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| author | Rich Felker <dalias@aerifal.cx> | 2011-02-12 00:22:29 -0500 |
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| committer | Rich Felker <dalias@aerifal.cx> | 2011-02-12 00:22:29 -0500 |
| commit | 0b44a0315b47dd8eced9f3b7f31580cf14bbfc01 (patch) | |
| tree | 6eaef0d8a720fa3da580de87b647fff796fe80b3 /src/math/__fpclassifyl.c | |
| download | musl-0b44a0315b47dd8eced9f3b7f31580cf14bbfc01.tar.gz musl-0b44a0315b47dd8eced9f3b7f31580cf14bbfc01.tar.bz2 musl-0b44a0315b47dd8eced9f3b7f31580cf14bbfc01.tar.xz musl-0b44a0315b47dd8eced9f3b7f31580cf14bbfc01.zip | |
initial check-in, version 0.5.0v0.5.0
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; +} |