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50 lines
1.6 KiB
C
50 lines
1.6 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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/* As QP_HANDLE_EXCEPTIONS reloads FPU control word anyway,
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avoid doing it twice. */
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#define _FP_MUL_MEAT_RESET_FE do {} while (0)
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#include "soft-fp.h"
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#include "quad.h"
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void _Qp_mul(long double *c, 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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FP_INIT_ROUNDMODE;
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FP_UNPACK_QP(A, a);
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FP_UNPACK_QP(B, b);
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FP_MUL_Q(C, A, B);
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FP_PACK_QP(c, C);
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QP_HANDLE_EXCEPTIONS(
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_FPU_SETCW(_fcw);
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__asm (
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" ldd [%1], %%f52\n"
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" ldd [%1+8], %%f54\n"
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" ldd [%2], %%f56\n"
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" ldd [%2+8], %%f58\n"
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" fmulq %%f52, %%f56, %%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), "r" (a), "r" (b) : QP_CLOBBER));
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}
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