Ticket #6230: math.h.2.diff

headers/posix/math.h

@@ -21 +21 @@
 #define M_SQRT1_2       0.70710678118654752440  /* 1/sqrt(2) */
 
 /* platform independent IEEE floating point special values */
-#define __HUGE_VAL_v    0x7ff0000000000000LL
-#define __huge_val_t    union { unsigned char __c[8]; long long __ll; double __d; }
-#ifndef HUGE_VAL
-#   define HUGE_VAL     (((__huge_val_t) { __ll: __HUGE_VAL_v }).__d)
+#if __GNUC__ >= 4
+#   ifndef HUGE_VAL
+#       define HUGE_VAL     __builtin_huge_val()
+#   endif
+#else
+#   define  __HUGE_VAL_v    0x7ff0000000000000LL
+#   define __huge_val_t union { unsigned char __c[8]; long long __ll; double __d; }
+#   ifndef HUGE_VAL
+#       define HUGE_VAL     (((__huge_val_t) { __ll: __HUGE_VAL_v }).__d)
+#   endif
 #endif
 
-#define __HUGE_VALF_v   0x7f800000L
-#define __huge_valf_t   union { unsigned char __c[4]; long __l; float __f; }
-#define HUGE_VALF       (((__huge_valf_t) { __l: __HUGE_VALF_v }).__f)
+#if __GNUC__ >= 4
+#   define HUGE_VALF        __builtin_huge_valf()
+#else
+#   define __HUGE_VALF_v    0x7f800000L
+#   define __huge_valf_t    union { unsigned char __c[4]; long __l; float __f; }
+#   define HUGE_VALF        (((__huge_valf_t) { __l: __HUGE_VALF_v }).__f)
+#endif
 
-/* TODO: define HUGE_VALL for long doubles */
+/* TODO: define HUGE_VALL for long doubles for gcc2 */
+#if __GNUC__ >= 4
+#   define HUGE_VALL        __builtin_huge_vall()
+#endif
 
-#define __NAN_VALF_v    0x7fc00000L
-#define NAN             (((__huge_valf_t) { __l: __NAN_VALF_v }).__f)
+#if __GNUC__ >= 4
+#   define NAN              __builtin_nanf("")
+#else
+#   define __NAN_VALF_v 0x7fc00000L
+#   define NAN              (((__huge_valf_t) { __l: __NAN_VALF_v }).__f)
+#endif
 
-#define INFINITY        HUGE_VALF
+#if __GNUC__ >= 4
+#   define INFINITY     __builtin_inff()
+#else
+#   define INFINITY     HUGE_VALF
+#endif
 
 /* floating-point categories */
 #define FP_NAN          0