| /* 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 1.0.9 - January 31, 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_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_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" |
| * |
| * 20010103: |
| * - renamed mmxsupport() to png_mmx_support(), with auto-set of mmx_supported, |
| * and made it public |
| * |
| * 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 |
| * |
| * 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) |
| * - add support for runtime enable/disable/query of various MMX routines |
| */ |
| |
| //#define PNG_DEBUG 2 // GRR |
| |
| #define PNG_INTERNAL |
| #include "png.h" |
| |
| #if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_USE_PNGGCCRD) |
| |
| #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 |
| |
| // 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 _unmask unmask |
| # 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 _FullLength FullLength |
| # define _MMXLength MMXLength |
| # define _dif dif |
| # define _LBCarryMask LBCarryMask |
| # define _HBClearMask HBClearMask |
| # define _ActiveMask ActiveMask |
| # define _ActiveMask2 ActiveMask2 |
| # define _ActiveMaskEnd ActiveMaskEnd |
| # define _ShiftBpp ShiftBpp |
| # define _ShiftRem ShiftRem |
| # define _patemp patemp |
| # define _pbtemp pbtemp |
| # define _pctemp pctemp |
| #endif |
| |
| static int _mmx_supported = 2; |
| |
| /* 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. |
| */ |
| static int _unmask; |
| |
| 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. |
| |
| 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; |
| |
| |
| |
| |
| //===========================================================================// |
| // // |
| // P N G _ C O M B I N E _ R O W // |
| // // |
| //===========================================================================// |
| |
| #if defined(PNG_HAVE_ASSEMBLER_COMBINE_ROW) |
| |
| /* 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_asm\n"); |
| |
| if (_mmx_supported == 2) { |
| png_mmx_support(); |
| } |
| |
| if (mask == 0xff) |
| { |
| png_memcpy(row, png_ptr->row_buf + 1, |
| (png_size_t)((png_ptr->width * png_ptr->row_info.pixel_depth + 7) >> 3)); |
| } |
| /* GRR: png_combine_row() never called with mask == 0 */ |
| else |
| { |
| 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 ( _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 = 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 */ |
| { |
| 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}; |
| register png_uint_32 final_val = png_ptr->width; |
| |
| 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; |
| } |
| } /* end of else */ |
| |
| break; |
| } // end 8 bpp |
| |
| case 16: // png_ptr->row_info.pixel_depth |
| { |
| png_bytep srcptr; |
| png_bytep dstptr; |
| |
| if ( _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 = 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 */ |
| { |
| register png_uint_32 i; |
| png_uint_32 initial_val = 2 * png_pass_start[png_ptr->pass]; |
| // png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; |
| register int stride = 2 * png_pass_inc[png_ptr->pass]; |
| // png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; |
| register int rep_bytes = 2 * png_pass_width[png_ptr->pass]; |
| // png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; |
| register png_uint_32 final_val = 2 * png_ptr->width; |
| |
| 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; |
| } |
| } /* end of else */ |
| |
| break; |
| } // end 16 bpp |
| |
| case 24: // png_ptr->row_info.pixel_depth |
| { |
| png_bytep srcptr; |
| png_bytep dstptr; |
| |
| if ( _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 = 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 */ |
| { |
| register png_uint_32 i; |
| png_uint_32 initial_val = 3 * png_pass_start[png_ptr->pass]; |
| // png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; |
| register int stride = 3 * png_pass_inc[png_ptr->pass]; |
| // png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; |
| register int rep_bytes = 3 * png_pass_width[png_ptr->pass]; |
| // png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; |
| register png_uint_32 final_val = 3 * png_ptr->width; |
| |
| 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; |
| } |
| } /* end of else */ |
| |
| break; |
| } // end 24 bpp |
| |
| case 32: // png_ptr->row_info.pixel_depth |
| { |
| png_bytep srcptr; |
| png_bytep dstptr; |
| |
| if ( _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 = 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 */ |
| { |
| register png_uint_32 i; |
| png_uint_32 initial_val = 4 * png_pass_start[png_ptr->pass]; |
| // png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; |
| register int stride = 4 * png_pass_inc[png_ptr->pass]; |
| // png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; |
| register int rep_bytes = 4 * png_pass_width[png_ptr->pass]; |
| // png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; |
| register png_uint_32 final_val = 4 * png_ptr->width; |
| |
| 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; |
| } |
| } /* end of else */ |
| |
| break; |
| } // end 32 bpp |
| |
| case 48: // png_ptr->row_info.pixel_depth |
| { |
| png_bytep srcptr; |
| png_bytep dstptr; |
| |
| if ( _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 = 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 */ |
| { |
| register png_uint_32 i; |
| png_uint_32 initial_val = 6 * png_pass_start[png_ptr->pass]; |
| // png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; |
| register int stride = 6 * png_pass_inc[png_ptr->pass]; |
| // png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; |
| register int rep_bytes = 6 * png_pass_width[png_ptr->pass]; |
| // png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; |
| register png_uint_32 final_val = 6 * png_ptr->width; |
| |
| 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; |
| } |
| } /* end of else */ |
| |
| 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 = 8 * png_pass_start[png_ptr->pass]; |
| // png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; |
| register int stride = 8 * png_pass_inc[png_ptr->pass]; |
| // png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; |
| register int rep_bytes = 8 * png_pass_width[png_ptr->pass]; |
| // png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; |
| register png_uint_32 final_val = 8 * png_ptr->width; |
| |
| 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; |
| } |
| break; |
| } // end 64 bpp |
| |
| default: // png_ptr->row_info.pixel_depth != 1,2,4,8,16,24,32,48,64 |
| { |
| // this should never happen |
| fprintf(stderr, |
| "libpng internal error: png_ptr->row_info.pixel_depth = %d\n", |
| png_ptr->row_info.pixel_depth); |
| fflush(stderr); |
| 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; |
| png_uint_32 transformations = png_ptr->transformations; |
| |
| png_debug(1,"in png_do_read_interlace\n"); |
| |
| if (_mmx_supported == 2) { |
| png_mmx_support(); |
| } |
| |
| 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) |
| { |
| // 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 |
| png_bytep sptr, dp; |
| png_uint_32 i; |
| png_size_t pixel_bytes; |
| int width = 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 ( _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 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 */ |
| { |
| 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++) |
| { |
| 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 */ |
| |
| |
| |
| |
| // 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; |
| |
| |
| |
| |
| //===========================================================================// |
| // // |
| // 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) |
| { |
| |
| // GRR: PRINT ERROR HERE: SHOULD NEVER BE REACHED |
| fprintf(stderr, |
| "libpng: internal logic error (png_read_filter_row_mmx_avg())\n"); |
| |
| #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() */ |
| |
| |
| |
| |
| //===========================================================================// |
| // // |
| // 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() */ |
| |
| |
| |
| |
| //===========================================================================// |
| // // |
| // 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() |
| |
| |
| |
| |
| //===========================================================================// |
| // // |
| // 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() |
| |
| |
| |
| |
| //===========================================================================// |
| // // |
| // P N G _ R E A D _ F I L T E R _ R O W // |
| // // |
| //===========================================================================// |
| |
| #if defined(PNG_HAVE_ASSEMBLER_READ_FILTER_ROW) |
| |
| // 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 |
| |
| /* 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) { |
| png_mmx_support(); |
| } |
| |
| #ifdef PNG_DEBUG |
| png_debug(1, "in png_read_filter_row\n"); |
| switch (filter) |
| { |
| case 0: sprintf(filnm, "none"); |
| break; |
| case 1: sprintf(filnm, "sub-%s", "MMX"); |
| break; |
| case 2: sprintf(filnm, "up-%s", "MMX"); |
| break; |
| case 3: sprintf(filnm, "avg-%s", "MMX"); |
| break; |
| case 4: sprintf(filnm, "Paeth-%s", "MMX"); |
| 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 ( |
| (row_info->pixel_depth >= PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT) && |
| (row_info->rowbytes >= PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT)) |
| { |
| png_read_filter_row_mmx_sub(row_info, row); |
| } |
| else |
| { |
| 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 ( |
| (row_info->pixel_depth >= PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT) && |
| (row_info->rowbytes >= PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT)) |
| { |
| png_read_filter_row_mmx_up(row_info, row, prev_row); |
| } |
| else |
| { |
| 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 ( |
| (row_info->pixel_depth >= PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT) && |
| (row_info->rowbytes >= PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT)) |
| { |
| png_read_filter_row_mmx_avg(row_info, row, prev_row); |
| } |
| else |
| { |
| 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 ( |
| (row_info->pixel_depth >= PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT) && |
| (row_info->rowbytes >= PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT)) |
| { |
| png_read_filter_row_mmx_paeth(row_info, row, prev_row); |
| } |
| else |
| { |
| 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)] |
| |
| // GRR TO DO: make sure PNGAPI doesn't do/require anything screwy here |
| // [looks OK for everybody except possibly Cygwin (__cdecl)] |
| |
| int PNGAPI |
| png_mmx_support(void) |
| { |
| __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 |
| "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 ("row" in png_do_interlace) |
| "ret \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 |
| "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 ("row" in png_do_interlace) |
| // "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) |
| ); |
| |
| // return %%eax; |
| } |
| |
| #endif /* PNG_ASSEMBLER_CODE_SUPPORTED && PNG_USE_PNGGCCRD */ |