[FFmpeg-cvslog] x86: sbrdsp: Implement SSE neg_odd_64
Christophe Gisquet
git at videolan.org
Sat Apr 6 13:35:19 CEST 2013
ffmpeg | branch: master | Christophe Gisquet <christophe.gisquet at gmail.com> | Fri Dec 21 18:11:06 2012 +0100| [f4b0d12f5b3fb2fe825fb2ac9b2d9d9374baa5c5] | committer: Diego Biurrun
x86: sbrdsp: Implement SSE neg_odd_64
Timing on Arrandale:
C SSE
Win32: 57 44
Win64: 47 38
Unrolling and not storing mask both save some cycles.
Signed-off-by: Diego Biurrun <diego at biurrun.de>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=f4b0d12f5b3fb2fe825fb2ac9b2d9d9374baa5c5
---
libavcodec/x86/sbrdsp.asm | 22 ++++++++++++++++++++++
libavcodec/x86/sbrdsp_init.c | 2 ++
2 files changed, 24 insertions(+)
diff --git a/libavcodec/x86/sbrdsp.asm b/libavcodec/x86/sbrdsp.asm
index ae84490..5e54505 100644
--- a/libavcodec/x86/sbrdsp.asm
+++ b/libavcodec/x86/sbrdsp.asm
@@ -24,6 +24,7 @@
SECTION_RODATA
; mask equivalent for multiply by -1.0 1.0
ps_mask times 2 dd 1<<31, 0
+ps_mask2 times 2 dd 0, 1<<31
ps_neg times 4 dd 1<<31
SECTION_TEXT
@@ -223,3 +224,24 @@ cglobal sbr_qmf_post_shuffle, 2,3,4,W,z
cmp zq, r2q
jl .loop
REP_RET
+
+INIT_XMM sse
+cglobal sbr_neg_odd_64, 1,2,4,z
+ lea r1q, [zq+256]
+.loop:
+ mova m0, [zq+ 0]
+ mova m1, [zq+16]
+ mova m2, [zq+32]
+ mova m3, [zq+48]
+ xorps m0, [ps_mask2]
+ xorps m1, [ps_mask2]
+ xorps m2, [ps_mask2]
+ xorps m3, [ps_mask2]
+ mova [zq+ 0], m0
+ mova [zq+16], m1
+ mova [zq+32], m2
+ mova [zq+48], m3
+ add zq, 64
+ cmp zq, r1q
+ jne .loop
+ REP_RET
diff --git a/libavcodec/x86/sbrdsp_init.c b/libavcodec/x86/sbrdsp_init.c
index 27fade1..cb65a23 100644
--- a/libavcodec/x86/sbrdsp_init.c
+++ b/libavcodec/x86/sbrdsp_init.c
@@ -32,6 +32,7 @@ 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_neg_odd_64_sse(float *z);
void ff_sbr_qmf_post_shuffle_sse(float W[32][2], const float *z);
av_cold void ff_sbrdsp_init_x86(SBRDSPContext *s)
@@ -39,6 +40,7 @@ av_cold void ff_sbrdsp_init_x86(SBRDSPContext *s)
int mm_flags = av_get_cpu_flags();
if (EXTERNAL_SSE(mm_flags)) {
+ s->neg_odd_64 = ff_sbr_neg_odd_64_sse;
s->sum_square = ff_sbr_sum_square_sse;
s->sum64x5 = ff_sbr_sum64x5_sse;
s->hf_g_filt = ff_sbr_hf_g_filt_sse;
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