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Code Issues Releases Activity

Fix add_bytes_mmx and add_bytes_l2_mmx for w < 16

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Originally committed as revision 13877 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Reimar Döffinger 2008-06-22 07:05:40 +00:00
parent 3d9cc27df8
commit 00eebe3d6a
1 changed files with 6 additions and 2 deletions
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8
libavcodec/i386/dsputil_mmx.c
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@ -482,6 +482,7 @@ static void clear_blocks_mmx(DCTELEM *blocks)
static void add_bytes_mmx(uint8_t *dst, uint8_t *src, int w){
x86_reg i=0;
asm volatile(
"jmp 2f \n\t"
"1: \n\t"
"movq (%1, %0), %%mm0 \n\t"
"movq (%2, %0), %%mm1 \n\t"
@ -492,8 +493,9 @@ static void add_bytes_mmx(uint8_t *dst, uint8_t *src, int w){
"paddb %%mm0, %%mm1 \n\t"
"movq %%mm1, 8(%2, %0) \n\t"
"add $16, %0 \n\t"
"2: \n\t"
"cmp %3, %0 \n\t"
" jb 1b \n\t"
" js 1b \n\t"
: "+r" (i)
: "r"(src), "r"(dst), "r"((x86_reg)w-15)
);
@ -504,6 +506,7 @@ static void add_bytes_mmx(uint8_t *dst, uint8_t *src, int w){
static void add_bytes_l2_mmx(uint8_t *dst, uint8_t *src1, uint8_t *src2, int w){
x86_reg i=0;
asm volatile(
"jmp 2f \n\t"
"1: \n\t"
"movq (%2, %0), %%mm0 \n\t"
"movq 8(%2, %0), %%mm1 \n\t"
@ -512,8 +515,9 @@ static void add_bytes_l2_mmx(uint8_t *dst, uint8_t *src1, uint8_t *src2, int w){
"movq %%mm0, (%1, %0) \n\t"
"movq %%mm1, 8(%1, %0) \n\t"
"add $16, %0 \n\t"
"2: \n\t"
"cmp %4, %0 \n\t"
" jb 1b \n\t"
" js 1b \n\t"
: "+r" (i)
: "r"(dst), "r"(src1), "r"(src2), "r"((x86_reg)w-15)
);