| 1 | // -*- C -*- |
| 2 | |
| 3 | // Simulator definition for the MIPS16e instructions. |
| 4 | // Copyright (C) 2005 Free Software Foundation, Inc. |
| 5 | // Contributed by Nigel Stephens (nigel@mips.com) and |
| 6 | // David Ung (davidu@mips.com) of MIPS Technologies. |
| 7 | // |
| 8 | // This file is part of GDB, the GNU debugger. |
| 9 | // |
| 10 | // This program is free software; you can redistribute it and/or modify |
| 11 | // it under the terms of the GNU General Public License as published by |
| 12 | // the Free Software Foundation; either version 2, or (at your option) |
| 13 | // any later version. |
| 14 | // |
| 15 | // This program is distributed in the hope that it will be useful, |
| 16 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | // GNU General Public License for more details. |
| 19 | // |
| 20 | // You should have received a copy of the GNU General Public License along |
| 21 | // with this program; if not, write to the Free Software Foundation, Inc., |
| 22 | // 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 23 | |
| 24 | |
| 25 | 11101,3.RX,100,10001:RR:16::SEB |
| 26 | "seb r<TRX>" |
| 27 | *mips16e: |
| 28 | { |
| 29 | TRACE_ALU_INPUT1 (GPR[TRX]); |
| 30 | GPR[TRX] = EXTEND8 (GPR[TRX]); |
| 31 | TRACE_ALU_RESULT (GPR[TRX]); |
| 32 | } |
| 33 | |
| 34 | |
| 35 | 11101,3.RX,101,10001:RR:16::SEH |
| 36 | "seh r<TRX>" |
| 37 | *mips16e: |
| 38 | { |
| 39 | TRACE_ALU_INPUT1 (GPR[TRX]); |
| 40 | GPR[TRX] = EXTEND16 (GPR[TRX]); |
| 41 | TRACE_ALU_RESULT (GPR[TRX]); |
| 42 | } |
| 43 | |
| 44 | 11101,3.RX,110,10001:RR:16::SEW |
| 45 | "sew r<TRX>" |
| 46 | *mips16e: |
| 47 | { |
| 48 | check_u64 (SD_, instruction_0); |
| 49 | TRACE_ALU_INPUT1 (GPR[TRX]); |
| 50 | GPR[TRX] = EXTEND32 (GPR[TRX]); |
| 51 | TRACE_ALU_RESULT (GPR[TRX]); |
| 52 | } |
| 53 | |
| 54 | 11101,3.RX,000,10001:RR:16::ZEB |
| 55 | "zeb r<TRX>" |
| 56 | *mips16e: |
| 57 | { |
| 58 | TRACE_ALU_INPUT1 (GPR[TRX]); |
| 59 | GPR[TRX] = (unsigned_word)(unsigned8)(GPR[TRX]); |
| 60 | TRACE_ALU_RESULT (GPR[TRX]); |
| 61 | } |
| 62 | |
| 63 | 11101,3.RX,001,10001:RR:16::ZEH |
| 64 | "zeh r<TRX>" |
| 65 | *mips16e: |
| 66 | { |
| 67 | TRACE_ALU_INPUT1 (GPR[TRX]); |
| 68 | GPR[TRX] = (unsigned_word)(unsigned16)(GPR[TRX]); |
| 69 | TRACE_ALU_RESULT (GPR[TRX]); |
| 70 | } |
| 71 | |
| 72 | 11101,3.RX,010,10001:RR:16::ZEW |
| 73 | "zew r<TRX>" |
| 74 | *mips16e: |
| 75 | { |
| 76 | check_u64 (SD_, instruction_0); |
| 77 | TRACE_ALU_INPUT1 (GPR[TRX]); |
| 78 | GPR[TRX] = (unsigned_word)(unsigned32)(GPR[TRX]); |
| 79 | TRACE_ALU_RESULT (GPR[TRX]); |
| 80 | } |
| 81 | |
| 82 | |
| 83 | 11101,3.RX,100,00000:RR:16::JRC |
| 84 | "jrc r<TRX>" |
| 85 | *mips16e: |
| 86 | { |
| 87 | NIA = GPR[TRX]; |
| 88 | } |
| 89 | |
| 90 | |
| 91 | 11101,000,101,00000:RR:16::JRCRA |
| 92 | "jrc ra" |
| 93 | *mips16e: |
| 94 | { |
| 95 | NIA = RA; |
| 96 | } |
| 97 | |
| 98 | |
| 99 | 11101,3.RX,110,00000:RR:16::JALRC |
| 100 | "jalrc r<TRX>" |
| 101 | *mips16e: |
| 102 | { |
| 103 | RA = NIA; |
| 104 | NIA = GPR[TRX]; |
| 105 | } |
| 106 | |
| 107 | |
| 108 | // format routines for save/restore |
| 109 | :%s::::RAS:int ras |
| 110 | *mips16e |
| 111 | { |
| 112 | static char buf[10]; |
| 113 | buf[0] = '\0'; |
| 114 | if (ras & 4) |
| 115 | strcat (buf,"ra,"); |
| 116 | if (ras & 2) |
| 117 | strcat (buf,"s0,"); |
| 118 | if (ras & 1) |
| 119 | strcat (buf,"s1,"); |
| 120 | return (buf); |
| 121 | } |
| 122 | |
| 123 | :%s::::XSREGS:int xsregs |
| 124 | *mips16e |
| 125 | { |
| 126 | if (xsregs > 6) |
| 127 | return "s2,s3,s4,s5,s6,s7,s8,"; |
| 128 | if (xsregs > 5) |
| 129 | return "s2,s3,s4,s5,s6,s7,"; |
| 130 | if (xsregs > 4) |
| 131 | return "s2,s3,s4,s5,s6,"; |
| 132 | if (xsregs > 3) |
| 133 | return "s2,s3,s4,s5,"; |
| 134 | if (xsregs > 2) |
| 135 | return "s2,s3,s4,"; |
| 136 | if (xsregs > 1) |
| 137 | return "s2,s3,"; |
| 138 | if (xsregs > 0) |
| 139 | return "s2,"; |
| 140 | return ""; |
| 141 | } |
| 142 | |
| 143 | :%s::::AREGS:int aregs |
| 144 | *mips16e |
| 145 | { |
| 146 | // Fixme: how is the arg/static distinction made by the assembler? |
| 147 | static const char * const aregstr[16] = { |
| 148 | "", |
| 149 | "A3,", |
| 150 | "A2,A3,", |
| 151 | "A1,A2,A3,", |
| 152 | "A0,A1,A2,A3,", |
| 153 | "a0,", |
| 154 | "a0,A3,", |
| 155 | "a0,A2,A3,", |
| 156 | "a0,A1,A2,A3,", |
| 157 | "a0,a1,", |
| 158 | "a0,a1,A3,", |
| 159 | "a0,a1,A2,A3,", |
| 160 | "a0,a1,a2,", |
| 161 | "a0,a1,a2,A3,", |
| 162 | "?," |
| 163 | }; |
| 164 | return aregstr[aregs]; |
| 165 | } |
| 166 | |
| 167 | :compute:::int:SFRAME:FS:((FS == 0) ? 128 \: (FS << 3)) |
| 168 | :compute:::int:BFRAME:FSHI,FSLO:(((FSHI << 4) | FSLO) << 3) |
| 169 | |
| 170 | :function:::void:do_save:int xsregs, int aregs, int ras0s1, int framesize |
| 171 | { |
| 172 | unsigned_word temp; |
| 173 | int args, astatic; |
| 174 | |
| 175 | temp = GPR[29]; |
| 176 | |
| 177 | /* writes are in the same order as the hardware description... */ |
| 178 | switch (aregs) { |
| 179 | case 0: case 1: case 2: case 3: case 11: |
| 180 | args = 0; |
| 181 | break; |
| 182 | case 4: case 5: case 6: case 7: |
| 183 | args = 1; |
| 184 | break; |
| 185 | case 8: case 9: case 10: |
| 186 | args = 2; |
| 187 | break; |
| 188 | case 12: case 13: |
| 189 | args = 3; |
| 190 | break; |
| 191 | case 14: |
| 192 | args = 4; |
| 193 | break; |
| 194 | default: |
| 195 | sim_engine_abort (SD, CPU, CIA, "save: aregs=%d causes unpredictable results\n", aregs); |
| 196 | } |
| 197 | if (args > 0) { |
| 198 | do_store (SD_, AccessLength_WORD, temp, 0, GPR[4]); |
| 199 | if (args > 1) { |
| 200 | do_store (SD_,AccessLength_WORD, temp, 4 , GPR[5]); |
| 201 | if (args > 2) { |
| 202 | do_store (SD_,AccessLength_WORD, temp, 8 , GPR[6]); |
| 203 | if (args > 3) { |
| 204 | do_store (SD_,AccessLength_WORD, temp, 12, GPR[7]); |
| 205 | } |
| 206 | } |
| 207 | } |
| 208 | } |
| 209 | |
| 210 | if (ras0s1 & 4) |
| 211 | do_store (SD_,AccessLength_WORD, temp -= 4, 0, GPR[31]); |
| 212 | |
| 213 | switch (xsregs) { |
| 214 | case 7: |
| 215 | do_store (SD_,AccessLength_WORD, temp -= 4, 0, GPR[30]); |
| 216 | case 6: |
| 217 | do_store (SD_,AccessLength_WORD, temp -= 4, 0, GPR[23]); |
| 218 | case 5: |
| 219 | do_store (SD_,AccessLength_WORD, temp -= 4, 0, GPR[22]); |
| 220 | case 4: |
| 221 | do_store (SD_,AccessLength_WORD, temp -= 4, 0, GPR[21]); |
| 222 | case 3: |
| 223 | do_store (SD_,AccessLength_WORD, temp -= 4, 0, GPR[20]); |
| 224 | case 2: |
| 225 | do_store (SD_,AccessLength_WORD, temp -= 4, 0, GPR[19]); |
| 226 | case 1: |
| 227 | do_store (SD_,AccessLength_WORD, temp -= 4, 0, GPR[18]); |
| 228 | } |
| 229 | |
| 230 | if (ras0s1 & 1) |
| 231 | do_store (SD_,AccessLength_WORD, temp -= 4, 0, GPR[17]); |
| 232 | if (ras0s1 & 2) |
| 233 | do_store (SD_,AccessLength_WORD, temp -= 4, 0, GPR[16]); |
| 234 | |
| 235 | switch (aregs) { |
| 236 | case 0: case 4: case 8: case 12: case 14: |
| 237 | astatic = 0; |
| 238 | break; |
| 239 | case 1: case 5: case 9: case 13: |
| 240 | astatic = 1; |
| 241 | break; |
| 242 | case 2: case 6: case 10: |
| 243 | astatic = 2; |
| 244 | break; |
| 245 | case 3: case 7: |
| 246 | astatic = 3; |
| 247 | break; |
| 248 | case 11: |
| 249 | astatic = 4; |
| 250 | break; |
| 251 | default: |
| 252 | sim_engine_abort (SD, CPU, CIA, "save: aregs=%d causes unpredictable results\n", aregs); |
| 253 | } |
| 254 | if (astatic > 0) { |
| 255 | do_store (SD_, AccessLength_WORD, temp -= 4, 0, GPR[7]); |
| 256 | if (astatic > 1) { |
| 257 | do_store (SD_, AccessLength_WORD, temp -= 4, 0, GPR[6]); |
| 258 | if (astatic > 2) { |
| 259 | do_store (SD_, AccessLength_WORD, temp -= 4, 0, GPR[5]); |
| 260 | if (astatic > 3) { |
| 261 | do_store (SD_, AccessLength_WORD, temp -= 4, 0, GPR[4]); |
| 262 | } |
| 263 | } |
| 264 | } |
| 265 | } |
| 266 | |
| 267 | GPR[29] -= framesize; |
| 268 | } |
| 269 | |
| 270 | 01100,100,1,3.RAS,4.FS:I8:16::SAVE |
| 271 | "save %s<RAS>,<SFRAME>" |
| 272 | *mips16e |
| 273 | { |
| 274 | do_save (SD_, 0, 0, RAS, SFRAME); |
| 275 | } |
| 276 | |
| 277 | |
| 278 | 11110,3.XSREGS,4.FSHI,4.AREGS + 01100,100,1,3.RAS,4.FSLO:EXT-I8:16::SAVE |
| 279 | "save %s<RAS>%s<XSREGS>%s<AREGS><BFRAME>" |
| 280 | *mips16e |
| 281 | { |
| 282 | do_save (SD_, XSREGS, AREGS, RAS, BFRAME); |
| 283 | } |
| 284 | |
| 285 | |
| 286 | :function:::void:do_restore:int xsregs, int aregs, int ras0s1, int framesize |
| 287 | *mips16e |
| 288 | { |
| 289 | unsigned_word temp, temp2; |
| 290 | int astatic; |
| 291 | |
| 292 | temp = GPR[29] + framesize; |
| 293 | temp2 = temp; |
| 294 | |
| 295 | /* reads are in the same order as the hardware description... */ |
| 296 | |
| 297 | if (ras0s1 & 4) |
| 298 | GPR[31] = EXTEND32 (do_load(SD_, AccessLength_WORD, temp -= 4, 0)); |
| 299 | |
| 300 | switch (xsregs) { |
| 301 | case 7: |
| 302 | GPR[30] = EXTEND32 (do_load (SD_,AccessLength_WORD, temp -= 4, 0)); |
| 303 | case 6: |
| 304 | GPR[23] = EXTEND32 (do_load (SD_,AccessLength_WORD, temp -= 4, 0)); |
| 305 | case 5: |
| 306 | GPR[22] = EXTEND32 (do_load (SD_,AccessLength_WORD, temp -= 4, 0)); |
| 307 | case 4: |
| 308 | GPR[21] = EXTEND32 (do_load (SD_,AccessLength_WORD, temp -= 4, 0)); |
| 309 | case 3: |
| 310 | GPR[20] = EXTEND32 (do_load (SD_,AccessLength_WORD, temp -= 4, 0)); |
| 311 | case 2: |
| 312 | GPR[19] = EXTEND32 (do_load (SD_,AccessLength_WORD, temp -= 4, 0)); |
| 313 | case 1: |
| 314 | GPR[18] = EXTEND32 (do_load (SD_,AccessLength_WORD, temp -= 4, 0)); |
| 315 | } |
| 316 | |
| 317 | if (ras0s1 & 1) |
| 318 | GPR[17] = EXTEND32 (do_load (SD_,AccessLength_WORD, temp -= 4, 0)); |
| 319 | if (ras0s1 & 2) |
| 320 | GPR[16] = EXTEND32 (do_load (SD_,AccessLength_WORD, temp -= 4, 0)); |
| 321 | |
| 322 | switch (aregs) { |
| 323 | case 0: case 4: case 8: case 12: case 14: |
| 324 | astatic = 0; |
| 325 | break; |
| 326 | case 1: case 5: case 9: case 13: |
| 327 | astatic = 1; |
| 328 | break; |
| 329 | case 2: case 6: case 10: |
| 330 | astatic = 2; |
| 331 | break; |
| 332 | case 3: case 7: |
| 333 | astatic = 3; |
| 334 | break; |
| 335 | case 11: |
| 336 | astatic = 4; |
| 337 | break; |
| 338 | default: |
| 339 | sim_engine_abort (SD, CPU, CIA, "save: aregs=%d causes unpredictable results\n", aregs); |
| 340 | } |
| 341 | if (astatic > 0) { |
| 342 | GPR[7] = EXTEND32 (do_load (SD_,AccessLength_WORD, temp -= 4, 0)); |
| 343 | if (astatic > 1) { |
| 344 | GPR[6] = EXTEND32 (do_load (SD_,AccessLength_WORD, temp -= 4, 0)); |
| 345 | if (astatic > 2) { |
| 346 | GPR[5] = EXTEND32 (do_load (SD_,AccessLength_WORD, temp -= 4, 0)); |
| 347 | if (astatic > 3) { |
| 348 | GPR[4] = EXTEND32 (do_load (SD_,AccessLength_WORD, temp -= 4, 0)); |
| 349 | } |
| 350 | } |
| 351 | } |
| 352 | } |
| 353 | |
| 354 | GPR[29] = temp2; |
| 355 | } |
| 356 | |
| 357 | 01100,100,0,3.RAS,4.FS:I8:16::RESTORE |
| 358 | "restore %s<RAS>,<SFRAME>" |
| 359 | *mips16e |
| 360 | { |
| 361 | do_restore (SD_,0,0,RAS,SFRAME); |
| 362 | } |
| 363 | |
| 364 | 11110,3.XSREGS,4.FSHI,4.AREGS + 01100,100,0,3.RAS,4.FSLO:EXT-I8:16::RESTORE |
| 365 | "restore %s<RAS>%s<XSREGS>%s<AREGS><BFRAME>" |
| 366 | *mips16e |
| 367 | { |
| 368 | do_restore (SD_,XSREGS,AREGS,RAS,BFRAME); |
| 369 | } |