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Code Issues Releases Activity

x86/dsputil_mmx: support 4 sample edges

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-06-22 16:12:54 +02:00
parent 15bde06084
commit fba18ef8cc
1 changed files with 20 additions and 1 deletions
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21
libavcodec/x86/dsputil_mmx.c
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@ -807,7 +807,7 @@ static void draw_edges_mmx(uint8_t *buf, int wrap, int width, int height,
: "+r"(ptr)
: "r"((x86_reg)wrap), "r"((x86_reg)width), "r"(ptr + wrap * height)
);
} else {
} else if(w==16){
__asm__ volatile (
"1: \n\t"
"movd (%0), %%mm0 \n\t"
@ -828,6 +828,25 @@ static void draw_edges_mmx(uint8_t *buf, int wrap, int width, int height,
: "+r"(ptr)
: "r"((x86_reg)wrap), "r"((x86_reg)width), "r"(ptr + wrap * height)
);
} else {
av_assert1(w == 4);
__asm__ volatile (
"1: \n\t"
"movd (%0), %%mm0 \n\t"
"punpcklbw %%mm0, %%mm0 \n\t"
"punpcklwd %%mm0, %%mm0 \n\t"
"movd %%mm0, -4(%0) \n\t"
"movd -4(%0, %2), %%mm1 \n\t"
"punpcklbw %%mm1, %%mm1 \n\t"
"punpckhwd %%mm1, %%mm1 \n\t"
"punpckhdq %%mm1, %%mm1 \n\t"
"movd %%mm1, (%0, %2) \n\t"
"add %1, %0 \n\t"
"cmp %3, %0 \n\t"
"jb 1b \n\t"
: "+r"(ptr)
: "r"((x86_reg)wrap), "r"((x86_reg)width), "r"(ptr + wrap * height)
);
}
/* top and bottom (and hopefully also the corners) */