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Mixer: Visual C MMX asm code now aligns loops to 16 bytes.

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This patch came from Stephane Marchesin's codefork, but I don't know who
 wrote it originally.
This commit is contained in:
Ryan C. Gordon 2005-04-17 10:27:00 +00:00
parent 944dc01b12
commit 64e340141a
1 changed files with 2 additions and 2 deletions
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4
src/audio/SDL_mixer_MMX_VC.c
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@ -19,7 +19,6 @@ void SDL_MixAudio_MMX_S16_VC(char* dst,char* src,unsigned int nSize,int volume)
{
__asm
{
align 16
push edi
push esi
@ -42,6 +41,7 @@ void SDL_MixAudio_MMX_S16_VC(char* dst,char* src,unsigned int nSize,int volume)
psllq mm0, 16 //$16,%%mm0
por mm0, mm1 //%%mm1,%%mm0 // mm0 = vol|vol|vol|vol
align 16
mixloopS16:
movq mm1, [esi] //(%%esi),%%mm1\n" // mm1 = a|b|c|d
movq mm2, mm1 //%%mm1,%%mm2\n" // mm2 = a|b|c|d
@ -98,7 +98,6 @@ void SDL_MixAudio_MMX_S8_VC(char* dst,char* src,unsigned int nSize,int volume)
{
_asm
{
align 16
push edi
push esi
@ -122,6 +121,7 @@ void SDL_MixAudio_MMX_S8_VC(char* dst,char* src,unsigned int nSize,int volume)
cmp ebx, 0 //$0,%%ebx
je endS8
align 16
mixloopS8:
pxor mm2, mm2 //%%mm2,%%mm2 // mm2 = 0
movq mm1, [esi] //(%%esi),%%mm1 // mm1 = a|b|c|d|e|f|g|h