Mercurial > sdl-ios-xcode
diff src/audio/SDL_mixer_MMX_VC.c @ 1720:a1ebb17f9c52 SDL-1.3
Cleaned up a bunch of warnings, started adding Win32 event support
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Fri, 30 Jun 2006 05:42:49 +0000 |
| parents | 4da1ee79c9af |
| children | 1cc762cafff8 |
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--- a/src/audio/SDL_mixer_MMX_VC.c Wed Jun 28 08:12:07 2006 +0000 +++ b/src/audio/SDL_mixer_MMX_VC.c Fri Jun 30 05:42:49 2006 +0000 @@ -40,14 +40,19 @@ void SDL_MixAudio_MMX_S16_VC(char *dst, char *src, unsigned int nSize, int volume) { + /* *INDENT-OFF* */ __asm { - - push edi push esi push ebx mov edi, dst // edi = dst + push edi + push esi + push ebx + mov edi, dst // edi = dst mov esi, src // esi = src mov eax, volume // eax = volume mov ebx, nSize // ebx = size shr ebx, 4 // process 16 bytes per iteration = 8 samples - jz endS16 pxor mm0, mm0 movd mm0, eax //%%eax,%%mm0 + jz endS16 + pxor mm0, mm0 + movd mm0, eax //%%eax,%%mm0 movq mm1, mm0 //%%mm0,%%mm1 psllq mm0, 16 //$16,%%mm0 por mm0, mm1 //%%mm1,%%mm0 @@ -58,13 +63,14 @@ #ifndef __WATCOMC__ align 16 #endif - mixloopS16:movq mm1,[esi] //(%%esi),%%mm1\n" // mm1 = a|b|c|d - movq mm2, mm1 //%%mm1,%%mm2\n" // mm2 = a|b|c|d + mixloopS16: + movq mm1,[esi] //(%%esi),%%mm1\n" // mm1 = a|b|c|d + movq mm2, mm1 //%%mm1,%%mm2\n" // mm2 = a|b|c|d movq mm4,[esi + 8] //8(%%esi),%%mm4\n" // mm4 = e|f|g|h // pre charger le buffer dst dans mm7 - movq mm7,[edi] //(%%edi),%%mm7\n" // mm7 = dst[0]" + movq mm7,[edi] //(%%edi),%%mm7\n" // mm7 = dst[0]" // multiplier par le volume - pmullw mm1, mm0 //%%mm0,%%mm1\n" // mm1 = l(a*v)|l(b*v)|l(c*v)|l(d*v) + pmullw mm1, mm0 //%%mm0,%%mm1\n" // mm1 = l(a*v)|l(b*v)|l(c*v)|l(d*v) pmulhw mm2, mm0 //%%mm0,%%mm2\n" // mm2 = h(a*v)|h(b*v)|h(c*v)|h(d*v) movq mm5, mm4 //%%mm4,%%mm5\n" // mm5 = e|f|g|h pmullw mm4, mm0 //%%mm0,%%mm4\n" // mm4 = l(e*v)|l(f*v)|l(g*v)|l(h*v) @@ -78,7 +84,7 @@ // pre charger le buffer dst dans mm5 movq mm5,[edi + 8] //8(%%edi),%%mm5\n" // mm5 = dst[1] // diviser par 128 - psrad mm1, 7 //$7,%%mm1\n" // mm1 = a*v/128|b*v/128 , 128 = SDL_MIX_MAXVOLUME + psrad mm1, 7 //$7,%%mm1\n" // mm1 = a*v/128|b*v/128 , 128 = SDL_MIX_MAXVOLUME add esi, 16 //$16,%%esi\n" psrad mm3, 7 //$7,%%mm3\n" // mm3 = c*v/128|d*v/128 psrad mm4, 7 //$7,%%mm4\n" // mm4 = e*v/128|f*v/128 @@ -93,8 +99,14 @@ movq[edi + 8], mm6 //%%mm6,8(%%edi)\n" add edi, 16 //$16,%%edi\n" dec ebx //%%ebx\n" - jnz mixloopS16 ends16:emms pop ebx pop esi pop edi} - + jnz mixloopS16 + ends16: + emms + pop ebx + pop esi + pop edi + } + /* *INDENT-ON* */ } //////////////////////////////////////////////// @@ -104,9 +116,13 @@ void SDL_MixAudio_MMX_S8_VC(char *dst, char *src, unsigned int nSize, int volume) { + /* *INDENT-OFF* */ _asm { - push edi push esi push ebx mov edi, dst //movl %0,%%edi // edi = dst + push edi + push esi + push ebx + mov edi, dst //%0,%%edi // edi = dst mov esi, src //%1,%%esi // esi = src mov eax, volume //%3,%%eax // eax = volume movd mm0, eax //%%eax,%%mm0 @@ -124,15 +140,16 @@ #ifndef __WATCOMC__ align 16 #endif - mixloopS8:pxor mm2, mm2 //%%mm2,%%mm2 // mm2 = 0 + mixloopS8: + pxor mm2, mm2 //%%mm2,%%mm2 // mm2 = 0 movq mm1,[esi] //(%%esi),%%mm1 // mm1 = a|b|c|d|e|f|g|h - movq mm3, mm1 //%%mm1,%%mm3 // mm3 = a|b|c|d|e|f|g|h + movq mm3, mm1 //%%mm1,%%mm3 // mm3 = a|b|c|d|e|f|g|h // on va faire le "sign extension" en faisant un cmp avec 0 qui retourne 1 si <0, 0 si >0 pcmpgtb mm2, mm1 //%%mm1,%%mm2 // mm2 = 11111111|00000000|00000000.... punpckhbw mm1, mm2 //%%mm2,%%mm1 // mm1 = 0|a|0|b|0|c|0|d punpcklbw mm3, mm2 //%%mm2,%%mm3 // mm3 = 0|e|0|f|0|g|0|h movq mm2,[edi] //(%%edi),%%mm2 // mm2 = destination - pmullw mm1, mm0 //%%mm0,%%mm1 // mm1 = v*a|v*b|v*c|v*d + pmullw mm1, mm0 //%%mm0,%%mm1 // mm1 = v*a|v*b|v*c|v*d add esi, 8 //$8,%%esi pmullw mm3, mm0 //%%mm0,%%mm3 // mm3 = v*e|v*f|v*g|v*h psraw mm1, 7 //$7,%%mm1 // mm1 = v*a/128|v*b/128|v*c/128|v*d/128 @@ -142,8 +159,16 @@ movq[edi], mm3 //%%mm3,(%%edi) // store back to ram add edi, 8 //$8,%%edi dec ebx //%%ebx - jnz mixloopS8 endS8:emms pop ebx pop esi pop edi} + jnz mixloopS8 + endS8: + emms + pop ebx + pop esi + pop edi + } + /* *INDENT-ON* */ } #endif /* SDL_ASSEMBLY_ROUTINES */ + /* vi: set ts=4 sw=4 expandtab: */