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55 lines
1.3 KiB
C
55 lines
1.3 KiB
C
/* Copyright (C) 1991, 1992, 1995 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., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#include <precomp.h>
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#if defined(_MSC_VER) && defined(_M_ARM)
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#pragma function(_isnan)
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#endif /* _MSC_VER */
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/*
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* @implemented
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*/
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int CDECL _isnan(double __x)
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{
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union
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{
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double* __x;
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double_s* x;
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} x;
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x.__x = &__x;
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return ( x.x->exponent == 0x7ff && ( x.x->mantissah != 0 || x.x->mantissal != 0 ));
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}
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/*
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* @implemented
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*/
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int CDECL _finite(double __x)
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{
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union
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{
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double* __x;
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double_s* x;
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} x;
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x.__x = &__x;
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return ((x.x->exponent & 0x7ff) != 0x7ff);
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}
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