mm0, 56(%%edi) \n\t"
- "subl $64, %%edi \n\t"
- "decl %%ecx \n\t"
- "jnz .loop8_pass0 \n\t"
- "EMMS \n\t" // DONE
-
- : "=c" (dummy_value_c), // output regs (dummy)
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "1" (sptr), // esi // input regs
- "2" (dp), // edi
- "0" (width) // ecx
-
-#if 0 /* %mm0 not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0" // clobber list
-#endif
- );
- }
- else if (((pass == 2) || (pass == 3)) && width)
- {
- // source is 8-byte RRGGBBAA
- // dest is 32-byte RRGGBBAA RRGGBBAA RRGGBBAA RRGGBBAA
- int width_mmx = ((width >> 1) << 1) ;
- width -= width_mmx;
- if (width_mmx)
- {
- int dummy_value_c; // fix 'forbidden register spilled'
- int dummy_value_S;
- int dummy_value_D;
-
- __asm__ __volatile__ (
- "subl $24, %%edi \n\t" // start of last block
-
- ".loop8_pass2: \n\t"
- "movq (%%esi), %%mm0 \n\t" // 7 6 5 4 3 2 1 0
- "movq %%mm0, (%%edi) \n\t"
- "movq %%mm0, 8(%%edi) \n\t"
- "movq %%mm0, 16(%%edi) \n\t"
- "subl $8, %%esi \n\t"
- "movq %%mm0, 24(%%edi) \n\t"
- "subl $32, %%edi \n\t"
- "decl %%ecx \n\t"
- "jnz .loop8_pass2 \n\t"
- "EMMS \n\t" // DONE
-
- : "=c" (dummy_value_c), // output regs (dummy)
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "1" (sptr), // esi // input regs
- "2" (dp), // edi
- "0" (width) // ecx
-
-#if 0 /* %mm0 not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0" // clobber list
-#endif
- );
- }
- }
- else if (width) // pass == 4 or 5
- {
- // source is 8-byte RRGGBBAA
- // dest is 16-byte RRGGBBAA RRGGBBAA
- int width_mmx = ((width >> 1) << 1) ;
- width -= width_mmx;
- if (width_mmx)
- {
- int dummy_value_c; // fix 'forbidden register spilled'
- int dummy_value_S;
- int dummy_value_D;
-
- __asm__ __volatile__ (
- "subl $8, %%edi \n\t" // start of last block
-
- ".loop8_pass4: \n\t"
- "movq (%%esi), %%mm0 \n\t" // 7 6 5 4 3 2 1 0
- "movq %%mm0, (%%edi) \n\t"
- "subl $8, %%esi \n\t"
- "movq %%mm0, 8(%%edi) \n\t"
- "subl $16, %%edi \n\t"
- "decl %%ecx \n\t"
- "jnz .loop8_pass4 \n\t"
- "EMMS \n\t" // DONE
-
- : "=c" (dummy_value_c), // output regs (dummy)
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "1" (sptr), // esi // input regs
- "2" (dp), // edi
- "0" (width) // ecx
-
-#if 0 /* %mm0 not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0" // clobber list
-#endif
- );
- }
- }
-
- } /* end of pixel_bytes == 8 */
-
- //--------------------------------------------------------------
- else if (pixel_bytes == 6)
- {
- for (i = width; i; i--)
- {
- png_byte v[8];
- int j;
- png_memcpy(v, sptr, 6);
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- png_memcpy(dp, v, 6);
- dp -= 6;
- }
- sptr -= 6;
- }
- } /* end of pixel_bytes == 6 */
-
- //--------------------------------------------------------------
- else
- {
- for (i = width; i; i--)
- {
- png_byte v[8];
- int j;
- png_memcpy(v, sptr, pixel_bytes);
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- png_memcpy(dp, v, pixel_bytes);
- dp -= pixel_bytes;
- }
- sptr-= pixel_bytes;
- }
- }
- } // end of _mmx_supported ========================================
-
- else /* MMX not supported: use modified C code - takes advantage
- * of inlining of png_memcpy for a constant */
- /* GRR 19991007: does it? or should pixel_bytes in each
- * block be replaced with immediate value (e.g., 1)? */
- /* GRR 19991017: replaced with constants in each case */
-#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
- {
- if (pixel_bytes == 1)
- {
- for (i = width; i; i--)
- {
- int j;
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- *dp-- = *sptr;
- }
- --sptr;
- }
- }
- else if (pixel_bytes == 3)
- {
- for (i = width; i; i--)
- {
- png_byte v[8];
- int j;
- png_memcpy(v, sptr, 3);
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- png_memcpy(dp, v, 3);
- dp -= 3;
- }
- sptr -= 3;
- }
- }
- else if (pixel_bytes == 2)
- {
- for (i = width; i; i--)
- {
- png_byte v[8];
- int j;
- png_memcpy(v, sptr, 2);
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- png_memcpy(dp, v, 2);
- dp -= 2;
- }
- sptr -= 2;
- }
- }
- else if (pixel_bytes == 4)
- {
- for (i = width; i; i--)
- {
- png_byte v[8];
- int j;
- png_memcpy(v, sptr, 4);
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
-#ifdef PNG_DEBUG
- if (dp < row || dp+3 > row+png_ptr->row_buf_size)
- {
- printf("dp out of bounds: row=%d, dp=%d, rp=%d\n",
- row, dp, row+png_ptr->row_buf_size);
- printf("row_buf=%d\n",png_ptr->row_buf_size);
- }
-#endif
- png_memcpy(dp, v, 4);
- dp -= 4;
- }
- sptr -= 4;
- }
- }
- else if (pixel_bytes == 6)
- {
- for (i = width; i; i--)
- {
- png_byte v[8];
- int j;
- png_memcpy(v, sptr, 6);
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- png_memcpy(dp, v, 6);
- dp -= 6;
- }
- sptr -= 6;
- }
- }
- else if (pixel_bytes == 8)
- {
- for (i = width; i; i--)
- {
- png_byte v[8];
- int j;
- png_memcpy(v, sptr, 8);
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- png_memcpy(dp, v, 8);
- dp -= 8;
- }
- sptr -= 8;
- }
- }
- else /* GRR: should never be reached */
- {
- for (i = width; i; i--)
- {
- png_byte v[8];
- int j;
- png_memcpy(v, sptr, pixel_bytes);
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- png_memcpy(dp, v, pixel_bytes);
- dp -= pixel_bytes;
- }
- sptr -= pixel_bytes;
- }
- }
-
- } /* end if (MMX not supported) */
- break;
- }
- } /* end switch (row_info->pixel_depth) */
-
- row_info->width = final_width;
- row_info->rowbytes = ((final_width *
- (png_uint_32)row_info->pixel_depth + 7) >> 3);
- }
-
-} /* end png_do_read_interlace() */
-
-#endif /* PNG_HAVE_ASSEMBLER_READ_INTERLACE */
-#endif /* PNG_READ_INTERLACING_SUPPORTED */
-
-
-
-#if defined(PNG_HAVE_ASSEMBLER_READ_FILTER_ROW)
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
-
-// These variables are utilized in the functions below. They are declared
-// globally here to ensure alignment on 8-byte boundaries.
-
-union uAll {
- long long use;
- double align;
-} _LBCarryMask = {0x0101010101010101LL},
- _HBClearMask = {0x7f7f7f7f7f7f7f7fLL},
- _ActiveMask, _ActiveMask2, _ActiveMaskEnd, _ShiftBpp, _ShiftRem;
-
-#ifdef PNG_THREAD_UNSAFE_OK
-//===========================================================================//
-// //
-// P N G _ R E A D _ F I L T E R _ R O W _ M M X _ A V G //
-// //
-//===========================================================================//
-
-// Optimized code for PNG Average filter decoder
-
-static void /* PRIVATE */
-png_read_filter_row_mmx_avg(png_row_infop row_info, png_bytep row,
- png_bytep prev_row)
-{
- int bpp;
- int dummy_value_c; // fix 'forbidden register 2 (cx) was spilled' error
- int dummy_value_S;
- int dummy_value_D;
-
- bpp = (row_info->pixel_depth + 7) >> 3; // get # bytes per pixel
- _FullLength = row_info->rowbytes; // # of bytes to filter
-
- __asm__ __volatile__ (
- // initialize address pointers and offset
-#ifdef __PIC__
- "pushl %%ebx \n\t" // save index to Global Offset Table
-#endif
-//pre "movl row, %%edi \n\t" // edi: Avg(x)
- "xorl %%ebx, %%ebx \n\t" // ebx: x
- "movl %%edi, %%edx \n\t"
-//pre "movl prev_row, %%esi \n\t" // esi: Prior(x)
-//pre "subl bpp, %%edx \n\t" // (bpp is preloaded into ecx)
- "subl %%ecx, %%edx \n\t" // edx: Raw(x-bpp)
-
- "xorl %%eax,%%eax \n\t"
-
- // Compute the Raw value for the first bpp bytes
- // Raw(x) = Avg(x) + (Prior(x)/2)
- "avg_rlp: \n\t"
- "movb (%%esi,%%ebx,),%%al \n\t" // load al with Prior(x)
- "incl %%ebx \n\t"
- "shrb %%al \n\t" // divide by 2
- "addb -1(%%edi,%%ebx,),%%al \n\t" // add Avg(x); -1 to offset inc ebx
-//pre "cmpl bpp, %%ebx \n\t" // (bpp is preloaded into ecx)
- "cmpl %%ecx, %%ebx \n\t"
- "movb %%al,-1(%%edi,%%ebx,) \n\t" // write Raw(x); -1 to offset inc ebx
- "jb avg_rlp \n\t" // mov does not affect flags
-
- // get # of bytes to alignment
- "movl %%edi, _dif \n\t" // take start of row
- "addl %%ebx, _dif \n\t" // add bpp
- "addl $0xf, _dif \n\t" // add 7+8 to incr past alignment bdry
- "andl $0xfffffff8, _dif \n\t" // mask to alignment boundary
- "subl %%edi, _dif \n\t" // subtract from start => value ebx at
- "jz avg_go \n\t" // alignment
-
- // fix alignment
- // Compute the Raw value for the bytes up to the alignment boundary
- // Raw(x) = Avg(x) + ((Raw(x-bpp) + Prior(x))/2)
- "xorl %%ecx, %%ecx \n\t"
-
- "avg_lp1: \n\t"
- "xorl %%eax, %%eax \n\t"
- "movb (%%esi,%%ebx,), %%cl \n\t" // load cl with Prior(x)
- "movb (%%edx,%%ebx,), %%al \n\t" // load al with Raw(x-bpp)
- "addw %%cx, %%ax \n\t"
- "incl %%ebx \n\t"
- "shrw %%ax \n\t" // divide by 2
- "addb -1(%%edi,%%ebx,), %%al \n\t" // add Avg(x); -1 to offset inc ebx
- "cmpl _dif, %%ebx \n\t" // check if at alignment boundary
- "movb %%al, -1(%%edi,%%ebx,) \n\t" // write Raw(x); -1 to offset inc ebx
- "jb avg_lp1 \n\t" // repeat until at alignment boundary
-
- "avg_go: \n\t"
- "movl _FullLength, %%eax \n\t"
- "movl %%eax, %%ecx \n\t"
- "subl %%ebx, %%eax \n\t" // subtract alignment fix
- "andl $0x00000007, %%eax \n\t" // calc bytes over mult of 8
- "subl %%eax, %%ecx \n\t" // drop over bytes from original length
- "movl %%ecx, _MMXLength \n\t"
-#ifdef __PIC__
- "popl %%ebx \n\t" // restore index to Global Offset Table
-#endif
-
- : "=c" (dummy_value_c), // output regs (dummy)
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "0" (bpp), // ecx // input regs
- "1" (prev_row), // esi
- "2" (row) // edi
-
- : "%eax", "%edx" // clobber list
-#ifndef __PIC__
- , "%ebx"
-#endif
- // GRR: INCLUDE "memory" as clobbered? (_dif, _MMXLength)
- // (seems to work fine without...)
- );
-
- // now do the math for the rest of the row
- switch (bpp)
- {
- case 3:
- {
- _ActiveMask.use = 0x0000000000ffffffLL;
- _ShiftBpp.use = 24; // == 3 * 8
- _ShiftRem.use = 40; // == 64 - 24
-
- __asm__ __volatile__ (
- // re-init address pointers and offset
- "movq _ActiveMask, %%mm7 \n\t"
- "movl _dif, %%ecx \n\t" // ecx: x = offset to
- "movq _LBCarryMask, %%mm5 \n\t" // alignment boundary
-// preload "movl row, %%edi \n\t" // edi: Avg(x)
- "movq _HBClearMask, %%mm4 \n\t"
-// preload "movl prev_row, %%esi \n\t" // esi: Prior(x)
-
- // prime the pump: load the first Raw(x-bpp) data set
- "movq -8(%%edi,%%ecx,), %%mm2 \n\t" // load previous aligned 8 bytes
- // (correct pos. in loop below)
- "avg_3lp: \n\t"
- "movq (%%edi,%%ecx,), %%mm0 \n\t" // load mm0 with Avg(x)
- "movq %%mm5, %%mm3 \n\t"
- "psrlq _ShiftRem, %%mm2 \n\t" // correct position Raw(x-bpp)
- // data
- "movq (%%esi,%%ecx,), %%mm1 \n\t" // load mm1 with Prior(x)
- "movq %%mm7, %%mm6 \n\t"
- "pand %%mm1, %%mm3 \n\t" // get lsb for each prev_row byte
- "psrlq $1, %%mm1 \n\t" // divide prev_row bytes by 2
- "pand %%mm4, %%mm1 \n\t" // clear invalid bit 7 of each
- // byte
- "paddb %%mm1, %%mm0 \n\t" // add (Prev_row/2) to Avg for
- // each byte
- // add 1st active group (Raw(x-bpp)/2) to average with LBCarry
- "movq %%mm3, %%mm1 \n\t" // now use mm1 for getting
- // LBCarrys
- "pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte
- // where both
- // lsb's were == 1 (only valid for active group)
- "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2
- "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each
- // byte
- "paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2)
- // for each byte
- "pand %%mm6, %%mm2 \n\t" // leave only Active Group 1
- // bytes to add to Avg
- "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to
- // Avg for each Active
- // byte
- // add 2nd active group (Raw(x-bpp)/2) to average with _LBCarry
- "psllq _ShiftBpp, %%mm6 \n\t" // shift the mm6 mask to cover
- // bytes 3-5
- "movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2
- "psllq _ShiftBpp, %%mm2 \n\t" // shift data to pos. correctly
- "movq %%mm3, %%mm1 \n\t" // now use mm1 for getting
- // LBCarrys
- "pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte
- // where both
- // lsb's were == 1 (only valid for active group)
- "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2
- "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each
- // byte
- "paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2)
- // for each byte
- "pand %%mm6, %%mm2 \n\t" // leave only Active Group 2
- // bytes to add to Avg
- "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to
- // Avg for each Active
- // byte
-
- // add 3rd active group (Raw(x-bpp)/2) to average with _LBCarry
- "psllq _ShiftBpp, %%mm6 \n\t" // shift mm6 mask to cover last
- // two
- // bytes
- "movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2
- "psllq _ShiftBpp, %%mm2 \n\t" // shift data to pos. correctly
- // Data only needs to be shifted once here to
- // get the correct x-bpp offset.
- "movq %%mm3, %%mm1 \n\t" // now use mm1 for getting
- // LBCarrys
- "pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte
- // where both
- // lsb's were == 1 (only valid for active group)
- "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2
- "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each
- // byte
- "paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2)
- // for each byte
- "pand %%mm6, %%mm2 \n\t" // leave only Active Group 2
- // bytes to add to Avg
- "addl $8, %%ecx \n\t"
- "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to
- // Avg for each Active
- // byte
- // now ready to write back to memory
- "movq %%mm0, -8(%%edi,%%ecx,) \n\t"
- // move updated Raw(x) to use as Raw(x-bpp) for next loop
- "cmpl _MMXLength, %%ecx \n\t"
- "movq %%mm0, %%mm2 \n\t" // mov updated Raw(x) to mm2
- "jb avg_3lp \n\t"
-
- : "=S" (dummy_value_S), // output regs (dummy)
- "=D" (dummy_value_D)
-
- : "0" (prev_row), // esi // input regs
- "1" (row) // edi
-
- : "%ecx" // clobber list
-#if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */
- , "%mm0", "%mm1", "%mm2", "%mm3"
- , "%mm4", "%mm5", "%mm6", "%mm7"
-#endif
- );
- }
- break; // end 3 bpp
-
- case 6:
- case 4:
- //case 7: // who wrote this? PNG doesn't support 5 or 7 bytes/pixel
- //case 5: // GRR BOGUS
- {
- _ActiveMask.use = 0xffffffffffffffffLL; // use shift below to clear
- // appropriate inactive bytes
- _ShiftBpp.use = bpp << 3;
- _ShiftRem.use = 64 - _ShiftBpp.use;
-
- __asm__ __volatile__ (
- "movq _HBClearMask, %%mm4 \n\t"
-
- // re-init address pointers and offset
- "movl _dif, %%ecx \n\t" // ecx: x = offset to
- // alignment boundary
-
- // load _ActiveMask and clear all bytes except for 1st active group
- "movq _ActiveMask, %%mm7 \n\t"
-// preload "movl row, %%edi \n\t" // edi: Avg(x)
- "psrlq _ShiftRem, %%mm7 \n\t"
-// preload "movl prev_row, %%esi \n\t" // esi: Prior(x)
- "movq %%mm7, %%mm6 \n\t"
- "movq _LBCarryMask, %%mm5 \n\t"
- "psllq _ShiftBpp, %%mm6 \n\t" // create mask for 2nd active
- // group
-
- // prime the pump: load the first Raw(x-bpp) data set
- "movq -8(%%edi,%%ecx,), %%mm2 \n\t" // load previous aligned 8 bytes
- // (we correct pos. in loop below)
- "avg_4lp: \n\t"
- "movq (%%edi,%%ecx,), %%mm0 \n\t"
- "psrlq _ShiftRem, %%mm2 \n\t" // shift data to pos. correctly
- "movq (%%esi,%%ecx,), %%mm1 \n\t"
- // add (Prev_row/2) to average
- "movq %%mm5, %%mm3 \n\t"
- "pand %%mm1, %%mm3 \n\t" // get lsb for each prev_row byte
- "psrlq $1, %%mm1 \n\t" // divide prev_row bytes by 2
- "pand %%mm4, %%mm1 \n\t" // clear invalid bit 7 of each
- // byte
- "paddb %%mm1, %%mm0 \n\t" // add (Prev_row/2) to Avg for
- // each byte
- // add 1st active group (Raw(x-bpp)/2) to average with _LBCarry
- "movq %%mm3, %%mm1 \n\t" // now use mm1 for getting
- // LBCarrys
- "pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte
- // where both
- // lsb's were == 1 (only valid for active group)
- "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2
- "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each
- // byte
- "paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2)
- // for each byte
- "pand %%mm7, %%mm2 \n\t" // leave only Active Group 1
- // bytes to add to Avg
- "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to Avg
- // for each Active
- // byte
- // add 2nd active group (Raw(x-bpp)/2) to average with _LBCarry
- "movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2
- "psllq _ShiftBpp, %%mm2 \n\t" // shift data to pos. correctly
- "addl $8, %%ecx \n\t"
- "movq %%mm3, %%mm1 \n\t" // now use mm1 for getting
- // LBCarrys
- "pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte
- // where both
- // lsb's were == 1 (only valid for active group)
- "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2
- "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each
- // byte
- "paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2)
- // for each byte
- "pand %%mm6, %%mm2 \n\t" // leave only Active Group 2
- // bytes to add to Avg
- "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to
- // Avg for each Active
- // byte
- "cmpl _MMXLength, %%ecx \n\t"
- // now ready to write back to memory
- "movq %%mm0, -8(%%edi,%%ecx,) \n\t"
- // prep Raw(x-bpp) for next loop
- "movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2
- "jb avg_4lp \n\t"
-
- : "=S" (dummy_value_S), // output regs (dummy)
- "=D" (dummy_value_D)
-
- : "0" (prev_row), // esi // input regs
- "1" (row) // edi
-
- : "%ecx" // clobber list
-#if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */
- , "%mm0", "%mm1", "%mm2", "%mm3"
- , "%mm4", "%mm5", "%mm6", "%mm7"
-#endif
- );
- }
- break; // end 4,6 bpp
-
- case 2:
- {
- _ActiveMask.use = 0x000000000000ffffLL;
- _ShiftBpp.use = 16; // == 2 * 8
- _ShiftRem.use = 48; // == 64 - 16
-
- __asm__ __volatile__ (
- // load _ActiveMask
- "movq _ActiveMask, %%mm7 \n\t"
- // re-init address pointers and offset
- "movl _dif, %%ecx \n\t" // ecx: x = offset to alignment
- // boundary
- "movq _LBCarryMask, %%mm5 \n\t"
-// preload "movl row, %%edi \n\t" // edi: Avg(x)
- "movq _HBClearMask, %%mm4 \n\t"
-// preload "movl prev_row, %%esi \n\t" // esi: Prior(x)
-
- // prime the pump: load the first Raw(x-bpp) data set
- "movq -8(%%edi,%%ecx,), %%mm2 \n\t" // load previous aligned 8 bytes
- // (we correct pos. in loop below)
- "avg_2lp: \n\t"
- "movq (%%edi,%%ecx,), %%mm0 \n\t"
- "psrlq _ShiftRem, %%mm2 \n\t" // shift data to pos. correctly
- "movq (%%esi,%%ecx,), %%mm1 \n\t" // (GRR BUGFIX: was psllq)
- // add (Prev_row/2) to average
- "movq %%mm5, %%mm3 \n\t"
- "pand %%mm1, %%mm3 \n\t" // get lsb for each prev_row byte
- "psrlq $1, %%mm1 \n\t" // divide prev_row bytes by 2
- "pand %%mm4, %%mm1 \n\t" // clear invalid bit 7 of each
- // byte
- "movq %%mm7, %%mm6 \n\t"
- "paddb %%mm1, %%mm0 \n\t" // add (Prev_row/2) to Avg for
- // each byte
-
- // add 1st active group (Raw(x-bpp)/2) to average with _LBCarry
- "movq %%mm3, %%mm1 \n\t" // now use mm1 for getting
- // LBCarrys
- "pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte
- // where both
- // lsb's were == 1 (only valid
- // for active group)
- "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2
- "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each
- // byte
- "paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2)
- // for each byte
- "pand %%mm6, %%mm2 \n\t" // leave only Active Group 1
- // bytes to add to Avg
- "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to Avg
- // for each Active byte
-
- // add 2nd active group (Raw(x-bpp)/2) to average with _LBCarry
- "psllq _ShiftBpp, %%mm6 \n\t" // shift the mm6 mask to cover
- // bytes 2 & 3
- "movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2
- "psllq _ShiftBpp, %%mm2 \n\t" // shift data to pos. correctly
- "movq %%mm3, %%mm1 \n\t" // now use mm1 for getting
- // LBCarrys
- "pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte
- // where both
- // lsb's were == 1 (only valid
- // for active group)
- "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2
- "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each
- // byte
- "paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2)
- // for each byte
- "pand %%mm6, %%mm2 \n\t" // leave only Active Group 2
- // bytes to add to Avg
- "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to
- // Avg for each Active byte
-
- // add 3rd active group (Raw(x-bpp)/2) to average with _LBCarry
- "psllq _ShiftBpp, %%mm6 \n\t" // shift the mm6 mask to cover
- // bytes 4 & 5
- "movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2
- "psllq _ShiftBpp, %%mm2 \n\t" // shift data to pos. correctly
- "movq %%mm3, %%mm1 \n\t" // now use mm1 for getting
- // LBCarrys
- "pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte
- // where both lsb's were == 1
- // (only valid for active group)
- "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2
- "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each
- // byte
- "paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2)
- // for each byte
- "pand %%mm6, %%mm2 \n\t" // leave only Active Group 2
- // bytes to add to Avg
- "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to
- // Avg for each Active byte
-
- // add 4th active group (Raw(x-bpp)/2) to average with _LBCarry
- "psllq _ShiftBpp, %%mm6 \n\t" // shift the mm6 mask to cover
- // bytes 6 & 7
- "movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2
- "psllq _ShiftBpp, %%mm2 \n\t" // shift data to pos. correctly
- "addl $8, %%ecx \n\t"
- "movq %%mm3, %%mm1 \n\t" // now use mm1 for getting
- // LBCarrys
- "pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte
- // where both
- // lsb's were == 1 (only valid
- // for active group)
- "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2
- "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each
- // byte
- "paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2)
- // for each byte
- "pand %%mm6, %%mm2 \n\t" // leave only Active Group 2
- // bytes to add to Avg
- "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to
- // Avg for each Active byte
-
- "cmpl _MMXLength, %%ecx \n\t"
- // now ready to write back to memory
- "movq %%mm0, -8(%%edi,%%ecx,) \n\t"
- // prep Raw(x-bpp) for next loop
- "movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2
- "jb avg_2lp \n\t"
-
- : "=S" (dummy_value_S), // output regs (dummy)
- "=D" (dummy_value_D)
-
- : "0" (prev_row), // esi // input regs
- "1" (row) // edi
-
- : "%ecx" // clobber list
-#if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */
- , "%mm0", "%mm1", "%mm2", "%mm3"
- , "%mm4", "%mm5", "%mm6", "%mm7"
-#endif
- );
- }
- break; // end 2 bpp
-
- case 1:
- {
- __asm__ __volatile__ (
- // re-init address pointers and offset
-#ifdef __PIC__
- "pushl %%ebx \n\t" // save Global Offset Table index
-#endif
- "movl _dif, %%ebx \n\t" // ebx: x = offset to alignment
- // boundary
-// preload "movl row, %%edi \n\t" // edi: Avg(x)
- "cmpl _FullLength, %%ebx \n\t" // test if offset at end of array
- "jnb avg_1end \n\t"
- // do Paeth decode for remaining bytes
-// preload "movl prev_row, %%esi \n\t" // esi: Prior(x)
- "movl %%edi, %%edx \n\t"
-// preload "subl bpp, %%edx \n\t" // (bpp is preloaded into ecx)
- "subl %%ecx, %%edx \n\t" // edx: Raw(x-bpp)
- "xorl %%ecx, %%ecx \n\t" // zero ecx before using cl & cx
- // in loop below
- "avg_1lp: \n\t"
- // Raw(x) = Avg(x) + ((Raw(x-bpp) + Prior(x))/2)
- "xorl %%eax, %%eax \n\t"
- "movb (%%esi,%%ebx,), %%cl \n\t" // load cl with Prior(x)
- "movb (%%edx,%%ebx,), %%al \n\t" // load al with Raw(x-bpp)
- "addw %%cx, %%ax \n\t"
- "incl %%ebx \n\t"
- "shrw %%ax \n\t" // divide by 2
- "addb -1(%%edi,%%ebx,), %%al \n\t" // add Avg(x); -1 to offset
- // inc ebx
- "cmpl _FullLength, %%ebx \n\t" // check if at end of array
- "movb %%al, -1(%%edi,%%ebx,) \n\t" // write back Raw(x);
- // mov does not affect flags; -1 to offset inc ebx
- "jb avg_1lp \n\t"
-
- "avg_1end: \n\t"
-#ifdef __PIC__
- "popl %%ebx \n\t" // Global Offset Table index
-#endif
-
- : "=c" (dummy_value_c), // output regs (dummy)
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "0" (bpp), // ecx // input regs
- "1" (prev_row), // esi
- "2" (row) // edi
-
- : "%eax", "%edx" // clobber list
-#ifndef __PIC__
- , "%ebx"
-#endif
- );
- }
- return; // end 1 bpp
-
- case 8:
- {
- __asm__ __volatile__ (
- // re-init address pointers and offset
- "movl _dif, %%ecx \n\t" // ecx: x == offset to alignment
- "movq _LBCarryMask, %%mm5 \n\t" // boundary
-// preload "movl row, %%edi \n\t" // edi: Avg(x)
- "movq _HBClearMask, %%mm4 \n\t"
-// preload "movl prev_row, %%esi \n\t" // esi: Prior(x)
-
- // prime the pump: load the first Raw(x-bpp) data set
- "movq -8(%%edi,%%ecx,), %%mm2 \n\t" // load previous aligned 8 bytes
- // (NO NEED to correct pos. in loop below)
-
- "avg_8lp: \n\t"
- "movq (%%edi,%%ecx,), %%mm0 \n\t"
- "movq %%mm5, %%mm3 \n\t"
- "movq (%%esi,%%ecx,), %%mm1 \n\t"
- "addl $8, %%ecx \n\t"
- "pand %%mm1, %%mm3 \n\t" // get lsb for each prev_row byte
- "psrlq $1, %%mm1 \n\t" // divide prev_row bytes by 2
- "pand %%mm2, %%mm3 \n\t" // get LBCarrys for each byte
- // where both lsb's were == 1
- "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2
- "pand %%mm4, %%mm1 \n\t" // clear invalid bit 7, each byte
- "paddb %%mm3, %%mm0 \n\t" // add LBCarrys to Avg, each byte
- "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7, each byte
- "paddb %%mm1, %%mm0 \n\t" // add (Prev_row/2) to Avg, each
- "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) to Avg for each
- "cmpl _MMXLength, %%ecx \n\t"
- "movq %%mm0, -8(%%edi,%%ecx,) \n\t"
- "movq %%mm0, %%mm2 \n\t" // reuse as Raw(x-bpp)
- "jb avg_8lp \n\t"
-
- : "=S" (dummy_value_S), // output regs (dummy)
- "=D" (dummy_value_D)
-
- : "0" (prev_row), // esi // input regs
- "1" (row) // edi
-
- : "%ecx" // clobber list
-#if 0 /* %mm0, ..., %mm5 not supported by gcc 2.7.2.3 or egcs 1.1 */
- , "%mm0", "%mm1", "%mm2"
- , "%mm3", "%mm4", "%mm5"
-#endif
- );
- }
- break; // end 8 bpp
-
- default: // bpp greater than 8 (!= 1,2,3,4,[5],6,[7],8)
- {
-
-#ifdef PNG_DEBUG
- // GRR: PRINT ERROR HERE: SHOULD NEVER BE REACHED
- png_debug(1,
- "Internal logic error in pnggccrd (png_read_filter_row_mmx_avg())\n");
-#endif
-
-#if 0
- __asm__ __volatile__ (
- "movq _LBCarryMask, %%mm5 \n\t"
- // re-init address pointers and offset
- "movl _dif, %%ebx \n\t" // ebx: x = offset to
- // alignment boundary
- "movl row, %%edi \n\t" // edi: Avg(x)
- "movq _HBClearMask, %%mm4 \n\t"
- "movl %%edi, %%edx \n\t"
- "movl prev_row, %%esi \n\t" // esi: Prior(x)
- "subl bpp, %%edx \n\t" // edx: Raw(x-bpp)
- "avg_Alp: \n\t"
- "movq (%%edi,%%ebx,), %%mm0 \n\t"
- "movq %%mm5, %%mm3 \n\t"
- "movq (%%esi,%%ebx,), %%mm1 \n\t"
- "pand %%mm1, %%mm3 \n\t" // get lsb for each prev_row byte
- "movq (%%edx,%%ebx,), %%mm2 \n\t"
- "psrlq $1, %%mm1 \n\t" // divide prev_row bytes by 2
- "pand %%mm2, %%mm3 \n\t" // get LBCarrys for each byte
- // where both lsb's were == 1
- "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2
- "pand %%mm4, %%mm1 \n\t" // clear invalid bit 7 of each
- // byte
- "paddb %%mm3, %%mm0 \n\t" // add LBCarrys to Avg for each
- // byte
- "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each
- // byte
- "paddb %%mm1, %%mm0 \n\t" // add (Prev_row/2) to Avg for
- // each byte
- "addl $8, %%ebx \n\t"
- "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) to Avg for each
- // byte
- "cmpl _MMXLength, %%ebx \n\t"
- "movq %%mm0, -8(%%edi,%%ebx,) \n\t"
- "jb avg_Alp \n\t"
-
- : // FIXASM: output regs/vars go here, e.g.: "=m" (memory_var)
-
- : // FIXASM: input regs, e.g.: "c" (count), "S" (src), "D" (dest)
-
- : "%ebx", "%edx", "%edi", "%esi" // CHECKASM: clobber list
- );
-#endif /* 0 - NEVER REACHED */
- }
- break;
-
- } // end switch (bpp)
-
- __asm__ __volatile__ (
- // MMX acceleration complete; now do clean-up
- // check if any remaining bytes left to decode
-#ifdef __PIC__
- "pushl %%ebx \n\t" // save index to Global Offset Table
-#endif
- "movl _MMXLength, %%ebx \n\t" // ebx: x == offset bytes after MMX
-//pre "movl row, %%edi \n\t" // edi: Avg(x)
- "cmpl _FullLength, %%ebx \n\t" // test if offset at end of array
- "jnb avg_end \n\t"
-
- // do Avg decode for remaining bytes
-//pre "movl prev_row, %%esi \n\t" // esi: Prior(x)
- "movl %%edi, %%edx \n\t"
-//pre "subl bpp, %%edx \n\t" // (bpp is preloaded into ecx)
- "subl %%ecx, %%edx \n\t" // edx: Raw(x-bpp)
- "xorl %%ecx, %%ecx \n\t" // zero ecx before using cl & cx below
-
- "avg_lp2: \n\t"
- // Raw(x) = Avg(x) + ((Raw(x-bpp) + Prior(x))/2)
- "xorl %%eax, %%eax \n\t"
- "movb (%%esi,%%ebx,), %%cl \n\t" // load cl with Prior(x)
- "movb (%%edx,%%ebx,), %%al \n\t" // load al with Raw(x-bpp)
- "addw %%cx, %%ax \n\t"
- "incl %%ebx \n\t"
- "shrw %%ax \n\t" // divide by 2
- "addb -1(%%edi,%%ebx,), %%al \n\t" // add Avg(x); -1 to offset inc ebx
- "cmpl _FullLength, %%ebx \n\t" // check if at end of array
- "movb %%al, -1(%%edi,%%ebx,) \n\t" // write back Raw(x) [mov does not
- "jb avg_lp2 \n\t" // affect flags; -1 to offset inc ebx]
-
- "avg_end: \n\t"
- "EMMS \n\t" // end MMX; prep for poss. FP instrs.
-#ifdef __PIC__
- "popl %%ebx \n\t" // restore index to Global Offset Table
-#endif
-
- : "=c" (dummy_value_c), // output regs (dummy)
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "0" (bpp), // ecx // input regs
- "1" (prev_row), // esi
- "2" (row) // edi
-
- : "%eax", "%edx" // clobber list
-#ifndef __PIC__
- , "%ebx"
-#endif
- );
-
-} /* end png_read_filter_row_mmx_avg() */
-#endif
-
-
-
-#ifdef PNG_THREAD_UNSAFE_OK
-//===========================================================================//
-// //
-// P N G _ R E A D _ F I L T E R _ R O W _ M M X _ P A E T H //
-// //
-//===========================================================================//
-
-// Optimized code for PNG Paeth filter decoder
-
-static void /* PRIVATE */
-png_read_filter_row_mmx_paeth(png_row_infop row_info, png_bytep row,
- png_bytep prev_row)
-{
- int bpp;
- int dummy_value_c; // fix 'forbidden register 2 (cx) was spilled' error
- int dummy_value_S;
- int dummy_value_D;
-
- bpp = (row_info->pixel_depth + 7) >> 3; // Get # bytes per pixel
- _FullLength = row_info->rowbytes; // # of bytes to filter
-
- __asm__ __volatile__ (
-#ifdef __PIC__
- "pushl %%ebx \n\t" // save index to Global Offset Table
-#endif
- "xorl %%ebx, %%ebx \n\t" // ebx: x offset
-//pre "movl row, %%edi \n\t"
- "xorl %%edx, %%edx \n\t" // edx: x-bpp offset
-//pre "movl prev_row, %%esi \n\t"
- "xorl %%eax, %%eax \n\t"
-
- // Compute the Raw value for the first bpp bytes
- // Note: the formula works out to be always
- // Paeth(x) = Raw(x) + Prior(x) where x < bpp
- "paeth_rlp: \n\t"
- "movb (%%edi,%%ebx,), %%al \n\t"
- "addb (%%esi,%%ebx,), %%al \n\t"
- "incl %%ebx \n\t"
-//pre "cmpl bpp, %%ebx \n\t" (bpp is preloaded into ecx)
- "cmpl %%ecx, %%ebx \n\t"
- "movb %%al, -1(%%edi,%%ebx,) \n\t"
- "jb paeth_rlp \n\t"
- // get # of bytes to alignment
- "movl %%edi, _dif \n\t" // take start of row
- "addl %%ebx, _dif \n\t" // add bpp
- "xorl %%ecx, %%ecx \n\t"
- "addl $0xf, _dif \n\t" // add 7 + 8 to incr past alignment
- // boundary
- "andl $0xfffffff8, _dif \n\t" // mask to alignment boundary
- "subl %%edi, _dif \n\t" // subtract from start ==> value ebx
- // at alignment
- "jz paeth_go \n\t"
- // fix alignment
-
- "paeth_lp1: \n\t"
- "xorl %%eax, %%eax \n\t"
- // pav = p - a = (a + b - c) - a = b - c
- "movb (%%esi,%%ebx,), %%al \n\t" // load Prior(x) into al
- "movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl
- "subl %%ecx, %%eax \n\t" // subtract Prior(x-bpp)
- "movl %%eax, _patemp \n\t" // Save pav for later use
- "xorl %%eax, %%eax \n\t"
- // pbv = p - b = (a + b - c) - b = a - c
- "movb (%%edi,%%edx,), %%al \n\t" // load Raw(x-bpp) into al
- "subl %%ecx, %%eax \n\t" // subtract Prior(x-bpp)
- "movl %%eax, %%ecx \n\t"
- // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv
- "addl _patemp, %%eax \n\t" // pcv = pav + pbv
- // pc = abs(pcv)
- "testl $0x80000000, %%eax \n\t"
- "jz paeth_pca \n\t"
- "negl %%eax \n\t" // reverse sign of neg values
-
- "paeth_pca: \n\t"
- "movl %%eax, _pctemp \n\t" // save pc for later use
- // pb = abs(pbv)
- "testl $0x80000000, %%ecx \n\t"
- "jz paeth_pba \n\t"
- "negl %%ecx \n\t" // reverse sign of neg values
-
- "paeth_pba: \n\t"
- "movl %%ecx, _pbtemp \n\t" // save pb for later use
- // pa = abs(pav)
- "movl _patemp, %%eax \n\t"
- "testl $0x80000000, %%eax \n\t"
- "jz paeth_paa \n\t"
- "negl %%eax \n\t" // reverse sign of neg values
-
- "paeth_paa: \n\t"
- "movl %%eax, _patemp \n\t" // save pa for later use
- // test if pa <= pb
- "cmpl %%ecx, %%eax \n\t"
- "jna paeth_abb \n\t"
- // pa > pb; now test if pb <= pc
- "cmpl _pctemp, %%ecx \n\t"
- "jna paeth_bbc \n\t"
- // pb > pc; Raw(x) = Paeth(x) + Prior(x-bpp)
- "movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl
- "jmp paeth_paeth \n\t"
-
- "paeth_bbc: \n\t"
- // pb <= pc; Raw(x) = Paeth(x) + Prior(x)
- "movb (%%esi,%%ebx,), %%cl \n\t" // load Prior(x) into cl
- "jmp paeth_paeth \n\t"
-
- "paeth_abb: \n\t"
- // pa <= pb; now test if pa <= pc
- "cmpl _pctemp, %%eax \n\t"
- "jna paeth_abc \n\t"
- // pa > pc; Raw(x) = Paeth(x) + Prior(x-bpp)
- "movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl
- "jmp paeth_paeth \n\t"
-
- "paeth_abc: \n\t"
- // pa <= pc; Raw(x) = Paeth(x) + Raw(x-bpp)
- "movb (%%edi,%%edx,), %%cl \n\t" // load Raw(x-bpp) into cl
-
- "paeth_paeth: \n\t"
- "incl %%ebx \n\t"
- "incl %%edx \n\t"
- // Raw(x) = (Paeth(x) + Paeth_Predictor( a, b, c )) mod 256
- "addb %%cl, -1(%%edi,%%ebx,) \n\t"
- "cmpl _dif, %%ebx \n\t"
- "jb paeth_lp1 \n\t"
-
- "paeth_go: \n\t"
- "movl _FullLength, %%ecx \n\t"
- "movl %%ecx, %%eax \n\t"
- "subl %%ebx, %%eax \n\t" // subtract alignment fix
- "andl $0x00000007, %%eax \n\t" // calc bytes over mult of 8
- "subl %%eax, %%ecx \n\t" // drop over bytes from original length
- "movl %%ecx, _MMXLength \n\t"
-#ifdef __PIC__
- "popl %%ebx \n\t" // restore index to Global Offset Table
-#endif
-
- : "=c" (dummy_value_c), // output regs (dummy)
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "0" (bpp), // ecx // input regs
- "1" (prev_row), // esi
- "2" (row) // edi
-
- : "%eax", "%edx" // clobber list
-#ifndef __PIC__
- , "%ebx"
-#endif
- );
-
- // now do the math for the rest of the row
- switch (bpp)
- {
- case 3:
- {
- _ActiveMask.use = 0x0000000000ffffffLL;
- _ActiveMaskEnd.use = 0xffff000000000000LL;
- _ShiftBpp.use = 24; // == bpp(3) * 8
- _ShiftRem.use = 40; // == 64 - 24
-
- __asm__ __volatile__ (
- "movl _dif, %%ecx \n\t"
-// preload "movl row, %%edi \n\t"
-// preload "movl prev_row, %%esi \n\t"
- "pxor %%mm0, %%mm0 \n\t"
- // prime the pump: load the first Raw(x-bpp) data set
- "movq -8(%%edi,%%ecx,), %%mm1 \n\t"
- "paeth_3lp: \n\t"
- "psrlq _ShiftRem, %%mm1 \n\t" // shift last 3 bytes to 1st
- // 3 bytes
- "movq (%%esi,%%ecx,), %%mm2 \n\t" // load b=Prior(x)
- "punpcklbw %%mm0, %%mm1 \n\t" // unpack High bytes of a
- "movq -8(%%esi,%%ecx,), %%mm3 \n\t" // prep c=Prior(x-bpp) bytes
- "punpcklbw %%mm0, %%mm2 \n\t" // unpack High bytes of b
- "psrlq _ShiftRem, %%mm3 \n\t" // shift last 3 bytes to 1st
- // 3 bytes
- // pav = p - a = (a + b - c) - a = b - c
- "movq %%mm2, %%mm4 \n\t"
- "punpcklbw %%mm0, %%mm3 \n\t" // unpack High bytes of c
- // pbv = p - b = (a + b - c) - b = a - c
- "movq %%mm1, %%mm5 \n\t"
- "psubw %%mm3, %%mm4 \n\t"
- "pxor %%mm7, %%mm7 \n\t"
- // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv
- "movq %%mm4, %%mm6 \n\t"
- "psubw %%mm3, %%mm5 \n\t"
-
- // pa = abs(p-a) = abs(pav)
- // pb = abs(p-b) = abs(pbv)
- // pc = abs(p-c) = abs(pcv)
- "pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0
- "paddw %%mm5, %%mm6 \n\t"
- "pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7
- "pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0
- "psubw %%mm0, %%mm4 \n\t"
- "pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0
- "psubw %%mm0, %%mm4 \n\t"
- "psubw %%mm7, %%mm5 \n\t"
- "pxor %%mm0, %%mm0 \n\t"
- "pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0
- "pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7
- "psubw %%mm7, %%mm5 \n\t"
- "psubw %%mm0, %%mm6 \n\t"
- // test pa <= pb
- "movq %%mm4, %%mm7 \n\t"
- "psubw %%mm0, %%mm6 \n\t"
- "pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb?
- "movq %%mm7, %%mm0 \n\t"
- // use mm7 mask to merge pa & pb
- "pand %%mm7, %%mm5 \n\t"
- // use mm0 mask copy to merge a & b
- "pand %%mm0, %%mm2 \n\t"
- "pandn %%mm4, %%mm7 \n\t"
- "pandn %%mm1, %%mm0 \n\t"
- "paddw %%mm5, %%mm7 \n\t"
- "paddw %%mm2, %%mm0 \n\t"
- // test ((pa <= pb)? pa:pb) <= pc
- "pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc?
- "pxor %%mm1, %%mm1 \n\t"
- "pand %%mm7, %%mm3 \n\t"
- "pandn %%mm0, %%mm7 \n\t"
- "paddw %%mm3, %%mm7 \n\t"
- "pxor %%mm0, %%mm0 \n\t"
- "packuswb %%mm1, %%mm7 \n\t"
- "movq (%%esi,%%ecx,), %%mm3 \n\t" // load c=Prior(x-bpp)
- "pand _ActiveMask, %%mm7 \n\t"
- "movq %%mm3, %%mm2 \n\t" // load b=Prior(x) step 1
- "paddb (%%edi,%%ecx,), %%mm7 \n\t" // add Paeth predictor with Raw(x)
- "punpcklbw %%mm0, %%mm3 \n\t" // unpack High bytes of c
- "movq %%mm7, (%%edi,%%ecx,) \n\t" // write back updated value
- "movq %%mm7, %%mm1 \n\t" // now mm1 will be used as
- // Raw(x-bpp)
- // now do Paeth for 2nd set of bytes (3-5)
- "psrlq _ShiftBpp, %%mm2 \n\t" // load b=Prior(x) step 2
- "punpcklbw %%mm0, %%mm1 \n\t" // unpack High bytes of a
- "pxor %%mm7, %%mm7 \n\t"
- "punpcklbw %%mm0, %%mm2 \n\t" // unpack High bytes of b
- // pbv = p - b = (a + b - c) - b = a - c
- "movq %%mm1, %%mm5 \n\t"
- // pav = p - a = (a + b - c) - a = b - c
- "movq %%mm2, %%mm4 \n\t"
- "psubw %%mm3, %%mm5 \n\t"
- "psubw %%mm3, %%mm4 \n\t"
- // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) =
- // pav + pbv = pbv + pav
- "movq %%mm5, %%mm6 \n\t"
- "paddw %%mm4, %%mm6 \n\t"
-
- // pa = abs(p-a) = abs(pav)
- // pb = abs(p-b) = abs(pbv)
- // pc = abs(p-c) = abs(pcv)
- "pcmpgtw %%mm5, %%mm0 \n\t" // create mask pbv bytes < 0
- "pcmpgtw %%mm4, %%mm7 \n\t" // create mask pav bytes < 0
- "pand %%mm5, %%mm0 \n\t" // only pbv bytes < 0 in mm0
- "pand %%mm4, %%mm7 \n\t" // only pav bytes < 0 in mm7
- "psubw %%mm0, %%mm5 \n\t"
- "psubw %%mm7, %%mm4 \n\t"
- "psubw %%mm0, %%mm5 \n\t"
- "psubw %%mm7, %%mm4 \n\t"
- "pxor %%mm0, %%mm0 \n\t"
- "pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0
- "pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7
- "psubw %%mm0, %%mm6 \n\t"
- // test pa <= pb
- "movq %%mm4, %%mm7 \n\t"
- "psubw %%mm0, %%mm6 \n\t"
- "pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb?
- "movq %%mm7, %%mm0 \n\t"
- // use mm7 mask to merge pa & pb
- "pand %%mm7, %%mm5 \n\t"
- // use mm0 mask copy to merge a & b
- "pand %%mm0, %%mm2 \n\t"
- "pandn %%mm4, %%mm7 \n\t"
- "pandn %%mm1, %%mm0 \n\t"
- "paddw %%mm5, %%mm7 \n\t"
- "paddw %%mm2, %%mm0 \n\t"
- // test ((pa <= pb)? pa:pb) <= pc
- "pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc?
- "movq (%%esi,%%ecx,), %%mm2 \n\t" // load b=Prior(x)
- "pand %%mm7, %%mm3 \n\t"
- "pandn %%mm0, %%mm7 \n\t"
- "pxor %%mm1, %%mm1 \n\t"
- "paddw %%mm3, %%mm7 \n\t"
- "pxor %%mm0, %%mm0 \n\t"
- "packuswb %%mm1, %%mm7 \n\t"
- "movq %%mm2, %%mm3 \n\t" // load c=Prior(x-bpp) step 1
- "pand _ActiveMask, %%mm7 \n\t"
- "punpckhbw %%mm0, %%mm2 \n\t" // unpack High bytes of b
- "psllq _ShiftBpp, %%mm7 \n\t" // shift bytes to 2nd group of
- // 3 bytes
- // pav = p - a = (a + b - c) - a = b - c
- "movq %%mm2, %%mm4 \n\t"
- "paddb (%%edi,%%ecx,), %%mm7 \n\t" // add Paeth predictor with Raw(x)
- "psllq _ShiftBpp, %%mm3 \n\t" // load c=Prior(x-bpp) step 2
- "movq %%mm7, (%%edi,%%ecx,) \n\t" // write back updated value
- "movq %%mm7, %%mm1 \n\t"
- "punpckhbw %%mm0, %%mm3 \n\t" // unpack High bytes of c
- "psllq _ShiftBpp, %%mm1 \n\t" // shift bytes
- // now mm1 will be used as Raw(x-bpp)
- // now do Paeth for 3rd, and final, set of bytes (6-7)
- "pxor %%mm7, %%mm7 \n\t"
- "punpckhbw %%mm0, %%mm1 \n\t" // unpack High bytes of a
- "psubw %%mm3, %%mm4 \n\t"
- // pbv = p - b = (a + b - c) - b = a - c
- "movq %%mm1, %%mm5 \n\t"
- // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv
- "movq %%mm4, %%mm6 \n\t"
- "psubw %%mm3, %%mm5 \n\t"
- "pxor %%mm0, %%mm0 \n\t"
- "paddw %%mm5, %%mm6 \n\t"
-
- // pa = abs(p-a) = abs(pav)
- // pb = abs(p-b) = abs(pbv)
- // pc = abs(p-c) = abs(pcv)
- "pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0
- "pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0
- "pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7
- "pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0
- "psubw %%mm0, %%mm4 \n\t"
- "psubw %%mm7, %%mm5 \n\t"
- "psubw %%mm0, %%mm4 \n\t"
- "psubw %%mm7, %%mm5 \n\t"
- "pxor %%mm0, %%mm0 \n\t"
- "pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0
- "pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7
- "psubw %%mm0, %%mm6 \n\t"
- // test pa <= pb
- "movq %%mm4, %%mm7 \n\t"
- "psubw %%mm0, %%mm6 \n\t"
- "pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb?
- "movq %%mm7, %%mm0 \n\t"
- // use mm0 mask copy to merge a & b
- "pand %%mm0, %%mm2 \n\t"
- // use mm7 mask to merge pa & pb
- "pand %%mm7, %%mm5 \n\t"
- "pandn %%mm1, %%mm0 \n\t"
- "pandn %%mm4, %%mm7 \n\t"
- "paddw %%mm2, %%mm0 \n\t"
- "paddw %%mm5, %%mm7 \n\t"
- // test ((pa <= pb)? pa:pb) <= pc
- "pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc?
- "pand %%mm7, %%mm3 \n\t"
- "pandn %%mm0, %%mm7 \n\t"
- "paddw %%mm3, %%mm7 \n\t"
- "pxor %%mm1, %%mm1 \n\t"
- "packuswb %%mm7, %%mm1 \n\t"
- // step ecx to next set of 8 bytes and repeat loop til done
- "addl $8, %%ecx \n\t"
- "pand _ActiveMaskEnd, %%mm1 \n\t"
- "paddb -8(%%edi,%%ecx,), %%mm1 \n\t" // add Paeth predictor with
- // Raw(x)
-
- "cmpl _MMXLength, %%ecx \n\t"
- "pxor %%mm0, %%mm0 \n\t" // pxor does not affect flags
- "movq %%mm1, -8(%%edi,%%ecx,) \n\t" // write back updated value
- // mm1 will be used as Raw(x-bpp) next loop
- // mm3 ready to be used as Prior(x-bpp) next loop
- "jb paeth_3lp \n\t"
-
- : "=S" (dummy_value_S), // output regs (dummy)
- "=D" (dummy_value_D)
-
- : "0" (prev_row), // esi // input regs
- "1" (row) // edi
-
- : "%ecx" // clobber list
-#if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */
- , "%mm0", "%mm1", "%mm2", "%mm3"
- , "%mm4", "%mm5", "%mm6", "%mm7"
-#endif
- );
- }
- break; // end 3 bpp
-
- case 6:
- //case 7: // GRR BOGUS
- //case 5: // GRR BOGUS
- {
- _ActiveMask.use = 0x00000000ffffffffLL;
- _ActiveMask2.use = 0xffffffff00000000LL;
- _ShiftBpp.use = bpp << 3; // == bpp * 8
- _ShiftRem.use = 64 - _ShiftBpp.use;
-
- __asm__ __volatile__ (
- "movl _dif, %%ecx \n\t"
-// preload "movl row, %%edi \n\t"
-// preload "movl prev_row, %%esi \n\t"
- // prime the pump: load the first Raw(x-bpp) data set
- "movq -8(%%edi,%%ecx,), %%mm1 \n\t"
- "pxor %%mm0, %%mm0 \n\t"
-
- "paeth_6lp: \n\t"
- // must shift to position Raw(x-bpp) data
- "psrlq _ShiftRem, %%mm1 \n\t"
- // do first set of 4 bytes
- "movq -8(%%esi,%%ecx,), %%mm3 \n\t" // read c=Prior(x-bpp) bytes
- "punpcklbw %%mm0, %%mm1 \n\t" // unpack Low bytes of a
- "movq (%%esi,%%ecx,), %%mm2 \n\t" // load b=Prior(x)
- "punpcklbw %%mm0, %%mm2 \n\t" // unpack Low bytes of b
- // must shift to position Prior(x-bpp) data
- "psrlq _ShiftRem, %%mm3 \n\t"
- // pav = p - a = (a + b - c) - a = b - c
- "movq %%mm2, %%mm4 \n\t"
- "punpcklbw %%mm0, %%mm3 \n\t" // unpack Low bytes of c
- // pbv = p - b = (a + b - c) - b = a - c
- "movq %%mm1, %%mm5 \n\t"
- "psubw %%mm3, %%mm4 \n\t"
- "pxor %%mm7, %%mm7 \n\t"
- // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv
- "movq %%mm4, %%mm6 \n\t"
- "psubw %%mm3, %%mm5 \n\t"
- // pa = abs(p-a) = abs(pav)
- // pb = abs(p-b) = abs(pbv)
- // pc = abs(p-c) = abs(pcv)
- "pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0
- "paddw %%mm5, %%mm6 \n\t"
- "pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7
- "pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0
- "psubw %%mm0, %%mm4 \n\t"
- "pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0
- "psubw %%mm0, %%mm4 \n\t"
- "psubw %%mm7, %%mm5 \n\t"
- "pxor %%mm0, %%mm0 \n\t"
- "pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0
- "pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7
- "psubw %%mm7, %%mm5 \n\t"
- "psubw %%mm0, %%mm6 \n\t"
- // test pa <= pb
- "movq %%mm4, %%mm7 \n\t"
- "psubw %%mm0, %%mm6 \n\t"
- "pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb?
- "movq %%mm7, %%mm0 \n\t"
- // use mm7 mask to merge pa & pb
- "pand %%mm7, %%mm5 \n\t"
- // use mm0 mask copy to merge a & b
- "pand %%mm0, %%mm2 \n\t"
- "pandn %%mm4, %%mm7 \n\t"
- "pandn %%mm1, %%mm0 \n\t"
- "paddw %%mm5, %%mm7 \n\t"
- "paddw %%mm2, %%mm0 \n\t"
- // test ((pa <= pb)? pa:pb) <= pc
- "pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc?
- "pxor %%mm1, %%mm1 \n\t"
- "pand %%mm7, %%mm3 \n\t"
- "pandn %%mm0, %%mm7 \n\t"
- "paddw %%mm3, %%mm7 \n\t"
- "pxor %%mm0, %%mm0 \n\t"
- "packuswb %%mm1, %%mm7 \n\t"
- "movq -8(%%esi,%%ecx,), %%mm3 \n\t" // load c=Prior(x-bpp)
- "pand _ActiveMask, %%mm7 \n\t"
- "psrlq _ShiftRem, %%mm3 \n\t"
- "movq (%%esi,%%ecx,), %%mm2 \n\t" // load b=Prior(x) step 1
- "paddb (%%edi,%%ecx,), %%mm7 \n\t" // add Paeth predictor and Raw(x)
- "movq %%mm2, %%mm6 \n\t"
- "movq %%mm7, (%%edi,%%ecx,) \n\t" // write back updated value
- "movq -8(%%edi,%%ecx,), %%mm1 \n\t"
- "psllq _ShiftBpp, %%mm6 \n\t"
- "movq %%mm7, %%mm5 \n\t"
- "psrlq _ShiftRem, %%mm1 \n\t"
- "por %%mm6, %%mm3 \n\t"
- "psllq _ShiftBpp, %%mm5 \n\t"
- "punpckhbw %%mm0, %%mm3 \n\t" // unpack High bytes of c
- "por %%mm5, %%mm1 \n\t"
- // do second set of 4 bytes
- "punpckhbw %%mm0, %%mm2 \n\t" // unpack High bytes of b
- "punpckhbw %%mm0, %%mm1 \n\t" // unpack High bytes of a
- // pav = p - a = (a + b - c) - a = b - c
- "movq %%mm2, %%mm4 \n\t"
- // pbv = p - b = (a + b - c) - b = a - c
- "movq %%mm1, %%mm5 \n\t"
- "psubw %%mm3, %%mm4 \n\t"
- "pxor %%mm7, %%mm7 \n\t"
- // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv
- "movq %%mm4, %%mm6 \n\t"
- "psubw %%mm3, %%mm5 \n\t"
- // pa = abs(p-a) = abs(pav)
- // pb = abs(p-b) = abs(pbv)
- // pc = abs(p-c) = abs(pcv)
- "pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0
- "paddw %%mm5, %%mm6 \n\t"
- "pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7
- "pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0
- "psubw %%mm0, %%mm4 \n\t"
- "pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0
- "psubw %%mm0, %%mm4 \n\t"
- "psubw %%mm7, %%mm5 \n\t"
- "pxor %%mm0, %%mm0 \n\t"
- "pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0
- "pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7
- "psubw %%mm7, %%mm5 \n\t"
- "psubw %%mm0, %%mm6 \n\t"
- // test pa <= pb
- "movq %%mm4, %%mm7 \n\t"
- "psubw %%mm0, %%mm6 \n\t"
- "pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb?
- "movq %%mm7, %%mm0 \n\t"
- // use mm7 mask to merge pa & pb
- "pand %%mm7, %%mm5 \n\t"
- // use mm0 mask copy to merge a & b
- "pand %%mm0, %%mm2 \n\t"
- "pandn %%mm4, %%mm7 \n\t"
- "pandn %%mm1, %%mm0 \n\t"
- "paddw %%mm5, %%mm7 \n\t"
- "paddw %%mm2, %%mm0 \n\t"
- // test ((pa <= pb)? pa:pb) <= pc
- "pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc?
- "pxor %%mm1, %%mm1 \n\t"
- "pand %%mm7, %%mm3 \n\t"
- "pandn %%mm0, %%mm7 \n\t"
- "pxor %%mm1, %%mm1 \n\t"
- "paddw %%mm3, %%mm7 \n\t"
- "pxor %%mm0, %%mm0 \n\t"
- // step ecx to next set of 8 bytes and repeat loop til done
- "addl $8, %%ecx \n\t"
- "packuswb %%mm7, %%mm1 \n\t"
- "paddb -8(%%edi,%%ecx,), %%mm1 \n\t" // add Paeth predictor with Raw(x)
- "cmpl _MMXLength, %%ecx \n\t"
- "movq %%mm1, -8(%%edi,%%ecx,) \n\t" // write back updated value
- // mm1 will be used as Raw(x-bpp) next loop
- "jb paeth_6lp \n\t"
-
- : "=S" (dummy_value_S), // output regs (dummy)
- "=D" (dummy_value_D)
-
- : "0" (prev_row), // esi // input regs
- "1" (row) // edi
-
- : "%ecx" // clobber list
-#if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */
- , "%mm0", "%mm1", "%mm2", "%mm3"
- , "%mm4", "%mm5", "%mm6", "%mm7"
-#endif
- );
- }
- break; // end 6 bpp
-
- case 4:
- {
- _ActiveMask.use = 0x00000000ffffffffLL;
-
- __asm__ __volatile__ (
- "movl _dif, %%ecx \n\t"
-// preload "movl row, %%edi \n\t"
-// preload "movl prev_row, %%esi \n\t"
- "pxor %%mm0, %%mm0 \n\t"
- // prime the pump: load the first Raw(x-bpp) data set
- "movq -8(%%edi,%%ecx,), %%mm1 \n\t" // only time should need to read
- // a=Raw(x-bpp) bytes
- "paeth_4lp: \n\t"
- // do first set of 4 bytes
- "movq -8(%%esi,%%ecx,), %%mm3 \n\t" // read c=Prior(x-bpp) bytes
- "punpckhbw %%mm0, %%mm1 \n\t" // unpack Low bytes of a
- "movq (%%esi,%%ecx,), %%mm2 \n\t" // load b=Prior(x)
- "punpcklbw %%mm0, %%mm2 \n\t" // unpack High bytes of b
- // pav = p - a = (a + b - c) - a = b - c
- "movq %%mm2, %%mm4 \n\t"
- "punpckhbw %%mm0, %%mm3 \n\t" // unpack High bytes of c
- // pbv = p - b = (a + b - c) - b = a - c
- "movq %%mm1, %%mm5 \n\t"
- "psubw %%mm3, %%mm4 \n\t"
- "pxor %%mm7, %%mm7 \n\t"
- // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv
- "movq %%mm4, %%mm6 \n\t"
- "psubw %%mm3, %%mm5 \n\t"
- // pa = abs(p-a) = abs(pav)
- // pb = abs(p-b) = abs(pbv)
- // pc = abs(p-c) = abs(pcv)
- "pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0
- "paddw %%mm5, %%mm6 \n\t"
- "pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7
- "pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0
- "psubw %%mm0, %%mm4 \n\t"
- "pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0
- "psubw %%mm0, %%mm4 \n\t"
- "psubw %%mm7, %%mm5 \n\t"
- "pxor %%mm0, %%mm0 \n\t"
- "pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0
- "pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7
- "psubw %%mm7, %%mm5 \n\t"
- "psubw %%mm0, %%mm6 \n\t"
- // test pa <= pb
- "movq %%mm4, %%mm7 \n\t"
- "psubw %%mm0, %%mm6 \n\t"
- "pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb?
- "movq %%mm7, %%mm0 \n\t"
- // use mm7 mask to merge pa & pb
- "pand %%mm7, %%mm5 \n\t"
- // use mm0 mask copy to merge a & b
- "pand %%mm0, %%mm2 \n\t"
- "pandn %%mm4, %%mm7 \n\t"
- "pandn %%mm1, %%mm0 \n\t"
- "paddw %%mm5, %%mm7 \n\t"
- "paddw %%mm2, %%mm0 \n\t"
- // test ((pa <= pb)? pa:pb) <= pc
- "pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc?
- "pxor %%mm1, %%mm1 \n\t"
- "pand %%mm7, %%mm3 \n\t"
- "pandn %%mm0, %%mm7 \n\t"
- "paddw %%mm3, %%mm7 \n\t"
- "pxor %%mm0, %%mm0 \n\t"
- "packuswb %%mm1, %%mm7 \n\t"
- "movq (%%esi,%%ecx,), %%mm3 \n\t" // load c=Prior(x-bpp)
- "pand _ActiveMask, %%mm7 \n\t"
- "movq %%mm3, %%mm2 \n\t" // load b=Prior(x) step 1
- "paddb (%%edi,%%ecx,), %%mm7 \n\t" // add Paeth predictor with Raw(x)
- "punpcklbw %%mm0, %%mm3 \n\t" // unpack High bytes of c
- "movq %%mm7, (%%edi,%%ecx,) \n\t" // write back updated value
- "movq %%mm7, %%mm1 \n\t" // now mm1 will be used as Raw(x-bpp)
- // do second set of 4 bytes
- "punpckhbw %%mm0, %%mm2 \n\t" // unpack Low bytes of b
- "punpcklbw %%mm0, %%mm1 \n\t" // unpack Low bytes of a
- // pav = p - a = (a + b - c) - a = b - c
- "movq %%mm2, %%mm4 \n\t"
- // pbv = p - b = (a + b - c) - b = a - c
- "movq %%mm1, %%mm5 \n\t"
- "psubw %%mm3, %%mm4 \n\t"
- "pxor %%mm7, %%mm7 \n\t"
- // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv
- "movq %%mm4, %%mm6 \n\t"
- "psubw %%mm3, %%mm5 \n\t"
- // pa = abs(p-a) = abs(pav)
- // pb = abs(p-b) = abs(pbv)
- // pc = abs(p-c) = abs(pcv)
- "pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0
- "paddw %%mm5, %%mm6 \n\t"
- "pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7
- "pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0
- "psubw %%mm0, %%mm4 \n\t"
- "pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0
- "psubw %%mm0, %%mm4 \n\t"
- "psubw %%mm7, %%mm5 \n\t"
- "pxor %%mm0, %%mm0 \n\t"
- "pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0
- "pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7
- "psubw %%mm7, %%mm5 \n\t"
- "psubw %%mm0, %%mm6 \n\t"
- // test pa <= pb
- "movq %%mm4, %%mm7 \n\t"
- "psubw %%mm0, %%mm6 \n\t"
- "pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb?
- "movq %%mm7, %%mm0 \n\t"
- // use mm7 mask to merge pa & pb
- "pand %%mm7, %%mm5 \n\t"
- // use mm0 mask copy to merge a & b
- "pand %%mm0, %%mm2 \n\t"
- "pandn %%mm4, %%mm7 \n\t"
- "pandn %%mm1, %%mm0 \n\t"
- "paddw %%mm5, %%mm7 \n\t"
- "paddw %%mm2, %%mm0 \n\t"
- // test ((pa <= pb)? pa:pb) <= pc
- "pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc?
- "pxor %%mm1, %%mm1 \n\t"
- "pand %%mm7, %%mm3 \n\t"
- "pandn %%mm0, %%mm7 \n\t"
- "pxor %%mm1, %%mm1 \n\t"
- "paddw %%mm3, %%mm7 \n\t"
- "pxor %%mm0, %%mm0 \n\t"
- // step ecx to next set of 8 bytes and repeat loop til done
- "addl $8, %%ecx \n\t"
- "packuswb %%mm7, %%mm1 \n\t"
- "paddb -8(%%edi,%%ecx,), %%mm1 \n\t" // add predictor with Raw(x)
- "cmpl _MMXLength, %%ecx \n\t"
- "movq %%mm1, -8(%%edi,%%ecx,) \n\t" // write back updated value
- // mm1 will be used as Raw(x-bpp) next loop
- "jb paeth_4lp \n\t"
-
- : "=S" (dummy_value_S), // output regs (dummy)
- "=D" (dummy_value_D)
-
- : "0" (prev_row), // esi // input regs
- "1" (row) // edi
-
- : "%ecx" // clobber list
-#if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */
- , "%mm0", "%mm1", "%mm2", "%mm3"
- , "%mm4", "%mm5", "%mm6", "%mm7"
-#endif
- );
- }
- break; // end 4 bpp
-
- case 8: // bpp == 8
- {
- _ActiveMask.use = 0x00000000ffffffffLL;
-
- __asm__ __volatile__ (
- "movl _dif, %%ecx \n\t"
-// preload "movl row, %%edi \n\t"
-// preload "movl prev_row, %%esi \n\t"
- "pxor %%mm0, %%mm0 \n\t"
- // prime the pump: load the first Raw(x-bpp) data set
- "movq -8(%%edi,%%ecx,), %%mm1 \n\t" // only time should need to read
- // a=Raw(x-bpp) bytes
- "paeth_8lp: \n\t"
- // do first set of 4 bytes
- "movq -8(%%esi,%%ecx,), %%mm3 \n\t" // read c=Prior(x-bpp) bytes
- "punpcklbw %%mm0, %%mm1 \n\t" // unpack Low bytes of a
- "movq (%%esi,%%ecx,), %%mm2 \n\t" // load b=Prior(x)
- "punpcklbw %%mm0, %%mm2 \n\t" // unpack Low bytes of b
- // pav = p - a = (a + b - c) - a = b - c
- "movq %%mm2, %%mm4 \n\t"
- "punpcklbw %%mm0, %%mm3 \n\t" // unpack Low bytes of c
- // pbv = p - b = (a + b - c) - b = a - c
- "movq %%mm1, %%mm5 \n\t"
- "psubw %%mm3, %%mm4 \n\t"
- "pxor %%mm7, %%mm7 \n\t"
- // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv
- "movq %%mm4, %%mm6 \n\t"
- "psubw %%mm3, %%mm5 \n\t"
- // pa = abs(p-a) = abs(pav)
- // pb = abs(p-b) = abs(pbv)
- // pc = abs(p-c) = abs(pcv)
- "pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0
- "paddw %%mm5, %%mm6 \n\t"
- "pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7
- "pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0
- "psubw %%mm0, %%mm4 \n\t"
- "pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0
- "psubw %%mm0, %%mm4 \n\t"
- "psubw %%mm7, %%mm5 \n\t"
- "pxor %%mm0, %%mm0 \n\t"
- "pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0
- "pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7
- "psubw %%mm7, %%mm5 \n\t"
- "psubw %%mm0, %%mm6 \n\t"
- // test pa <= pb
- "movq %%mm4, %%mm7 \n\t"
- "psubw %%mm0, %%mm6 \n\t"
- "pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb?
- "movq %%mm7, %%mm0 \n\t"
- // use mm7 mask to merge pa & pb
- "pand %%mm7, %%mm5 \n\t"
- // use mm0 mask copy to merge a & b
- "pand %%mm0, %%mm2 \n\t"
- "pandn %%mm4, %%mm7 \n\t"
- "pandn %%mm1, %%mm0 \n\t"
- "paddw %%mm5, %%mm7 \n\t"
- "paddw %%mm2, %%mm0 \n\t"
- // test ((pa <= pb)? pa:pb) <= pc
- "pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc?
- "pxor %%mm1, %%mm1 \n\t"
- "pand %%mm7, %%mm3 \n\t"
- "pandn %%mm0, %%mm7 \n\t"
- "paddw %%mm3, %%mm7 \n\t"
- "pxor %%mm0, %%mm0 \n\t"
- "packuswb %%mm1, %%mm7 \n\t"
- "movq -8(%%esi,%%ecx,), %%mm3 \n\t" // read c=Prior(x-bpp) bytes
- "pand _ActiveMask, %%mm7 \n\t"
- "movq (%%esi,%%ecx,), %%mm2 \n\t" // load b=Prior(x)
- "paddb (%%edi,%%ecx,), %%mm7 \n\t" // add Paeth predictor with Raw(x)
- "punpckhbw %%mm0, %%mm3 \n\t" // unpack High bytes of c
- "movq %%mm7, (%%edi,%%ecx,) \n\t" // write back updated value
- "movq -8(%%edi,%%ecx,), %%mm1 \n\t" // read a=Raw(x-bpp) bytes
-
- // do second set of 4 bytes
- "punpckhbw %%mm0, %%mm2 \n\t" // unpack High bytes of b
- "punpckhbw %%mm0, %%mm1 \n\t" // unpack High bytes of a
- // pav = p - a = (a + b - c) - a = b - c
- "movq %%mm2, %%mm4 \n\t"
- // pbv = p - b = (a + b - c) - b = a - c
- "movq %%mm1, %%mm5 \n\t"
- "psubw %%mm3, %%mm4 \n\t"
- "pxor %%mm7, %%mm7 \n\t"
- // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv
- "movq %%mm4, %%mm6 \n\t"
- "psubw %%mm3, %%mm5 \n\t"
- // pa = abs(p-a) = abs(pav)
- // pb = abs(p-b) = abs(pbv)
- // pc = abs(p-c) = abs(pcv)
- "pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0
- "paddw %%mm5, %%mm6 \n\t"
- "pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7
- "pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0
- "psubw %%mm0, %%mm4 \n\t"
- "pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0
- "psubw %%mm0, %%mm4 \n\t"
- "psubw %%mm7, %%mm5 \n\t"
- "pxor %%mm0, %%mm0 \n\t"
- "pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0
- "pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7
- "psubw %%mm7, %%mm5 \n\t"
- "psubw %%mm0, %%mm6 \n\t"
- // test pa <= pb
- "movq %%mm4, %%mm7 \n\t"
- "psubw %%mm0, %%mm6 \n\t"
- "pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb?
- "movq %%mm7, %%mm0 \n\t"
- // use mm7 mask to merge pa & pb
- "pand %%mm7, %%mm5 \n\t"
- // use mm0 mask copy to merge a & b
- "pand %%mm0, %%mm2 \n\t"
- "pandn %%mm4, %%mm7 \n\t"
- "pandn %%mm1, %%mm0 \n\t"
- "paddw %%mm5, %%mm7 \n\t"
- "paddw %%mm2, %%mm0 \n\t"
- // test ((pa <= pb)? pa:pb) <= pc
- "pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc?
- "pxor %%mm1, %%mm1 \n\t"
- "pand %%mm7, %%mm3 \n\t"
- "pandn %%mm0, %%mm7 \n\t"
- "pxor %%mm1, %%mm1 \n\t"
- "paddw %%mm3, %%mm7 \n\t"
- "pxor %%mm0, %%mm0 \n\t"
- // step ecx to next set of 8 bytes and repeat loop til done
- "addl $8, %%ecx \n\t"
- "packuswb %%mm7, %%mm1 \n\t"
- "paddb -8(%%edi,%%ecx,), %%mm1 \n\t" // add Paeth predictor with Raw(x)
- "cmpl _MMXLength, %%ecx \n\t"
- "movq %%mm1, -8(%%edi,%%ecx,) \n\t" // write back updated value
- // mm1 will be used as Raw(x-bpp) next loop
- "jb paeth_8lp \n\t"
-
- : "=S" (dummy_value_S), // output regs (dummy)
- "=D" (dummy_value_D)
-
- : "0" (prev_row), // esi // input regs
- "1" (row) // edi
-
- : "%ecx" // clobber list
-#if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */
- , "%mm0", "%mm1", "%mm2", "%mm3"
- , "%mm4", "%mm5", "%mm6", "%mm7"
-#endif
- );
- }
- break; // end 8 bpp
-
- case 1: // bpp = 1
- case 2: // bpp = 2
- default: // bpp > 8
- {
- __asm__ __volatile__ (
-#ifdef __PIC__
- "pushl %%ebx \n\t" // save Global Offset Table index
-#endif
- "movl _dif, %%ebx \n\t"
- "cmpl _FullLength, %%ebx \n\t"
- "jnb paeth_dend \n\t"
-
-// preload "movl row, %%edi \n\t"
-// preload "movl prev_row, %%esi \n\t"
- // do Paeth decode for remaining bytes
- "movl %%ebx, %%edx \n\t"
-// preload "subl bpp, %%edx \n\t" // (bpp is preloaded into ecx)
- "subl %%ecx, %%edx \n\t" // edx = ebx - bpp
- "xorl %%ecx, %%ecx \n\t" // zero ecx before using cl & cx
-
- "paeth_dlp: \n\t"
- "xorl %%eax, %%eax \n\t"
- // pav = p - a = (a + b - c) - a = b - c
- "movb (%%esi,%%ebx,), %%al \n\t" // load Prior(x) into al
- "movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl
- "subl %%ecx, %%eax \n\t" // subtract Prior(x-bpp)
- "movl %%eax, _patemp \n\t" // Save pav for later use
- "xorl %%eax, %%eax \n\t"
- // pbv = p - b = (a + b - c) - b = a - c
- "movb (%%edi,%%edx,), %%al \n\t" // load Raw(x-bpp) into al
- "subl %%ecx, %%eax \n\t" // subtract Prior(x-bpp)
- "movl %%eax, %%ecx \n\t"
- // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv
- "addl _patemp, %%eax \n\t" // pcv = pav + pbv
- // pc = abs(pcv)
- "testl $0x80000000, %%eax \n\t"
- "jz paeth_dpca \n\t"
- "negl %%eax \n\t" // reverse sign of neg values
-
- "paeth_dpca: \n\t"
- "movl %%eax, _pctemp \n\t" // save pc for later use
- // pb = abs(pbv)
- "testl $0x80000000, %%ecx \n\t"
- "jz paeth_dpba \n\t"
- "negl %%ecx \n\t" // reverse sign of neg values
-
- "paeth_dpba: \n\t"
- "movl %%ecx, _pbtemp \n\t" // save pb for later use
- // pa = abs(pav)
- "movl _patemp, %%eax \n\t"
- "testl $0x80000000, %%eax \n\t"
- "jz paeth_dpaa \n\t"
- "negl %%eax \n\t" // reverse sign of neg values
-
- "paeth_dpaa: \n\t"
- "movl %%eax, _patemp \n\t" // save pa for later use
- // test if pa <= pb
- "cmpl %%ecx, %%eax \n\t"
- "jna paeth_dabb \n\t"
- // pa > pb; now test if pb <= pc
- "cmpl _pctemp, %%ecx \n\t"
- "jna paeth_dbbc \n\t"
- // pb > pc; Raw(x) = Paeth(x) + Prior(x-bpp)
- "movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl
- "jmp paeth_dpaeth \n\t"
-
- "paeth_dbbc: \n\t"
- // pb <= pc; Raw(x) = Paeth(x) + Prior(x)
- "movb (%%esi,%%ebx,), %%cl \n\t" // load Prior(x) into cl
- "jmp paeth_dpaeth \n\t"
-
- "paeth_dabb: \n\t"
- // pa <= pb; now test if pa <= pc
- "cmpl _pctemp, %%eax \n\t"
- "jna paeth_dabc \n\t"
- // pa > pc; Raw(x) = Paeth(x) + Prior(x-bpp)
- "movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl
- "jmp paeth_dpaeth \n\t"
-
- "paeth_dabc: \n\t"
- // pa <= pc; Raw(x) = Paeth(x) + Raw(x-bpp)
- "movb (%%edi,%%edx,), %%cl \n\t" // load Raw(x-bpp) into cl
-
- "paeth_dpaeth: \n\t"
- "incl %%ebx \n\t"
- "incl %%edx \n\t"
- // Raw(x) = (Paeth(x) + Paeth_Predictor( a, b, c )) mod 256
- "addb %%cl, -1(%%edi,%%ebx,) \n\t"
- "cmpl _FullLength, %%ebx \n\t"
- "jb paeth_dlp \n\t"
-
- "paeth_dend: \n\t"
-#ifdef __PIC__
- "popl %%ebx \n\t" // index to Global Offset Table
-#endif
-
- : "=c" (dummy_value_c), // output regs (dummy)
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "0" (bpp), // ecx // input regs
- "1" (prev_row), // esi
- "2" (row) // edi
-
- : "%eax", "%edx" // clobber list
-#ifndef __PIC__
- , "%ebx"
-#endif
- );
- }
- return; // No need to go further with this one
-
- } // end switch (bpp)
-
- __asm__ __volatile__ (
- // MMX acceleration complete; now do clean-up
- // check if any remaining bytes left to decode
-#ifdef __PIC__
- "pushl %%ebx \n\t" // save index to Global Offset Table
-#endif
- "movl _MMXLength, %%ebx \n\t"
- "cmpl _FullLength, %%ebx \n\t"
- "jnb paeth_end \n\t"
-//pre "movl row, %%edi \n\t"
-//pre "movl prev_row, %%esi \n\t"
- // do Paeth decode for remaining bytes
- "movl %%ebx, %%edx \n\t"
-//pre "subl bpp, %%edx \n\t" // (bpp is preloaded into ecx)
- "subl %%ecx, %%edx \n\t" // edx = ebx - bpp
- "xorl %%ecx, %%ecx \n\t" // zero ecx before using cl & cx below
-
- "paeth_lp2: \n\t"
- "xorl %%eax, %%eax \n\t"
- // pav = p - a = (a + b - c) - a = b - c
- "movb (%%esi,%%ebx,), %%al \n\t" // load Prior(x) into al
- "movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl
- "subl %%ecx, %%eax \n\t" // subtract Prior(x-bpp)
- "movl %%eax, _patemp \n\t" // Save pav for later use
- "xorl %%eax, %%eax \n\t"
- // pbv = p - b = (a + b - c) - b = a - c
- "movb (%%edi,%%edx,), %%al \n\t" // load Raw(x-bpp) into al
- "subl %%ecx, %%eax \n\t" // subtract Prior(x-bpp)
- "movl %%eax, %%ecx \n\t"
- // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv
- "addl _patemp, %%eax \n\t" // pcv = pav + pbv
- // pc = abs(pcv)
- "testl $0x80000000, %%eax \n\t"
- "jz paeth_pca2 \n\t"
- "negl %%eax \n\t" // reverse sign of neg values
-
- "paeth_pca2: \n\t"
- "movl %%eax, _pctemp \n\t" // save pc for later use
- // pb = abs(pbv)
- "testl $0x80000000, %%ecx \n\t"
- "jz paeth_pba2 \n\t"
- "negl %%ecx \n\t" // reverse sign of neg values
-
- "paeth_pba2: \n\t"
- "movl %%ecx, _pbtemp \n\t" // save pb for later use
- // pa = abs(pav)
- "movl _patemp, %%eax \n\t"
- "testl $0x80000000, %%eax \n\t"
- "jz paeth_paa2 \n\t"
- "negl %%eax \n\t" // reverse sign of neg values
-
- "paeth_paa2: \n\t"
- "movl %%eax, _patemp \n\t" // save pa for later use
- // test if pa <= pb
- "cmpl %%ecx, %%eax \n\t"
- "jna paeth_abb2 \n\t"
- // pa > pb; now test if pb <= pc
- "cmpl _pctemp, %%ecx \n\t"
- "jna paeth_bbc2 \n\t"
- // pb > pc; Raw(x) = Paeth(x) + Prior(x-bpp)
- "movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl
- "jmp paeth_paeth2 \n\t"
-
- "paeth_bbc2: \n\t"
- // pb <= pc; Raw(x) = Paeth(x) + Prior(x)
- "movb (%%esi,%%ebx,), %%cl \n\t" // load Prior(x) into cl
- "jmp paeth_paeth2 \n\t"
-
- "paeth_abb2: \n\t"
- // pa <= pb; now test if pa <= pc
- "cmpl _pctemp, %%eax \n\t"
- "jna paeth_abc2 \n\t"
- // pa > pc; Raw(x) = Paeth(x) + Prior(x-bpp)
- "movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl
- "jmp paeth_paeth2 \n\t"
-
- "paeth_abc2: \n\t"
- // pa <= pc; Raw(x) = Paeth(x) + Raw(x-bpp)
- "movb (%%edi,%%edx,), %%cl \n\t" // load Raw(x-bpp) into cl
-
- "paeth_paeth2: \n\t"
- "incl %%ebx \n\t"
- "incl %%edx \n\t"
- // Raw(x) = (Paeth(x) + Paeth_Predictor( a, b, c )) mod 256
- "addb %%cl, -1(%%edi,%%ebx,) \n\t"
- "cmpl _FullLength, %%ebx \n\t"
- "jb paeth_lp2 \n\t"
-
- "paeth_end: \n\t"
- "EMMS \n\t" // end MMX; prep for poss. FP instrs.
-#ifdef __PIC__
- "popl %%ebx \n\t" // restore index to Global Offset Table
-#endif
-
- : "=c" (dummy_value_c), // output regs (dummy)
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "0" (bpp), // ecx // input regs
- "1" (prev_row), // esi
- "2" (row) // edi
-
- : "%eax", "%edx" // clobber list (no input regs!)
-#ifndef __PIC__
- , "%ebx"
-#endif
- );
-
-} /* end png_read_filter_row_mmx_paeth() */
-#endif
-
-
-
-
-#ifdef PNG_THREAD_UNSAFE_OK
-//===========================================================================//
-// //
-// P N G _ R E A D _ F I L T E R _ R O W _ M M X _ S U B //
-// //
-//===========================================================================//
-
-// Optimized code for PNG Sub filter decoder
-
-static void /* PRIVATE */
-png_read_filter_row_mmx_sub(png_row_infop row_info, png_bytep row)
-{
- int bpp;
- int dummy_value_a;
- int dummy_value_D;
-
- bpp = (row_info->pixel_depth + 7) >> 3; // calc number of bytes per pixel
- _FullLength = row_info->rowbytes - bpp; // number of bytes to filter
-
- __asm__ __volatile__ (
-//pre "movl row, %%edi \n\t"
- "movl %%edi, %%esi \n\t" // lp = row
-//pre "movl bpp, %%eax \n\t"
- "addl %%eax, %%edi \n\t" // rp = row + bpp
-//irr "xorl %%eax, %%eax \n\t"
- // get # of bytes to alignment
- "movl %%edi, _dif \n\t" // take start of row
- "addl $0xf, _dif \n\t" // add 7 + 8 to incr past
- // alignment boundary
- "xorl %%ecx, %%ecx \n\t"
- "andl $0xfffffff8, _dif \n\t" // mask to alignment boundary
- "subl %%edi, _dif \n\t" // subtract from start ==> value
- "jz sub_go \n\t" // ecx at alignment
-
- "sub_lp1: \n\t" // fix alignment
- "movb (%%esi,%%ecx,), %%al \n\t"
- "addb %%al, (%%edi,%%ecx,) \n\t"
- "incl %%ecx \n\t"
- "cmpl _dif, %%ecx \n\t"
- "jb sub_lp1 \n\t"
-
- "sub_go: \n\t"
- "movl _FullLength, %%eax \n\t"
- "movl %%eax, %%edx \n\t"
- "subl %%ecx, %%edx \n\t" // subtract alignment fix
- "andl $0x00000007, %%edx \n\t" // calc bytes over mult of 8
- "subl %%edx, %%eax \n\t" // drop over bytes from length
- "movl %%eax, _MMXLength \n\t"
-
- : "=a" (dummy_value_a), // 0 // output regs (dummy)
- "=D" (dummy_value_D) // 1
-
- : "0" (bpp), // eax // input regs
- "1" (row) // edi
-
- : "%ebx", "%ecx", "%edx" // clobber list
- , "%esi"
-
-#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
- , "%mm0", "%mm1", "%mm2", "%mm3"
- , "%mm4", "%mm5", "%mm6", "%mm7"
-#endif
- );
-
- // now do the math for the rest of the row
- switch (bpp)
- {
- case 3:
- {
- _ActiveMask.use = 0x0000ffffff000000LL;
- _ShiftBpp.use = 24; // == 3 * 8
- _ShiftRem.use = 40; // == 64 - 24
-
- __asm__ __volatile__ (
-// preload "movl row, %%edi \n\t"
- "movq _ActiveMask, %%mm7 \n\t" // load _ActiveMask for 2nd
- // active byte group
- "movl %%edi, %%esi \n\t" // lp = row
-// preload "movl bpp, %%eax \n\t"
- "addl %%eax, %%edi \n\t" // rp = row + bpp
- "movq %%mm7, %%mm6 \n\t"
- "movl _dif, %%edx \n\t"
- "psllq _ShiftBpp, %%mm6 \n\t" // move mask in mm6 to cover
- // 3rd active byte group
- // prime the pump: load the first Raw(x-bpp) data set
- "movq -8(%%edi,%%edx,), %%mm1 \n\t"
-
- "sub_3lp: \n\t" // shift data for adding first
- "psrlq _ShiftRem, %%mm1 \n\t" // bpp bytes (no need for mask;
- // shift clears inactive bytes)
- // add 1st active group
- "movq (%%edi,%%edx,), %%mm0 \n\t"
- "paddb %%mm1, %%mm0 \n\t"
-
- // add 2nd active group
- "movq %%mm0, %%mm1 \n\t" // mov updated Raws to mm1
- "psllq _ShiftBpp, %%mm1 \n\t" // shift data to pos. correctly
- "pand %%mm7, %%mm1 \n\t" // mask to use 2nd active group
- "paddb %%mm1, %%mm0 \n\t"
-
- // add 3rd active group
- "movq %%mm0, %%mm1 \n\t" // mov updated Raws to mm1
- "psllq _ShiftBpp, %%mm1 \n\t" // shift data to pos. correctly
- "pand %%mm6, %%mm1 \n\t" // mask to use 3rd active group
- "addl $8, %%edx \n\t"
- "paddb %%mm1, %%mm0 \n\t"
-
- "cmpl _MMXLength, %%edx \n\t"
- "movq %%mm0, -8(%%edi,%%edx,) \n\t" // write updated Raws to array
- "movq %%mm0, %%mm1 \n\t" // prep 1st add at top of loop
- "jb sub_3lp \n\t"
-
- : "=a" (dummy_value_a), // 0 // output regs (dummy)
- "=D" (dummy_value_D) // 1
-
- : "0" (bpp), // eax // input regs
- "1" (row) // edi
-
- : "%edx", "%esi" // clobber list
-#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
- , "%mm0", "%mm1", "%mm6", "%mm7"
-#endif
- );
- }
- break;
-
- case 1:
- {
- __asm__ __volatile__ (
- "movl _dif, %%edx \n\t"
-// preload "movl row, %%edi \n\t"
- "cmpl _FullLength, %%edx \n\t"
- "jnb sub_1end \n\t"
- "movl %%edi, %%esi \n\t" // lp = row
- "xorl %%eax, %%eax \n\t"
-// preload "movl bpp, %%eax \n\t"
- "addl %%eax, %%edi \n\t" // rp = row + bpp
-
- "sub_1lp: \n\t"
- "movb (%%esi,%%edx,), %%al \n\t"
- "addb %%al, (%%edi,%%edx,) \n\t"
- "incl %%edx \n\t"
- "cmpl _FullLength, %%edx \n\t"
- "jb sub_1lp \n\t"
-
- "sub_1end: \n\t"
-
- : "=a" (dummy_value_a), // 0 // output regs (dummy)
- "=D" (dummy_value_D) // 1
-
- : "0" (bpp), // eax // input regs
- "1" (row) // edi
-
- : "%edx", "%esi" // clobber list
- );
- }
- return;
-
- case 6:
- case 4:
- //case 7: // GRR BOGUS
- //case 5: // GRR BOGUS
- {
- _ShiftBpp.use = bpp << 3;
- _ShiftRem.use = 64 - _ShiftBpp.use;
-
- __asm__ __volatile__ (
-// preload "movl row, %%edi \n\t"
- "movl _dif, %%edx \n\t"
- "movl %%edi, %%esi \n\t" // lp = row
-// preload "movl bpp, %%eax \n\t"
- "addl %%eax, %%edi \n\t" // rp = row + bpp
-
- // prime the pump: load the first Raw(x-bpp) data set
- "movq -8(%%edi,%%edx,), %%mm1 \n\t"
-
- "sub_4lp: \n\t" // shift data for adding first
- "psrlq _ShiftRem, %%mm1 \n\t" // bpp bytes (no need for mask;
- // shift clears inactive bytes)
- "movq (%%edi,%%edx,), %%mm0 \n\t"
- "paddb %%mm1, %%mm0 \n\t"
-
- // add 2nd active group
- "movq %%mm0, %%mm1 \n\t" // mov updated Raws to mm1
- "psllq _ShiftBpp, %%mm1 \n\t" // shift data to pos. correctly
- "addl $8, %%edx \n\t"
- "paddb %%mm1, %%mm0 \n\t"
-
- "cmpl _MMXLength, %%edx \n\t"
- "movq %%mm0, -8(%%edi,%%edx,) \n\t"
- "movq %%mm0, %%mm1 \n\t" // prep 1st add at top of loop
- "jb sub_4lp \n\t"
-
- : "=a" (dummy_value_a), // 0 // output regs (dummy)
- "=D" (dummy_value_D) // 1
-
- : "0" (bpp), // eax // input regs
- "1" (row) // edi
-
- : "%edx", "%esi" // clobber list
-#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
- , "%mm0", "%mm1"
-#endif
- );
- }
- break;
-
- case 2:
- {
- _ActiveMask.use = 0x00000000ffff0000LL;
- _ShiftBpp.use = 16; // == 2 * 8
- _ShiftRem.use = 48; // == 64 - 16
-
- __asm__ __volatile__ (
- "movq _ActiveMask, %%mm7 \n\t" // load _ActiveMask for 2nd
- // active byte group
- "movl _dif, %%edx \n\t"
- "movq %%mm7, %%mm6 \n\t"
-// preload "movl row, %%edi \n\t"
- "psllq _ShiftBpp, %%mm6 \n\t" // move mask in mm6 to cover
- // 3rd active byte group
- "movl %%edi, %%esi \n\t" // lp = row
- "movq %%mm6, %%mm5 \n\t"
-// preload "movl bpp, %%eax \n\t"
- "addl %%eax, %%edi \n\t" // rp = row + bpp
- "psllq _ShiftBpp, %%mm5 \n\t" // move mask in mm5 to cover
- // 4th active byte group
- // prime the pump: load the first Raw(x-bpp) data set
- "movq -8(%%edi,%%edx,), %%mm1 \n\t"
-
- "sub_2lp: \n\t" // shift data for adding first
- "psrlq _ShiftRem, %%mm1 \n\t" // bpp bytes (no need for mask;
- // shift clears inactive bytes)
- // add 1st active group
- "movq (%%edi,%%edx,), %%mm0 \n\t"
- "paddb %%mm1, %%mm0 \n\t"
-
- // add 2nd active group
- "movq %%mm0, %%mm1 \n\t" // mov updated Raws to mm1
- "psllq _ShiftBpp, %%mm1 \n\t" // shift data to pos. correctly
- "pand %%mm7, %%mm1 \n\t" // mask to use 2nd active group
- "paddb %%mm1, %%mm0 \n\t"
-
- // add 3rd active group
- "movq %%mm0, %%mm1 \n\t" // mov updated Raws to mm1
- "psllq _ShiftBpp, %%mm1 \n\t" // shift data to pos. correctly
- "pand %%mm6, %%mm1 \n\t" // mask to use 3rd active group
- "paddb %%mm1, %%mm0 \n\t"
-
- // add 4th active group
- "movq %%mm0, %%mm1 \n\t" // mov updated Raws to mm1
- "psllq _ShiftBpp, %%mm1 \n\t" // shift data to pos. correctly
- "pand %%mm5, %%mm1 \n\t" // mask to use 4th active group
- "addl $8, %%edx \n\t"
- "paddb %%mm1, %%mm0 \n\t"
- "cmpl _MMXLength, %%edx \n\t"
- "movq %%mm0, -8(%%edi,%%edx,) \n\t" // write updated Raws to array
- "movq %%mm0, %%mm1 \n\t" // prep 1st add at top of loop
- "jb sub_2lp \n\t"
-
- : "=a" (dummy_value_a), // 0 // output regs (dummy)
- "=D" (dummy_value_D) // 1
-
- : "0" (bpp), // eax // input regs
- "1" (row) // edi
-
- : "%edx", "%esi" // clobber list
-#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
- , "%mm0", "%mm1", "%mm5", "%mm6", "%mm7"
-#endif
- );
- }
- break;
-
- case 8:
- {
- __asm__ __volatile__ (
-// preload "movl row, %%edi \n\t"
- "movl _dif, %%edx \n\t"
- "movl %%edi, %%esi \n\t" // lp = row
-// preload "movl bpp, %%eax \n\t"
- "addl %%eax, %%edi \n\t" // rp = row + bpp
- "movl _MMXLength, %%ecx \n\t"
-
- // prime the pump: load the first Raw(x-bpp) data set
- "movq -8(%%edi,%%edx,), %%mm7 \n\t"
- "andl $0x0000003f, %%ecx \n\t" // calc bytes over mult of 64
-
- "sub_8lp: \n\t"
- "movq (%%edi,%%edx,), %%mm0 \n\t" // load Sub(x) for 1st 8 bytes
- "paddb %%mm7, %%mm0 \n\t"
- "movq 8(%%edi,%%edx,), %%mm1 \n\t" // load Sub(x) for 2nd 8 bytes
- "movq %%mm0, (%%edi,%%edx,) \n\t" // write Raw(x) for 1st 8 bytes
-
- // Now mm0 will be used as Raw(x-bpp) for the 2nd group of 8 bytes.
- // This will be repeated for each group of 8 bytes with the 8th
- // group being used as the Raw(x-bpp) for the 1st group of the
- // next loop.
-
- "paddb %%mm0, %%mm1 \n\t"
- "movq 16(%%edi,%%edx,), %%mm2 \n\t" // load Sub(x) for 3rd 8 bytes
- "movq %%mm1, 8(%%edi,%%edx,) \n\t" // write Raw(x) for 2nd 8 bytes
- "paddb %%mm1, %%mm2 \n\t"
- "movq 24(%%edi,%%edx,), %%mm3 \n\t" // load Sub(x) for 4th 8 bytes
- "movq %%mm2, 16(%%edi,%%edx,) \n\t" // write Raw(x) for 3rd 8 bytes
- "paddb %%mm2, %%mm3 \n\t"
- "movq 32(%%edi,%%edx,), %%mm4 \n\t" // load Sub(x) for 5th 8 bytes
- "movq %%mm3, 24(%%edi,%%edx,) \n\t" // write Raw(x) for 4th 8 bytes
- "paddb %%mm3, %%mm4 \n\t"
- "movq 40(%%edi,%%edx,), %%mm5 \n\t" // load Sub(x) for 6th 8 bytes
- "movq %%mm4, 32(%%edi,%%edx,) \n\t" // write Raw(x) for 5th 8 bytes
- "paddb %%mm4, %%mm5 \n\t"
- "movq 48(%%edi,%%edx,), %%mm6 \n\t" // load Sub(x) for 7th 8 bytes
- "movq %%mm5, 40(%%edi,%%edx,) \n\t" // write Raw(x) for 6th 8 bytes
- "paddb %%mm5, %%mm6 \n\t"
- "movq 56(%%edi,%%edx,), %%mm7 \n\t" // load Sub(x) for 8th 8 bytes
- "movq %%mm6, 48(%%edi,%%edx,) \n\t" // write Raw(x) for 7th 8 bytes
- "addl $64, %%edx \n\t"
- "paddb %%mm6, %%mm7 \n\t"
- "cmpl %%ecx, %%edx \n\t"
- "movq %%mm7, -8(%%edi,%%edx,) \n\t" // write Raw(x) for 8th 8 bytes
- "jb sub_8lp \n\t"
-
- "cmpl _MMXLength, %%edx \n\t"
- "jnb sub_8lt8 \n\t"
-
- "sub_8lpA: \n\t"
- "movq (%%edi,%%edx,), %%mm0 \n\t"
- "addl $8, %%edx \n\t"
- "paddb %%mm7, %%mm0 \n\t"
- "cmpl _MMXLength, %%edx \n\t"
- "movq %%mm0, -8(%%edi,%%edx,) \n\t" // -8 to offset early addl edx
- "movq %%mm0, %%mm7 \n\t" // move calculated Raw(x) data
- // to mm1 to be new Raw(x-bpp)
- // for next loop
- "jb sub_8lpA \n\t"
-
- "sub_8lt8: \n\t"
-
- : "=a" (dummy_value_a), // 0 // output regs (dummy)
- "=D" (dummy_value_D) // 1
-
- : "0" (bpp), // eax // input regs
- "1" (row) // edi
-
- : "%ecx", "%edx", "%esi" // clobber list
-#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
- , "%mm0", "%mm1", "%mm2", "%mm3", "%mm4", "%mm5", "%mm6", "%mm7"
-#endif
- );
- }
- break;
-
- default: // bpp greater than 8 bytes GRR BOGUS
- {
- __asm__ __volatile__ (
- "movl _dif, %%edx \n\t"
-// preload "movl row, %%edi \n\t"
- "movl %%edi, %%esi \n\t" // lp = row
-// preload "movl bpp, %%eax \n\t"
- "addl %%eax, %%edi \n\t" // rp = row + bpp
-
- "sub_Alp: \n\t"
- "movq (%%edi,%%edx,), %%mm0 \n\t"
- "movq (%%esi,%%edx,), %%mm1 \n\t"
- "addl $8, %%edx \n\t"
- "paddb %%mm1, %%mm0 \n\t"
- "cmpl _MMXLength, %%edx \n\t"
- "movq %%mm0, -8(%%edi,%%edx,) \n\t" // mov does not affect flags;
- // -8 to offset addl edx
- "jb sub_Alp \n\t"
-
- : "=a" (dummy_value_a), // 0 // output regs (dummy)
- "=D" (dummy_value_D) // 1
-
- : "0" (bpp), // eax // input regs
- "1" (row) // edi
-
- : "%edx", "%esi" // clobber list
-#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
- , "%mm0", "%mm1"
-#endif
- );
- }
- break;
-
- } // end switch (bpp)
-
- __asm__ __volatile__ (
- "movl _MMXLength, %%edx \n\t"
-//pre "movl row, %%edi \n\t"
- "cmpl _FullLength, %%edx \n\t"
- "jnb sub_end \n\t"
-
- "movl %%edi, %%esi \n\t" // lp = row
-//pre "movl bpp, %%eax \n\t"
- "addl %%eax, %%edi \n\t" // rp = row + bpp
- "xorl %%eax, %%eax \n\t"
-
- "sub_lp2: \n\t"
- "movb (%%esi,%%edx,), %%al \n\t"
- "addb %%al, (%%edi,%%edx,) \n\t"
- "incl %%edx \n\t"
- "cmpl _FullLength, %%edx \n\t"
- "jb sub_lp2 \n\t"
-
- "sub_end: \n\t"
- "EMMS \n\t" // end MMX instructions
-
- : "=a" (dummy_value_a), // 0 // output regs (dummy)
- "=D" (dummy_value_D) // 1
-
- : "0" (bpp), // eax // input regs
- "1" (row) // edi
-
- : "%edx", "%esi" // clobber list
- );
-
-} // end of png_read_filter_row_mmx_sub()
-#endif
-
-
-
-
-//===========================================================================//
-// //
-// P N G _ R E A D _ F I L T E R _ R O W _ M M X _ U P //
-// //
-//===========================================================================//
-
-// Optimized code for PNG Up filter decoder
-
-static void /* PRIVATE */
-png_read_filter_row_mmx_up(png_row_infop row_info, png_bytep row,
- png_bytep prev_row)
-{
- png_uint_32 len;
- int dummy_value_d; // fix 'forbidden register 3 (dx) was spilled' error
- int dummy_value_S;
- int dummy_value_D;
-
- len = row_info->rowbytes; // number of bytes to filter
-
- __asm__ __volatile__ (
-//pre "movl row, %%edi \n\t"
- // get # of bytes to alignment
- "movl %%edi, %%ecx \n\t"
- "xorl %%ebx, %%ebx \n\t"
- "addl $0x7, %%ecx \n\t"
- "xorl %%eax, %%eax \n\t"
- "andl $0xfffffff8, %%ecx \n\t"
-//pre "movl prev_row, %%esi \n\t"
- "subl %%edi, %%ecx \n\t"
- "jz up_go \n\t"
-
- "up_lp1: \n\t" // fix alignment
- "movb (%%edi,%%ebx,), %%al \n\t"
- "addb (%%esi,%%ebx,), %%al \n\t"
- "incl %%ebx \n\t"
- "cmpl %%ecx, %%ebx \n\t"
- "movb %%al, -1(%%edi,%%ebx,) \n\t" // mov does not affect flags; -1 to
- "jb up_lp1 \n\t" // offset incl ebx
-
- "up_go: \n\t"
-//pre "movl len, %%edx \n\t"
- "movl %%edx, %%ecx \n\t"
- "subl %%ebx, %%edx \n\t" // subtract alignment fix
- "andl $0x0000003f, %%edx \n\t" // calc bytes over mult of 64
- "subl %%edx, %%ecx \n\t" // drop over bytes from length
-
- // unrolled loop - use all MMX registers and interleave to reduce
- // number of branch instructions (loops) and reduce partial stalls
- "up_loop: \n\t"
- "movq (%%esi,%%ebx,), %%mm1 \n\t"
- "movq (%%edi,%%ebx,), %%mm0 \n\t"
- "movq 8(%%esi,%%ebx,), %%mm3 \n\t"
- "paddb %%mm1, %%mm0 \n\t"
- "movq 8(%%edi,%%ebx,), %%mm2 \n\t"
- "movq %%mm0, (%%edi,%%ebx,) \n\t"
- "paddb %%mm3, %%mm2 \n\t"
- "movq 16(%%esi,%%ebx,), %%mm5 \n\t"
- "movq %%mm2, 8(%%edi,%%ebx,) \n\t"
- "movq 16(%%edi,%%ebx,), %%mm4 \n\t"
- "movq 24(%%esi,%%ebx,), %%mm7 \n\t"
- "paddb %%mm5, %%mm4 \n\t"
- "movq 24(%%edi,%%ebx,), %%mm6 \n\t"
- "movq %%mm4, 16(%%edi,%%ebx,) \n\t"
- "paddb %%mm7, %%mm6 \n\t"
- "movq 32(%%esi,%%ebx,), %%mm1 \n\t"
- "movq %%mm6, 24(%%edi,%%ebx,) \n\t"
- "movq 32(%%edi,%%ebx,), %%mm0 \n\t"
- "movq 40(%%esi,%%ebx,), %%mm3 \n\t"
- "paddb %%mm1, %%mm0 \n\t"
- "movq 40(%%edi,%%ebx,), %%mm2 \n\t"
- "movq %%mm0, 32(%%edi,%%ebx,) \n\t"
- "paddb %%mm3, %%mm2 \n\t"
- "movq 48(%%esi,%%ebx,), %%mm5 \n\t"
- "movq %%mm2, 40(%%edi,%%ebx,) \n\t"
- "movq 48(%%edi,%%ebx,), %%mm4 \n\t"
- "movq 56(%%esi,%%ebx,), %%mm7 \n\t"
- "paddb %%mm5, %%mm4 \n\t"
- "movq 56(%%edi,%%ebx,), %%mm6 \n\t"
- "movq %%mm4, 48(%%edi,%%ebx,) \n\t"
- "addl $64, %%ebx \n\t"
- "paddb %%mm7, %%mm6 \n\t"
- "cmpl %%ecx, %%ebx \n\t"
- "movq %%mm6, -8(%%edi,%%ebx,) \n\t" // (+56)movq does not affect flags;
- "jb up_loop \n\t" // -8 to offset addl ebx
-
- "cmpl $0, %%edx \n\t" // test for bytes over mult of 64
- "jz up_end \n\t"
-
- "cmpl $8, %%edx \n\t" // test for less than 8 bytes
- "jb up_lt8 \n\t" // [added by lcreeve@netins.net]
-
- "addl %%edx, %%ecx \n\t"
- "andl $0x00000007, %%edx \n\t" // calc bytes over mult of 8
- "subl %%edx, %%ecx \n\t" // drop over bytes from length
- "jz up_lt8 \n\t"
-
- "up_lpA: \n\t" // use MMX regs to update 8 bytes sim.
- "movq (%%esi,%%ebx,), %%mm1 \n\t"
- "movq (%%edi,%%ebx,), %%mm0 \n\t"
- "addl $8, %%ebx \n\t"
- "paddb %%mm1, %%mm0 \n\t"
- "cmpl %%ecx, %%ebx \n\t"
- "movq %%mm0, -8(%%edi,%%ebx,) \n\t" // movq does not affect flags; -8 to
- "jb up_lpA \n\t" // offset add ebx
- "cmpl $0, %%edx \n\t" // test for bytes over mult of 8
- "jz up_end \n\t"
-
- "up_lt8: \n\t"
- "xorl %%eax, %%eax \n\t"
- "addl %%edx, %%ecx \n\t" // move over byte count into counter
-
- "up_lp2: \n\t" // use x86 regs for remaining bytes
- "movb (%%edi,%%ebx,), %%al \n\t"
- "addb (%%esi,%%ebx,), %%al \n\t"
- "incl %%ebx \n\t"
- "cmpl %%ecx, %%ebx \n\t"
- "movb %%al, -1(%%edi,%%ebx,) \n\t" // mov does not affect flags; -1 to
- "jb up_lp2 \n\t" // offset inc ebx
-
- "up_end: \n\t"
- "EMMS \n\t" // conversion of filtered row complete
-
- : "=d" (dummy_value_d), // 0 // output regs (dummy)
- "=S" (dummy_value_S), // 1
- "=D" (dummy_value_D) // 2
-
- : "0" (len), // edx // input regs
- "1" (prev_row), // esi
- "2" (row) // edi
-
- : "%eax", "%ebx", "%ecx" // clobber list (no input regs!)
-
-#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
- , "%mm0", "%mm1", "%mm2", "%mm3"
- , "%mm4", "%mm5", "%mm6", "%mm7"
-#endif
- );
-
-} // end of png_read_filter_row_mmx_up()
-
-#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
-
-
-
-
-/*===========================================================================*/
-/* */
-/* P N G _ R E A D _ F I L T E R _ R O W */
-/* */
-/*===========================================================================*/
-
-
-/* Optimized png_read_filter_row routines */
-
-void /* PRIVATE */
-png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
- row, png_bytep prev_row, int filter)
-{
-#ifdef PNG_DEBUG
- char filnm[10];
-#endif
-
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
-/* GRR: these are superseded by png_ptr->asm_flags: */
-#define UseMMX_sub 1 // GRR: converted 20000730
-#define UseMMX_up 1 // GRR: converted 20000729
-#define UseMMX_avg 1 // GRR: converted 20000828 (+ 16-bit bugfix 20000916)
-#define UseMMX_paeth 1 // GRR: converted 20000828
-
- if (_mmx_supported == 2) {
- /* this should have happened in png_init_mmx_flags() already */
- png_warning(png_ptr, "asm_flags may not have been initialized");
- png_mmx_support();
- }
-#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
-
-#ifdef PNG_DEBUG
- png_debug(1, "in png_read_filter_row (pnggccrd.c)\n");
- switch (filter)
- {
- case 0: sprintf(filnm, "none");
- break;
- case 1: sprintf(filnm, "sub-%s",
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
- (png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_SUB)? "MMX" :
-#endif
-"x86");
- break;
- case 2: sprintf(filnm, "up-%s",
-#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
- (png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_UP)? "MMX" :
-#endif
- "x86");
- break;
- case 3: sprintf(filnm, "avg-%s",
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
- (png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_AVG)? "MMX" :
-#endif
- "x86");
- break;
- case 4: sprintf(filnm, "Paeth-%s",
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
- (png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_PAETH)? "MMX":
-#endif
-"x86");
- break;
- default: sprintf(filnm, "unknw");
- break;
- }
- png_debug2(0, "row_number=%5ld, %5s, ", png_ptr->row_number, filnm);
- png_debug1(0, "row=0x%08lx, ", (unsigned long)row);
- png_debug2(0, "pixdepth=%2d, bytes=%d, ", (int)row_info->pixel_depth,
- (int)((row_info->pixel_depth + 7) >> 3));
- png_debug1(0,"rowbytes=%8ld\n", row_info->rowbytes);
-#endif /* PNG_DEBUG */
-
- switch (filter)
- {
- case PNG_FILTER_VALUE_NONE:
- break;
-
- case PNG_FILTER_VALUE_SUB:
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
- if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_SUB) &&
- (row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) &&
- (row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold))
- {
- png_read_filter_row_mmx_sub(row_info, row);
- }
- else
-#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
- {
- png_uint_32 i;
- png_uint_32 istop = row_info->rowbytes;
- png_uint_32 bpp = (row_info->pixel_depth + 7) >> 3;
- png_bytep rp = row + bpp;
- png_bytep lp = row;
-
- for (i = bpp; i < istop; i++)
- {
- *rp = (png_byte)(((int)(*rp) + (int)(*lp++)) & 0xff);
- rp++;
- }
- } /* end !UseMMX_sub */
- break;
-
- case PNG_FILTER_VALUE_UP:
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
- if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_UP) &&
- (row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) &&
- (row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold))
- {
- png_read_filter_row_mmx_up(row_info, row, prev_row);
- }
- else
-#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
- {
- png_uint_32 i;
- png_uint_32 istop = row_info->rowbytes;
- png_bytep rp = row;
- png_bytep pp = prev_row;
-
- for (i = 0; i < istop; ++i)
- {
- *rp = (png_byte)(((int)(*rp) + (int)(*pp++)) & 0xff);
- rp++;
- }
- } /* end !UseMMX_up */
- break;
-
- case PNG_FILTER_VALUE_AVG:
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
- if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_AVG) &&
- (row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) &&
- (row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold))
- {
- png_read_filter_row_mmx_avg(row_info, row, prev_row);
- }
- else
-#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
- {
- png_uint_32 i;
- png_bytep rp = row;
- png_bytep pp = prev_row;
- png_bytep lp = row;
- png_uint_32 bpp = (row_info->pixel_depth + 7) >> 3;
- png_uint_32 istop = row_info->rowbytes - bpp;
-
- for (i = 0; i < bpp; i++)
- {
- *rp = (png_byte)(((int)(*rp) +
- ((int)(*pp++) >> 1)) & 0xff);
- rp++;
- }
-
- for (i = 0; i < istop; i++)
- {
- *rp = (png_byte)(((int)(*rp) +
- ((int)(*pp++ + *lp++) >> 1)) & 0xff);
- rp++;
- }
- } /* end !UseMMX_avg */
- break;
-
- case PNG_FILTER_VALUE_PAETH:
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
- if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_PAETH) &&
- (row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) &&
- (row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold))
- {
- png_read_filter_row_mmx_paeth(row_info, row, prev_row);
- }
- else
-#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
- {
- png_uint_32 i;
- png_bytep rp = row;
- png_bytep pp = prev_row;
- png_bytep lp = row;
- png_bytep cp = prev_row;
- png_uint_32 bpp = (row_info->pixel_depth + 7) >> 3;
- png_uint_32 istop = row_info->rowbytes - bpp;
-
- for (i = 0; i < bpp; i++)
- {
- *rp = (png_byte)(((int)(*rp) + (int)(*pp++)) & 0xff);
- rp++;
- }
-
- for (i = 0; i < istop; i++) /* use leftover rp,pp */
- {
- int a, b, c, pa, pb, pc, p;
-
- a = *lp++;
- b = *pp++;
- c = *cp++;
-
- p = b - c;
- pc = a - c;
-
-#ifdef PNG_USE_ABS
- pa = abs(p);
- pb = abs(pc);
- pc = abs(p + pc);
-#else
- pa = p < 0 ? -p : p;
- pb = pc < 0 ? -pc : pc;
- pc = (p + pc) < 0 ? -(p + pc) : p + pc;
-#endif
-
- /*
- if (pa <= pb && pa <= pc)
- p = a;
- else if (pb <= pc)
- p = b;
- else
- p = c;
- */
-
- p = (pa <= pb && pa <= pc) ? a : (pb <= pc) ? b : c;
-
- *rp = (png_byte)(((int)(*rp) + p) & 0xff);
- rp++;
- }
- } /* end !UseMMX_paeth */
- break;
-
- default:
- png_warning(png_ptr, "Ignoring bad row-filter type");
- *row=0;
- break;
- }
-}
-
-#endif /* PNG_HAVE_ASSEMBLER_READ_FILTER_ROW */
-
-
-/*===========================================================================*/
-/* */
-/* P N G _ M M X _ S U P P O R T */
-/* */
-/*===========================================================================*/
-
-/* GRR NOTES: (1) the following code assumes 386 or better (pushfl/popfl)
- * (2) all instructions compile with gcc 2.7.2.3 and later
- * (3) the function is moved down here to prevent gcc from
- * inlining it in multiple places and then barfing be-
- * cause the ".NOT_SUPPORTED" label is multiply defined
- * [is there a way to signal that a *single* function should
- * not be inlined? is there a way to modify the label for
- * each inlined instance, e.g., by appending _1, _2, etc.?
- * maybe if don't use leading "." in label name? (nope...sigh)]
- */
-
-int PNGAPI
-png_mmx_support(void)
-{
-#if defined(PNG_MMX_CODE_SUPPORTED)
- __asm__ __volatile__ (
- "pushl %%ebx \n\t" // ebx gets clobbered by CPUID instruction
- "pushl %%ecx \n\t" // so does ecx...
- "pushl %%edx \n\t" // ...and edx (but ecx & edx safe on Linux)
-// ".byte 0x66 \n\t" // convert 16-bit pushf to 32-bit pushfd
-// "pushf \n\t" // 16-bit pushf
- "pushfl \n\t" // save Eflag to stack
- "popl %%eax \n\t" // get Eflag from stack into eax
- "movl %%eax, %%ecx \n\t" // make another copy of Eflag in ecx
- "xorl $0x200000, %%eax \n\t" // toggle ID bit in Eflag (i.e., bit 21)
- "pushl %%eax \n\t" // save modified Eflag back to stack
-// ".byte 0x66 \n\t" // convert 16-bit popf to 32-bit popfd
-// "popf \n\t" // 16-bit popf
- "popfl \n\t" // restore modified value to Eflag reg
- "pushfl \n\t" // save Eflag to stack
- "popl %%eax \n\t" // get Eflag from stack
- "xorl %%ecx, %%eax \n\t" // compare new Eflag with original Eflag
- "jz .NOT_SUPPORTED \n\t" // if same, CPUID instr. is not supported
-
- "xorl %%eax, %%eax \n\t" // set eax to zero
-// ".byte 0x0f, 0xa2 \n\t" // CPUID instruction (two-byte opcode)
- "cpuid \n\t" // get the CPU identification info
- "cmpl $1, %%eax \n\t" // make sure eax return non-zero value
- "jl .NOT_SUPPORTED \n\t" // if eax is zero, MMX is not supported
-
- "xorl %%eax, %%eax \n\t" // set eax to zero and...
- "incl %%eax \n\t" // ...increment eax to 1. This pair is
- // faster than the instruction "mov eax, 1"
- "cpuid \n\t" // get the CPU identification info again
- "andl $0x800000, %%edx \n\t" // mask out all bits but MMX bit (23)
- "cmpl $0, %%edx \n\t" // 0 = MMX not supported
- "jz .NOT_SUPPORTED \n\t" // non-zero = yes, MMX IS supported
-
- "movl $1, %%eax \n\t" // set return value to 1
- "jmp .RETURN \n\t" // DONE: have MMX support
-
- ".NOT_SUPPORTED: \n\t" // target label for jump instructions
- "movl $0, %%eax \n\t" // set return value to 0
- ".RETURN: \n\t" // target label for jump instructions
- "movl %%eax, _mmx_supported \n\t" // save in global static variable, too
- "popl %%edx \n\t" // restore edx
- "popl %%ecx \n\t" // restore ecx
- "popl %%ebx \n\t" // restore ebx
-
-// "ret \n\t" // DONE: no MMX support
- // (fall through to standard C "ret")
-
- : // output list (none)
-
- : // any variables used on input (none)
-
- : "%eax" // clobber list
-// , "%ebx", "%ecx", "%edx" // GRR: we handle these manually
-// , "memory" // if write to a variable gcc thought was in a reg
-// , "cc" // "condition codes" (flag bits)
- );
-#else
- _mmx_supported = 0;
-#endif /* PNG_MMX_CODE_SUPPORTED */
-
- return _mmx_supported;
-}
-
-
-#endif /* PNG_USE_PNGGCCRD */
projects / rrdtool.git / blobdiff