Module Name: src
Committed By: joerg
Date: Tue Feb 23 00:03:10 UTC 2010
Modified Files:
src/include: math.h
Log Message:
PR 36988: ISO C99 mandates that HUGE_VAL, HUGE_VALF, HUGE_VALL and
INFINITY are constant expressions.
Use the GCC builtins if possible to implement them.
To generate a diff of this commit:
cvs rdiff -u -r1.50 -r1.51 src/include/math.h
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/include/math.h
diff -u src/include/math.h:1.50 src/include/math.h:1.51
--- src/include/math.h:1.50 Mon Jan 11 16:28:39 2010
+++ src/include/math.h Tue Feb 23 00:03:09 2010
@@ -1,4 +1,4 @@
-/* $NetBSD: math.h,v 1.50 2010/01/11 16:28:39 christos Exp $ */
+/* $NetBSD: math.h,v 1.51 2010/02/23 00:03:09 joerg Exp $ */
/*
* ====================================================
@@ -59,8 +59,12 @@
* ANSI/POSIX
*/
/* 7.12#3 HUGE_VAL, HUGELF, HUGE_VALL */
+#if __GNUC_PREREQ__(3, 3)
+#define HUGE_VAL __builtin_huge_val()
+#else
extern const union __double_u __infinity;
#define HUGE_VAL __infinity.__val
+#endif
/*
* ISO C99
@@ -72,14 +76,21 @@
((_XOPEN_SOURCE - 0) >= 600) || \
defined(_ISOC99_SOURCE) || defined(_NETBSD_SOURCE)
/* 7.12#3 HUGE_VAL, HUGELF, HUGE_VALL */
+#if __GNUC_PREREQ__(3, 3)
+#define HUGE_VALF __builtin_huge_valf()
+#define HUGE_VALL __builtin_huge_vall()
+#else
extern const union __float_u __infinityf;
#define HUGE_VALF __infinityf.__val
extern const union __long_double_u __infinityl;
#define HUGE_VALL __infinityl.__val
+#endif
/* 7.12#4 INFINITY */
-#ifdef __INFINITY
+#if __GNUC_PREREQ__(3, 3)
+#define INFINITY __builtin_inff()
+#elif defined(__INFINITY)
#define INFINITY __INFINITY /* float constant which overflows */
#else
#define INFINITY HUGE_VALF /* positive infinity */
