mesa: add signbit() macro

Reviewed-by: Matt Turner <mattst88@gmail.com>
2012-09-24 13:20:33 -06:00
parent defe8f0da2
commit 14ca76646a
1 changed files with 7 additions and 0 deletions
@@ -145,6 +145,13 @@ static inline int isblank(int ch) { return ch == ' ' || ch == '\t'; }
 /*@}*/


+/*
+ * signbit() is a macro on Linux.  Not available on Windows.
+ */
+#ifndef signbit
+#define signbit(x) ((x) < 0.0f)
+#endif
+

 /** single-precision inverse square root */
 static inline float