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/* Software floating-point emulation.
Convert a _BitInt to IEEE quad.
Copyright (C) 2023 Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#include "soft-fp.h"
#include "quad.h"
#include "bitint.h"
#ifdef __BITINT_MAXWIDTH__
#ifndef TI_BITS
/* As mantissa is 112 bits + 1 implicit bit, we need 128-bit
type, but on most 32-bit architectures TImode isn't supported.
Use _BitInt(128) instead. */
typedef _BitInt(128) TItype;
typedef unsigned _BitInt(128) UTItype;
#define TI_BITS 128
#endif
TFtype
__floatbitinttf (const UBILtype *i, SItype iprec)
{
TItype iv;
USItype shift = 0;
FP_DECL_EX;
FP_DECL_Q (A);
TFtype a;
FP_FROM_BITINT (i, iprec, iv, shift, TI);
FP_INIT_ROUNDMODE;
FP_FROM_INT_Q (A, iv, TI_BITS, UTItype);
if (shift)
{
A_e += shift;
if (A_e >= _FP_EXPMAX_Q)
{
/* Exponent too big; overflow to infinity. */
#if _FP_W_TYPE_SIZE < 64
_FP_OVERFLOW_SEMIRAW (Q, 4, A);
_FP_PACK_SEMIRAW (Q, 4, A);
#else
_FP_OVERFLOW_SEMIRAW (Q, 2, A);
_FP_PACK_SEMIRAW (Q, 2, A);
#endif
}
}
FP_PACK_RAW_Q (a, A);
FP_HANDLE_EXCEPTIONS;
return a;
}
#endif
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