From f617adedc8766ad7bccb4b996a943ef7fcb7796f Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Tue, 22 Aug 2006 12:07:02 +0000
Subject: [PATCH] replace MULL with asm too, no significnat speedup but its
 probably better to not take any chances, some versions of gcc will almost
 certainly mess it up too if they can

Originally committed as revision 6049 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavcodec/mpegaudiodec.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/libavcodec/mpegaudiodec.c b/libavcodec/mpegaudiodec.c
index 5ad8c69a52..55276e3b58 100644
--- a/libavcodec/mpegaudiodec.c
+++ b/libavcodec/mpegaudiodec.c
@@ -44,7 +44,13 @@
 #define FRAC_ONE    (1 << FRAC_BITS)
 
 #ifdef ARCH_X86
-#   define MULL(a,b) (((int64_t)(a) * (int64_t)(b)) >> FRAC_BITS)
+#   define MULL(ra, rb) \
+        ({ int rt, dummy; asm (\
+            "imull %3               \n\t"\
+            "shrdl %4, %%edx, %%eax \n\t"\
+            : "=a"(rt), "=d"(dummy)\
+            : "a" (ra), "rm" (rb), "i"(FRAC_BITS));\
+         rt; })
 #   define MUL64(ra, rb) \
         ({ int64_t rt; asm ("imull %2\n\t" : "=A"(rt) : "a" (ra), "g" (rb)); rt; })
 #   define MULH(ra, rb) \