diff options
Diffstat (limited to 'math/math.h')
| -rw-r--r-- | math/math.h | 37 |
1 files changed, 24 insertions, 13 deletions
diff --git a/math/math.h b/math/math.h index 7a6134a6f0..fbec2e89ae 100644 --- a/math/math.h +++ b/math/math.h @@ -127,20 +127,31 @@ extern int matherr __P ((struct exception *)); #ifdef __USE_BSD + /* Some useful constants. */ -#define M_E 2.7182818284590452354 /* e */ -#define M_LOG2E 1.4426950408889634074 /* log 2e */ -#define M_LOG10E 0.43429448190325182765 /* log 10e */ -#define M_LN2 0.69314718055994530942 /* log e2 */ -#define M_LN10 2.30258509299404568402 /* log e10 */ -#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) */ +#define M_E _Mldbl(2.7182818284590452354) /* e */ +#define M_LOG2E _Mldbl(1.4426950408889634074) /* log 2e */ +#define M_LOG10E _Mldbl(0.43429448190325182765) /* log 10e */ +#define M_LN2 _Mldbl(0.69314718055994530942) /* log e2 */ +#define M_LN10 _Mldbl(2.30258509299404568402) /* log e10 */ +#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) */ + +/* 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 __STDC__ - 0 || __GNUC__ - 0 +#define _Mldbl(x) x##L +#else /* Traditional C. */ +#define _Mldbl(x) x +#endif /* Standard or GNU C. */ + #endif |