diff options
Diffstat (limited to 'math/math.h')
| -rw-r--r-- | math/math.h | 27 |
1 files changed, 25 insertions, 2 deletions
diff --git a/math/math.h b/math/math.h index ce4f4867fa..bf3ef9bcee 100644 --- a/math/math.h +++ b/math/math.h @@ -115,6 +115,25 @@ extern int signgam; /* ISO C 9X defines some generic macros which work on any data type. */ #if __USE_ISOC9X +/* Get the architecture specific values describing the floating-point + evaluation. The following symbols will get defined: + + float_t floating-point type at least as wide as `float' used + to evaluate `float' expressions + double_t floating-point type at least as wide as `double' used + to evaluate `double' expressions + + FLT_EVAL_METHOD + Defined to + 0 if `float_t' is `float' and `double_t' is `double' + 1 if `float_t' and `double_t' are `double' + 2 if `float_t' and `double_t' are `long double' + else `float_t' and `double_t' are unspecified + + INFINITY representation of the infinity value of type `float_t' +*/ +#include <mathbits.h> + /* All floating-point numbers can be put in one of these categories. */ enum { @@ -133,7 +152,7 @@ enum /* Return number of classification appropriate for X. */ #define fpclassify(x) \ (sizeof (x) == sizeof (float) ? \ - __fpclassifyf (x) \ + __fpclassifyf (x) \ : sizeof (x) == sizeof (double) ? \ __fpclassify (x) : __fpclassifyl (x)) @@ -145,7 +164,11 @@ enum __signbit (x) : __signbitl (x)) /* Return nonzero value if X is not +-Inf or NaN. */ -#define isfinite(x) (fpclassify (x) >= FP_ZERO) +#define isfinite(x) \ + (sizeof (x) == sizeof (float) ? \ + __finitef (x) \ + : sizeof (x) == sizeof (double) ? \ + __finite (x) : __finitel (x)) /* Return nonzero value if X is neither zero, subnormal, Inf, nor NaN. */ #define isnormal(x) (fpclassify (x) == FP_NORMAL) |