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f943ba61ae
'lib' is also being used by the cmake build, so there was a theoretical risk for file conflicts. The new name is 'borrowed'.
59 lines
2.4 KiB
C
59 lines
2.4 KiB
C
/********************************************************************\
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* pow.h -- pow wrapper for MinGW systems *
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* Copyright (C) 2007 Andreas Koehler <andi5.py@gmx.net> *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU General Public License as *
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* published by the Free Software Foundation; either version 2 of *
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* the License, or (at your option) any later version. *
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* *
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* This program 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 *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License*
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* along with this program; if not, contact: *
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* *
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* Free Software Foundation Voice: +1-617-542-5942 *
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* 51 Franklin Street, Fifth Floor Fax: +1-617-542-2652 *
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* Boston, MA 02110-1301, USA gnu@gnu.org *
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\********************************************************************/
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#ifndef __POW_H__
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#define __POW_H__
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#include <math.h>
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/* From MinGW, math.h: */
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/* Excess precision when using a 64-bit mantissa for FPU math ops can
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* cause unexpected results with some of the MSVCRT math functions.
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* For example, unless the function return value is stored (truncating
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* to 53-bit mantissa), calls to pow with both x and y as integral
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* values sometimes produce a non-integral result. */
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#define __DEFINE_FLOAT_STORE_MATHFN_D1(fn1) \
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static __inline__ double \
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__float_store_ ## fn1 (double x) \
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{ \
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__volatile__ double res = (fn1) (x); \
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return res; \
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}
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#define __DEFINE_FLOAT_STORE_MATHFN_D2(fn2) \
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static __inline__ double \
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__float_store_ ## fn2 (double x, double y) \
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{ \
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__volatile__ double res = (fn2) (x, y); \
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return res; \
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}
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#undef pow
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/* Define the ___float_store_pow function and use it instead of pow(). */
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__DEFINE_FLOAT_STORE_MATHFN_D2 (pow)
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#define pow __float_store_pow
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#endif /* __POW_H__ */
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