diff options
| author | Bernhard Reutner-Fischer <rep.dot.nop@gmail.com> | 2008-09-25 17:43:58 +0000 |
|---|---|---|
| committer | Bernhard Reutner-Fischer <rep.dot.nop@gmail.com> | 2008-09-25 17:43:58 +0000 |
| commit | 0e05d9826e6d32a27392ed9d6fe613ef6cf957a0 (patch) | |
| tree | 6e88884bf2f757103209ad4d97d61f37db5cc1d7 /libm/s_isinff.c | |
| parent | cf7b82ed31eaa526c74f8b1af6f0cfec315f1d69 (diff) | |
- remove files that are not either LGPL or Public Domain.
- pull replacement funcs for fpmacros.c from glibc
This removes the powerpc/classic implementation which did not state any
license but read:
Copyright © 1991 Apple Computer, Inc. All rights reserved.
and thus was dubious (and not needed).
Diffstat (limited to 'libm/s_isinff.c')
| -rw-r--r-- | libm/s_isinff.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/libm/s_isinff.c b/libm/s_isinff.c new file mode 100644 index 000000000..33e274947 --- /dev/null +++ b/libm/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 if x is inf, -1 if x is -inf, else 0; + * no branching! + */ + +#include "math.h" +#include "math_private.h" + +libm_hidden_proto(__isinff) +int +__isinff (float x) +{ + int32_t ix,t; + GET_FLOAT_WORD(ix,x); + t = ix & 0x7fffffff; + t ^= 0x7f800000; + t |= -t; + return ~(t >> 31) & (ix >> 30); +} +libm_hidden_def (__isinff) +weak_alias (__isinff, isinff) |