Has a slight speedup.
Can't be carried over to aarch64, since it has no shufps-like instruction.
>From 6b09809a05c0d0bd916f7f6de5b205965bf4b69a Mon Sep 17 00:00:00 2001
From: Lynne <d...@lynne.ee>
Date: Wed, 24 Apr 2019 12:19:48 +0100
Subject: [PATCH] x86/opusdsp: replace loads with shuffles
Has a slight speedup.
Can't be carried over to aarch64, since it has no shufps-like instruction.
---
libavcodec/x86/opusdsp.asm | 9 +++------
1 file changed, 3 insertions(+), 6 deletions(-)
diff --git a/libavcodec/x86/opusdsp.asm b/libavcodec/x86/opusdsp.asm
index 6c99821b89..f5d206a8b1 100644
--- a/libavcodec/x86/opusdsp.asm
+++ b/libavcodec/x86/opusdsp.asm
@@ -24,9 +24,6 @@ SECTION_RODATA
; 0.85..^1 0.85..^2 0.85..^3 0.85..^4
tab_st: dd 0x3f599a00, 0x3f38f671, 0x3f1d382a, 0x3f05a32f
-tab_x0: dd 0x0, 0x3f599a00, 0x3f599a00, 0x3f599a00
-tab_x1: dd 0x0, 0x0, 0x3f38f671, 0x3f38f671
-tab_x2: dd 0x0, 0x0, 0x0, 0x3f1d382a
SECTION .text
@@ -45,9 +42,9 @@ cglobal opus_deemphasis, 4, 4, 8, out, in, coeff, len
%endif
movaps m4, [tab_st]
- movaps m5, [tab_x0]
- movaps m6, [tab_x1]
- movaps m7, [tab_x2]
+ VBROADCASTSS m5, m4
+ shufps m6, m4, m4, q1111
+ shufps m7, m4, m4, q2222
.loop:
movaps m1, [inq] ; x0, x1, x2, x3
--
2.20.1
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