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| author |   deraadt <deraadt@openbsd.org> | 1995-10-18 08:37:01 +0000 |
|---|---|---|
| committer | deraadt <deraadt@openbsd.org> | 1995-10-18 08:37:01 +0000 |
| commit | df930be708d50e9715f173caa26ffe1b7599b157 (patch) | |
| tree | aa317e49e28cb999c9cf3db7f00c20903fe6010a /lib/libm/src/s_isinff.c | |
| download | wireguard-openbsd-df930be708d50e9715f173caa26ffe1b7599b157.tar.xz wireguard-openbsd-df930be708d50e9715f173caa26ffe1b7599b157.zip | |
initial import of NetBSD tree
Diffstat (limited to 'lib/libm/src/s_isinff.c')
| -rw-r--r-- | lib/libm/src/s_isinff.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/lib/libm/src/s_isinff.c b/lib/libm/src/s_isinff.c new file mode 100644 index 00000000000..4ff94269740 --- /dev/null +++ b/lib/libm/src/s_isinff.c @@ -0,0 +1,30 @@ +/* + * Written by J.T. Conklin <jtc@netbsd.org>. + * Public domain. + */ + +#if defined(LIBM_SCCS) && !defined(lint) +static char rcsid[] = "$NetBSD: s_isinff.c,v 1.3 1995/05/11 23:20:21 jtc Exp $"; +#endif + +/* + * isinff(x) returns 1 is x is inf, else 0; + * no branching! + */ + +#include "math.h" +#include "math_private.h" + +#ifdef __STDC__ + int isinff(float x) +#else + int isinff(x) + float x; +#endif +{ + int32_t ix; + GET_FLOAT_WORD(ix,x); + ix &= 0x7fffffff; + ix ^= 0x7f800000; + return (ix == 0); +} |