1 /* Software floating-point emulation. 2 Definitions for IEEE Single Precision. 3 Copyright (C) 1997-2022 Free Software Foundation, Inc. 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 In addition to the permissions in the GNU Lesser General Public 12 License, the Free Software Foundation gives you unlimited 13 permission to link the compiled version of this file into 14 combinations with other programs, and to distribute those 15 combinations without any restriction coming from the use of this 16 file. (The Lesser General Public License restrictions do apply in 17 other respects; for example, they cover modification of the file, 18 and distribution when not linked into a combine executable.) 19 20 The GNU C Library is distributed in the hope that it will be useful, 21 but WITHOUT ANY WARRANTY; without even the implied warranty of 22 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 23 Lesser General Public License for more details. 24 25 You should have received a copy of the GNU Lesser General Public 26 License along with the GNU C Library; if not, see 27 <https://www.gnu.org/licenses/>. */ 28 29 #ifndef SOFT_FP_SINGLE_H 30 #define SOFT_FP_SINGLE_H 1 31 32 #if _FP_W_TYPE_SIZE < 32 33 # error "Here's a nickel kid. Go buy yourself a real computer." 34 #endif 35 36 #define _FP_FRACTBITS_S _FP_W_TYPE_SIZE 37 38 #if _FP_W_TYPE_SIZE < 64 39 # define _FP_FRACTBITS_DW_S (2 * _FP_W_TYPE_SIZE) 40 #else 41 # define _FP_FRACTBITS_DW_S _FP_W_TYPE_SIZE 42 #endif 43 44 #define _FP_FRACBITS_S 24 45 #define _FP_FRACXBITS_S (_FP_FRACTBITS_S - _FP_FRACBITS_S) 46 #define _FP_WFRACBITS_S (_FP_WORKBITS + _FP_FRACBITS_S) 47 #define _FP_WFRACXBITS_S (_FP_FRACTBITS_S - _FP_WFRACBITS_S) 48 #define _FP_EXPBITS_S 8 49 #define _FP_EXPBIAS_S 127 50 #define _FP_EXPMAX_S 255 51 #define _FP_QNANBIT_S ((_FP_W_TYPE) 1 << (_FP_FRACBITS_S-2)) 52 #define _FP_QNANBIT_SH_S ((_FP_W_TYPE) 1 << (_FP_FRACBITS_S-2+_FP_WORKBITS)) 53 #define _FP_IMPLBIT_S ((_FP_W_TYPE) 1 << (_FP_FRACBITS_S-1)) 54 #define _FP_IMPLBIT_SH_S ((_FP_W_TYPE) 1 << (_FP_FRACBITS_S-1+_FP_WORKBITS)) 55 #define _FP_OVERFLOW_S ((_FP_W_TYPE) 1 << (_FP_WFRACBITS_S)) 56 57 #define _FP_WFRACBITS_DW_S (2 * _FP_WFRACBITS_S) 58 #define _FP_WFRACXBITS_DW_S (_FP_FRACTBITS_DW_S - _FP_WFRACBITS_DW_S) 59 #define _FP_HIGHBIT_DW_S \ 60 ((_FP_W_TYPE) 1 << (_FP_WFRACBITS_DW_S - 1) % _FP_W_TYPE_SIZE) 61 62 /* The implementation of _FP_MUL_MEAT_S and _FP_DIV_MEAT_S should be 63 chosen by the target machine. */ 64 65 typedef float SFtype __attribute__ ((mode (SF))); 66 67 union _FP_UNION_S 68 { 69 SFtype flt; 70 struct _FP_STRUCT_LAYOUT 71 { 72 #if __BYTE_ORDER == __BIG_ENDIAN 73 unsigned sign : 1; 74 unsigned exp : _FP_EXPBITS_S; 75 unsigned frac : _FP_FRACBITS_S - (_FP_IMPLBIT_S != 0); 76 #else 77 unsigned frac : _FP_FRACBITS_S - (_FP_IMPLBIT_S != 0); 78 unsigned exp : _FP_EXPBITS_S; 79 unsigned sign : 1; 80 #endif 81 } bits; 82 }; 83 84 #define FP_DECL_S(X) _FP_DECL (1, X) 85 #define FP_UNPACK_RAW_S(X, val) _FP_UNPACK_RAW_1 (S, X, (val)) 86 #define FP_UNPACK_RAW_SP(X, val) _FP_UNPACK_RAW_1_P (S, X, (val)) 87 #define FP_PACK_RAW_S(val, X) _FP_PACK_RAW_1 (S, (val), X) 88 #define FP_PACK_RAW_SP(val, X) \ 89 do \ 90 { \ 91 if (!FP_INHIBIT_RESULTS) \ 92 _FP_PACK_RAW_1_P (S, (val), X); \ 93 } \ 94 while (0) 95 96 #define FP_UNPACK_S(X, val) \ 97 do \ 98 { \ 99 _FP_UNPACK_RAW_1 (S, X, (val)); \ 100 _FP_UNPACK_CANONICAL (S, 1, X); \ 101 } \ 102 while (0) 103 104 #define FP_UNPACK_SP(X, val) \ 105 do \ 106 { \ 107 _FP_UNPACK_RAW_1_P (S, X, (val)); \ 108 _FP_UNPACK_CANONICAL (S, 1, X); \ 109 } \ 110 while (0) 111 112 #define FP_UNPACK_SEMIRAW_S(X, val) \ 113 do \ 114 { \ 115 _FP_UNPACK_RAW_1 (S, X, (val)); \ 116 _FP_UNPACK_SEMIRAW (S, 1, X); \ 117 } \ 118 while (0) 119 120 #define FP_UNPACK_SEMIRAW_SP(X, val) \ 121 do \ 122 { \ 123 _FP_UNPACK_RAW_1_P (S, X, (val)); \ 124 _FP_UNPACK_SEMIRAW (S, 1, X); \ 125 } \ 126 while (0) 127 128 #define FP_PACK_S(val, X) \ 129 do \ 130 { \ 131 _FP_PACK_CANONICAL (S, 1, X); \ 132 _FP_PACK_RAW_1 (S, (val), X); \ 133 } \ 134 while (0) 135 136 #define FP_PACK_SP(val, X) \ 137 do \ 138 { \ 139 _FP_PACK_CANONICAL (S, 1, X); \ 140 if (!FP_INHIBIT_RESULTS) \ 141 _FP_PACK_RAW_1_P (S, (val), X); \ 142 } \ 143 while (0) 144 145 #define FP_PACK_SEMIRAW_S(val, X) \ 146 do \ 147 { \ 148 _FP_PACK_SEMIRAW (S, 1, X); \ 149 _FP_PACK_RAW_1 (S, (val), X); \ 150 } \ 151 while (0) 152 153 #define FP_PACK_SEMIRAW_SP(val, X) \ 154 do \ 155 { \ 156 _FP_PACK_SEMIRAW (S, 1, X); \ 157 if (!FP_INHIBIT_RESULTS) \ 158 _FP_PACK_RAW_1_P (S, (val), X); \ 159 } \ 160 while (0) 161 162 #define FP_ISSIGNAN_S(X) _FP_ISSIGNAN (S, 1, X) 163 #define FP_NEG_S(R, X) _FP_NEG (S, 1, R, X) 164 #define FP_ADD_S(R, X, Y) _FP_ADD (S, 1, R, X, Y) 165 #define FP_SUB_S(R, X, Y) _FP_SUB (S, 1, R, X, Y) 166 #define FP_MUL_S(R, X, Y) _FP_MUL (S, 1, R, X, Y) 167 #define FP_DIV_S(R, X, Y) _FP_DIV (S, 1, R, X, Y) 168 #define FP_SQRT_S(R, X) _FP_SQRT (S, 1, R, X) 169 #define _FP_SQRT_MEAT_S(R, S, T, X, Q) _FP_SQRT_MEAT_1 (R, S, T, X, (Q)) 170 171 #if _FP_W_TYPE_SIZE < 64 172 # define FP_FMA_S(R, X, Y, Z) _FP_FMA (S, 1, 2, R, X, Y, Z) 173 #else 174 # define FP_FMA_S(R, X, Y, Z) _FP_FMA (S, 1, 1, R, X, Y, Z) 175 #endif 176 177 #define FP_CMP_S(r, X, Y, un, ex) _FP_CMP (S, 1, (r), X, Y, (un), (ex)) 178 #define FP_CMP_EQ_S(r, X, Y, ex) _FP_CMP_EQ (S, 1, (r), X, Y, (ex)) 179 #define FP_CMP_UNORD_S(r, X, Y, ex) _FP_CMP_UNORD (S, 1, (r), X, Y, (ex)) 180 181 #define FP_TO_INT_S(r, X, rsz, rsg) _FP_TO_INT (S, 1, (r), X, (rsz), (rsg)) 182 #define FP_TO_INT_ROUND_S(r, X, rsz, rsg) \ 183 _FP_TO_INT_ROUND (S, 1, (r), X, (rsz), (rsg)) 184 #define FP_FROM_INT_S(X, r, rs, rt) _FP_FROM_INT (S, 1, X, (r), (rs), rt) 185 186 #define _FP_FRAC_HIGH_S(X) _FP_FRAC_HIGH_1 (X) 187 #define _FP_FRAC_HIGH_RAW_S(X) _FP_FRAC_HIGH_1 (X) 188 189 #if _FP_W_TYPE_SIZE < 64 190 # define _FP_FRAC_HIGH_DW_S(X) _FP_FRAC_HIGH_2 (X) 191 #else 192 # define _FP_FRAC_HIGH_DW_S(X) _FP_FRAC_HIGH_1 (X) 193 #endif 194 195 #endif /* !SOFT_FP_SINGLE_H */ 196