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Merge b_idx and edge variables, and optimize the ASM to directly load variables
from memory locations/offsets depending on b_idx plus constants, rather than having gcc do this. This saves several lea calls and together saves about 10 cycles in h264_loop_filter_strength_mmx2(). Originally committed as revision 25256 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Ronald S. Bultje
parent
0cc8a5d088
commit
cd17285e6c
@ -69,33 +69,34 @@ static av_always_inline void h264_loop_filter_strength_iteration_mmx2(int16_t bS
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int mask_mv, int dir, const int d_idx,
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const uint64_t mask_dir)
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{
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int b_idx, edge;
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for( b_idx=12, edge=0; edge<edges; edge+=step, b_idx+=8*step ) {
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x86_reg b_idx;
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mask_mv <<= 3;
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for( b_idx=0; b_idx<edges; b_idx+=step ) {
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if (!mask_dir)
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__asm__ volatile(
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"pxor %%mm0, %%mm0 \n\t"
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::
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);
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if(!(mask_mv & edge)) {
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if(!(mask_mv & b_idx)) {
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if(bidir) {
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__asm__ volatile(
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"movd %a2(%0), %%mm2 \n"
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"punpckldq %a3(%0), %%mm2 \n" // { ref0[bn], ref1[bn] }
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"pshufw $0x44, (%0), %%mm0 \n" // { ref0[b], ref0[b] }
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"pshufw $0x44, 40(%0), %%mm1 \n" // { ref1[b], ref1[b] }
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"movd %a3(%0,%2), %%mm2 \n"
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"punpckldq %a4(%0,%2), %%mm2 \n" // { ref0[bn], ref1[bn] }
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"pshufw $0x44, 12(%0,%2), %%mm0 \n" // { ref0[b], ref0[b] }
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"pshufw $0x44, 52(%0,%2), %%mm1 \n" // { ref1[b], ref1[b] }
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"pshufw $0x4E, %%mm2, %%mm3 \n"
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"psubb %%mm2, %%mm0 \n" // { ref0[b]!=ref0[bn], ref0[b]!=ref1[bn] }
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"psubb %%mm3, %%mm1 \n" // { ref1[b]!=ref1[bn], ref1[b]!=ref0[bn] }
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"por %%mm1, %%mm0 \n"
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"movq %a4(%1), %%mm1 \n"
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"movq %a5(%1), %%mm2 \n"
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"movq %a5(%1,%2,4), %%mm1 \n"
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"movq %a6(%1,%2,4), %%mm2 \n"
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"movq %%mm1, %%mm3 \n"
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"movq %%mm2, %%mm4 \n"
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"psubw (%1), %%mm1 \n"
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"psubw 8(%1), %%mm2 \n"
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"psubw 160(%1), %%mm3 \n"
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"psubw 168(%1), %%mm4 \n"
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"psubw 48(%1,%2,4), %%mm1 \n"
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"psubw 56(%1,%2,4), %%mm2 \n"
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"psubw 208(%1,%2,4), %%mm3 \n"
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"psubw 216(%1,%2,4), %%mm4 \n"
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"packsswb %%mm2, %%mm1 \n"
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"packsswb %%mm4, %%mm3 \n"
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"paddb %%mm6, %%mm1 \n"
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@ -105,14 +106,14 @@ static av_always_inline void h264_loop_filter_strength_iteration_mmx2(int16_t bS
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"packsswb %%mm3, %%mm1 \n"
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"por %%mm1, %%mm0 \n"
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"movq %a6(%1), %%mm1 \n"
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"movq %a7(%1), %%mm2 \n"
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"movq %a7(%1,%2,4), %%mm1 \n"
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"movq %a8(%1,%2,4), %%mm2 \n"
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"movq %%mm1, %%mm3 \n"
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"movq %%mm2, %%mm4 \n"
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"psubw (%1), %%mm1 \n"
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"psubw 8(%1), %%mm2 \n"
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"psubw 160(%1), %%mm3 \n"
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"psubw 168(%1), %%mm4 \n"
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"psubw 48(%1,%2,4), %%mm1 \n"
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"psubw 56(%1,%2,4), %%mm2 \n"
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"psubw 208(%1,%2,4), %%mm3 \n"
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"psubw 216(%1,%2,4), %%mm4 \n"
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"packsswb %%mm2, %%mm1 \n"
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"packsswb %%mm4, %%mm3 \n"
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"paddb %%mm6, %%mm1 \n"
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@ -125,41 +126,44 @@ static av_always_inline void h264_loop_filter_strength_iteration_mmx2(int16_t bS
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"por %%mm1, %%mm0 \n"
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"pshufw $0x4E, %%mm0, %%mm1 \n"
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"pminub %%mm1, %%mm0 \n"
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::"r"(ref[0]+b_idx),
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"r"(mv[0]+b_idx),
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"i"(d_idx),
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"i"(d_idx+40),
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"i"(d_idx*4),
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"i"(d_idx*4+8),
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"i"(d_idx*4+160),
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"i"(d_idx*4+168)
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::"r"(ref),
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"r"(mv),
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"r"(b_idx),
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"i"(d_idx+12),
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"i"(d_idx+52),
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"i"(d_idx*4+48),
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"i"(d_idx*4+56),
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"i"(d_idx*4+208),
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"i"(d_idx*4+216)
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);
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} else {
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__asm__ volatile(
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"movd (%1), %%mm0 \n"
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"psubb %a0(%1), %%mm0 \n" // ref[b] != ref[bn]
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"movq (%2), %%mm1 \n"
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"movq 8(%2), %%mm2 \n"
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"psubw %a3(%2), %%mm1 \n"
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"psubw %a4(%2), %%mm2 \n"
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"movd 12(%0,%2), %%mm0 \n"
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"psubb %a3(%0,%2), %%mm0 \n" // ref[b] != ref[bn]
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"movq 48(%1,%2,4), %%mm1 \n"
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"movq 56(%1,%2,4), %%mm2 \n"
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"psubw %a4(%1,%2,4), %%mm1 \n"
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"psubw %a5(%1,%2,4), %%mm2 \n"
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"packsswb %%mm2, %%mm1 \n"
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"paddb %%mm6, %%mm1 \n"
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"psubusb %%mm5, %%mm1 \n" // abs(mv[b] - mv[bn]) >= limit
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"packsswb %%mm1, %%mm1 \n"
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"por %%mm1, %%mm0 \n"
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::"i"(d_idx),
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"r"(ref[0]+b_idx),
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"r"(mv[0]+b_idx),
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"i"(d_idx*4),
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"i"(d_idx*4+8)
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::"r"(ref),
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"r"(mv),
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"r"(b_idx),
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"i"(d_idx+12),
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"i"(d_idx*4+48),
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"i"(d_idx*4+56)
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);
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}
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}
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__asm__ volatile(
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"movd (%0), %%mm1 \n"
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"por %a1(%0), %%mm1 \n" // nnz[b] || nnz[bn]
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::"r"(nnz+b_idx),
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"i"(d_idx)
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"movd 12(%0,%1), %%mm1 \n"
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"por %a2(%0,%1), %%mm1 \n" // nnz[b] || nnz[bn]
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::"r"(nnz),
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"r"(b_idx),
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"i"(d_idx+12)
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);
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__asm__ volatile(
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"pminub %%mm7, %%mm1 \n"
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@ -168,9 +172,11 @@ static av_always_inline void h264_loop_filter_strength_iteration_mmx2(int16_t bS
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"pxor %%mm2, %%mm2 \n"
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"pmaxub %%mm0, %%mm1 \n"
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"punpcklbw %%mm2, %%mm1 \n"
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"movq %%mm1, %0 \n"
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:"=m"(*bS[dir][edge])
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::"memory"
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"movq %%mm1, %a1(%0,%2) \n"
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::"r"(bS),
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"i"(32*dir),
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"r"(b_idx)
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:"memory"
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);
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}
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}
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@ -194,8 +200,10 @@ static void h264_loop_filter_strength_mmx2( int16_t bS[2][4][4], uint8_t nnz[40]
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// could do a special case for dir==0 && edges==1, but it only reduces the
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// average filter time by 1.2%
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step <<= 3;
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edges <<= 3;
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h264_loop_filter_strength_iteration_mmx2(bS, nnz, ref, mv, bidir, edges, step, mask_mv1, 1, -8, 0);
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h264_loop_filter_strength_iteration_mmx2(bS, nnz, ref, mv, bidir, 4, 1, mask_mv0, 0, -1, -1);
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h264_loop_filter_strength_iteration_mmx2(bS, nnz, ref, mv, bidir, 32, 8, mask_mv0, 0, -1, -1);
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__asm__ volatile(
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"movq (%0), %%mm0 \n\t"
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