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Diffstat (limited to 'sysdeps/libm-ieee754/s_finite.c')
| -rw-r--r-- | sysdeps/libm-ieee754/s_finite.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/sysdeps/libm-ieee754/s_finite.c b/sysdeps/libm-ieee754/s_finite.c new file mode 100644 index 0000000000..c2c428595c --- /dev/null +++ b/sysdeps/libm-ieee754/s_finite.c @@ -0,0 +1,36 @@ +/* @(#)s_finite.c 5.1 93/09/24 */ +/* + * ==================================================== + * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. + * + * Developed at SunPro, a Sun Microsystems, Inc. business. + * Permission to use, copy, modify, and distribute this + * software is freely granted, provided that this notice + * is preserved. + * ==================================================== + */ + +#if defined(LIBM_SCCS) && !defined(lint) +static char rcsid[] = "$NetBSD: s_finite.c,v 1.8 1995/05/10 20:47:17 jtc Exp $"; +#endif + +/* + * finite(x) returns 1 is x is finite, else 0; + * no branching! + */ + +#include "math.h" +#include "math_private.h" + +#ifdef __STDC__ + int __finite(double x) +#else + int __finite(x) + double x; +#endif +{ + int32_t hx; + GET_HIGH_WORD(hx,x); + return (int)((u_int32_t)((hx&0x7fffffff)-0x7ff00000)>>31); +} +weak_alias (__finite, finite) |