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Make mmx VP8 WHT faster 

Avoid pextrw, since it's slow on many older CPUs.
Now it doesn't require mmxext either.

Originally committed as revision 24397 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Jason Garrett-Glaser 2010-07-21 20:51:01 +00:00
parent a4e6fa86ce
commit b8b231b5dc
2 changed files with 24 additions and 19 deletions
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4
libavcodec/x86/vp8dsp-init.c
View File

@ -220,7 +220,7 @@ HVBILIN(ssse3, 8, 16, 16)
extern void ff_vp8_idct_dc_add_mmx(uint8_t *dst, DCTELEM block[16], int stride);
extern void ff_vp8_idct_dc_add_sse4(uint8_t *dst, DCTELEM block[16], int stride);
extern void ff_vp8_luma_dc_wht_mmxext(DCTELEM block[4][4][16], DCTELEM dc[16]);
extern void ff_vp8_luma_dc_wht_mmx(DCTELEM block[4][4][16], DCTELEM dc[16]);
extern void ff_vp8_idct_add_mmx(uint8_t *dst, DCTELEM block[16], int stride);
extern void ff_vp8_v_loop_filter_simple_mmx (uint8_t *dst, int stride, int flim);
@ -315,6 +315,7 @@ av_cold void ff_vp8dsp_init_x86(VP8DSPContext* c)
if (mm_flags & FF_MM_MMX) {
c->vp8_idct_dc_add = ff_vp8_idct_dc_add_mmx;
c->vp8_idct_add = ff_vp8_idct_add_mmx;
c->vp8_luma_dc_wht = ff_vp8_luma_dc_wht_mmx;
c->put_vp8_epel_pixels_tab[0][0][0] =
c->put_vp8_bilinear_pixels_tab[0][0][0] = ff_put_vp8_pixels16_mmx;
c->put_vp8_epel_pixels_tab[1][0][0] =
@ -337,7 +338,6 @@ av_cold void ff_vp8dsp_init_x86(VP8DSPContext* c)
/* note that 4-tap width=16 functions are missing because w=16
* is only used for luma, and luma is always a copy or sixtap. */
if (mm_flags & FF_MM_MMX2) {
c->vp8_luma_dc_wht = ff_vp8_luma_dc_wht_mmxext;
VP8_LUMA_MC_FUNC(0, 16, mmxext);
VP8_MC_FUNC(1, 8, mmxext);
VP8_MC_FUNC(2, 4, mmxext);

39
libavcodec/x86/vp8dsp.asm
View File

@ -1034,15 +1034,25 @@ cglobal vp8_idct_add_mmx, 3, 3
; void vp8_luma_dc_wht_mmxext(DCTELEM block[4][4][16], DCTELEM dc[16])
;-----------------------------------------------------------------------------
%macro SCATTER_WHT 1
pextrw r1d, m0, %1
pextrw r2d, m1, %1
mov [r0+2*16*0], r1w
mov [r0+2*16*1], r2w
pextrw r1d, m2, %1
pextrw r2d, m3, %1
mov [r0+2*16*2], r1w
mov [r0+2*16*3], r2w
%macro SCATTER_WHT 3
movd r1d, m%1
movd r2d, m%2
mov [r0+2*16*(0+%3)], r1w
mov [r0+2*16*(1+%3)], r2w
shr r1d, 16
shr r2d, 16
psrlq m%1, 32
psrlq m%2, 32
mov [r0+2*16*(4+%3)], r1w
mov [r0+2*16*(5+%3)], r2w
movd r1d, m%1
movd r2d, m%2
mov [r0+2*16*(8+%3)], r1w
mov [r0+2*16*(9+%3)], r2w
shr r1d, 16
shr r2d, 16
mov [r0+2*16*(12+%3)], r1w
mov [r0+2*16*(13+%3)], r2w
%endmacro
%macro HADAMARD4_1D 4
@ -1052,7 +1062,7 @@ cglobal vp8_idct_add_mmx, 3, 3
%endmacro
INIT_MMX
cglobal vp8_luma_dc_wht_mmxext, 2,3
cglobal vp8_luma_dc_wht_mmx, 2,3
movq m0, [r1]
movq m1, [r1+8]
movq m2, [r1+16]
@ -1065,13 +1075,8 @@ cglobal vp8_luma_dc_wht_mmxext, 2,3
psraw m1, 3
psraw m2, 3
psraw m3, 3
SCATTER_WHT 0
add r0, 2*16*4
SCATTER_WHT 1
add r0, 2*16*4
SCATTER_WHT 2
add r0, 2*16*4
SCATTER_WHT 3
SCATTER_WHT 0, 1, 0
SCATTER_WHT 2, 3, 2
RET
;-----------------------------------------------------------------------------