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sse2 16x16 sum squared diff (306=>268 cycles on a K8) 

faster 8x8 mmx ssd (77=>70 cycles)

Originally committed as revision 4623 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Loren Merritt 2005-09-30 02:31:47 +00:00
parent 7dd611c900
commit 5693c08356
1 changed files with 85 additions and 5 deletions
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90
libavcodec/i386/dsputil_mmx.c
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@ -744,31 +744,49 @@ static int sse8_mmx(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int
int tmp;
asm volatile (
"movl %4,%%ecx\n"
"shr $1,%%ecx\n"
"pxor %%mm0,%%mm0\n" /* mm0 = 0 */
"pxor %%mm7,%%mm7\n" /* mm7 holds the sum */
"1:\n"
"movq (%0),%%mm1\n" /* mm1 = pix1[0-7] */
"movq (%1),%%mm2\n" /* mm2 = pix2[0-7] */
"movq (%0),%%mm1\n" /* mm1 = pix1[0][0-7] */
"movq (%1),%%mm2\n" /* mm2 = pix2[0][0-7] */
"movq (%0,%3),%%mm3\n" /* mm3 = pix1[1][0-7] */
"movq (%1,%3),%%mm4\n" /* mm4 = pix2[1][0-7] */
/* todo: mm1-mm2, mm3-mm4 */
/* algo: substract mm1 from mm2 with saturation and vice versa */
/* OR the results to get absolute difference */
"movq %%mm1,%%mm5\n"
"movq %%mm3,%%mm6\n"
"psubusb %%mm2,%%mm1\n"
"psubusb %%mm4,%%mm3\n"
"psubusb %%mm5,%%mm2\n"
"psubusb %%mm6,%%mm4\n"
"por %%mm1,%%mm2\n"
"por %%mm3,%%mm4\n"
/* now convert to 16-bit vectors so we can square them */
"movq %%mm2,%%mm1\n"
"movq %%mm4,%%mm3\n"
"punpckhbw %%mm0,%%mm2\n"
"punpckhbw %%mm0,%%mm4\n"
"punpcklbw %%mm0,%%mm1\n" /* mm1 now spread over (mm1,mm2) */
"punpcklbw %%mm0,%%mm3\n" /* mm4 now spread over (mm3,mm4) */
"pmaddwd %%mm2,%%mm2\n"
"pmaddwd %%mm4,%%mm4\n"
"pmaddwd %%mm1,%%mm1\n"
"pmaddwd %%mm3,%%mm3\n"
"add %3,%0\n"
"add %3,%1\n"
"lea (%0,%3,2), %0\n" /* pix1 += 2*line_size */
"lea (%1,%3,2), %1\n" /* pix2 += 2*line_size */
"paddd %%mm2,%%mm1\n"
"paddd %%mm4,%%mm3\n"
"paddd %%mm1,%%mm7\n"
"paddd %%mm3,%%mm7\n"
"decl %%ecx\n"
"jnz 1b\n"
@ -843,6 +861,68 @@ static int sse16_mmx(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int
return tmp;
}
static int sse16_sse2(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h) {
int tmp;
asm volatile (
"shr $1,%2\n"
"pxor %%xmm0,%%xmm0\n" /* mm0 = 0 */
"pxor %%xmm7,%%xmm7\n" /* mm7 holds the sum */
"1:\n"
"movdqu (%0),%%xmm1\n" /* mm1 = pix1[0][0-15] */
"movdqu (%1),%%xmm2\n" /* mm2 = pix2[0][0-15] */
"movdqu (%0,%4),%%xmm3\n" /* mm3 = pix1[1][0-15] */
"movdqu (%1,%4),%%xmm4\n" /* mm4 = pix2[1][0-15] */
/* todo: mm1-mm2, mm3-mm4 */
/* algo: substract mm1 from mm2 with saturation and vice versa */
/* OR the results to get absolute difference */
"movdqa %%xmm1,%%xmm5\n"
"movdqa %%xmm3,%%xmm6\n"
"psubusb %%xmm2,%%xmm1\n"
"psubusb %%xmm4,%%xmm3\n"
"psubusb %%xmm5,%%xmm2\n"
"psubusb %%xmm6,%%xmm4\n"
"por %%xmm1,%%xmm2\n"
"por %%xmm3,%%xmm4\n"
/* now convert to 16-bit vectors so we can square them */
"movdqa %%xmm2,%%xmm1\n"
"movdqa %%xmm4,%%xmm3\n"
"punpckhbw %%xmm0,%%xmm2\n"
"punpckhbw %%xmm0,%%xmm4\n"
"punpcklbw %%xmm0,%%xmm1\n" /* mm1 now spread over (mm1,mm2) */
"punpcklbw %%xmm0,%%xmm3\n" /* mm4 now spread over (mm3,mm4) */
"pmaddwd %%xmm2,%%xmm2\n"
"pmaddwd %%xmm4,%%xmm4\n"
"pmaddwd %%xmm1,%%xmm1\n"
"pmaddwd %%xmm3,%%xmm3\n"
"lea (%0,%4,2), %0\n" /* pix1 += 2*line_size */
"lea (%1,%4,2), %1\n" /* pix2 += 2*line_size */
"paddd %%xmm2,%%xmm1\n"
"paddd %%xmm4,%%xmm3\n"
"paddd %%xmm1,%%xmm7\n"
"paddd %%xmm3,%%xmm7\n"
"decl %2\n"
"jnz 1b\n"
"movdqa %%xmm7,%%xmm1\n"
"psrldq $8, %%xmm7\n" /* shift hi qword to lo */
"paddd %%xmm1,%%xmm7\n"
"movdqa %%xmm7,%%xmm1\n"
"psrldq $4, %%xmm7\n" /* shift hi dword to lo */
"paddd %%xmm1,%%xmm7\n"
"movd %%xmm7,%3\n"
: "+r" (pix1), "+r" (pix2), "+r"(h), "=r"(tmp)
: "r" ((long)line_size));
return tmp;
}
static int hf_noise8_mmx(uint8_t * pix1, int line_size, int h) {
int tmp;
asm volatile (
@ -2626,7 +2706,7 @@ void dsputil_init_mmx(DSPContext* c, AVCodecContext *avctx)
c->hadamard8_diff[1]= hadamard8_diff_mmx;
c->pix_norm1 = pix_norm1_mmx;
c->sse[0] = sse16_mmx;
c->sse[0] = (mm_flags & MM_SSE2) ? sse16_sse2 : sse16_mmx;
c->sse[1] = sse8_mmx;
c->vsad[4]= vsad_intra16_mmx;