| /* 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 |