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Code Issues Releases Activity

merge asm fragments in H264_CHROMA_MC2_TMPL()

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10% faster avg_h264_chroma_mc2_mmx2()
5% faster put_h264_chroma_mc2_mmx2()

Originally committed as revision 7897 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2007-02-09 12:24:22 +00:00
parent 7bb5c2a6ea
commit 9301a0b4a9
1 changed files with 29 additions and 40 deletions
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69
libavcodec/i386/dsputil_h264_template_mmx.c
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@ -267,8 +267,6 @@ static void H264_CHROMA_MC2_TMPL(uint8_t *dst/*align 2*/, uint8_t *src/*align 1*
{
int CD=((1<<16)-1)*x*y + 8*y;
int AB=((8<<16)-8)*x + 64 - CD;
int i;
asm volatile(
/* mm5 = {A,B,A,B} */
/* mm6 = {C,D,C,D} */
@ -277,50 +275,41 @@ static void H264_CHROMA_MC2_TMPL(uint8_t *dst/*align 2*/, uint8_t *src/*align 1*
"punpckldq %%mm5, %%mm5\n\t"
"punpckldq %%mm6, %%mm6\n\t"
"pxor %%mm7, %%mm7\n\t"
:: "r"(AB), "r"(CD));
asm volatile(
/* mm0 = src[0,1,1,2] */
"movd %0, %%mm0\n\t"
"movd %2, %%mm0\n\t"
"punpcklbw %%mm7, %%mm0\n\t"
"pshufw $0x94, %%mm0, %%mm0\n\t"
:: "m"(src[0]));
:: "r"(AB), "r"(CD), "m"(src[0]));
for(i=0; i<h; i++) {
asm volatile(
/* mm1 = A * src[0,1] + B * src[1,2] */
"movq %%mm0, %%mm1\n\t"
"pmaddwd %%mm5, %%mm1\n\t"
::);
src += stride;
asm volatile(
/* mm0 = src[0,1,1,2] */
"movd %0, %%mm0\n\t"
"punpcklbw %%mm7, %%mm0\n\t"
"pshufw $0x94, %%mm0, %%mm0\n\t"
:: "m"(src[0]));
asm volatile(
"1:\n\t"
"addl %4, %1\n\t"
/* mm1 = A * src[0,1] + B * src[1,2] */
"movq %%mm0, %%mm1\n\t"
"pmaddwd %%mm5, %%mm1\n\t"
/* mm0 = src[0,1,1,2] */
"movd (%1), %%mm0\n\t"
"punpcklbw %%mm7, %%mm0\n\t"
"pshufw $0x94, %%mm0, %%mm0\n\t"
/* mm1 += C * src[0,1] + D * src[1,2] */
"movq %%mm0, %%mm2\n\t"
"pmaddwd %%mm6, %%mm2\n\t"
"paddw %%mm2, %%mm1\n\t"
/* dst[0,1] = pack((mm1 + 32) >> 6) */
"paddw %3, %%mm1\n\t"
"psrlw $6, %%mm1\n\t"
"packssdw %%mm7, %%mm1\n\t"
"packuswb %%mm7, %%mm1\n\t"
/* writes garbage to the right of dst.
* ok because partitions are processed from left to right. */
H264_CHROMA_OP4((%0), %%mm1, %%mm3)
"movd %%mm1, (%0)\n\t"
"addl %4, %0\n\t"
"subl $1, %2\n\t"
"jnz 1b\n\t"
: "+r" (dst), "+r"(src), "+r"(h) : "m" (ff_pw_32), "r"(stride));
asm volatile(
/* mm1 += C * src[0,1] + D * src[1,2] */
"movq %%mm0, %%mm2\n\t"
"pmaddwd %%mm6, %%mm2\n\t"
"paddw %%mm2, %%mm1\n\t"
::);
asm volatile(
/* dst[0,1] = pack((mm1 + 32) >> 6) */
"paddw %1, %%mm1\n\t"
"psrlw $6, %%mm1\n\t"
"packssdw %%mm7, %%mm1\n\t"
"packuswb %%mm7, %%mm1\n\t"
/* writes garbage to the right of dst.
* ok because partitions are processed from left to right. */
H264_CHROMA_OP4(%0, %%mm1, %%mm3)
"movd %%mm1, %0\n\t"
: "=m" (dst[0]) : "m" (ff_pw_32));
dst += stride;
}
}
#endif