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x86: sbrdsp: Implement SSE sum64x5

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698 to 174 cycles on Arrandale. Unrolling is a 6 cycles gain.

Signed-off-by: Diego Biurrun <diego@biurrun.de>
This commit is contained in:
Christophe Gisquet 2012-11-24 23:15:07 +01:00 committed by Diego Biurrun
parent 5b4dfbffc2
commit 44a0036d10
2 changed files with 24 additions and 0 deletions
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22
libavcodec/x86/sbrdsp.asm
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@ -181,3 +181,25 @@ cglobal sbr_hf_gen, 4,4,8, X_high, X_low, alpha0, alpha1, BW, S, E
add start, 16
jnz .loop2
RET
cglobal sbr_sum64x5, 1,2,4,z
lea r1q, [zq+ 256]
.loop:
mova m0, [zq+ 0]
mova m2, [zq+ 16]
mova m1, [zq+ 256]
mova m3, [zq+ 272]
addps m0, [zq+ 512]
addps m2, [zq+ 528]
addps m1, [zq+ 768]
addps m3, [zq+ 784]
addps m0, [zq+1024]
addps m2, [zq+1040]
addps m0, m1
addps m2, m3
mova [zq], m0
mova [zq+16], m2
add zq, 32
cmp zq, r1q
jne .loop
REP_RET

2
libavcodec/x86/sbrdsp_init.c
View File

@ -25,6 +25,7 @@
#include "libavcodec/sbrdsp.h"
float ff_sbr_sum_square_sse(float (*x)[2], int n);
void ff_sbr_sum64x5_sse(float *z);
void ff_sbr_hf_g_filt_sse(float (*Y)[2], const float (*X_high)[40][2],
const float *g_filt, int m_max, intptr_t ixh);
void ff_sbr_hf_gen_sse(float (*X_high)[2], const float (*X_low)[2],
@ -37,6 +38,7 @@ void ff_sbrdsp_init_x86(SBRDSPContext *s)
if (EXTERNAL_SSE(mm_flags)) {
s->sum_square = ff_sbr_sum_square_sse;
s->sum64x5 = ff_sbr_sum64x5_sse;
s->hf_g_filt = ff_sbr_hf_g_filt_sse;
s->hf_gen = ff_sbr_hf_gen_sse;
}