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78 lines
2.0 KiB
C
78 lines
2.0 KiB
C
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/* Inline math functions for s390.
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Copyright (C) 2004 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, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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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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#ifdef __cplusplus
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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 __signbitf (float __x) __THROW
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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 __signbit (double __x) __THROW
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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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#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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#include <sysdep.h>
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#include <ldsodefs.h>
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#include <dl-procinfo.h>
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__MATH_INLINE double
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__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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__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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#endif /* __LIBC_INTERNAL_MATH_INLINES */
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#endif /* __NO_MATH_INLINES */
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