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optimize H264_DEBLOCK_P0_Q0 

2.5% faster filter_mb_fast() on P3

Originally committed as revision 6877 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2006-11-03 02:03:56 +00:00
parent dd7e46e7c3
commit e9f1885c21
2 changed files with 23 additions and 40 deletions
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2
libavcodec/i386/dsputil_mmx.c
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@ -58,6 +58,8 @@ static const uint64_t ff_pb_1 attribute_used __attribute__ ((aligned(8))) = 0x0
static const uint64_t ff_pb_3 attribute_used __attribute__ ((aligned(8))) = 0x0303030303030303ULL;
static const uint64_t ff_pb_7 attribute_used __attribute__ ((aligned(8))) = 0x0707070707070707ULL;
static const uint64_t ff_pb_3F attribute_used __attribute__ ((aligned(8))) = 0x3F3F3F3F3F3F3F3FULL;
static const uint64_t ff_pb_A1 attribute_used __attribute__ ((aligned(8))) = 0xA1A1A1A1A1A1A1A1ULL;
static const uint64_t ff_pb_5F attribute_used __attribute__ ((aligned(8))) = 0x5F5F5F5F5F5F5F5FULL;
static const uint64_t ff_pb_FC attribute_used __attribute__ ((aligned(8))) = 0xFCFCFCFCFCFCFCFCULL;
#define JUMPALIGN() __asm __volatile (ASMALIGN(3)::)

61
libavcodec/i386/h264dsp_mmx.c
View File

@ -337,46 +337,27 @@ static void ff_h264_idct8_dc_add_mmx2(uint8_t *dst, int16_t *block, int stride)
// out: mm1=p0' mm2=q0'
// clobbers: mm0,3-6
#define H264_DEBLOCK_P0_Q0(pb_01, pb_3f)\
/* a = q0^p0^((p1-q1)>>2) */\
"movq %%mm0, %%mm4 \n\t"\
"psubb %%mm3, %%mm4 \n\t"\
"psrlw $2, %%mm4 \n\t"\
"pxor %%mm1, %%mm4 \n\t"\
"pxor %%mm2, %%mm4 \n\t"\
/* b = p0^(q1>>2) */\
"psrlw $2, %%mm3 \n\t"\
"pand "#pb_3f", %%mm3 \n\t"\
"movq %%mm1, %%mm5 \n\t"\
"pxor %%mm3, %%mm5 \n\t"\
/* c = q0^(p1>>2) */\
"psrlw $2, %%mm0 \n\t"\
"pand "#pb_3f", %%mm0 \n\t"\
"movq %%mm2, %%mm6 \n\t"\
"pxor %%mm0, %%mm6 \n\t"\
/* d = (c^b) & ~(b^a) & 1 */\
"pxor %%mm5, %%mm6 \n\t"\
"pxor %%mm4, %%mm5 \n\t"\
"pandn %%mm6, %%mm5 \n\t"\
"pand "#pb_01", %%mm5 \n\t"\
/* delta = (avg(q0, p1>>2) + (d&a))
* - (avg(p0, q1>>2) + (d&~a)) */\
"pavgb %%mm2, %%mm0 \n\t"\
"pand %%mm5, %%mm4 \n\t"\
"paddusb %%mm4, %%mm0 \n\t"\
"pavgb %%mm1, %%mm3 \n\t"\
"pxor %%mm5, %%mm4 \n\t"\
"paddusb %%mm4, %%mm3 \n\t"\
/* p0 += clip(delta, -tc0, tc0)
* q0 -= clip(delta, -tc0, tc0) */\
"movq %%mm0, %%mm4 \n\t"\
"psubusb %%mm3, %%mm0 \n\t"\
"psubusb %%mm4, %%mm3 \n\t"\
"pminub %%mm7, %%mm0 \n\t"\
"pminub %%mm7, %%mm3 \n\t"\
"paddusb %%mm0, %%mm1 \n\t"\
"paddusb %%mm3, %%mm2 \n\t"\
"psubusb %%mm3, %%mm1 \n\t"\
"psubusb %%mm0, %%mm2 \n\t"
"movq %%mm1 , %%mm5 \n\t"\
"pxor %%mm2 , %%mm5 \n\t" /* p0^q0*/\
"pand "#pb_01" , %%mm5 \n\t" /* (p0^q0)&1*/\
"pcmpeqb %%mm4 , %%mm4 \n\t"\
"pxor %%mm4 , %%mm3 \n\t"\
"pavgb %%mm0 , %%mm3 \n\t" /* (p1 - q1 + 256)>>1*/\
"pavgb "MANGLE(ff_pb_3)" , %%mm3 \n\t" /*(((p1 - q1 + 256)>>1)+4)>>1 = 64+2+(p1-q1)>>2*/\
"pxor %%mm1 , %%mm4 \n\t"\
"pavgb %%mm2 , %%mm4 \n\t" /* (q0 - p0 + 256)>>1*/\
"pavgb %%mm5 , %%mm3 \n\t"\
"paddb %%mm4 , %%mm3 \n\t" /* d+128+33*/\
"pxor %%mm6 , %%mm6 \n\t" /* 0*/\
"psubb %%mm3 , %%mm6 \n\t" /* 128-33-d*/\
"psubusb "MANGLE(ff_pb_A1)" , %%mm3 \n\t"\
"psubusb "MANGLE(ff_pb_5F)" , %%mm6 \n\t"\
"pminub %%mm7 , %%mm3 \n\t"\
"pminub %%mm7 , %%mm6 \n\t"\
"paddusb %%mm3 , %%mm1 \n\t"\
"paddusb %%mm6 , %%mm2 \n\t"\
"psubusb %%mm6 , %%mm1 \n\t"\
"psubusb %%mm3 , %%mm2 \n\t"
// in: mm0=p1 mm1=p0 mm2=q0 mm3=q1 mm7=(tc&mask) %8=mm_bone
// out: (q1addr) = clip( (q2+((p0+q0+1)>>1))>>1, q1-tc0, q1+tc0 )