lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 1 | /* Software floating-point emulation. |
| 2 | Definitions for IEEE Single Precision. |
| 3 | Copyright (C) 1997-2015 Free Software Foundation, Inc. |
| 4 | This file is part of the GNU C Library. |
| 5 | Contributed by Richard Henderson (rth@cygnus.com), |
| 6 | Jakub Jelinek (jj@ultra.linux.cz), |
| 7 | David S. Miller (davem@redhat.com) and |
| 8 | Peter Maydell (pmaydell@chiark.greenend.org.uk). |
| 9 | |
| 10 | The GNU C Library is free software; you can redistribute it and/or |
| 11 | modify it under the terms of the GNU Lesser General Public |
| 12 | License as published by the Free Software Foundation; either |
| 13 | version 2.1 of the License, or (at your option) any later version. |
| 14 | |
| 15 | In addition to the permissions in the GNU Lesser General Public |
| 16 | License, the Free Software Foundation gives you unlimited |
| 17 | permission to link the compiled version of this file into |
| 18 | combinations with other programs, and to distribute those |
| 19 | combinations without any restriction coming from the use of this |
| 20 | file. (The Lesser General Public License restrictions do apply in |
| 21 | other respects; for example, they cover modification of the file, |
| 22 | and distribution when not linked into a combine executable.) |
| 23 | |
| 24 | The GNU C Library is distributed in the hope that it will be useful, |
| 25 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 26 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 27 | Lesser General Public License for more details. |
| 28 | |
| 29 | You should have received a copy of the GNU Lesser General Public |
| 30 | License along with the GNU C Library; if not, see |
| 31 | <http://www.gnu.org/licenses/>. */ |
| 32 | |
| 33 | #ifndef SOFT_FP_SINGLE_H |
| 34 | #define SOFT_FP_SINGLE_H 1 |
| 35 | |
| 36 | #if _FP_W_TYPE_SIZE < 32 |
| 37 | # error "Here's a nickel kid. Go buy yourself a real computer." |
| 38 | #endif |
| 39 | |
| 40 | #define _FP_FRACTBITS_S _FP_W_TYPE_SIZE |
| 41 | |
| 42 | #if _FP_W_TYPE_SIZE < 64 |
| 43 | # define _FP_FRACTBITS_DW_S (2 * _FP_W_TYPE_SIZE) |
| 44 | #else |
| 45 | # define _FP_FRACTBITS_DW_S _FP_W_TYPE_SIZE |
| 46 | #endif |
| 47 | |
| 48 | #define _FP_FRACBITS_S 24 |
| 49 | #define _FP_FRACXBITS_S (_FP_FRACTBITS_S - _FP_FRACBITS_S) |
| 50 | #define _FP_WFRACBITS_S (_FP_WORKBITS + _FP_FRACBITS_S) |
| 51 | #define _FP_WFRACXBITS_S (_FP_FRACTBITS_S - _FP_WFRACBITS_S) |
| 52 | #define _FP_EXPBITS_S 8 |
| 53 | #define _FP_EXPBIAS_S 127 |
| 54 | #define _FP_EXPMAX_S 255 |
| 55 | #define _FP_QNANBIT_S ((_FP_W_TYPE) 1 << (_FP_FRACBITS_S-2)) |
| 56 | #define _FP_QNANBIT_SH_S ((_FP_W_TYPE) 1 << (_FP_FRACBITS_S-2+_FP_WORKBITS)) |
| 57 | #define _FP_IMPLBIT_S ((_FP_W_TYPE) 1 << (_FP_FRACBITS_S-1)) |
| 58 | #define _FP_IMPLBIT_SH_S ((_FP_W_TYPE) 1 << (_FP_FRACBITS_S-1+_FP_WORKBITS)) |
| 59 | #define _FP_OVERFLOW_S ((_FP_W_TYPE) 1 << (_FP_WFRACBITS_S)) |
| 60 | |
| 61 | #define _FP_WFRACBITS_DW_S (2 * _FP_WFRACBITS_S) |
| 62 | #define _FP_WFRACXBITS_DW_S (_FP_FRACTBITS_DW_S - _FP_WFRACBITS_DW_S) |
| 63 | #define _FP_HIGHBIT_DW_S \ |
| 64 | ((_FP_W_TYPE) 1 << (_FP_WFRACBITS_DW_S - 1) % _FP_W_TYPE_SIZE) |
| 65 | |
| 66 | /* The implementation of _FP_MUL_MEAT_S and _FP_DIV_MEAT_S should be |
| 67 | chosen by the target machine. */ |
| 68 | |
| 69 | typedef float SFtype __attribute__ ((mode (SF))); |
| 70 | |
| 71 | union _FP_UNION_S |
| 72 | { |
| 73 | SFtype flt; |
| 74 | struct _FP_STRUCT_LAYOUT |
| 75 | { |
| 76 | #if __BYTE_ORDER == __BIG_ENDIAN |
| 77 | unsigned sign : 1; |
| 78 | unsigned exp : _FP_EXPBITS_S; |
| 79 | unsigned frac : _FP_FRACBITS_S - (_FP_IMPLBIT_S != 0); |
| 80 | #else |
| 81 | unsigned frac : _FP_FRACBITS_S - (_FP_IMPLBIT_S != 0); |
| 82 | unsigned exp : _FP_EXPBITS_S; |
| 83 | unsigned sign : 1; |
| 84 | #endif |
| 85 | } bits __attribute__ ((packed)); |
| 86 | }; |
| 87 | |
| 88 | #define FP_DECL_S(X) _FP_DECL (1, X) |
| 89 | #define FP_UNPACK_RAW_S(X, val) _FP_UNPACK_RAW_1 (S, X, (val)) |
| 90 | #define FP_UNPACK_RAW_SP(X, val) _FP_UNPACK_RAW_1_P (S, X, (val)) |
| 91 | #define FP_PACK_RAW_S(val, X) _FP_PACK_RAW_1 (S, (val), X) |
| 92 | #define FP_PACK_RAW_SP(val, X) \ |
| 93 | do \ |
| 94 | { \ |
| 95 | if (!FP_INHIBIT_RESULTS) \ |
| 96 | _FP_PACK_RAW_1_P (S, (val), X); \ |
| 97 | } \ |
| 98 | while (0) |
| 99 | |
| 100 | #define FP_UNPACK_S(X, val) \ |
| 101 | do \ |
| 102 | { \ |
| 103 | _FP_UNPACK_RAW_1 (S, X, (val)); \ |
| 104 | _FP_UNPACK_CANONICAL (S, 1, X); \ |
| 105 | } \ |
| 106 | while (0) |
| 107 | |
| 108 | #define FP_UNPACK_SP(X, val) \ |
| 109 | do \ |
| 110 | { \ |
| 111 | _FP_UNPACK_RAW_1_P (S, X, (val)); \ |
| 112 | _FP_UNPACK_CANONICAL (S, 1, X); \ |
| 113 | } \ |
| 114 | while (0) |
| 115 | |
| 116 | #define FP_UNPACK_SEMIRAW_S(X, val) \ |
| 117 | do \ |
| 118 | { \ |
| 119 | _FP_UNPACK_RAW_1 (S, X, (val)); \ |
| 120 | _FP_UNPACK_SEMIRAW (S, 1, X); \ |
| 121 | } \ |
| 122 | while (0) |
| 123 | |
| 124 | #define FP_UNPACK_SEMIRAW_SP(X, val) \ |
| 125 | do \ |
| 126 | { \ |
| 127 | _FP_UNPACK_RAW_1_P (S, X, (val)); \ |
| 128 | _FP_UNPACK_SEMIRAW (S, 1, X); \ |
| 129 | } \ |
| 130 | while (0) |
| 131 | |
| 132 | #define FP_PACK_S(val, X) \ |
| 133 | do \ |
| 134 | { \ |
| 135 | _FP_PACK_CANONICAL (S, 1, X); \ |
| 136 | _FP_PACK_RAW_1 (S, (val), X); \ |
| 137 | } \ |
| 138 | while (0) |
| 139 | |
| 140 | #define FP_PACK_SP(val, X) \ |
| 141 | do \ |
| 142 | { \ |
| 143 | _FP_PACK_CANONICAL (S, 1, X); \ |
| 144 | if (!FP_INHIBIT_RESULTS) \ |
| 145 | _FP_PACK_RAW_1_P (S, (val), X); \ |
| 146 | } \ |
| 147 | while (0) |
| 148 | |
| 149 | #define FP_PACK_SEMIRAW_S(val, X) \ |
| 150 | do \ |
| 151 | { \ |
| 152 | _FP_PACK_SEMIRAW (S, 1, X); \ |
| 153 | _FP_PACK_RAW_1 (S, (val), X); \ |
| 154 | } \ |
| 155 | while (0) |
| 156 | |
| 157 | #define FP_PACK_SEMIRAW_SP(val, X) \ |
| 158 | do \ |
| 159 | { \ |
| 160 | _FP_PACK_SEMIRAW (S, 1, X); \ |
| 161 | if (!FP_INHIBIT_RESULTS) \ |
| 162 | _FP_PACK_RAW_1_P (S, (val), X); \ |
| 163 | } \ |
| 164 | while (0) |
| 165 | |
| 166 | #define FP_ISSIGNAN_S(X) _FP_ISSIGNAN (S, 1, X) |
| 167 | #define FP_NEG_S(R, X) _FP_NEG (S, 1, R, X) |
| 168 | #define FP_ADD_S(R, X, Y) _FP_ADD (S, 1, R, X, Y) |
| 169 | #define FP_SUB_S(R, X, Y) _FP_SUB (S, 1, R, X, Y) |
| 170 | #define FP_MUL_S(R, X, Y) _FP_MUL (S, 1, R, X, Y) |
| 171 | #define FP_DIV_S(R, X, Y) _FP_DIV (S, 1, R, X, Y) |
| 172 | #define FP_SQRT_S(R, X) _FP_SQRT (S, 1, R, X) |
| 173 | #define _FP_SQRT_MEAT_S(R, S, T, X, Q) _FP_SQRT_MEAT_1 (R, S, T, X, (Q)) |
| 174 | |
| 175 | #if _FP_W_TYPE_SIZE < 64 |
| 176 | # define FP_FMA_S(R, X, Y, Z) _FP_FMA (S, 1, 2, R, X, Y, Z) |
| 177 | #else |
| 178 | # define FP_FMA_S(R, X, Y, Z) _FP_FMA (S, 1, 1, R, X, Y, Z) |
| 179 | #endif |
| 180 | |
| 181 | #define FP_CMP_S(r, X, Y, un, ex) _FP_CMP (S, 1, (r), X, Y, (un), (ex)) |
| 182 | #define FP_CMP_EQ_S(r, X, Y, ex) _FP_CMP_EQ (S, 1, (r), X, Y, (ex)) |
| 183 | #define FP_CMP_UNORD_S(r, X, Y, ex) _FP_CMP_UNORD (S, 1, (r), X, Y, (ex)) |
| 184 | |
| 185 | #define FP_TO_INT_S(r, X, rsz, rsg) _FP_TO_INT (S, 1, (r), X, (rsz), (rsg)) |
| 186 | #define FP_TO_INT_ROUND_S(r, X, rsz, rsg) \ |
| 187 | _FP_TO_INT_ROUND (S, 1, (r), X, (rsz), (rsg)) |
| 188 | #define FP_FROM_INT_S(X, r, rs, rt) _FP_FROM_INT (S, 1, X, (r), (rs), rt) |
| 189 | |
| 190 | #define _FP_FRAC_HIGH_S(X) _FP_FRAC_HIGH_1 (X) |
| 191 | #define _FP_FRAC_HIGH_RAW_S(X) _FP_FRAC_HIGH_1 (X) |
| 192 | |
| 193 | #if _FP_W_TYPE_SIZE < 64 |
| 194 | # define _FP_FRAC_HIGH_DW_S(X) _FP_FRAC_HIGH_2 (X) |
| 195 | #else |
| 196 | # define _FP_FRAC_HIGH_DW_S(X) _FP_FRAC_HIGH_1 (X) |
| 197 | #endif |
| 198 | |
| 199 | #endif /* !SOFT_FP_SINGLE_H */ |