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39 lines
1.3 KiB
C
39 lines
1.3 KiB
C
/* Software floating-point emulation.
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c = a - b
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Copyright (C) 1997-2013 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 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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#include "soft-fp.h"
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#include "quad.h"
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long double _Q_sub(const long double a, const long double b)
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{
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FP_DECL_EX;
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FP_DECL_Q(A); FP_DECL_Q(B); FP_DECL_Q(C);
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long double c;
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FP_INIT_ROUNDMODE;
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FP_UNPACK_SEMIRAW_Q(A, a);
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FP_UNPACK_SEMIRAW_Q(B, b);
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FP_SUB_Q(C, A, B);
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FP_PACK_SEMIRAW_Q(c, C);
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FP_HANDLE_EXCEPTIONS;
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return c;
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}
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