diff options
Diffstat (limited to 'math/math.h')
| -rw-r--r-- | math/math.h | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/math/math.h b/math/math.h index 6e4bf9e528..b8f4b415c7 100644 --- a/math/math.h +++ b/math/math.h @@ -97,11 +97,13 @@ typedef _Float128x double_t; # endif #endif -/* Define macros for the return value of ilogb, based on +/* Define macros for the return values of ilogb and llogb, 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)'. + FP_LLOGB0 Expands to a value returned by `llogb (0.0)'. + FP_LLOGBNAN Expands to a value returned by `llogb (NAN)'. */ @@ -118,6 +120,23 @@ typedef _Float128x double_t; # define FP_ILOGBNAN 2147483647 # endif #endif +#if __GLIBC_USE (IEC_60559_BFP_EXT) +# if __WORDSIZE == 32 +# define __FP_LONG_MAX 0x7fffffffL +# else +# define __FP_LONG_MAX 0x7fffffffffffffffL +# endif +# if __FP_LOGB0_IS_MIN +# define FP_LLOGB0 (-__FP_LONG_MAX - 1) +# else +# define FP_LLOGB0 (-__FP_LONG_MAX) +# endif +# if __FP_LOGBNAN_IS_MIN +# define FP_LLOGBNAN (-__FP_LONG_MAX - 1) +# else +# define FP_LLOGBNAN __FP_LONG_MAX +# endif +#endif /* Get information about long double. */ |