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[libpng10] Imported from libpng-1.0.19rc1.tar
This commit is contained in:
Glenn Randers-Pehrson
52
pnggccrd.c
52
pnggccrd.c
@@ -1,3 +1,4 @@
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/* pnggccrd.c - mixed C/assembler version of utilities to read a PNG file
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*
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* For Intel x86 CPU (Pentium-MMX or later) and GNU C compiler.
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@@ -6,9 +7,9 @@
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* and http://www.intel.com/drg/pentiumII/appnotes/923/923.htm
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* for Intel's performance analysis of the MMX vs. non-MMX code.
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*
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* libpng version 1.0.18 - December 3, 2004
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* Last changed in libpng 1.2.9 April 14, 2006
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* For conditions of distribution and use, see copyright notice in png.h
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* Copyright (c) 1998-2004 Glenn Randers-Pehrson
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* Copyright (c) 1998-2006 Glenn Randers-Pehrson
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* Copyright (c) 1998, Intel Corporation
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*
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* Based on MSVC code contributed by Nirav Chhatrapati, Intel Corp., 1998.
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@@ -255,9 +256,10 @@ static const int FARDATA png_pass_width[7] = {8, 4, 4, 2, 2, 1, 1};
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#endif
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#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
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/* djgpp, Win32, and Cygwin add their own underscores to global variables,
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/* djgpp, Win32, Cygwin, and OS2 add their own underscores to global variables,
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* so define them without: */
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#if defined(__DJGPP__) || defined(WIN32) || defined(__CYGWIN__)
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#if defined(__DJGPP__) || defined(WIN32) || defined(__CYGWIN__) || \
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defined(__OS2__)
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# define _mmx_supported mmx_supported
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# define _const4 const4
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# define _const6 const6
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@@ -1737,6 +1739,7 @@ png_do_read_interlace(png_structp png_ptr)
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int dummy_value_c; // fix 'forbidden register spilled'
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int dummy_value_S;
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int dummy_value_D;
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int dummy_value_a;
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__asm__ __volatile__ (
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"subl $21, %%edi \n\t"
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@@ -1744,7 +1747,7 @@ png_do_read_interlace(png_structp png_ptr)
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".loop3_pass0: \n\t"
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"movd (%%esi), %%mm0 \n\t" // x x x x x 2 1 0
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"pand _const4, %%mm0 \n\t" // z z z z z 2 1 0
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"pand (%3), %%mm0 \n\t" // z z z z z 2 1 0
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"movq %%mm0, %%mm1 \n\t" // z z z z z 2 1 0
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"psllq $16, %%mm0 \n\t" // z z z 2 1 0 z z
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"movq %%mm0, %%mm2 \n\t" // z z z 2 1 0 z z
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@@ -1769,12 +1772,14 @@ png_do_read_interlace(png_structp png_ptr)
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: "=c" (dummy_value_c), // output regs (dummy)
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"=S" (dummy_value_S),
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"=D" (dummy_value_D)
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"=D" (dummy_value_D),
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"=a" (dummy_value_a)
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: "1" (sptr), // esi // input regs
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"2" (dp), // edi
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"0" (width), // ecx
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"rim" (_const4) // %1(?) (0x0000000000FFFFFFLL)
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"3" (&_const4) // %1(?) (0x0000000000FFFFFFLL)
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#if 0 /* %mm0, ..., %mm4 not supported by gcc 2.7.2.3 or egcs 1.1 */
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: "%mm0", "%mm1", "%mm2" // clobber list
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@@ -1787,6 +1792,7 @@ png_do_read_interlace(png_structp png_ptr)
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int dummy_value_c; // fix 'forbidden register spilled'
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int dummy_value_S;
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int dummy_value_D;
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int dummy_value_a;
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__asm__ __volatile__ (
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"subl $9, %%edi \n\t"
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@@ -1794,7 +1800,7 @@ png_do_read_interlace(png_structp png_ptr)
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".loop3_pass2: \n\t"
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"movd (%%esi), %%mm0 \n\t" // x x x x x 2 1 0
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"pand _const4, %%mm0 \n\t" // z z z z z 2 1 0
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"pand (%3), %%mm0 \n\t" // z z z z z 2 1 0
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"movq %%mm0, %%mm1 \n\t" // z z z z z 2 1 0
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"psllq $16, %%mm0 \n\t" // z z z 2 1 0 z z
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"movq %%mm0, %%mm2 \n\t" // z z z 2 1 0 z z
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@@ -1813,12 +1819,13 @@ png_do_read_interlace(png_structp png_ptr)
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: "=c" (dummy_value_c), // output regs (dummy)
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"=S" (dummy_value_S),
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"=D" (dummy_value_D)
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"=D" (dummy_value_D),
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"=a" (dummy_value_a)
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: "1" (sptr), // esi // input regs
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"2" (dp), // edi
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"0" (width), // ecx
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"rim" (_const4) // (0x0000000000FFFFFFLL)
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"3" (&_const4) // (0x0000000000FFFFFFLL)
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#if 0 /* %mm0, ..., %mm2 not supported by gcc 2.7.2.3 or egcs 1.1 */
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: "%mm0", "%mm1", "%mm2" // clobber list
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@@ -1839,6 +1846,8 @@ png_do_read_interlace(png_structp png_ptr)
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int dummy_value_c; // fix 'forbidden register spilled'
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int dummy_value_S;
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int dummy_value_D;
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int dummy_value_a;
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int dummy_value_d;
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__asm__ __volatile__ (
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"subl $3, %%esi \n\t"
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@@ -1850,14 +1859,14 @@ png_do_read_interlace(png_structp png_ptr)
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"movq %%mm0, %%mm1 \n\t" // x x 5 4 3 2 1 0
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"movq %%mm0, %%mm2 \n\t" // x x 5 4 3 2 1 0
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"psllq $24, %%mm0 \n\t" // 4 3 2 1 0 z z z
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"pand _const4, %%mm1 \n\t" // z z z z z 2 1 0
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"pand (%3), %%mm1 \n\t" // z z z z z 2 1 0
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"psrlq $24, %%mm2 \n\t" // z z z x x 5 4 3
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"por %%mm1, %%mm0 \n\t" // 4 3 2 1 0 2 1 0
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"movq %%mm2, %%mm3 \n\t" // z z z x x 5 4 3
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"psllq $8, %%mm2 \n\t" // z z x x 5 4 3 z
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"movq %%mm0, (%%edi) \n\t"
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"psrlq $16, %%mm3 \n\t" // z z z z z x x 5
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"pand _const6, %%mm3 \n\t" // z z z z z z z 5
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"pand (%4), %%mm3 \n\t" // z z z z z z z 5
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"por %%mm3, %%mm2 \n\t" // z z x x 5 4 3 5
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"subl $6, %%esi \n\t"
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"movd %%mm2, 8(%%edi) \n\t"
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@@ -1868,13 +1877,15 @@ png_do_read_interlace(png_structp png_ptr)
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: "=c" (dummy_value_c), // output regs (dummy)
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"=S" (dummy_value_S),
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"=D" (dummy_value_D)
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"=D" (dummy_value_D),
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"=a" (dummy_value_a),
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"=d" (dummy_value_d)
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: "1" (sptr), // esi // input regs
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"2" (dp), // edi
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"0" (width_mmx), // ecx
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"rim" (_const4), // 0x0000000000FFFFFFLL
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"rim" (_const6) // 0x00000000000000FFLL
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"3" (&_const4), // 0x0000000000FFFFFFLL
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"4" (&_const6) // 0x00000000000000FFLL
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#if 0 /* %mm0, ..., %mm3 not supported by gcc 2.7.2.3 or egcs 1.1 */
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: "%mm0", "%mm1" // clobber list
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@@ -5102,7 +5113,7 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
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case 1: sprintf(filnm, "sub-%s",
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#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
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#if !defined(PNG_1_0_X)
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(png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_SUB)? "MMX" :
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(png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_SUB)? "MMX" :
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#endif
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#endif
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"x86");
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@@ -5339,6 +5350,7 @@ int PNGAPI
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png_mmx_support(void)
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{
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#if defined(PNG_MMX_CODE_SUPPORTED)
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int result;
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__asm__ __volatile__ (
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"pushl %%ebx \n\t" // ebx gets clobbered by CPUID instruction
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"pushl %%ecx \n\t" // so does ecx...
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@@ -5380,7 +5392,6 @@ png_mmx_support(void)
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"0: \n\t" // .NOT_SUPPORTED: target label for jump instructions
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"movl $0, %%eax \n\t" // set return value to 0
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"1: \n\t" // .RETURN: target label for jump instructions
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"movl %%eax, _mmx_supported \n\t" // save in global static variable, too
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"popl %%edx \n\t" // restore edx
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"popl %%ecx \n\t" // restore ecx
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"popl %%ebx \n\t" // restore ebx
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@@ -5388,16 +5399,17 @@ png_mmx_support(void)
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// "ret \n\t" // DONE: no MMX support
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// (fall through to standard C "ret")
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: // output list (none)
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: "=a" (result) // output list
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: // any variables used on input (none)
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: "%eax" // clobber list
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// no clobber list
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// , "%ebx", "%ecx", "%edx" // GRR: we handle these manually
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// , "memory" // if write to a variable gcc thought was in a reg
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// , "cc" // "condition codes" (flag bits)
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);
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#else
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_mmx_supported = result;
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#else
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_mmx_supported = 0;
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#endif /* PNG_MMX_CODE_SUPPORTED */
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