From 6865e04620fa14eada30866cd8efbcbd9157537b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?M=C3=A5ns=20Rullg=C3=A5rd?= <mans@mansr.com>
Date: Tue, 15 Jul 2008 19:06:29 +0000
Subject: [PATCH] ARM: optimised MUL64

Originally committed as revision 14244 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavcodec/armv4l/mathops.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/libavcodec/armv4l/mathops.h b/libavcodec/armv4l/mathops.h
index dd53310683..e42cefb430 100644
--- a/libavcodec/armv4l/mathops.h
+++ b/libavcodec/armv4l/mathops.h
@@ -48,6 +48,15 @@ static inline av_const int MULH(int a, int b)
      hi; })
 #endif
 
+static inline av_const int64_t MUL64(int a, int b)
+{
+    union { uint64_t x; unsigned hl[2]; } x;
+    asm ("smull %0, %1, %2, %3"
+         : "=r"(x.hl[0]), "=r"(x.hl[1]) : "r"(a), "r"(b));
+    return x.x;
+}
+#define MUL64 MUL64
+
 #if defined(HAVE_ARMV5TE)
 
 /* signed 16x16 -> 32 multiply add accumulate */