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| 1 | /* RISC-V softfloat definitions |
|---|---|
| 2 | Copyright (C) 2017-2022 Free Software Foundation, Inc. |
| 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 |
| 18 | <https://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #include <fenv.h> |
| 21 | #include <fpu_control.h> |
| 22 | |
| 23 | #if __riscv_xlen == 32 |
| 24 | |
| 25 | # define _FP_W_TYPE_SIZE 32 |
| 26 | # define _FP_W_TYPE unsigned long |
| 27 | # define _FP_WS_TYPE signed long |
| 28 | # define _FP_I_TYPE long |
| 29 | |
| 30 | # define _FP_MUL_MEAT_S(R, X, Y) \ |
| 31 | _FP_MUL_MEAT_1_wide (_FP_WFRACBITS_S, R, X, Y, umul_ppmm) |
| 32 | # define _FP_MUL_MEAT_D(R, X, Y) \ |
| 33 | _FP_MUL_MEAT_2_wide (_FP_WFRACBITS_D, R, X, Y, umul_ppmm) |
| 34 | # define _FP_MUL_MEAT_Q(R, X, Y) \ |
| 35 | _FP_MUL_MEAT_4_wide (_FP_WFRACBITS_Q, R, X, Y, umul_ppmm) |
| 36 | |
| 37 | # define _FP_MUL_MEAT_DW_S(R, X, Y) \ |
| 38 | _FP_MUL_MEAT_DW_1_wide (_FP_WFRACBITS_S, R, X, Y, umul_ppmm) |
| 39 | # define _FP_MUL_MEAT_DW_D(R, X, Y) \ |
| 40 | _FP_MUL_MEAT_DW_2_wide (_FP_WFRACBITS_D, R, X, Y, umul_ppmm) |
| 41 | # define _FP_MUL_MEAT_DW_Q(R, X, Y) \ |
| 42 | _FP_MUL_MEAT_DW_4_wide (_FP_WFRACBITS_Q, R, X, Y, umul_ppmm) |
| 43 | |
| 44 | # define _FP_DIV_MEAT_S(R, X, Y) _FP_DIV_MEAT_1_udiv_norm (S, R, X, Y) |
| 45 | # define _FP_DIV_MEAT_D(R, X, Y) _FP_DIV_MEAT_2_udiv (D, R, X, Y) |
| 46 | # define _FP_DIV_MEAT_Q(R, X, Y) _FP_DIV_MEAT_4_udiv (Q, R, X, Y) |
| 47 | |
| 48 | # define _FP_NANFRAC_S _FP_QNANBIT_S |
| 49 | # define _FP_NANFRAC_D _FP_QNANBIT_D, 0 |
| 50 | # define _FP_NANFRAC_Q _FP_QNANBIT_Q, 0, 0, 0 |
| 51 | |
| 52 | #else |
| 53 | |
| 54 | # define _FP_W_TYPE_SIZE 64 |
| 55 | # define _FP_W_TYPE unsigned long long |
| 56 | # define _FP_WS_TYPE signed long long |
| 57 | # define _FP_I_TYPE long long |
| 58 | |
| 59 | # define _FP_MUL_MEAT_S(R, X, Y) \ |
| 60 | _FP_MUL_MEAT_1_imm (_FP_WFRACBITS_S, R, X, Y) |
| 61 | # define _FP_MUL_MEAT_D(R, X, Y) \ |
| 62 | _FP_MUL_MEAT_1_wide (_FP_WFRACBITS_D, R, X, Y, umul_ppmm) |
| 63 | # define _FP_MUL_MEAT_Q(R, X, Y) \ |
| 64 | _FP_MUL_MEAT_2_wide_3mul (_FP_WFRACBITS_Q, R, X, Y, umul_ppmm) |
| 65 | |
| 66 | # define _FP_MUL_MEAT_DW_S(R, X, Y) \ |
| 67 | _FP_MUL_MEAT_DW_1_imm (_FP_WFRACBITS_S, R, X, Y) |
| 68 | # define _FP_MUL_MEAT_DW_D(R, X, Y) \ |
| 69 | _FP_MUL_MEAT_DW_1_wide (_FP_WFRACBITS_D, R, X, Y, umul_ppmm) |
| 70 | # define _FP_MUL_MEAT_DW_Q(R, X, Y) \ |
| 71 | _FP_MUL_MEAT_DW_2_wide_3mul (_FP_WFRACBITS_Q, R, X, Y, umul_ppmm) |
| 72 | |
| 73 | # define _FP_DIV_MEAT_S(R, X, Y) _FP_DIV_MEAT_1_imm (S, R, X, Y, _FP_DIV_HELP_imm) |
| 74 | # define _FP_DIV_MEAT_D(R, X, Y) _FP_DIV_MEAT_1_udiv_norm (D, R, X, Y) |
| 75 | # define _FP_DIV_MEAT_Q(R, X, Y) _FP_DIV_MEAT_2_udiv (Q, R, X, Y) |
| 76 | |
| 77 | # define _FP_NANFRAC_S _FP_QNANBIT_S |
| 78 | # define _FP_NANFRAC_D _FP_QNANBIT_D |
| 79 | # define _FP_NANFRAC_Q _FP_QNANBIT_Q, 0 |
| 80 | |
| 81 | #endif |
| 82 | |
| 83 | #define _FP_NANSIGN_S 0 |
| 84 | #define _FP_NANSIGN_D 0 |
| 85 | #define _FP_NANSIGN_Q 0 |
| 86 | |
| 87 | #define _FP_KEEPNANFRACP 0 |
| 88 | #define _FP_QNANNEGATEDP 0 |
| 89 | |
| 90 | #define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \ |
| 91 | do { \ |
| 92 | R##_s = _FP_NANSIGN_##fs; \ |
| 93 | _FP_FRAC_SET_##wc (R, _FP_NANFRAC_##fs); \ |
| 94 | R##_c = FP_CLS_NAN; \ |
| 95 | } while (0) |
| 96 | |
| 97 | #define _FP_DECL_EX int _frm __attribute__ ((unused)); |
| 98 | #define FP_ROUNDMODE _frm |
| 99 | |
| 100 | #define FP_RND_NEAREST FE_TONEAREST |
| 101 | #define FP_RND_ZERO FE_TOWARDZERO |
| 102 | #define FP_RND_PINF FE_UPWARD |
| 103 | #define FP_RND_MINF FE_DOWNWARD |
| 104 | |
| 105 | #define FP_EX_INVALID FE_INVALID |
| 106 | #define FP_EX_OVERFLOW FE_OVERFLOW |
| 107 | #define FP_EX_UNDERFLOW FE_UNDERFLOW |
| 108 | #define FP_EX_DIVZERO FE_DIVBYZERO |
| 109 | #define FP_EX_INEXACT FE_INEXACT |
| 110 | |
| 111 | #define _FP_TININESS_AFTER_ROUNDING 1 |
| 112 | |
| 113 | #ifdef __riscv_flen |
| 114 | # define FP_INIT_ROUNDMODE \ |
| 115 | do { \ |
| 116 | __asm__ volatile ("frrm %0" : "=r" (_frm)); \ |
| 117 | } while (0) |
| 118 | |
| 119 | # define FP_HANDLE_EXCEPTIONS \ |
| 120 | do { \ |
| 121 | if (__builtin_expect (_fex, 0)) \ |
| 122 | __asm__ volatile ("csrs fflags, %0" : : "rK" (_fex)); \ |
| 123 | } while (0) |
| 124 | #else |
| 125 | # define FP_INIT_ROUNDMODE _frm = FP_RND_NEAREST |
| 126 | #endif |
| 127 |
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