From 1fef64b22811709b2e640d341237bce1c8081203 Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Tue, 15 Feb 2005 01:27:10 +0000 Subject: headers for x86_64 --- libc/sysdeps/linux/x86_64/bits/mathinline.h | 53 +++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 libc/sysdeps/linux/x86_64/bits/mathinline.h (limited to 'libc/sysdeps/linux/x86_64/bits/mathinline.h') diff --git a/libc/sysdeps/linux/x86_64/bits/mathinline.h b/libc/sysdeps/linux/x86_64/bits/mathinline.h new file mode 100644 index 000000000..39d11b678 --- /dev/null +++ b/libc/sysdeps/linux/x86_64/bits/mathinline.h @@ -0,0 +1,53 @@ +/* Inline math functions for x86-64. + Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Andreas Jaeger , 2002. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#ifndef _MATH_H +# error "Never use directly; include instead." +#endif + +#ifdef __cplusplus +# define __MATH_INLINE __inline +#else +# define __MATH_INLINE extern __inline +#endif + + +#if defined __USE_ISOC99 && defined __GNUC__ && __GNUC__ >= 2 + +/* Test for negative number. Used in the signbit() macro. */ +__MATH_INLINE int +__NTH (__signbitf (float __x)) +{ + __extension__ union { float __f; int __i; } __u = { __f: __x }; + return __u.__i < 0; +} +__MATH_INLINE int +__NTH (__signbit (double __x)) +{ + __extension__ union { double __d; int __i[2]; } __u = { __d: __x }; + return __u.__i[1] < 0; +} +__MATH_INLINE int +__NTH (__signbitl (long double __x)) +{ + __extension__ union { long double __l; int __i[3]; } __u = { __l: __x }; + return (__u.__i[2] & 0x8000) != 0; +} +#endif -- cgit v1.2.3