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46 lines
1.4 KiB
C
46 lines
1.4 KiB
C
/* Software floating-point emulation.
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(*c) = (long double)(a)
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Copyright (C) 1997-2017 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 "double.h"
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#include "quad.h"
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void _Qp_dtoq(long double *c, const double a)
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{
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FP_DECL_EX;
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FP_DECL_D(A);
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FP_DECL_Q(C);
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FP_INIT_ROUNDMODE;
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FP_UNPACK_RAW_D(A, a);
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#if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q
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FP_EXTEND(Q,D,4,2,C,A);
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#else
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FP_EXTEND(Q,D,2,1,C,A);
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#endif
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FP_PACK_RAW_QP(c, C);
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QP_HANDLE_EXCEPTIONS(__asm (
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" fdtoq %1, %%f60\n"
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" std %%f60, [%0]\n"
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" std %%f62, [%0+8]\n"
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" " : : "r" (c), "e" (a) : QP_CLOBBER));
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}
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