Changeset 940 for trunk/src/core.hTweet

Timestamp:

Sep 10, 2011, 4:55:44 PM (12 years ago)

Author:

sam

Message:

core: add our custom isnan() macro to the core headers.

File:

• trunk/src/core.h (modified) (1 diff)

trunk/src/core.h

@@ -46 +46 @@
 #endif
 
+/* Ensure isnan() is present even on systems that don't define it, or
+ * when -ffast-math is being used. */
+#if defined __FAST_MATH__
+#   undef isnan
+#endif
+#if !defined isnan
+#   define isnan isnan
+#   include <stdint.h>
+static inline int isnan(float f)
+{
+    union { float f; uint32_t x; } u = { f };
+    return (u.x << 1) > 0xff000000u;
+}
+#endif
+
 // Base types
 #include "trig.h"