--- libpng-1.2.8rel/pnggccrd.c 2004-12-03 01:14:25.000000000 +0100 +++ libpng-1.2.8rel.fixed/pnggccrd.c 2005-09-25 15:00:07.000000000 +0200 @@ -1737,6 +1737,7 @@ int dummy_value_c; // fix 'forbidden register spilled' int dummy_value_S; int dummy_value_D; + int dummy_value_a; __asm__ __volatile__ ( "subl $21, %%edi \n\t" @@ -1744,7 +1745,7 @@ ".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 + "pand (%3), %%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 @@ -1769,12 +1770,14 @@ : "=c" (dummy_value_c), // output regs (dummy) "=S" (dummy_value_S), - "=D" (dummy_value_D) + "=D" (dummy_value_D), + "=a" (dummy_value_a) + : "1" (sptr), // esi // input regs "2" (dp), // edi "0" (width), // ecx - "rim" (_const4) // %1(?) (0x0000000000FFFFFFLL) + "3" (&_const4) // %1(?) (0x0000000000FFFFFFLL) #if 0 /* %mm0, ..., %mm4 not supported by gcc 2.7.2.3 or egcs 1.1 */ : "%mm0", "%mm1", "%mm2" // clobber list @@ -1787,6 +1790,7 @@ int dummy_value_c; // fix 'forbidden register spilled' int dummy_value_S; int dummy_value_D; + int dummy_value_a; __asm__ __volatile__ ( "subl $9, %%edi \n\t" @@ -1794,7 +1798,7 @@ ".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 + "pand (%3), %%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 @@ -1813,12 +1817,13 @@ : "=c" (dummy_value_c), // output regs (dummy) "=S" (dummy_value_S), - "=D" (dummy_value_D) + "=D" (dummy_value_D), + "=a" (dummy_value_a) : "1" (sptr), // esi // input regs "2" (dp), // edi "0" (width), // ecx - "rim" (_const4) // (0x0000000000FFFFFFLL) + "3" (&_const4) // (0x0000000000FFFFFFLL) #if 0 /* %mm0, ..., %mm2 not supported by gcc 2.7.2.3 or egcs 1.1 */ : "%mm0", "%mm1", "%mm2" // clobber list @@ -1839,6 +1844,8 @@ int dummy_value_c; // fix 'forbidden register spilled' int dummy_value_S; int dummy_value_D; + int dummy_value_a; + int dummy_value_d; __asm__ __volatile__ ( "subl $3, %%esi \n\t" @@ -1850,14 +1857,14 @@ "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 + "pand (%3), %%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 + "pand (%4), %%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" @@ -1868,13 +1875,15 @@ : "=c" (dummy_value_c), // output regs (dummy) "=S" (dummy_value_S), - "=D" (dummy_value_D) + "=D" (dummy_value_D), + "=a" (dummy_value_a), + "=d" (dummy_value_d) : "1" (sptr), // esi // input regs "2" (dp), // edi "0" (width_mmx), // ecx - "rim" (_const4), // 0x0000000000FFFFFFLL - "rim" (_const6) // 0x00000000000000FFLL + "3" (&_const4), // 0x0000000000FFFFFFLL + "4" (&_const6) // 0x00000000000000FFLL #if 0 /* %mm0, ..., %mm3 not supported by gcc 2.7.2.3 or egcs 1.1 */ : "%mm0", "%mm1" // clobber list @@ -5339,6 +5348,7 @@ png_mmx_support(void) { #if defined(PNG_MMX_CODE_SUPPORTED) + int result; __asm__ __volatile__ ( "pushl %%ebx \n\t" // ebx gets clobbered by CPUID instruction "pushl %%ecx \n\t" // so does ecx... @@ -5380,7 +5390,6 @@ "0: \n\t" // .NOT_SUPPORTED: target label for jump instructions "movl $0, %%eax \n\t" // set return value to 0 "1: \n\t" // .RETURN: target label for jump instructions - "movl %%eax, _mmx_supported \n\t" // save in global static variable, too "popl %%edx \n\t" // restore edx "popl %%ecx \n\t" // restore ecx "popl %%ebx \n\t" // restore ebx @@ -5388,15 +5397,16 @@ // "ret \n\t" // DONE: no MMX support // (fall through to standard C "ret") - : // output list (none) + : "=a" (result) // output list : // any variables used on input (none) - : "%eax" // clobber list + // no 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) ); + _mmx_supported = result; #else _mmx_supported = 0; #endif /* PNG_MMX_CODE_SUPPORTED */