| /* RISC-V softfloat definitions |
| Copyright (C) 2017-2018 Free Software Foundation, Inc. |
| |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library 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 |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library. If not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <fenv.h> |
| #include <fpu_control.h> |
| |
| #if __riscv_xlen == 32 |
| |
| # error "rv32i-based targets are not supported" |
| |
| #else |
| |
| # define _FP_W_TYPE_SIZE 64 |
| # define _FP_W_TYPE unsigned long long |
| # define _FP_WS_TYPE signed long long |
| # define _FP_I_TYPE long long |
| |
| # define _FP_MUL_MEAT_S(R, X, Y) \ |
| _FP_MUL_MEAT_1_imm (_FP_WFRACBITS_S, R, X, Y) |
| # define _FP_MUL_MEAT_D(R, X, Y) \ |
| _FP_MUL_MEAT_1_wide (_FP_WFRACBITS_D, R, X, Y, umul_ppmm) |
| # define _FP_MUL_MEAT_Q(R, X, Y) \ |
| _FP_MUL_MEAT_2_wide_3mul (_FP_WFRACBITS_Q, R, X, Y, umul_ppmm) |
| |
| # define _FP_MUL_MEAT_DW_S(R, X, Y) \ |
| _FP_MUL_MEAT_DW_1_imm (_FP_WFRACBITS_S, R, X, Y) |
| # define _FP_MUL_MEAT_DW_D(R, X, Y) \ |
| _FP_MUL_MEAT_DW_1_wide (_FP_WFRACBITS_D, R, X, Y, umul_ppmm) |
| # define _FP_MUL_MEAT_DW_Q(R, X, Y) \ |
| _FP_MUL_MEAT_DW_2_wide_3mul (_FP_WFRACBITS_Q, R, X, Y, umul_ppmm) |
| |
| # define _FP_DIV_MEAT_S(R, X, Y) _FP_DIV_MEAT_1_imm (S, R, X, Y, _FP_DIV_HELP_imm) |
| # define _FP_DIV_MEAT_D(R, X, Y) _FP_DIV_MEAT_1_udiv_norm (D, R, X, Y) |
| # define _FP_DIV_MEAT_Q(R, X, Y) _FP_DIV_MEAT_2_udiv (Q, R, X, Y) |
| |
| # define _FP_NANFRAC_S _FP_QNANBIT_S |
| # define _FP_NANFRAC_D _FP_QNANBIT_D |
| # define _FP_NANFRAC_Q _FP_QNANBIT_Q, 0 |
| |
| #endif |
| |
| #define _FP_NANSIGN_S 0 |
| #define _FP_NANSIGN_D 0 |
| #define _FP_NANSIGN_Q 0 |
| |
| #define _FP_KEEPNANFRACP 0 |
| #define _FP_QNANNEGATEDP 0 |
| |
| #define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \ |
| do { \ |
| R##_s = _FP_NANSIGN_##fs; \ |
| _FP_FRAC_SET_##wc (R, _FP_NANFRAC_##fs); \ |
| R##_c = FP_CLS_NAN; \ |
| } while (0) |
| |
| #define _FP_DECL_EX int _frm __attribute__ ((unused)); |
| #define FP_ROUNDMODE _frm |
| |
| #define FP_RND_NEAREST FE_TONEAREST |
| #define FP_RND_ZERO FE_TOWARDZERO |
| #define FP_RND_PINF FE_UPWARD |
| #define FP_RND_MINF FE_DOWNWARD |
| |
| #define FP_EX_INVALID FE_INVALID |
| #define FP_EX_OVERFLOW FE_OVERFLOW |
| #define FP_EX_UNDERFLOW FE_UNDERFLOW |
| #define FP_EX_DIVZERO FE_DIVBYZERO |
| #define FP_EX_INEXACT FE_INEXACT |
| |
| #define _FP_TININESS_AFTER_ROUNDING 1 |
| |
| #ifdef __riscv_flen |
| # define FP_INIT_ROUNDMODE \ |
| do { \ |
| __asm__ volatile ("frrm %0" : "=r" (_frm)); \ |
| } while (0) |
| |
| # define FP_HANDLE_EXCEPTIONS \ |
| do { \ |
| if (__builtin_expect (_fex, 0)) \ |
| __asm__ volatile ("csrs fflags, %0" : : "rK" (_fex)); \ |
| } while (0) |
| #else |
| # define FP_INIT_ROUNDMODE _frm = FP_RND_NEAREST |
| #endif |