diff options
Diffstat (limited to 'math/math.h')
| -rw-r--r-- | math/math.h | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/math/math.h b/math/math.h index 95b39b3d92..6e4bf9e528 100644 --- a/math/math.h +++ b/math/math.h @@ -97,13 +97,30 @@ typedef _Float128x double_t; # endif #endif -/* Define macros for the return value of ilogb. +/* Define macros for the return value of ilogb, based on + __FP_LOGB0_IS_MIN and __FP_LOGBNAN_IS_MIN. FP_ILOGB0 Expands to a value returned by `ilogb (0.0)'. FP_ILOGBNAN Expands to a value returned by `ilogb (NAN)'. */ +#include <bits/fp-logb.h> +#ifdef __USE_ISOC99 +# if __FP_LOGB0_IS_MIN +# define FP_ILOGB0 (-2147483647 - 1) +# else +# define FP_ILOGB0 (-2147483647) +# endif +# if __FP_LOGBNAN_IS_MIN +# define FP_ILOGBNAN (-2147483647 - 1) +# else +# define FP_ILOGBNAN 2147483647 +# endif +#endif + +/* Get information about long double. */ + #include <bits/mathdef.h> /* Get the architecture specific values describing the floating-point |