From: Yann Collet <cyan@fb.com>
Date: Sat, 14 Nov 2020 22:26:08 +0000 (-0800)
Subject: restrict BitScanForward() to VS2005+
X-Git-Tag: upstream/1.9.3~1^2~4
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=581c459b4ec4bbaae518a0ef9baa552f21f9e24e;p=platform%2Fupstream%2Flz4.git

restrict BitScanForward() to VS2005+

suggested by @aqrit in #947
---

diff --git a/lib/lz4.c b/lib/lz4.c
index 5fe3433..5c6cf4d 100644
--- a/lib/lz4.c
+++ b/lib/lz4.c
@@ -533,7 +533,7 @@ static unsigned LZ4_NbCommonBytes (reg_t val)
             return (unsigned)(((U64)((val & (m - 1)) * m)) >> 56);
 #       endif
         } else /* 32 bits */ {
-#       if defined(_MSC_VER) && !defined(LZ4_FORCE_SW_BITCOUNT)
+#       if defined(_MSC_VER) && (_MSC_VER >= 1400) && !defined(LZ4_FORCE_SW_BITCOUNT)
             unsigned long r;
             _BitScanForward(&r, (U32)val);
             return (unsigned)r >> 3;