| 1 | /* The common simulator framework for GDB, the GNU Debugger. |
| 2 | |
| 3 | Copyright 2002, 2007, 2008 Free Software Foundation, Inc. |
| 4 | |
| 5 | Contributed by Andrew Cagney and Red Hat. |
| 6 | |
| 7 | This file is part of GDB. |
| 8 | |
| 9 | This program is free software; you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License as published by |
| 11 | the Free Software Foundation; either version 3 of the License, or |
| 12 | (at your option) any later version. |
| 13 | |
| 14 | This program is distributed in the hope that it will be useful, |
| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License |
| 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 21 | |
| 22 | |
| 23 | #ifndef _SIM_BITS_C_ |
| 24 | #define _SIM_BITS_C_ |
| 25 | |
| 26 | #include "sim-basics.h" |
| 27 | #include "sim-assert.h" |
| 28 | #include "sim-io.h" |
| 29 | |
| 30 | |
| 31 | INLINE_SIM_BITS\ |
| 32 | (unsigned_word) |
| 33 | LSMASKED (unsigned_word val, |
| 34 | int start, |
| 35 | int stop) |
| 36 | { |
| 37 | /* NOTE - start, stop can wrap */ |
| 38 | val &= LSMASK (start, stop); |
| 39 | return val; |
| 40 | } |
| 41 | |
| 42 | |
| 43 | INLINE_SIM_BITS\ |
| 44 | (unsigned_word) |
| 45 | MSMASKED (unsigned_word val, |
| 46 | int start, |
| 47 | int stop) |
| 48 | { |
| 49 | /* NOTE - start, stop can wrap */ |
| 50 | val &= MSMASK (start, stop); |
| 51 | return val; |
| 52 | } |
| 53 | |
| 54 | |
| 55 | INLINE_SIM_BITS\ |
| 56 | (unsigned_word) |
| 57 | LSEXTRACTED (unsigned_word val, |
| 58 | int start, |
| 59 | int stop) |
| 60 | { |
| 61 | ASSERT (start >= stop); |
| 62 | #if (WITH_TARGET_WORD_BITSIZE == 64) |
| 63 | return LSEXTRACTED64 (val, start, stop); |
| 64 | #endif |
| 65 | #if (WITH_TARGET_WORD_BITSIZE == 32) |
| 66 | if (stop >= 32) |
| 67 | return 0; |
| 68 | else |
| 69 | { |
| 70 | if (start < 32) |
| 71 | val &= LSMASK (start, 0); |
| 72 | val >>= stop; |
| 73 | return val; |
| 74 | } |
| 75 | #endif |
| 76 | #if (WITH_TARGET_WORD_BITSIZE == 16) |
| 77 | if (stop >= 16) |
| 78 | return 0; |
| 79 | else |
| 80 | { |
| 81 | if (start < 16) |
| 82 | val &= LSMASK (start, 0); |
| 83 | val >>= stop; |
| 84 | return val; |
| 85 | } |
| 86 | #endif |
| 87 | } |
| 88 | |
| 89 | |
| 90 | INLINE_SIM_BITS\ |
| 91 | (unsigned_word) |
| 92 | MSEXTRACTED (unsigned_word val, |
| 93 | int start, |
| 94 | int stop) |
| 95 | { |
| 96 | ASSERT (start <= stop); |
| 97 | #if (WITH_TARGET_WORD_BITSIZE == 64) |
| 98 | return MSEXTRACTED64 (val, start, stop); |
| 99 | #endif |
| 100 | #if (WITH_TARGET_WORD_BITSIZE == 32) |
| 101 | if (stop < 32) |
| 102 | return 0; |
| 103 | else |
| 104 | { |
| 105 | if (start >= 32) |
| 106 | val &= MSMASK (start, 64 - 1); |
| 107 | val >>= (64 - stop - 1); |
| 108 | return val; |
| 109 | } |
| 110 | #endif |
| 111 | #if (WITH_TARGET_WORD_BITSIZE == 16) |
| 112 | if (stop < 16) |
| 113 | return 0; |
| 114 | else |
| 115 | { |
| 116 | if (start >= 16) |
| 117 | val &= MSMASK (start, 64 - 1); |
| 118 | val >>= (64 - stop - 1); |
| 119 | return val; |
| 120 | } |
| 121 | #endif |
| 122 | } |
| 123 | |
| 124 | |
| 125 | INLINE_SIM_BITS\ |
| 126 | (unsigned_word) |
| 127 | LSINSERTED (unsigned_word val, |
| 128 | int start, |
| 129 | int stop) |
| 130 | { |
| 131 | ASSERT (start >= stop); |
| 132 | #if (WITH_TARGET_WORD_BITSIZE == 64) |
| 133 | return LSINSERTED64 (val, start, stop); |
| 134 | #endif |
| 135 | #if (WITH_TARGET_WORD_BITSIZE == 32) |
| 136 | /* Bit numbers are 63..0, even for 32 bit targets. |
| 137 | On 32 bit targets we ignore 63..32 */ |
| 138 | if (stop >= 32) |
| 139 | return 0; |
| 140 | else |
| 141 | { |
| 142 | val <<= stop; |
| 143 | val &= LSMASK (start, stop); |
| 144 | return val; |
| 145 | } |
| 146 | #endif |
| 147 | #if (WITH_TARGET_WORD_BITSIZE == 16) |
| 148 | /* Bit numbers are 63..0, even for 16 bit targets. |
| 149 | On 16 bit targets we ignore 63..16 */ |
| 150 | if (stop >= 16) |
| 151 | return 0; |
| 152 | else |
| 153 | { |
| 154 | val <<= stop; |
| 155 | val &= LSMASK (start, stop); |
| 156 | return val; |
| 157 | } |
| 158 | #endif |
| 159 | } |
| 160 | |
| 161 | INLINE_SIM_BITS\ |
| 162 | (unsigned_word) |
| 163 | MSINSERTED (unsigned_word val, |
| 164 | int start, |
| 165 | int stop) |
| 166 | { |
| 167 | ASSERT (start <= stop); |
| 168 | #if (WITH_TARGET_WORD_BITSIZE == 64) |
| 169 | return MSINSERTED64 (val, start, stop); |
| 170 | #endif |
| 171 | #if (WITH_TARGET_WORD_BITSIZE == 32) |
| 172 | /* Bit numbers are 0..63, even for 32 bit targets. |
| 173 | On 32 bit targets we ignore 0..31. */ |
| 174 | if (stop < 32) |
| 175 | return 0; |
| 176 | else |
| 177 | { |
| 178 | val <<= ((64 - 1) - stop); |
| 179 | val &= MSMASK (start, stop); |
| 180 | return val; |
| 181 | } |
| 182 | #endif |
| 183 | #if (WITH_TARGET_WORD_BITSIZE == 16) |
| 184 | /* Bit numbers are 0..63, even for 16 bit targets. |
| 185 | On 16 bit targets we ignore 0..47. */ |
| 186 | if (stop < 32 + 16) |
| 187 | return 0; |
| 188 | else |
| 189 | { |
| 190 | val <<= ((64 - 1) - stop); |
| 191 | val &= MSMASK (start, stop); |
| 192 | return val; |
| 193 | } |
| 194 | #endif |
| 195 | } |
| 196 | |
| 197 | |
| 198 | |
| 199 | INLINE_SIM_BITS\ |
| 200 | (unsigned_word) |
| 201 | LSSEXT (signed_word val, |
| 202 | int sign_bit) |
| 203 | { |
| 204 | ASSERT (sign_bit < 64); |
| 205 | #if (WITH_TARGET_WORD_BITSIZE == 64) |
| 206 | return LSSEXT64 (val, sign_bit); |
| 207 | #endif |
| 208 | #if (WITH_TARGET_WORD_BITSIZE == 32) |
| 209 | if (sign_bit >= 32) |
| 210 | return val; |
| 211 | else { |
| 212 | val = LSSEXT32 (val, sign_bit); |
| 213 | return val; |
| 214 | } |
| 215 | #endif |
| 216 | #if (WITH_TARGET_WORD_BITSIZE == 16) |
| 217 | if (sign_bit >= 16) |
| 218 | return val; |
| 219 | else { |
| 220 | val = LSSEXT16 (val, sign_bit); |
| 221 | return val; |
| 222 | } |
| 223 | #endif |
| 224 | } |
| 225 | |
| 226 | INLINE_SIM_BITS\ |
| 227 | (unsigned_word) |
| 228 | MSSEXT (signed_word val, |
| 229 | int sign_bit) |
| 230 | { |
| 231 | ASSERT (sign_bit < 64); |
| 232 | #if (WITH_TARGET_WORD_BITSIZE == 64) |
| 233 | return MSSEXT64 (val, sign_bit); |
| 234 | #endif |
| 235 | #if (WITH_TARGET_WORD_BITSIZE == 32) |
| 236 | if (sign_bit < 32) |
| 237 | return val; |
| 238 | else { |
| 239 | val = MSSEXT32 (val, sign_bit - 32); |
| 240 | return val; |
| 241 | } |
| 242 | #endif |
| 243 | #if (WITH_TARGET_WORD_BITSIZE == 16) |
| 244 | if (sign_bit < 32 + 16) |
| 245 | return val; |
| 246 | else { |
| 247 | val = MSSEXT16 (val, sign_bit - 32 - 16); |
| 248 | return val; |
| 249 | } |
| 250 | #endif |
| 251 | } |
| 252 | |
| 253 | |
| 254 | |
| 255 | #define N 8 |
| 256 | #include "sim-n-bits.h" |
| 257 | #undef N |
| 258 | |
| 259 | #define N 16 |
| 260 | #include "sim-n-bits.h" |
| 261 | #undef N |
| 262 | |
| 263 | #define N 32 |
| 264 | #include "sim-n-bits.h" |
| 265 | #undef N |
| 266 | |
| 267 | #define N 64 |
| 268 | #include "sim-n-bits.h" |
| 269 | #undef N |
| 270 | |
| 271 | #endif /* _SIM_BITS_C_ */ |