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d876f53279
1999-12-29 Ulrich Drepper <drepper@cygnus.com> * soft-fp/*: Tons of new files to implement floating-point arithmetic in software. Contributed by Richard Henderson, Jakub Jelinek and others.
48 lines
1.6 KiB
C
48 lines
1.6 KiB
C
/* Software floating-point emulation.
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Return !a
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Copyright (C) 1997,1999 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Richard Henderson (rth@cygnus.com) and
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Jakub Jelinek (jj@ultra.linux.cz).
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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 Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc.,
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59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "soft-fp.h"
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#include "quad.h"
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long double _Q_neg(const long double a)
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{
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FP_DECL_EX;
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long double c = a;
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#if (__BYTE_ORDER == __BIG_ENDIAN)
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((UWtype *)&c)[0] ^= (((UWtype)1) << (W_TYPE_SIZE - 1));
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#elif (__BYTE_ORDER == __LITTLE_ENDIAN) && (W_TYPE_SIZE == 64)
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((UWtype *)&c)[1] ^= (((UWtype)1) << (W_TYPE_SIZE - 1));
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#elif (__BYTE_ORDER == __LITTLE_ENDIAN) && (W_TYPE_SIZE == 32)
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((UWtype *)&c)[3] ^= (((UWtype)1) << (W_TYPE_SIZE - 1));
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#else
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FP_DECL_Q(A); FP_DECL_Q(C);
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FP_UNPACK_Q(A, a);
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FP_NEG_Q(C, A);
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FP_PACK_Q(c, C);
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#endif
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FP_CLEAR_EXCEPTIONS;
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FP_HANDLE_EXCEPTIONS;
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return c;
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}
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