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Remove mv_mask variable. Replace the related pand -1/0 instructions by either 

a pxor, or remove the instruction alltogether. Altogether, this saves 1
instruction.

Originally committed as revision 25255 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Ronald S. Bultje 2010-09-29 14:03:30 +00:00
parent c0673f2cf4
commit 0cc8a5d088
1 changed files with 7 additions and 6 deletions
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13
libavcodec/x86/h264dsp_mmx.c
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@ -66,14 +66,15 @@ void ff_h264_idct_add8_sse2 (uint8_t **dest, const int *block_offset, DCTEL
static av_always_inline void h264_loop_filter_strength_iteration_mmx2(int16_t bS[2][4][4], uint8_t nnz[40],
int8_t ref[2][40], int16_t mv[2][40][2],
int bidir, int edges, int step,
int mask_mv, int dir, const int d_idx)
int mask_mv, int dir, const int d_idx,
const uint64_t mask_dir)
{
DECLARE_ALIGNED(8, const uint64_t, mask_dir) = dir ? 0 : 0xffffffffffffffffULL;
int b_idx, edge;
for( b_idx=12, edge=0; edge<edges; edge+=step, b_idx+=8*step ) {
if (!mask_dir)
__asm__ volatile(
"pand %0, %%mm0 \n\t"
::"m"(mask_dir)
"pxor %%mm0, %%mm0 \n\t"
::
);
if(!(mask_mv & edge)) {
if(bidir) {
@ -193,8 +194,8 @@ static void h264_loop_filter_strength_mmx2( int16_t bS[2][4][4], uint8_t nnz[40]
// could do a special case for dir==0 && edges==1, but it only reduces the
// average filter time by 1.2%
h264_loop_filter_strength_iteration_mmx2(bS, nnz, ref, mv, bidir, edges, step, mask_mv1, 1, -8);
h264_loop_filter_strength_iteration_mmx2(bS, nnz, ref, mv, bidir, 4, 1, mask_mv0, 0, -1);
h264_loop_filter_strength_iteration_mmx2(bS, nnz, ref, mv, bidir, edges, step, mask_mv1, 1, -8, 0);
h264_loop_filter_strength_iteration_mmx2(bS, nnz, ref, mv, bidir, 4, 1, mask_mv0, 0, -1, -1);
__asm__ volatile(
"movq (%0), %%mm0 \n\t"