diff options
| -rw-r--r-- | libm/fpmacros.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/libm/fpmacros.c b/libm/fpmacros.c index 6c5abbe87..a9f63df4b 100644 --- a/libm/fpmacros.c +++ b/libm/fpmacros.c @@ -165,6 +165,30 @@ long int __isfinite ( double x ) } +/*********************************************************************** +* long int __isinff(float x) returns -1 if value represents negative +* infinity, 1 if value represents positive infinity, +* and 0 otherwise. +* +* Calls: __signbit +* +***********************************************************************/ +long int __isinff ( float x ) +{ + long int class = __fpclassifyf(x); + if ( class == FP_INFINITE ) { + return ( (__signbitf(x)) ? -1 : 1); + } + return 0; +} + +long int __isinf ( double x ) +{ + long int class = __fpclassify(x); + if ( class == FP_INFINITE ) { + return ( (__signbit(x)) ? -1 : 1); + } + return 0; +} /*********************************************************************** long int __isnanf(float x) returns nonzero if and only if x is a |