| 1 | /* The common simulator framework for GDB, the GNU Debugger. |
| 2 | |
| 3 | Copyright 2002 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 2 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, write to the Free Software |
| 21 | Foundation, Inc., 59 Temple Place - Suite 330, |
| 22 | Boston, MA 02111-1307, USA. */ |
| 23 | |
| 24 | |
| 25 | #ifndef _SIM_BITS_C_ |
| 26 | #define _SIM_BITS_C_ |
| 27 | |
| 28 | #include "sim-basics.h" |
| 29 | #include "sim-assert.h" |
| 30 | #include "sim-io.h" |
| 31 | |
| 32 | |
| 33 | INLINE_SIM_BITS\ |
| 34 | (unsigned_word) |
| 35 | LSMASKED (unsigned_word val, |
| 36 | int start, |
| 37 | int stop) |
| 38 | { |
| 39 | /* NOTE - start, stop can wrap */ |
| 40 | val &= LSMASK (start, stop); |
| 41 | return val; |
| 42 | } |
| 43 | |
| 44 | |
| 45 | INLINE_SIM_BITS\ |
| 46 | (unsigned_word) |
| 47 | MSMASKED (unsigned_word val, |
| 48 | int start, |
| 49 | int stop) |
| 50 | { |
| 51 | /* NOTE - start, stop can wrap */ |
| 52 | val &= MSMASK (start, stop); |
| 53 | return val; |
| 54 | } |
| 55 | |
| 56 | |
| 57 | INLINE_SIM_BITS\ |
| 58 | (unsigned_word) |
| 59 | LSEXTRACTED (unsigned_word val, |
| 60 | int start, |
| 61 | int stop) |
| 62 | { |
| 63 | ASSERT (start >= stop); |
| 64 | #if (WITH_TARGET_WORD_BITSIZE == 64) |
| 65 | return LSEXTRACTED64 (val, start, stop); |
| 66 | #endif |
| 67 | #if (WITH_TARGET_WORD_BITSIZE == 32) |
| 68 | if (stop >= 32) |
| 69 | return 0; |
| 70 | else |
| 71 | { |
| 72 | if (start < 32) |
| 73 | val &= LSMASK (start, 0); |
| 74 | val >>= stop; |
| 75 | return val; |
| 76 | } |
| 77 | #endif |
| 78 | #if (WITH_TARGET_WORD_BITSIZE == 16) |
| 79 | if (stop >= 16) |
| 80 | return 0; |
| 81 | else |
| 82 | { |
| 83 | if (start < 16) |
| 84 | val &= LSMASK (start, 0); |
| 85 | val >>= stop; |
| 86 | return val; |
| 87 | } |
| 88 | #endif |
| 89 | } |
| 90 | |
| 91 | |
| 92 | INLINE_SIM_BITS\ |
| 93 | (unsigned_word) |
| 94 | MSEXTRACTED (unsigned_word val, |
| 95 | int start, |
| 96 | int stop) |
| 97 | { |
| 98 | ASSERT (start <= stop); |
| 99 | #if (WITH_TARGET_WORD_BITSIZE == 64) |
| 100 | return MSEXTRACTED64 (val, start, stop); |
| 101 | #endif |
| 102 | #if (WITH_TARGET_WORD_BITSIZE == 32) |
| 103 | if (stop < 32) |
| 104 | return 0; |
| 105 | else |
| 106 | { |
| 107 | if (start >= 32) |
| 108 | val &= MSMASK (start, 64 - 1); |
| 109 | val >>= (64 - stop - 1); |
| 110 | return val; |
| 111 | } |
| 112 | #endif |
| 113 | #if (WITH_TARGET_WORD_BITSIZE == 16) |
| 114 | if (stop < 16) |
| 115 | return 0; |
| 116 | else |
| 117 | { |
| 118 | if (start >= 16) |
| 119 | val &= MSMASK (start, 64 - 1); |
| 120 | val >>= (64 - stop - 1); |
| 121 | return val; |
| 122 | } |
| 123 | #endif |
| 124 | } |
| 125 | |
| 126 | |
| 127 | INLINE_SIM_BITS\ |
| 128 | (unsigned_word) |
| 129 | LSINSERTED (unsigned_word val, |
| 130 | int start, |
| 131 | int stop) |
| 132 | { |
| 133 | ASSERT (start >= stop); |
| 134 | #if (WITH_TARGET_WORD_BITSIZE == 64) |
| 135 | return LSINSERTED64 (val, start, stop); |
| 136 | #endif |
| 137 | #if (WITH_TARGET_WORD_BITSIZE == 32) |
| 138 | /* Bit numbers are 63..0, even for 32 bit targets. |
| 139 | On 32 bit targets we ignore 63..32 */ |
| 140 | if (stop >= 32) |
| 141 | return 0; |
| 142 | else |
| 143 | { |
| 144 | val <<= stop; |
| 145 | val &= LSMASK (start, stop); |
| 146 | return val; |
| 147 | } |
| 148 | #endif |
| 149 | #if (WITH_TARGET_WORD_BITSIZE == 16) |
| 150 | /* Bit numbers are 63..0, even for 16 bit targets. |
| 151 | On 16 bit targets we ignore 63..16 */ |
| 152 | if (stop >= 16) |
| 153 | return 0; |
| 154 | else |
| 155 | { |
| 156 | val <<= stop; |
| 157 | val &= LSMASK (start, stop); |
| 158 | return val; |
| 159 | } |
| 160 | #endif |
| 161 | } |
| 162 | |
| 163 | INLINE_SIM_BITS\ |
| 164 | (unsigned_word) |
| 165 | MSINSERTED (unsigned_word val, |
| 166 | int start, |
| 167 | int stop) |
| 168 | { |
| 169 | ASSERT (start <= stop); |
| 170 | #if (WITH_TARGET_WORD_BITSIZE == 64) |
| 171 | return MSINSERTED64 (val, start, stop); |
| 172 | #endif |
| 173 | #if (WITH_TARGET_WORD_BITSIZE == 32) |
| 174 | /* Bit numbers are 0..63, even for 32 bit targets. |
| 175 | On 32 bit targets we ignore 0..31. */ |
| 176 | if (stop < 32) |
| 177 | return 0; |
| 178 | else |
| 179 | { |
| 180 | val <<= ((64 - 1) - stop); |
| 181 | val &= MSMASK (start, stop); |
| 182 | return val; |
| 183 | } |
| 184 | #endif |
| 185 | #if (WITH_TARGET_WORD_BITSIZE == 16) |
| 186 | /* Bit numbers are 0..63, even for 16 bit targets. |
| 187 | On 16 bit targets we ignore 0..47. */ |
| 188 | if (stop < 32 + 16) |
| 189 | return 0; |
| 190 | else |
| 191 | { |
| 192 | val <<= ((64 - 1) - stop); |
| 193 | val &= MSMASK (start, stop); |
| 194 | return val; |
| 195 | } |
| 196 | #endif |
| 197 | } |
| 198 | |
| 199 | |
| 200 | |
| 201 | INLINE_SIM_BITS\ |
| 202 | (unsigned_word) |
| 203 | LSSEXT (signed_word val, |
| 204 | int sign_bit) |
| 205 | { |
| 206 | ASSERT (sign_bit < 64); |
| 207 | #if (WITH_TARGET_WORD_BITSIZE == 64) |
| 208 | return LSSEXT64 (val, sign_bit); |
| 209 | #endif |
| 210 | #if (WITH_TARGET_WORD_BITSIZE == 32) |
| 211 | if (sign_bit >= 32) |
| 212 | return val; |
| 213 | else { |
| 214 | val = LSSEXT32 (val, sign_bit); |
| 215 | return val; |
| 216 | } |
| 217 | #endif |
| 218 | #if (WITH_TARGET_WORD_BITSIZE == 16) |
| 219 | if (sign_bit >= 16) |
| 220 | return val; |
| 221 | else { |
| 222 | val = LSSEXT16 (val, sign_bit); |
| 223 | return val; |
| 224 | } |
| 225 | #endif |
| 226 | } |
| 227 | |
| 228 | INLINE_SIM_BITS\ |
| 229 | (unsigned_word) |
| 230 | MSSEXT (signed_word val, |
| 231 | int sign_bit) |
| 232 | { |
| 233 | ASSERT (sign_bit < 64); |
| 234 | #if (WITH_TARGET_WORD_BITSIZE == 64) |
| 235 | return MSSEXT64 (val, sign_bit); |
| 236 | #endif |
| 237 | #if (WITH_TARGET_WORD_BITSIZE == 32) |
| 238 | if (sign_bit < 32) |
| 239 | return val; |
| 240 | else { |
| 241 | val = MSSEXT32 (val, sign_bit - 32); |
| 242 | return val; |
| 243 | } |
| 244 | #endif |
| 245 | #if (WITH_TARGET_WORD_BITSIZE == 16) |
| 246 | if (sign_bit < 32 + 16) |
| 247 | return val; |
| 248 | else { |
| 249 | val = MSSEXT16 (val, sign_bit - 32 - 16); |
| 250 | return val; |
| 251 | } |
| 252 | #endif |
| 253 | } |
| 254 | |
| 255 | |
| 256 | |
| 257 | #define N 8 |
| 258 | #include "sim-n-bits.h" |
| 259 | #undef N |
| 260 | |
| 261 | #define N 16 |
| 262 | #include "sim-n-bits.h" |
| 263 | #undef N |
| 264 | |
| 265 | #define N 32 |
| 266 | #include "sim-n-bits.h" |
| 267 | #undef N |
| 268 | |
| 269 | #define N 64 |
| 270 | #include "sim-n-bits.h" |
| 271 | #undef N |
| 272 | |
| 273 | #endif /* _SIM_BITS_C_ */ |