Move FASTDIV macro to intmath.h

Originally committed as revision 21335 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 37 insertions, 0 deletions

diff --git a/libavutil/x86/intmath.h b/libavutil/x86/intmath.h
new file mode 100644
index 0000000000..7528c55dc8
--- /dev/null
+++ b/libavutil/x86/intmath.h
@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2010 Mans Rullgard <mans@mansr.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_X86_INTMATH_H
+#define AVUTIL_X86_INTMATH_H
+
+#include "libavutil/common.h"
+
+#define FASTDIV(a,b) \
+    ({\
+        int ret, dmy;\
+        __asm__ volatile(\
+            "mull %3"\
+            :"=d"(ret), "=a"(dmy)\
+            :"1"(a), "g"(ff_inverse[b])\
+            );\
+        ret;\
+    })
+
+#endif /* AVUTIL_X86_INTMATH_H */