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101 lines
2.4 KiB
C
101 lines
2.4 KiB
C
/* Inline math functions for s390.
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Copyright (C) 2004-2014 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef _MATH_H
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# error "Never use <bits/mathinline.h> directly; include <math.h> instead."
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#endif
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#ifndef __extern_inline
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# define __MATH_INLINE __inline
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#else
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# define __MATH_INLINE __extern_inline
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#endif
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#if (!defined __NO_MATH_INLINES || defined __LIBC_INTERNAL_MATH_INLINES) \
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&& defined __OPTIMIZE__
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#ifdef __USE_ISOC99
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/* Test for negative number. Used in the signbit() macro. */
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__MATH_INLINE int
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__NTH (__signbitf (float __x))
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{
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__extension__ union { float __f; int __i; } __u = { __f: __x };
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return __u.__i < 0;
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}
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__MATH_INLINE int
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__NTH (__signbit (double __x))
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{
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__extension__ union { double __d; long __i; } __u = { __d: __x };
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return __u.__i < 0;
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}
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# ifndef __NO_LONG_DOUBLE_MATH
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__MATH_INLINE int
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__NTH (__signbitl (long double __x))
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{
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__extension__ union { long double __l; int __i[4]; } __u = { __l: __x };
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return __u.__i[0] < 0;
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}
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# else
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__MATH_INLINE int
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__NTH (__signbitl (long double __x))
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{
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return __signbit ((double) __x);
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}
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# endif
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#endif /* C99 */
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/* This code is used internally in the GNU libc. */
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#ifdef __LIBC_INTERNAL_MATH_INLINES
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__MATH_INLINE double
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__NTH (__ieee754_sqrt (double x))
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{
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double res;
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asm ( "sqdbr %0,%1" : "=f" (res) : "f" (x) );
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return res;
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}
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__MATH_INLINE float
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__NTH (__ieee754_sqrtf (float x))
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{
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float res;
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asm ( "sqebr %0,%1" : "=f" (res) : "f" (x) );
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return res;
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}
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# if !defined __NO_LONG_DOUBLE_MATH
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__MATH_INLINE long double
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__NTH (sqrtl (long double __x))
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{
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long double res;
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asm ( "sqxbr %0,%1" : "=f" (res) : "f" (__x) );
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return res;
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}
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# endif /* !__NO_LONG_DOUBLE_MATH */
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#endif /* __LIBC_INTERNAL_MATH_INLINES */
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#endif /* __NO_MATH_INLINES */
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