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-rw-r--r--mesalib/src/gallium/auxiliary/util/u_math.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/mesalib/src/gallium/auxiliary/util/u_math.h b/mesalib/src/gallium/auxiliary/util/u_math.h
index 404bd21e1..f6196665f 100644
--- a/mesalib/src/gallium/auxiliary/util/u_math.h
+++ b/mesalib/src/gallium/auxiliary/util/u_math.h
@@ -340,6 +340,9 @@ util_is_inf_or_nan(float x)
* Find first bit set in word. Least significant bit is 1.
* Return 0 if no bits set.
*/
+#ifndef FFS_DEFINED
+#define FFS_DEFINED 1
+
#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)
@@ -372,6 +375,8 @@ unsigned ffs( unsigned u )
#define ffs __builtin_ffs
#endif
+#endif /* FFS_DEFINED */
+
/* Destructively loop over all of the bits in a mask as in:
*