From: José Fonseca <jfonseca@vmware.com>
Date: Mon, 1 Jun 2009 15:58:34 +0000 (-0700)
Subject: util: Add _BitScanForward intrinsic's declaration.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=88b88bba68af2f5d3243ebc77f32e47aa747d5f7;p=mesa.git

util: Add _BitScanForward intrinsic's declaration.

It is missing in some Microsoft DDKs.
---

diff --git a/src/gallium/auxiliary/util/u_math.h b/src/gallium/auxiliary/util/u_math.h
index b12c97dfb4d..b428dc544c3 100644
--- a/src/gallium/auxiliary/util/u_math.h
+++ b/src/gallium/auxiliary/util/u_math.h
@@ -354,7 +354,9 @@ util_is_pot(unsigned x)
  * Find first bit set in word.  Least significant bit is 1.
  * Return 0 if no bits set.
  */
-#if defined(_MSC_VER) && _MSC_VER >= 1300
+#if defined(_MSC_VER) && _MSC_VER >= 1300 && (_M_IX86 || _M_AMD64 || _M_IA64)
+unsigned char _BitScanForward(unsigned long* Index, unsigned long Mask);
+#pragma intrinsic(_BitScanForward)
 static INLINE
 unsigned long ffs( unsigned long u )
 {