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Diffstat (limited to '3rdparty/lzma/C/RotateDefs.h')
-rw-r--r--3rdparty/lzma/C/RotateDefs.h12
1 files changed, 11 insertions, 1 deletions
diff --git a/3rdparty/lzma/C/RotateDefs.h b/3rdparty/lzma/C/RotateDefs.h
index c3a1385ce5a..8f01d1a6c59 100644
--- a/3rdparty/lzma/C/RotateDefs.h
+++ b/3rdparty/lzma/C/RotateDefs.h
@@ -1,5 +1,5 @@
/* RotateDefs.h -- Rotate functions
-2009-02-07 : Igor Pavlov : Public domain */
+2015-03-25 : Igor Pavlov : Public domain */
#ifndef __ROTATE_DEFS_H
#define __ROTATE_DEFS_H
@@ -7,11 +7,21 @@
#ifdef _MSC_VER
#include <stdlib.h>
+
+/* don't use _rotl with MINGW. It can insert slow call to function. */
+
+/* #if (_MSC_VER >= 1200) */
+#pragma intrinsic(_rotl)
+#pragma intrinsic(_rotr)
+/* #endif */
+
#define rotlFixed(x, n) _rotl((x), (n))
#define rotrFixed(x, n) _rotr((x), (n))
#else
+/* new compilers can translate these macros to fast commands. */
+
#define rotlFixed(x, n) (((x) << (n)) | ((x) >> (32 - (n))))
#define rotrFixed(x, n) (((x) >> (n)) | ((x) << (32 - (n))))