60 lines
1.6 KiB
C
60 lines
1.6 KiB
C
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/* Software floating-point emulation.
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Convert a _BitInt to IEEE single.
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Copyright (C) 2023 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. 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 "single.h"
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#include "bitint.h"
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#ifdef __BITINT_MAXWIDTH__
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SFtype
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__floatbitintsf (const UBILtype *i, SItype iprec)
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{
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SItype iv;
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USItype shift = 0;
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FP_DECL_EX;
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FP_DECL_S (A);
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SFtype a;
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FP_FROM_BITINT (i, iprec, iv, shift, SI);
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FP_INIT_ROUNDMODE;
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FP_FROM_INT_S (A, iv, SI_BITS, USItype);
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if (shift)
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{
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A_e += shift;
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if (A_e >= _FP_EXPMAX_S)
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{
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/* Exponent too big; overflow to infinity. */
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_FP_OVERFLOW_SEMIRAW (S, 1, A);
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_FP_PACK_SEMIRAW (S, 1, A);
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}
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}
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FP_PACK_RAW_S (a, A);
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FP_HANDLE_EXCEPTIONS;
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return a;
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}
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#endif
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