[FFmpeg-cvslog] x86: sbrdsp: implement SSE2 qmf_pre_shuffle

[Christophe Gisquet]

ffmpeg | branch: master | Christophe Gisquet <christophe.gisquet at gmail.com> | Sun Nov 25 09:10:36 2012 +0100| [2c299d4165cd9653153e12270971c2368551b79e] | committer: Anton Khirnov

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 at khirnov.net>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=2c299d4165cd9653153e12270971c2368551b79e
---

 libavcodec/x86/sbrdsp.asm    |   30 ++++++++++++++++++++++++++++++
 libavcodec/x86/sbrdsp_init.c |    2 ++
 2 files changed, 32 insertions(+)

diff --git a/libavcodec/x86/sbrdsp.asm b/libavcodec/x86/sbrdsp.asm
index bfc37c2..36a0918 100644
--- a/libavcodec/x86/sbrdsp.asm
+++ b/libavcodec/x86/sbrdsp.asm
@@ -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
diff --git a/libavcodec/x86/sbrdsp_init.c b/libavcodec/x86/sbrdsp_init.c
index f3f6c65..e2eaa70 100644
--- a/libavcodec/x86/sbrdsp_init.c
+++ b/libavcodec/x86/sbrdsp_init.c
@@ -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;
     }
 }