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50 lines
1.4 KiB
C
50 lines
1.4 KiB
C
/* Software floating-point emulation.
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Return (float)(*a)
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Copyright (C) 1997-2020 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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<https://www.gnu.org/licenses/>. */
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#include "soft-fp.h"
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#include "single.h"
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#include "quad.h"
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float _Qp_qtos(const long double *a)
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{
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FP_DECL_EX;
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FP_DECL_Q(A);
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FP_DECL_S(R);
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float r;
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FP_INIT_ROUNDMODE;
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FP_UNPACK_SEMIRAW_QP(A, a);
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#if _FP_W_TYPE_SIZE < 64
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FP_TRUNC(S,Q,1,4,R,A);
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#else
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FP_TRUNC(S,Q,1,2,R,A);
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#endif
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FP_PACK_SEMIRAW_S(r, R);
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QP_HANDLE_EXCEPTIONS(__asm (
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" ldd [%1], %%f52\n"
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" ldd [%1+8], %%f54\n"
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" fqtos %%f52, %0\n"
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" " : "=&f" (r) : "r" (a) : QP_CLOBBER));
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return r;
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}
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