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x86: sbrdsp: implement SSE2 qmf_pre_shuffle 

From 253 to 51 cycles on Arrandale and Win64.
44 cycles on SandyBridge.

Signed-off-by: Anton Khirnov <anton@khirnov.net>
This commit is contained in:
Christophe Gisquet 2012-11-25 09:10:36 +01:00 committed by Anton Khirnov
parent 16a4a18db0
commit 2c299d4165
2 changed files with 32 additions and 0 deletions
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30
libavcodec/x86/sbrdsp.asm
View File

@ -273,3 +273,33 @@ cglobal sbr_qmf_deint_bfly, 3,5,8, v,src0,src1,vrev,c
sub cq, 2*mmsize
jge .loop
REP_RET
INIT_XMM sse2
cglobal sbr_qmf_pre_shuffle, 1,4,6,z
%define OFFSET (32*4-2*mmsize)
mov r3q, OFFSET
lea r1q, [zq + (32+1)*4]
lea r2q, [zq + 64*4]
mova m5, [ps_neg]
.loop:
movu m0, [r1q]
movu m2, [r1q + mmsize]
movu m1, [zq + r3q + 4 + mmsize]
movu m3, [zq + r3q + 4]
pxor m2, m5
pxor m0, m5
pshufd m2, m2, q0123
pshufd m0, m0, q0123
SBUTTERFLY dq, 2, 3, 4
SBUTTERFLY dq, 0, 1, 4
mova [r2q + 2*r3q + 0*mmsize], m2
mova [r2q + 2*r3q + 1*mmsize], m3
mova [r2q + 2*r3q + 2*mmsize], m0
mova [r2q + 2*r3q + 3*mmsize], m1
add r1q, 2*mmsize
sub r3q, 2*mmsize
jge .loop
movq m2, [zq]
movq [r2q], m2
REP_RET

2
libavcodec/x86/sbrdsp_init.c
View File

@ -35,6 +35,7 @@ void ff_sbr_hf_gen_sse(float (*X_high)[2], const float (*X_low)[2],
void ff_sbr_neg_odd_64_sse(float *z);
void ff_sbr_qmf_post_shuffle_sse(float W[32][2], const float *z);
void ff_sbr_qmf_deint_bfly_sse2(float *v, const float *src0, const float *src1);
void ff_sbr_qmf_pre_shuffle_sse2(float *z);
av_cold void ff_sbrdsp_init_x86(SBRDSPContext *s)
{
@ -51,5 +52,6 @@ av_cold void ff_sbrdsp_init_x86(SBRDSPContext *s)
if (EXTERNAL_SSE2(mm_flags)) {
s->qmf_deint_bfly = ff_sbr_qmf_deint_bfly_sse2;
s->qmf_pre_shuffle = ff_sbr_qmf_pre_shuffle_sse2;
}
}