From a2af8eddab75f1eac712411e4dde89823c0845e8 Mon Sep 17 00:00:00 2001
From: James Almer <jamrial@gmail.com>
Date: Sat, 22 Feb 2014 02:47:01 -0300
Subject: x86: add detection for FMA3 instruction set

Based on x264 code

Signed-off-by: James Almer <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
---
 libavutil/x86/cpu.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'libavutil/x86/cpu.c')

diff --git a/libavutil/x86/cpu.c b/libavutil/x86/cpu.c
index 18049eaead..333b0f805f 100644
--- a/libavutil/x86/cpu.c
+++ b/libavutil/x86/cpu.c
@@ -131,8 +131,11 @@ int ff_get_cpu_flags_x86(void)
         if ((ecx & 0x18000000) == 0x18000000) {
             /* Check for OS support */
             xgetbv(0, eax, edx);
-            if ((eax & 0x6) == 0x6)
+            if ((eax & 0x6) == 0x6) {
                 rval |= AV_CPU_FLAG_AVX;
+                if (ecx&0x00001000)
+                    rval |= AV_CPU_FLAG_FMA3;
+            }
         }
 #if HAVE_AVX2
     if (max_std_level >= 7) {
-- 
cgit v1.2.3