diff options
Diffstat (limited to 'src/math/__fpclassifyl.c')
-rw-r--r-- | src/math/__fpclassifyl.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/math/__fpclassifyl.c b/src/math/__fpclassifyl.c new file mode 100644 index 00000000..4f93bef1 --- /dev/null +++ b/src/math/__fpclassifyl.c @@ -0,0 +1,16 @@ +#include <stdint.h> +#include <math.h> + +/* FIXME: move this to arch-specific file */ +int __fpclassifyl(long double __x) +{ + union { + long double __ld; + __uint16_t __hw[5]; + __uint64_t __m; + } __y = { __x }; + int __ee = __y.__hw[4]&0x7fff; + if (!__ee) return __y.__m ? FP_SUBNORMAL : FP_ZERO; + if (__ee==0x7fff) return __y.__m ? FP_NAN : FP_INFINITE; + return FP_NORMAL; +} |