/* Declarations for math functions.
- Copyright (C) 1991, 92, 93, 95, 96, 97 Free Software Foundation, Inc.
+ Copyright (C) 1991, 92, 93, 95, 96, 97, 98 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
#include <bits/huge_val.h>
/* Get machine-dependent NAN value (returned for some domain errors). */
-#ifdef __USE_GNU
+#ifdef __USE_ISOC9X
# include <bits/nan.h>
#endif
FP_FAST_FMA
FP_FAST_FMAF
FP_FAST_FMAL
- If defined it indicates that the the `fma' function
+ If defined it indicates that the `fma' function
generally executes about as fast as a multiply and an add.
This macro is defined only iff the `fma' function is
implemented directly with a hardware multiply-add instructions.
#ifdef __USE_MISC
/* Support for various different standard error handling behaviors. */
-
-typedef enum { _IEEE_ = -1, _SVID_, _XOPEN_, _POSIX_ } _LIB_VERSION_TYPE;
+typedef enum
+{
+ _IEEE_ = -1, /* According to IEEE 754/IEEE 854. */
+ _SVID_, /* According to System V, release 4. */
+ _XOPEN_, /* Nowadays also Unix98. */
+ _POSIX_,
+ _ISOC_ /* Actually this is ISO C 9X. */
+} _LIB_VERSION_TYPE;
/* This variable can be changed at run-time to any of the values above to
affect floating point error handling behavior (it may also be necessary
#endif /* SVID */
-#if defined __USE_BSD || defined __USE_UNIX98
-
/* Some useful constants. */
-# define M_E _Mldbl(2.7182818284590452354) /* e */
-# define M_LOG2E _Mldbl(1.4426950408889634074) /* log_2 e */
-# define M_LOG10E _Mldbl(0.43429448190325182765) /* log_10 e */
-# define M_LN2 _Mldbl(0.69314718055994530942) /* log_e 2 */
-# define M_LN10 _Mldbl(2.30258509299404568402) /* log_e 10 */
-# define M_PI _Mldbl(3.14159265358979323846) /* pi */
-# define M_PI_2 _Mldbl(1.57079632679489661923) /* pi/2 */
-# define M_PI_4 _Mldbl(0.78539816339744830962) /* pi/4 */
-# define M_1_PI _Mldbl(0.31830988618379067154) /* 1/pi */
-# define M_2_PI _Mldbl(0.63661977236758134308) /* 2/pi */
-# define M_2_SQRTPI _Mldbl(1.12837916709551257390) /* 2/sqrt(pi) */
-# define M_SQRT2 _Mldbl(1.41421356237309504880) /* sqrt(2) */
-# define M_SQRT1_2 _Mldbl(0.70710678118654752440) /* 1/sqrt(2) */
-
+#if defined __USE_BSD || defined __USE_UNIX98
+# define M_E 2.7182818284590452354 /* e */
+# define M_LOG2E 1.4426950408889634074 /* log_2 e */
+# define M_LOG10E 0.43429448190325182765 /* log_10 e */
+# define M_LN2 0.69314718055994530942 /* log_e 2 */
+# define M_LN10 2.30258509299404568402 /* log_e 10 */
+# define M_PI 3.14159265358979323846 /* pi */
+# define M_PI_2 1.57079632679489661923 /* pi/2 */
+# define M_PI_4 0.78539816339744830962 /* pi/4 */
+# define M_1_PI 0.31830988618379067154 /* 1/pi */
+# define M_2_PI 0.63661977236758134308 /* 2/pi */
+# define M_2_SQRTPI 1.12837916709551257390 /* 2/sqrt(pi) */
+# define M_SQRT2 1.41421356237309504880 /* sqrt(2) */
+# define M_SQRT1_2 0.70710678118654752440 /* 1/sqrt(2) */
#endif
-/* Our constants might specify more precision than `double' can represent.
- Use `long double' constants in standard and GNU C, where they are
- supported and the cast to `double'.
-
- If the constants are use in code which does not use prototypes, one
- might get problems if a function takes a `double' argument and any
- of the constants are provided as the argument. In this case, cast
- the argument to `double'.
-
- Please note we define the macro even if the constants are not defined.
- This helps us to use the macros in other places. */
-#if (__STDC__ - 0 || __GNUC__ - 0) && defined __USE_GNU
-# define _Mldbl(x) x##L
-#else /* Traditional C. */
-# define _Mldbl(x) x
-#endif /* Standard or GNU C. */
+/* The above constants are not adequate for computation using `long double's.
+ Therefore we provide as an extension constants with similar names as a
+ GNU extension. Provide enough digits for the 128-bit IEEE quad. */
+#ifdef __USE_GNU
+# define M_El 2.7182818284590452353602874713526625L /* e */
+# define M_LOG2El 1.4426950408889634073599246810018922L /* log_2 e */
+# define M_LOG10El 0.4342944819032518276511289189166051L /* log_10 e */
+# define M_LN2l 0.6931471805599453094172321214581766L /* log_e 2 */
+# define M_LN10l 2.3025850929940456840179914546843642L /* log_e 10 */
+# define M_PIl 3.1415926535897932384626433832795029L /* pi */
+# define M_PI_2l 1.5707963267948966192313216916397514L /* pi/2 */
+# define M_PI_4l 0.7853981633974483096156608458198757L /* pi/4 */
+# define M_1_PIl 0.3183098861837906715377675267450287L /* 1/pi */
+# define M_2_PIl 0.6366197723675813430755350534900574L /* 2/pi */
+# define M_2_SQRTPIl 1.1283791670955125738961589031215452L /* 2/sqrt(pi) */
+# define M_SQRT2l 1.4142135623730950488016887242096981L /* sqrt(2) */
+# define M_SQRT1_2l 0.7071067811865475244008443621048490L /* 1/sqrt(2) */
+#endif
/* Get machine-dependent inline versions (if there are any). */
/* Return nonzero value if arguments are unordered. */
# ifndef isunordered
-# define isunordered(x, y) \
+# define isunordered(u, v) \
(__extension__ \
- ({ __typeof__(x) __x = (x); __typeof__(y) __y = (y); \
- fpclassify (__x) == FP_NAN || fpclassify (__y) == FP_NAN; }))
+ ({ __typeof__(u) __u = (u); __typeof__(v) __v = (v); \
+ fpclassify (__u) == FP_NAN || fpclassify (__v) == FP_NAN; }))
# endif
#endif
projects / kopensolaris-gnu / glibc.git / blobdiff