Module Name: src
Committed By: matt
Date: Thu Jul 7 18:23:18 UTC 2011
Modified Files:
src/sys/sys: float_ieee754.h
Log Message:
Use a builtin __FOO__ for FOO if >= GCC 3.3
If C99, use hex floating point.
To generate a diff of this commit:
cvs rdiff -u -r1.8 -r1.9 src/sys/sys/float_ieee754.h
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/sys/float_ieee754.h
diff -u src/sys/sys/float_ieee754.h:1.8 src/sys/sys/float_ieee754.h:1.9
--- src/sys/sys/float_ieee754.h:1.8 Sun Dec 11 12:25:20 2005
+++ src/sys/sys/float_ieee754.h Thu Jul 7 18:23:18 2011
@@ -1,4 +1,4 @@
-/* $NetBSD: float_ieee754.h,v 1.8 2005/12/11 12:25:20 christos Exp $ */
+/* $NetBSD: float_ieee754.h,v 1.9 2011/07/07 18:23:18 matt Exp $ */
/*
* Copyright (c) 1992, 1993
@@ -57,33 +57,72 @@
defined(_ISOC99_SOURCE) || defined(_NETBSD_SOURCE)
#ifndef FLT_EVAL_METHOD
#if __GNUC_PREREQ__(3, 3)
-#define FLT_EVAL_METHOD __FLT_EVAL_METHOD__
+#define FLT_EVAL_METHOD __FLT_EVAL_METHOD__
#endif /* GCC >= 3.3 */
#endif /* defined(FLT_EVAL_METHOD) */
#endif /* !defined(_ANSI_SOURCE) && ... */
+#if __GNUC_PREREQ__(3, 3)
+/*
+ * GCC 3,3 and later provide builtins for the FLT, DBL, and LDBL constants.
+ */
+#define FLT_RADIX __FLT_RADIX__
+
+#define FLT_MANT_DIG __FLT_MANT_DIG__
+#define FLT_EPSILON __FLT_EPSILON__
+#define FLT_DIG __FLT_DIG__
+#define FLT_MIN_EXP __FLT_MIN_EXP__
+#define FLT_MIN __FLT_MIN__
+#define FLT_MIN_10_EXP __FLT_MIN_10_EXP__
+#define FLT_MAX_EXP __FLT_MAX_EXP__
+#define FLT_MAX __FLT_MAX__
+#define FLT_MAX_10_EXP __FLT_MAX_10_EXP__
+
+#define DBL_MANT_DIG __DBL_MANT_DIG__
+#define DBL_EPSILON __DBL_EPSILON__
+#define DBL_DIG __DBL_DIG__
+#define DBL_MIN_EXP __DBL_MIN_EXP__
+#define DBL_MIN __DBL_MIN__
+#define DBL_MIN_10_EXP __DBL_MIN_10_EXP__
+#define DBL_MAX_EXP __DBL_MAX_EXP__
+#define DBL_MAX __DBL_MAX__
+#define DBL_MAX_10_EXP __DBL_MAX_10_EXP__
+#else /* GCC < 3.3 */
#define FLT_RADIX 2 /* b */
#define FLT_MANT_DIG 24 /* p */
-#define FLT_EPSILON 1.19209290E-7F /* b**(1-p) */
#define FLT_DIG 6 /* floor((p-1)*log10(b))+(b == 10) */
#define FLT_MIN_EXP (-125) /* emin */
-#define FLT_MIN 1.17549435E-38F /* b**(emin-1) */
#define FLT_MIN_10_EXP (-37) /* ceil(log10(b**(emin-1))) */
#define FLT_MAX_EXP 128 /* emax */
-#define FLT_MAX 3.40282347E+38F /* (1-b**(-p))*b**emax */
#define FLT_MAX_10_EXP 38 /* floor(log10((1-b**(-p))*b**emax)) */
+#if __STDC_VERSION__ >= 199901L
+#define FLT_EPSILON 0x1.0p-23F
+#define FLT_MIN 0x1.0p-126F
+#define FLT_MAX 0x1.fffffep+127F
+#else
+#define FLT_EPSILON 1.19209290E-7F /* b**(1-p) */
+#define FLT_MIN 1.17549435E-38F /* b**(emin-1) */
+#define FLT_MAX 3.40282347E+38F /* (1-b**(-p))*b**emax */
+#endif
#define DBL_MANT_DIG 53
-#define DBL_EPSILON 2.2204460492503131E-16
#define DBL_DIG 15
#define DBL_MIN_EXP (-1021)
-#define DBL_MIN 2.2250738585072014E-308
#define DBL_MIN_10_EXP (-307)
#define DBL_MAX_EXP 1024
-#define DBL_MAX 1.7976931348623157E+308
#define DBL_MAX_10_EXP 308
+#if __STDC_VERSION__ >= 199901L
+#define DBL_EPSILON 0x1.0p-52
+#define DBL_MIN 0x1.0p-1022
+#define DBL_MAX 0x1.fffffffffffffp+1023
+#else
+#define DBL_EPSILON 2.2204460492503131E-16
+#define DBL_MIN 2.2250738585072014E-308
+#define DBL_MAX 1.7976931348623157E+308
+#endif
+#endif /* GCC < 3.3 */
/*
* If no extended-precision type is defined by the machine-dependent
* header including this, default to `long double' being double-precision.
@@ -104,7 +143,11 @@
((_POSIX_C_SOURCE - 0) >= 200112L) || \
((_XOPEN_SOURCE - 0) >= 600) || \
defined(_ISOC99_SOURCE) || defined(_NETBSD_SOURCE)
-#define DECIMAL_DIG 17 /* ceil((1+p*log10(b))-(b==10) */
+#if __GNUC_PREREQ__(3, 3)
+#define DECIMAL_DIG __DECIMAL_DIG__
+#else
+#define DECIMAL_DIG 17 /* ceil((1+p*log10(b))-(b==10) */
+#endif
#endif /* !defined(_ANSI_SOURCE) && ... */
#endif /* LDBL_MANT_DIG */
