Re: [FFmpeg-devel] [PATCH] avcodec/x86/audiodsp: add scalarproduct avx2

[Paul B Mahol]

On 9/12/22, Paul B Mahol <one...@gmail.com> wrote:
> Patch attached.
>
> How to get more speed?
>

Thanks for review, updated patch attached.

From 2a5bab90b863c7cc9dbbb4d3d3021bec8ab09843 Mon Sep 17 00:00:00 2001
From: Paul B Mahol <one...@gmail.com>
Date: Mon, 12 Sep 2022 18:53:31 +0200
Subject: [PATCH] avcodec/x86/audiodsp: add scalarproduct avx2

Signed-off-by: Paul B Mahol <one...@gmail.com>
---
 libavcodec/x86/audiodsp.asm    | 16 ++++++++++++++++
 libavcodec/x86/audiodsp_init.c |  6 ++++++
 2 files changed, 22 insertions(+)

diff --git a/libavcodec/x86/audiodsp.asm b/libavcodec/x86/audiodsp.asm
index b604b0443c..88e3fefef2 100644
--- a/libavcodec/x86/audiodsp.asm
+++ b/libavcodec/x86/audiodsp.asm
@@ -44,6 +44,22 @@ cglobal scalarproduct_int16, 3,3,3, v1, v2, order
     movd   eax, m2
     RET
 
+INIT_YMM avx2
+cglobal scalarproduct_int16, 3,3,2, v1, v2, order
+    add orderd, orderd
+    add v1q, orderq
+    add v2q, orderq
+    neg orderq
+    pxor    m1, m1
+.loop:
+    movu    m0, [v1q + orderq]
+    pmaddwd m0, [v2q + orderq]
+    paddd   m1, m0
+    add     orderq, mmsize
+    jl .loop
+    HADDD   m1, m0
+    movd   eax, xm1
+    RET
 
 ;-----------------------------------------------------------------------------
 ; void ff_vector_clip_int32(int32_t *dst, const int32_t *src, int32_t min,
diff --git a/libavcodec/x86/audiodsp_init.c b/libavcodec/x86/audiodsp_init.c
index aa5e43e570..77d5948442 100644
--- a/libavcodec/x86/audiodsp_init.c
+++ b/libavcodec/x86/audiodsp_init.c
@@ -24,6 +24,9 @@
 #include "libavutil/x86/cpu.h"
 #include "libavcodec/audiodsp.h"
 
+int32_t ff_scalarproduct_int16_avx2(const int16_t *v1, const int16_t *v2,
+                                    int order);
+
 int32_t ff_scalarproduct_int16_sse2(const int16_t *v1, const int16_t *v2,
                                     int order);
 
@@ -53,4 +56,7 @@ av_cold void ff_audiodsp_init_x86(AudioDSPContext *c)
 
     if (EXTERNAL_SSE4(cpu_flags))
         c->vector_clip_int32 = ff_vector_clip_int32_sse4;
+
+    if (EXTERNAL_AVX2(cpu_flags))
+        c->scalarproduct_int16 = ff_scalarproduct_int16_avx2;
 }
-- 
2.37.2


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