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| author | Ulrich Drepper <drepper@gmail.com> | 2011-10-08 10:18:26 -0400 |
|---|---|---|
| committer | Ulrich Drepper <drepper@gmail.com> | 2011-10-08 10:18:26 -0400 |
| commit | 7edb55ce06ab1fa716a062cd1cb6682585bb449d (patch) | |
| tree | 3fed82e7c3f86ac57f3e9d6f314044b7dbdb8d03 /sysdeps/ieee754/flt-32 | |
| parent | 187da0aedcd9d0a2fb34477bef41549681ba1273 (diff) | |
| download | glibc-7edb55ce06ab1fa716a062cd1cb6682585bb449d.tar.gz glibc-7edb55ce06ab1fa716a062cd1cb6682585bb449d.tar.xz glibc-7edb55ce06ab1fa716a062cd1cb6682585bb449d.zip | |
Optimize use of isnan, isinf, finite
Diffstat (limited to 'sysdeps/ieee754/flt-32')
| -rw-r--r-- | sysdeps/ieee754/flt-32/s_finitef.c | 1 | ||||
| -rw-r--r-- | sysdeps/ieee754/flt-32/s_isinf_nsf.c | 20 | ||||
| -rw-r--r-- | sysdeps/ieee754/flt-32/s_isnanf.c | 3 |
3 files changed, 23 insertions, 1 deletions
diff --git a/sysdeps/ieee754/flt-32/s_finitef.c b/sysdeps/ieee754/flt-32/s_finitef.c index 65767f8f93..2df513be75 100644 --- a/sysdeps/ieee754/flt-32/s_finitef.c +++ b/sysdeps/ieee754/flt-32/s_finitef.c @@ -25,6 +25,7 @@ static char rcsid[] = "$NetBSD: s_finitef.c,v 1.4 1995/05/10 20:47:18 jtc Exp $" #include "math.h" #include "math_private.h" +#undef __finitef #ifdef __STDC__ int __finitef(float x) #else diff --git a/sysdeps/ieee754/flt-32/s_isinf_nsf.c b/sysdeps/ieee754/flt-32/s_isinf_nsf.c new file mode 100644 index 0000000000..bc37785168 --- /dev/null +++ b/sysdeps/ieee754/flt-32/s_isinf_nsf.c @@ -0,0 +1,20 @@ +/* + * Written by Ulrich Drepper <drepper@gmail.com>. + */ + +/* + * __isinf_nsf(x) returns != 0 if x is ±inf, else 0; + * no branching! + */ + +#include "math.h" +#include "math_private.h" + +#undef __isinf_nsf +int +__isinf_nsf (float x) +{ + int32_t ix,t; + GET_FLOAT_WORD(ix,x); + return (ix & 0x7fffffff) == 0x7f800000; +} diff --git a/sysdeps/ieee754/flt-32/s_isnanf.c b/sysdeps/ieee754/flt-32/s_isnanf.c index 4ac16c2b5f..1b1b2475b9 100644 --- a/sysdeps/ieee754/flt-32/s_isnanf.c +++ b/sysdeps/ieee754/flt-32/s_isnanf.c @@ -4,7 +4,7 @@ /* * ==================================================== - * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. + * Copyright (C) 1993, 2011 by Sun Microsystems, Inc. All rights reserved. * * Developed at SunPro, a Sun Microsystems, Inc. business. * Permission to use, copy, modify, and distribute this @@ -25,6 +25,7 @@ static char rcsid[] = "$NetBSD: s_isnanf.c,v 1.4 1995/05/10 20:47:38 jtc Exp $"; #include "math.h" #include "math_private.h" +#undef __isnanf #ifdef __STDC__ int __isnanf(float x) #else |