diff options
author | pommicket <pommicket@gmail.com> | 2022-02-20 13:18:21 -0800 |
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committer | pommicket <pommicket@gmail.com> | 2022-02-20 13:18:21 -0800 |
commit | 9bc8a11afeed3569736b89754012e3ca22ee10f6 (patch) | |
tree | 5f0ec0d5c05f879b1ee86adfa654ed3ef2178d5f /05/musl-0.6.0/src/math/__fpclassify.c | |
parent | 0f97a589b800bdb71dda05984192f0f66a52edaa (diff) |
conclusion
Diffstat (limited to '05/musl-0.6.0/src/math/__fpclassify.c')
-rw-r--r-- | 05/musl-0.6.0/src/math/__fpclassify.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/05/musl-0.6.0/src/math/__fpclassify.c b/05/musl-0.6.0/src/math/__fpclassify.c new file mode 100644 index 0000000..1605110 --- /dev/null +++ b/05/musl-0.6.0/src/math/__fpclassify.c @@ -0,0 +1,14 @@ +#include <stdint.h> +#include <math.h> + +int __fpclassify(double __x) +{ + union { + double __d; + __uint64_t __i; + } __y = { __x }; + int __ee = __y.__i>>52 & 0x7ff; + if (!__ee) return __y.__i<<1 ? FP_SUBNORMAL : FP_ZERO; + if (__ee==0x7ff) return __y.__i<<12 ? FP_NAN : FP_INFINITE; + return FP_NORMAL; +} |