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x86: sbrdsp: Implement SSE qmf_post_shuffle 

255 to 174 cycles on Arrandale / Win64. Unrolling yields no gain.

Signed-off-by: Diego Biurrun <diego@biurrun.de>
This commit is contained in:
Christophe Gisquet 2012-11-25 07:55:28 +01:00 committed by Diego Biurrun
parent 44a0036d10
commit 4f50646697
2 changed files with 22 additions and 0 deletions
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20
libavcodec/x86/sbrdsp.asm
View File

@ -24,6 +24,7 @@
SECTION_RODATA
; mask equivalent for multiply by -1.0 1.0
ps_mask times 2 dd 1<<31, 0
ps_neg times 4 dd 1<<31
SECTION_TEXT
@ -203,3 +204,22 @@ cglobal sbr_sum64x5, 1,2,4,z
cmp zq, r1q
jne .loop
REP_RET
INIT_XMM sse
cglobal sbr_qmf_post_shuffle, 2,3,4,W,z
lea r2q, [zq + (64-4)*4]
mova m3, [ps_neg]
.loop:
mova m1, [zq]
xorps m0, m3, [r2q]
shufps m0, m0, m0, q0123
unpcklps m2, m0, m1
unpckhps m0, m0, m1
mova [Wq + 0], m2
mova [Wq + 16], m0
add Wq, 32
sub r2q, 16
add zq, 16
cmp zq, r2q
jl .loop
REP_RET

2
libavcodec/x86/sbrdsp_init.c
View File

@ -31,6 +31,7 @@ void ff_sbr_hf_g_filt_sse(float (*Y)[2], const float (*X_high)[40][2],
void ff_sbr_hf_gen_sse(float (*X_high)[2], const float (*X_low)[2],
const float alpha0[2], const float alpha1[2],
float bw, int start, int end);
void ff_sbr_qmf_post_shuffle_sse(float W[32][2], const float *z);
void ff_sbrdsp_init_x86(SBRDSPContext *s)
{
@ -41,5 +42,6 @@ void ff_sbrdsp_init_x86(SBRDSPContext *s)
s->sum64x5 = ff_sbr_sum64x5_sse;
s->hf_g_filt = ff_sbr_hf_g_filt_sse;
s->hf_gen = ff_sbr_hf_gen_sse;
s->qmf_post_shuffle = ff_sbr_qmf_post_shuffle_sse;
}
}