Mercurial > sdl-ios-xcode
diff src/audio/SDL_mixer_MMX.c @ 887:b4b64bb88f2f
Date: Mon, 10 May 2004 10:17:46 -0400
From: Mike Frysinger
Subject: Re: [SDL] gcc-3.4.0 / PIC fix
here's a combined patch (yours and the one i mentioned earlier) that i tested
with gcc-3.4.0 and gcc-3.3.3
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Sun, 16 May 2004 17:19:48 +0000 |
parents | a9e38f3b8e4d |
children | e3b3130f3af8 |
line wrap: on
line diff
--- a/src/audio/SDL_mixer_MMX.c Thu May 06 15:55:06 2004 +0000 +++ b/src/audio/SDL_mixer_MMX.c Sun May 16 17:19:48 2004 +0000 @@ -15,13 +15,11 @@ { __asm__ __volatile__ ( -" movl %0,%%edi\n" // edi = dst -" movl %1,%%esi\n" // esi = src " movl %3,%%eax\n" // eax = volume -" movl %2,%%ebx\n" // ebx = size +" movl %2,%%edx\n" // edx = size -" shrl $4,%%ebx\n" // process 16 bytes per iteration = 8 samples +" shrl $4,%%edx\n" // process 16 bytes per iteration = 8 samples " jz .endS16\n" @@ -39,14 +37,14 @@ ".align 16\n" " .mixloopS16:\n" -" movq (%%esi),%%mm1\n" // mm1 = a|b|c|d +" movq (%1),%%mm1\n" // mm1 = a|b|c|d " movq %%mm1,%%mm2\n" // mm2 = a|b|c|d -" movq 8(%%esi),%%mm4\n" // mm4 = e|f|g|h +" movq 8(%1),%%mm4\n" // mm4 = e|f|g|h // pré charger le buffer dst dans mm7 -" movq (%%edi),%%mm7\n" // mm7 = dst[0]" +" movq (%0),%%mm7\n" // mm7 = dst[0]" // multiplier par le volume " pmullw %%mm0,%%mm1\n" // mm1 = l(a*v)|l(b*v)|l(c*v)|l(d*v) @@ -69,11 +67,11 @@ " punpcklwd %%mm5,%%mm6\n" // mm6 = g*v|h*v // pré charger le buffer dst dans mm5 -" movq 8(%%edi),%%mm5\n" // mm5 = dst[1] +" movq 8(%0),%%mm5\n" // mm5 = dst[1] // diviser par 128 " psrad $7,%%mm1\n" // mm1 = a*v/128|b*v/128 , 128 = SDL_MIX_MAXVOLUME -" addl $16,%%esi\n" +" add $16,%1\n" " psrad $7,%%mm3\n" // mm3 = c*v/128|d*v/128 @@ -87,15 +85,15 @@ // mm4 = le sample avec le volume modifié " packssdw %%mm4,%%mm6\n" // mm6 = s(e*v|f*v|g*v|h*v) -" movq %%mm3,(%%edi)\n" +" movq %%mm3,(%0)\n" " paddsw %%mm5,%%mm6\n" // mm6 = adjust_volume(src)+dst -" movq %%mm6,8(%%edi)\n" +" movq %%mm6,8(%0)\n" -" addl $16,%%edi\n" +" add $16,%0\n" -" dec %%ebx\n" +" dec %%edx\n" " jnz .mixloopS16\n" @@ -103,9 +101,9 @@ ".endS16:\n" : - : "m" (dst), "m"(src),"m"(size), + : "r" (dst), "r"(src),"m"(size), "m"(volume) - : "eax","ebx", "esi", "edi","memory" + : "eax","edx","memory" ); } @@ -119,11 +117,9 @@ { __asm__ __volatile__ ( -" movl %0,%%edi\n" // edi = dst -" movl %1,%%esi\n" // esi = src " movl %3,%%eax\n" // eax = volume -" movd %%ebx,%%mm0\n" +" movd %%edx,%%mm0\n" " movq %%mm0,%%mm1\n" " psllq $16,%%mm0\n" " por %%mm1,%%mm0\n" @@ -132,17 +128,17 @@ " psllq $16,%%mm0\n" " por %%mm1,%%mm0\n" -" movl %2,%%ebx\n" // ebx = size -" shr $3,%%ebx\n" // process 8 bytes per iteration = 8 samples +" movl %2,%%edx\n" // edx = size +" shr $3,%%edx\n" // process 8 bytes per iteration = 8 samples -" cmp $0,%%ebx\n" +" cmp $0,%%edx\n" " je .endS8\n" ".align 16\n" " .mixloopS8:\n" " pxor %%mm2,%%mm2\n" // mm2 = 0 -" movq (%%esi),%%mm1\n" // mm1 = a|b|c|d|e|f|g|h +" movq (%1),%%mm1\n" // mm1 = a|b|c|d|e|f|g|h " movq %%mm1,%%mm3\n" // mm3 = a|b|c|d|e|f|g|h @@ -152,10 +148,10 @@ " punpckhbw %%mm2,%%mm1\n" // mm1 = 0|a|0|b|0|c|0|d " punpcklbw %%mm2,%%mm3\n" // mm3 = 0|e|0|f|0|g|0|h -" movq (%%edi),%%mm2\n" // mm2 = destination +" movq (%0),%%mm2\n" // mm2 = destination " pmullw %%mm0,%%mm1\n" // mm1 = v*a|v*b|v*c|v*d -" addl $8,%%esi\n" +" add $8,%1\n" " pmullw %%mm0,%%mm3\n" // mm3 = v*e|v*f|v*g|v*h " psraw $7,%%mm1\n" // mm1 = v*a/128|v*b/128|v*c/128|v*d/128 @@ -166,19 +162,19 @@ " paddsb %%mm2,%%mm3\n" // add to destination buffer -" movq %%mm3,(%%edi)\n" // store back to ram -" addl $8,%%edi\n" +" movq %%mm3,(%0)\n" // store back to ram +" add $8,%0\n" -" dec %%ebx\n" +" dec %%edx\n" " jnz .mixloopS8\n" ".endS8:\n" " emms\n" : - : "m" (dst), "m"(src),"m"(size), + : "r" (dst), "r"(src),"m"(size), "m"(volume) - : "eax","ebx", "esi", "edi","memory" + : "eax","edx","memory" ); } #endif