projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 67236aeb | 1 | /* RISC-V softfloat definitions |
| d614a753 | 2 | Copyright (C) 2017-2020 Free Software Foundation, Inc. |
| 67236aeb PD |
3 | |
| 4 | This file is part of the GNU C Library. | |
| 5 | ||
| 6 | The GNU C Library is free software; you can redistribute it and/or | |
| 7 | modify it under the terms of the GNU Lesser General Public | |
| 8 | License as published by the Free Software Foundation; either | |
| 9 | version 2.1 of the License, or (at your option) any later version. | |
| 10 | ||
| 11 | The GNU C Library is distributed in the hope that it will be useful, | |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 14 | Lesser General Public License for more details. | |
| 15 | ||
| 16 | You should have received a copy of the GNU Lesser General Public | |
| 17 | License along with the GNU C Library. If not, see | |
| 5a82c748 | 18 | <https://www.gnu.org/licenses/>. */ |
| 67236aeb PD |
19 | |
| 20 | #include <fenv.h> | |
| 21 | #include <fpu_control.h> | |
| 22 | ||
| 23 | #if __riscv_xlen == 32 | |
| 24 | ||
| 25 | # error "rv32i-based targets are not supported" | |
| 26 | ||
| 27 | #else | |
| 28 | ||
| 29 | # define _FP_W_TYPE_SIZE 64 | |
| 30 | # define _FP_W_TYPE unsigned long long | |
| 31 | # define _FP_WS_TYPE signed long long | |
| 32 | # define _FP_I_TYPE long long | |
| 33 | ||
| 34 | # define _FP_MUL_MEAT_S(R, X, Y) \ | |
| 35 | _FP_MUL_MEAT_1_imm (_FP_WFRACBITS_S, R, X, Y) | |
| 36 | # define _FP_MUL_MEAT_D(R, X, Y) \ | |
| 37 | _FP_MUL_MEAT_1_wide (_FP_WFRACBITS_D, R, X, Y, umul_ppmm) | |
| 38 | # define _FP_MUL_MEAT_Q(R, X, Y) \ | |
| 39 | _FP_MUL_MEAT_2_wide_3mul (_FP_WFRACBITS_Q, R, X, Y, umul_ppmm) | |
| 40 | ||
| 41 | # define _FP_MUL_MEAT_DW_S(R, X, Y) \ | |
| 42 | _FP_MUL_MEAT_DW_1_imm (_FP_WFRACBITS_S, R, X, Y) | |
| 43 | # define _FP_MUL_MEAT_DW_D(R, X, Y) \ | |
| 44 | _FP_MUL_MEAT_DW_1_wide (_FP_WFRACBITS_D, R, X, Y, umul_ppmm) | |
| 45 | # define _FP_MUL_MEAT_DW_Q(R, X, Y) \ | |
| 46 | _FP_MUL_MEAT_DW_2_wide_3mul (_FP_WFRACBITS_Q, R, X, Y, umul_ppmm) | |
| 47 | ||
| 48 | # define _FP_DIV_MEAT_S(R, X, Y) _FP_DIV_MEAT_1_imm (S, R, X, Y, _FP_DIV_HELP_imm) | |
| 49 | # define _FP_DIV_MEAT_D(R, X, Y) _FP_DIV_MEAT_1_udiv_norm (D, R, X, Y) | |
| 50 | # define _FP_DIV_MEAT_Q(R, X, Y) _FP_DIV_MEAT_2_udiv (Q, R, X, Y) | |
| 51 | ||
| 52 | # define _FP_NANFRAC_S _FP_QNANBIT_S | |
| 53 | # define _FP_NANFRAC_D _FP_QNANBIT_D | |
| 54 | # define _FP_NANFRAC_Q _FP_QNANBIT_Q, 0 | |
| 55 | ||
| 56 | #endif | |
| 57 | ||
| 58 | #define _FP_NANSIGN_S 0 | |
| 59 | #define _FP_NANSIGN_D 0 | |
| 60 | #define _FP_NANSIGN_Q 0 | |
| 61 | ||
| 62 | #define _FP_KEEPNANFRACP 0 | |
| 63 | #define _FP_QNANNEGATEDP 0 | |
| 64 | ||
| 65 | #define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \ | |
| 66 | do { \ | |
| 67 | R##_s = _FP_NANSIGN_##fs; \ | |
| 68 | _FP_FRAC_SET_##wc (R, _FP_NANFRAC_##fs); \ | |
| 69 | R##_c = FP_CLS_NAN; \ | |
| 70 | } while (0) | |
| 71 | ||
| 72 | #define _FP_DECL_EX int _frm __attribute__ ((unused)); | |
| 73 | #define FP_ROUNDMODE _frm | |
| 74 | ||
| 75 | #define FP_RND_NEAREST FE_TONEAREST | |
| 76 | #define FP_RND_ZERO FE_TOWARDZERO | |
| 77 | #define FP_RND_PINF FE_UPWARD | |
| 78 | #define FP_RND_MINF FE_DOWNWARD | |
| 79 | ||
| 80 | #define FP_EX_INVALID FE_INVALID | |
| 81 | #define FP_EX_OVERFLOW FE_OVERFLOW | |
| 82 | #define FP_EX_UNDERFLOW FE_UNDERFLOW | |
| 83 | #define FP_EX_DIVZERO FE_DIVBYZERO | |
| 84 | #define FP_EX_INEXACT FE_INEXACT | |
| 85 | ||
| 86 | #define _FP_TININESS_AFTER_ROUNDING 1 | |
| 87 | ||
| 88 | #ifdef __riscv_flen | |
| 89 | # define FP_INIT_ROUNDMODE \ | |
| 90 | do { \ | |
| 91 | __asm__ volatile ("frrm %0" : "=r" (_frm)); \ | |
| 92 | } while (0) | |
| 93 | ||
| 94 | # define FP_HANDLE_EXCEPTIONS \ | |
| 95 | do { \ | |
| 96 | if (__builtin_expect (_fex, 0)) \ | |
| 97 | __asm__ volatile ("csrs fflags, %0" : : "rK" (_fex)); \ | |
| 98 | } while (0) | |
| 99 | #else | |
| 100 | # define FP_INIT_ROUNDMODE _frm = FP_RND_NEAREST | |
| 101 | #endif |