From 0b44a0315b47dd8eced9f3b7f31580cf14bbfc01 Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Sat, 12 Feb 2011 00:22:29 -0500 Subject: initial check-in, version 0.5.0 --- src/math/__fpclassify.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) create mode 100644 src/math/__fpclassify.c (limited to 'src/math/__fpclassify.c') diff --git a/src/math/__fpclassify.c b/src/math/__fpclassify.c new file mode 100644 index 00000000..16051100 --- /dev/null +++ b/src/math/__fpclassify.c @@ -0,0 +1,14 @@ +#include +#include + +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; +} -- cgit v1.2.1