src/arch/arm/isa/insts/misc.isa

   1 // -*- mode:c++ -*-
   2
   3 // Copyright (c) 2010 ARM Limited
   4 // All rights reserved
   5 //
   6 // The license below extends only to copyright in the software and shall
   7 // not be construed as granting a license to any other intellectual
   8 // property including but not limited to intellectual property relating
   9 // to a hardware implementation of the functionality of the software
  10 // licensed hereunder.  You may use the software subject to the license
  11 // terms below provided that you ensure that this notice is replicated
  12 // unmodified and in its entirety in all distributions of the software,
  13 // modified or unmodified, in source code or in binary form.
  14 //
  15 // Redistribution and use in source and binary forms, with or without
  16 // modification, are permitted provided that the following conditions are
  17 // met: redistributions of source code must retain the above copyright
  18 // notice, this list of conditions and the following disclaimer;
  19 // redistributions in binary form must reproduce the above copyright
  20 // notice, this list of conditions and the following disclaimer in the
  21 // documentation and/or other materials provided with the distribution;
  22 // neither the name of the copyright holders nor the names of its
  23 // contributors may be used to endorse or promote products derived from
  24 // this software without specific prior written permission.
  25 //
  26 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  27 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  28 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  29 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  30 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  31 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  32 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  33 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  34 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  35 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  36 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  37 //
  38 // Authors: Gabe Black
  39
  40 let {{
  41
  42     svcCode = '''
  43 #if FULL_SYSTEM
  44     fault = new SupervisorCall;
  45 #else
  46     fault = new SupervisorCall(machInst);
  47 #endif
  48     '''
  49
  50     svcIop = InstObjParams("svc", "Svc", "PredOp",
  51                            { "code": svcCode,
  52                              "predicate_test": predicateTest }, ["IsSyscall"])
  53     header_output = BasicDeclare.subst(svcIop)
  54     decoder_output = BasicConstructor.subst(svcIop)
  55     exec_output = PredOpExecute.subst(svcIop)
  56
  57 }};
  58
  59 let {{
  60
  61     header_output = decoder_output = exec_output = ""
  62
  63     mrsCpsrCode = "Dest = (Cpsr | CondCodes) & 0xF8FF03DF"
  64     mrsCpsrIop = InstObjParams("mrs", "MrsCpsr", "MrsOp",
  65                                { "code": mrsCpsrCode,
  66                                  "predicate_test": predicateTest }, [])
  67     header_output += MrsDeclare.subst(mrsCpsrIop)
  68     decoder_output += MrsConstructor.subst(mrsCpsrIop)
  69     exec_output += PredOpExecute.subst(mrsCpsrIop)
  70
  71     mrsSpsrCode = "Dest = Spsr"
  72     mrsSpsrIop = InstObjParams("mrs", "MrsSpsr", "MrsOp",
  73                                { "code": mrsSpsrCode,
  74                                  "predicate_test": predicateTest }, [])
  75     header_output += MrsDeclare.subst(mrsSpsrIop)
  76     decoder_output += MrsConstructor.subst(mrsSpsrIop)
  77     exec_output += PredOpExecute.subst(mrsSpsrIop)
  78
  79     msrCpsrRegCode = '''
  80         SCTLR sctlr = Sctlr;
  81         uint32_t newCpsr =
  82             cpsrWriteByInstr(Cpsr | CondCodes, Op1, byteMask, false, sctlr.nmfi);
  83         Cpsr = ~CondCodesMask & newCpsr;
  84         CondCodes = CondCodesMask & newCpsr;
  85     '''
  86     msrCpsrRegIop = InstObjParams("msr", "MsrCpsrReg", "MsrRegOp",
  87                                   { "code": msrCpsrRegCode,
  88                                     "predicate_test": predicateTest }, [])
  89     header_output += MsrRegDeclare.subst(msrCpsrRegIop)
  90     decoder_output += MsrRegConstructor.subst(msrCpsrRegIop)
  91     exec_output += PredOpExecute.subst(msrCpsrRegIop)
  92
  93     msrSpsrRegCode = "Spsr = spsrWriteByInstr(Spsr, Op1, byteMask, false);"
  94     msrSpsrRegIop = InstObjParams("msr", "MsrSpsrReg", "MsrRegOp",
  95                                   { "code": msrSpsrRegCode,
  96                                     "predicate_test": predicateTest }, [])
  97     header_output += MsrRegDeclare.subst(msrSpsrRegIop)
  98     decoder_output += MsrRegConstructor.subst(msrSpsrRegIop)
  99     exec_output += PredOpExecute.subst(msrSpsrRegIop)
 100
 101     msrCpsrImmCode = '''
 102         SCTLR sctlr = Sctlr;
 103         uint32_t newCpsr =
 104             cpsrWriteByInstr(Cpsr | CondCodes, imm, byteMask, false, sctlr.nmfi);
 105         Cpsr = ~CondCodesMask & newCpsr;
 106         CondCodes = CondCodesMask & newCpsr;
 107     '''
 108     msrCpsrImmIop = InstObjParams("msr", "MsrCpsrImm", "MsrImmOp",
 109                                   { "code": msrCpsrImmCode,
 110                                     "predicate_test": predicateTest }, [])
 111     header_output += MsrImmDeclare.subst(msrCpsrImmIop)
 112     decoder_output += MsrImmConstructor.subst(msrCpsrImmIop)
 113     exec_output += PredOpExecute.subst(msrCpsrImmIop)
 114
 115     msrSpsrImmCode = "Spsr = spsrWriteByInstr(Spsr, imm, byteMask, false);"
 116     msrSpsrImmIop = InstObjParams("msr", "MsrSpsrImm", "MsrImmOp",
 117                                   { "code": msrSpsrImmCode,
 118                                     "predicate_test": predicateTest }, [])
 119     header_output += MsrImmDeclare.subst(msrSpsrImmIop)
 120     decoder_output += MsrImmConstructor.subst(msrSpsrImmIop)
 121     exec_output += PredOpExecute.subst(msrSpsrImmIop)
 122
 123     revCode = '''
 124     uint32_t val = Op1;
 125     Dest = swap_byte(val);
 126     '''
 127     revIop = InstObjParams("rev", "Rev", "RegRegOp",
 128                            { "code": revCode,
 129                              "predicate_test": predicateTest }, [])
 130     header_output += RegRegOpDeclare.subst(revIop)
 131     decoder_output += RegRegOpConstructor.subst(revIop)
 132     exec_output += PredOpExecute.subst(revIop)
 133
 134     rev16Code = '''
 135     uint32_t val = Op1;
 136     Dest = (bits(val, 15, 8) << 0) |
 137            (bits(val, 7, 0) << 8) |
 138            (bits(val, 31, 24) << 16) |
 139            (bits(val, 23, 16) << 24);
 140     '''
 141     rev16Iop = InstObjParams("rev16", "Rev16", "RegRegOp",
 142                              { "code": rev16Code,
 143                                "predicate_test": predicateTest }, [])
 144     header_output += RegRegOpDeclare.subst(rev16Iop)
 145     decoder_output += RegRegOpConstructor.subst(rev16Iop)
 146     exec_output += PredOpExecute.subst(rev16Iop)
 147
 148     revshCode = '''
 149     uint16_t val = Op1;
 150     Dest = sext<16>(swap_byte(val));
 151     '''
 152     revshIop = InstObjParams("revsh", "Revsh", "RegRegOp",
 153                              { "code": revshCode,
 154                                "predicate_test": predicateTest }, [])
 155     header_output += RegRegOpDeclare.subst(revshIop)
 156     decoder_output += RegRegOpConstructor.subst(revshIop)
 157     exec_output += PredOpExecute.subst(revshIop)
 158
 159     rbitCode = '''
 160     uint8_t *opBytes = (uint8_t *)&Op1;
 161     uint32_t resTemp;
 162     uint8_t *destBytes = (uint8_t *)&resTemp;
 163     // This reverses the bytes and bits of the input, or so says the
 164     // internet.
 165     for (int i = 0; i < 4; i++) {
 166         uint32_t temp = opBytes[i];
 167         temp = (temp * 0x0802 & 0x22110) | (temp * 0x8020 & 0x88440);
 168         destBytes[3 - i] = (temp * 0x10101) >> 16;
 169     }
 170     Dest = resTemp;
 171     '''
 172     rbitIop = InstObjParams("rbit", "Rbit", "RegRegOp",
 173                             { "code": rbitCode,
 174                               "predicate_test": predicateTest }, [])
 175     header_output += RegRegOpDeclare.subst(rbitIop)
 176     decoder_output += RegRegOpConstructor.subst(rbitIop)
 177     exec_output += PredOpExecute.subst(rbitIop)
 178
 179     clzCode = '''
 180         Dest = (Op1 == 0) ? 32 : (31 - findMsbSet(Op1));
 181     '''
 182     clzIop = InstObjParams("clz", "Clz", "RegRegOp",
 183                            { "code": clzCode,
 184                              "predicate_test": predicateTest }, [])
 185     header_output += RegRegOpDeclare.subst(clzIop)
 186     decoder_output += RegRegOpConstructor.subst(clzIop)
 187     exec_output += PredOpExecute.subst(clzIop)
 188
 189     ssatCode = '''
 190         int32_t operand = shift_rm_imm(Op1, shiftAmt, shiftType, 0);
 191         int32_t res;
 192         if (satInt(res, operand, imm))
 193             CondCodes = CondCodes | (1 << 27);
 194         else
 195             CondCodes = CondCodes;
 196         Dest = res;
 197     '''
 198     ssatIop = InstObjParams("ssat", "Ssat", "RegImmRegShiftOp",
 199                             { "code": ssatCode,
 200                               "predicate_test": predicateTest }, [])
 201     header_output += RegImmRegShiftOpDeclare.subst(ssatIop)
 202     decoder_output += RegImmRegShiftOpConstructor.subst(ssatIop)
 203     exec_output += PredOpExecute.subst(ssatIop)
 204
 205     usatCode = '''
 206         int32_t operand = shift_rm_imm(Op1, shiftAmt, shiftType, 0);
 207         int32_t res;
 208         if (uSatInt(res, operand, imm))
 209             CondCodes = CondCodes | (1 << 27);
 210         else
 211             CondCodes = CondCodes;
 212         Dest = res;
 213     '''
 214     usatIop = InstObjParams("usat", "Usat", "RegImmRegShiftOp",
 215                             { "code": usatCode,
 216                               "predicate_test": predicateTest }, [])
 217     header_output += RegImmRegShiftOpDeclare.subst(usatIop)
 218     decoder_output += RegImmRegShiftOpConstructor.subst(usatIop)
 219     exec_output += PredOpExecute.subst(usatIop)
 220
 221     ssat16Code = '''
 222         int32_t res;
 223         uint32_t resTemp = 0;
 224         CondCodes = CondCodes;
 225         int32_t argLow = sext<16>(bits(Op1, 15, 0));
 226         int32_t argHigh = sext<16>(bits(Op1, 31, 16));
 227         if (satInt(res, argLow, imm))
 228             CondCodes = CondCodes | (1 << 27);
 229         replaceBits(resTemp, 15, 0, res);
 230         if (satInt(res, argHigh, imm))
 231             CondCodes = CondCodes | (1 << 27);
 232         replaceBits(resTemp, 31, 16, res);
 233         Dest = resTemp;
 234     '''
 235     ssat16Iop = InstObjParams("ssat16", "Ssat16", "RegImmRegOp",
 236                               { "code": ssat16Code,
 237                                 "predicate_test": predicateTest }, [])
 238     header_output += RegImmRegOpDeclare.subst(ssat16Iop)
 239     decoder_output += RegImmRegOpConstructor.subst(ssat16Iop)
 240     exec_output += PredOpExecute.subst(ssat16Iop)
 241
 242     usat16Code = '''
 243         int32_t res;
 244         uint32_t resTemp = 0;
 245         CondCodes = CondCodes;
 246         int32_t argLow = sext<16>(bits(Op1, 15, 0));
 247         int32_t argHigh = sext<16>(bits(Op1, 31, 16));
 248         if (uSatInt(res, argLow, imm))
 249             CondCodes = CondCodes | (1 << 27);
 250         replaceBits(resTemp, 15, 0, res);
 251         if (uSatInt(res, argHigh, imm))
 252             CondCodes = CondCodes | (1 << 27);
 253         replaceBits(resTemp, 31, 16, res);
 254         Dest = resTemp;
 255     '''
 256     usat16Iop = InstObjParams("usat16", "Usat16", "RegImmRegOp",
 257                               { "code": usat16Code,
 258                                 "predicate_test": predicateTest }, [])
 259     header_output += RegImmRegOpDeclare.subst(usat16Iop)
 260     decoder_output += RegImmRegOpConstructor.subst(usat16Iop)
 261     exec_output += PredOpExecute.subst(usat16Iop)
 262
 263     sxtbIop = InstObjParams("sxtb", "Sxtb", "RegImmRegOp",
 264                             { "code":
 265                               "Dest = sext<8>((uint8_t)(Op1.ud >> imm));",
 266                               "predicate_test": predicateTest }, [])
 267     header_output += RegImmRegOpDeclare.subst(sxtbIop)
 268     decoder_output += RegImmRegOpConstructor.subst(sxtbIop)
 269     exec_output += PredOpExecute.subst(sxtbIop)
 270
 271     sxtabIop = InstObjParams("sxtab", "Sxtab", "RegRegRegImmOp",
 272                              { "code":
 273                                '''
 274                                    Dest = sext<8>((uint8_t)(Op2.ud >> imm)) +
 275                                           Op1;
 276                                ''',
 277                                "predicate_test": predicateTest }, [])
 278     header_output += RegRegRegImmOpDeclare.subst(sxtabIop)
 279     decoder_output += RegRegRegImmOpConstructor.subst(sxtabIop)
 280     exec_output += PredOpExecute.subst(sxtabIop)
 281
 282     sxtb16Code = '''
 283     uint32_t resTemp = 0;
 284     replaceBits(resTemp, 15, 0, sext<8>(bits(Op1, imm + 7, imm)));
 285     replaceBits(resTemp, 31, 16,
 286                 sext<8>(bits(Op1, (imm + 23) % 32, (imm + 16) % 32)));
 287     Dest = resTemp;
 288     '''
 289     sxtb16Iop = InstObjParams("sxtb16", "Sxtb16", "RegImmRegOp",
 290                               { "code": sxtb16Code,
 291                                 "predicate_test": predicateTest }, [])
 292     header_output += RegImmRegOpDeclare.subst(sxtb16Iop)
 293     decoder_output += RegImmRegOpConstructor.subst(sxtb16Iop)
 294     exec_output += PredOpExecute.subst(sxtb16Iop)
 295
 296     sxtab16Code = '''
 297     uint32_t resTemp = 0;
 298     replaceBits(resTemp, 15, 0, sext<8>(bits(Op2, imm + 7, imm)) +
 299                                         bits(Op1, 15, 0));
 300     replaceBits(resTemp, 31, 16,
 301                 sext<8>(bits(Op2, (imm + 23) % 32, (imm + 16) % 32)) +
 302                 bits(Op1, 31, 16));
 303     Dest = resTemp;
 304     '''
 305     sxtab16Iop = InstObjParams("sxtab16", "Sxtab16", "RegRegRegImmOp",
 306                                { "code": sxtab16Code,
 307                                  "predicate_test": predicateTest }, [])
 308     header_output += RegRegRegImmOpDeclare.subst(sxtab16Iop)
 309     decoder_output += RegRegRegImmOpConstructor.subst(sxtab16Iop)
 310     exec_output += PredOpExecute.subst(sxtab16Iop)
 311
 312     sxthCode = '''
 313     uint64_t rotated = (uint32_t)Op1;
 314     rotated = (rotated | (rotated << 32)) >> imm;
 315     Dest = sext<16>((uint16_t)rotated);
 316     '''
 317     sxthIop = InstObjParams("sxth", "Sxth", "RegImmRegOp",
 318                               { "code": sxthCode,
 319                                 "predicate_test": predicateTest }, [])
 320     header_output += RegImmRegOpDeclare.subst(sxthIop)
 321     decoder_output += RegImmRegOpConstructor.subst(sxthIop)
 322     exec_output += PredOpExecute.subst(sxthIop)
 323
 324     sxtahCode = '''
 325     uint64_t rotated = (uint32_t)Op2;
 326     rotated = (rotated | (rotated << 32)) >> imm;
 327     Dest = sext<16>((uint16_t)rotated) + Op1;
 328     '''
 329     sxtahIop = InstObjParams("sxtah", "Sxtah", "RegRegRegImmOp",
 330                              { "code": sxtahCode,
 331                                "predicate_test": predicateTest }, [])
 332     header_output += RegRegRegImmOpDeclare.subst(sxtahIop)
 333     decoder_output += RegRegRegImmOpConstructor.subst(sxtahIop)
 334     exec_output += PredOpExecute.subst(sxtahIop)
 335
 336     uxtbIop = InstObjParams("uxtb", "Uxtb", "RegImmRegOp",
 337                             { "code": "Dest = (uint8_t)(Op1.ud >> imm);",
 338                               "predicate_test": predicateTest }, [])
 339     header_output += RegImmRegOpDeclare.subst(uxtbIop)
 340     decoder_output += RegImmRegOpConstructor.subst(uxtbIop)
 341     exec_output += PredOpExecute.subst(uxtbIop)
 342
 343     uxtabIop = InstObjParams("uxtab", "Uxtab", "RegRegRegImmOp",
 344                              { "code":
 345                                "Dest = (uint8_t)(Op2.ud >> imm) + Op1;",
 346                                "predicate_test": predicateTest }, [])
 347     header_output += RegRegRegImmOpDeclare.subst(uxtabIop)
 348     decoder_output += RegRegRegImmOpConstructor.subst(uxtabIop)
 349     exec_output += PredOpExecute.subst(uxtabIop)
 350
 351     uxtb16Code = '''
 352     uint32_t resTemp = 0;
 353     replaceBits(resTemp, 15, 0, (uint8_t)(bits(Op1, imm + 7, imm)));
 354     replaceBits(resTemp, 31, 16,
 355                 (uint8_t)(bits(Op1, (imm + 23) % 32, (imm + 16) % 32)));
 356     Dest = resTemp;
 357     '''
 358     uxtb16Iop = InstObjParams("uxtb16", "Uxtb16", "RegImmRegOp",
 359                               { "code": uxtb16Code,
 360                                 "predicate_test": predicateTest }, [])
 361     header_output += RegImmRegOpDeclare.subst(uxtb16Iop)
 362     decoder_output += RegImmRegOpConstructor.subst(uxtb16Iop)
 363     exec_output += PredOpExecute.subst(uxtb16Iop)
 364
 365     uxtab16Code = '''
 366     uint32_t resTemp = 0;
 367     replaceBits(resTemp, 15, 0, (uint8_t)(bits(Op2, imm + 7, imm)) +
 368                                         bits(Op1, 15, 0));
 369     replaceBits(resTemp, 31, 16,
 370                 (uint8_t)(bits(Op2, (imm + 23) % 32, (imm + 16) % 32)) +
 371                 bits(Op1, 31, 16));
 372     Dest = resTemp;
 373     '''
 374     uxtab16Iop = InstObjParams("uxtab16", "Uxtab16", "RegRegRegImmOp",
 375                                { "code": uxtab16Code,
 376                                  "predicate_test": predicateTest }, [])
 377     header_output += RegRegRegImmOpDeclare.subst(uxtab16Iop)
 378     decoder_output += RegRegRegImmOpConstructor.subst(uxtab16Iop)
 379     exec_output += PredOpExecute.subst(uxtab16Iop)
 380
 381     uxthCode = '''
 382     uint64_t rotated = (uint32_t)Op1;
 383     rotated = (rotated | (rotated << 32)) >> imm;
 384     Dest = (uint16_t)rotated;
 385     '''
 386     uxthIop = InstObjParams("uxth", "Uxth", "RegImmRegOp",
 387                               { "code": uxthCode,
 388                                 "predicate_test": predicateTest }, [])
 389     header_output += RegImmRegOpDeclare.subst(uxthIop)
 390     decoder_output += RegImmRegOpConstructor.subst(uxthIop)
 391     exec_output += PredOpExecute.subst(uxthIop)
 392
 393     uxtahCode = '''
 394     uint64_t rotated = (uint32_t)Op2;
 395     rotated = (rotated | (rotated << 32)) >> imm;
 396     Dest = (uint16_t)rotated + Op1;
 397     '''
 398     uxtahIop = InstObjParams("uxtah", "Uxtah", "RegRegRegImmOp",
 399                              { "code": uxtahCode,
 400                                "predicate_test": predicateTest }, [])
 401     header_output += RegRegRegImmOpDeclare.subst(uxtahIop)
 402     decoder_output += RegRegRegImmOpConstructor.subst(uxtahIop)
 403     exec_output += PredOpExecute.subst(uxtahIop)
 404
 405     selCode = '''
 406         uint32_t resTemp = 0;
 407         for (unsigned i = 0; i < 4; i++) {
 408             int low = i * 8;
 409             int high = low + 7;
 410             replaceBits(resTemp, high, low,
 411                         bits(CondCodes, 16 + i) ?
 412                             bits(Op1, high, low) : bits(Op2, high, low));
 413         }
 414         Dest = resTemp;
 415     '''
 416     selIop = InstObjParams("sel", "Sel", "RegRegRegOp",
 417                            { "code": selCode,
 418                              "predicate_test": predicateTest }, [])
 419     header_output += RegRegRegOpDeclare.subst(selIop)
 420     decoder_output += RegRegRegOpConstructor.subst(selIop)
 421     exec_output += PredOpExecute.subst(selIop)
 422
 423     usad8Code = '''
 424         uint32_t resTemp = 0;
 425         for (unsigned i = 0; i < 4; i++) {
 426             int low = i * 8;
 427             int high = low + 7;
 428             int32_t diff = bits(Op1, high, low) -
 429                            bits(Op2, high, low);
 430             resTemp += ((diff < 0) ? -diff : diff);
 431         }
 432         Dest = resTemp;
 433     '''
 434     usad8Iop = InstObjParams("usad8", "Usad8", "RegRegRegOp",
 435                              { "code": usad8Code,
 436                                "predicate_test": predicateTest }, [])
 437     header_output += RegRegRegOpDeclare.subst(usad8Iop)
 438     decoder_output += RegRegRegOpConstructor.subst(usad8Iop)
 439     exec_output += PredOpExecute.subst(usad8Iop)
 440
 441     usada8Code = '''
 442         uint32_t resTemp = 0;
 443         for (unsigned i = 0; i < 4; i++) {
 444             int low = i * 8;
 445             int high = low + 7;
 446             int32_t diff = bits(Op1, high, low) -
 447                            bits(Op2, high, low);
 448             resTemp += ((diff < 0) ? -diff : diff);
 449         }
 450         Dest = Op3 + resTemp;
 451     '''
 452     usada8Iop = InstObjParams("usada8", "Usada8", "RegRegRegRegOp",
 453                               { "code": usada8Code,
 454                                 "predicate_test": predicateTest }, [])
 455     header_output += RegRegRegRegOpDeclare.subst(usada8Iop)
 456     decoder_output += RegRegRegRegOpConstructor.subst(usada8Iop)
 457     exec_output += PredOpExecute.subst(usada8Iop)
 458
 459     bkptIop = InstObjParams("bkpt", "BkptInst", "ArmStaticInst",
 460             "return new PrefetchAbort(PC, ArmFault::DebugEvent);")
 461     header_output += BasicDeclare.subst(bkptIop)
 462     decoder_output += BasicConstructor.subst(bkptIop)
 463     exec_output += BasicExecute.subst(bkptIop)
 464
 465     nopIop = InstObjParams("nop", "NopInst", "PredOp", \
 466             { "code" : "", "predicate_test" : predicateTest })
 467     header_output += BasicDeclare.subst(nopIop)
 468     decoder_output += BasicConstructor.subst(nopIop)
 469     exec_output += PredOpExecute.subst(nopIop)
 470
 471     itIop = InstObjParams("it", "ItInst", "PredOp", \
 472             { "code" : "Itstate = machInst.newItstate;",
 473               "predicate_test" : predicateTest })
 474     header_output += BasicDeclare.subst(itIop)
 475     decoder_output += BasicConstructor.subst(itIop)
 476     exec_output += PredOpExecute.subst(itIop)
 477     unknownCode = '''
 478 #if FULL_SYSTEM
 479             return new UndefinedInstruction;
 480 #else
 481             return new UndefinedInstruction(machInst, true);
 482 #endif
 483     '''
 484     unknownIop = InstObjParams("unknown", "Unknown", "UnknownOp", \
 485                                { "code": unknownCode,
 486                                  "predicate_test": predicateTest })
 487     header_output += BasicDeclare.subst(unknownIop)
 488     decoder_output += BasicConstructor.subst(unknownIop)
 489     exec_output += PredOpExecute.subst(unknownIop)
 490
 491     ubfxCode = '''
 492         Dest = bits(Op1, imm2, imm1);
 493     '''
 494     ubfxIop = InstObjParams("ubfx", "Ubfx", "RegRegImmImmOp",
 495                             { "code": ubfxCode,
 496                               "predicate_test": predicateTest }, [])
 497     header_output += RegRegImmImmOpDeclare.subst(ubfxIop)
 498     decoder_output += RegRegImmImmOpConstructor.subst(ubfxIop)
 499     exec_output += PredOpExecute.subst(ubfxIop)
 500
 501     sbfxCode = '''
 502         int32_t resTemp = bits(Op1, imm2, imm1);
 503         Dest = resTemp | -(resTemp & (1 << (imm2 - imm1)));
 504     '''
 505     sbfxIop = InstObjParams("sbfx", "Sbfx", "RegRegImmImmOp",
 506                             { "code": sbfxCode,
 507                               "predicate_test": predicateTest }, [])
 508     header_output += RegRegImmImmOpDeclare.subst(sbfxIop)
 509     decoder_output += RegRegImmImmOpConstructor.subst(sbfxIop)
 510     exec_output += PredOpExecute.subst(sbfxIop)
 511
 512     bfcCode = '''
 513         Dest = Op1 & ~(mask(imm2 - imm1 + 1) << imm1);
 514     '''
 515     bfcIop = InstObjParams("bfc", "Bfc", "RegRegImmImmOp",
 516                            { "code": bfcCode,
 517                              "predicate_test": predicateTest }, [])
 518     header_output += RegRegImmImmOpDeclare.subst(bfcIop)
 519     decoder_output += RegRegImmImmOpConstructor.subst(bfcIop)
 520     exec_output += PredOpExecute.subst(bfcIop)
 521
 522     bfiCode = '''
 523         uint32_t bitMask = (mask(imm2 - imm1 + 1) << imm1);
 524         Dest = ((Op1 << imm1) & bitMask) | (Dest & ~bitMask);
 525     '''
 526     bfiIop = InstObjParams("bfi", "Bfi", "RegRegImmImmOp",
 527                            { "code": bfiCode,
 528                              "predicate_test": predicateTest }, [])
 529     header_output += RegRegImmImmOpDeclare.subst(bfiIop)
 530     decoder_output += RegRegImmImmOpConstructor.subst(bfiIop)
 531     exec_output += PredOpExecute.subst(bfiIop)
 532
 533     mrc15code = '''
 534     CPSR cpsr = Cpsr;
 535     if (cpsr.mode == MODE_USER)
 536 #if FULL_SYSTEM
 537         return new UndefinedInstruction;
 538 #else
 539         return new UndefinedInstruction(false, mnemonic);
 540 #endif
 541     Dest = MiscOp1;
 542     '''
 543
 544     mrc15Iop = InstObjParams("mrc", "Mrc15", "RegRegOp",
 545                              { "code": mrc15code,
 546                                "predicate_test": predicateTest }, [])
 547     header_output += RegRegOpDeclare.subst(mrc15Iop)
 548     decoder_output += RegRegOpConstructor.subst(mrc15Iop)
 549     exec_output += PredOpExecute.subst(mrc15Iop)
 550
 551
 552     mcr15code = '''
 553     CPSR cpsr = Cpsr;
 554     if (cpsr.mode == MODE_USER)
 555 #if FULL_SYSTEM
 556         return new UndefinedInstruction;
 557 #else
 558         return new UndefinedInstruction(false, mnemonic);
 559 #endif
 560     MiscDest = Op1;
 561     '''
 562     mcr15Iop = InstObjParams("mcr", "Mcr15", "RegRegOp",
 563                              { "code": mcr15code,
 564                                "predicate_test": predicateTest }, [])
 565     header_output += RegRegOpDeclare.subst(mcr15Iop)
 566     decoder_output += RegRegOpConstructor.subst(mcr15Iop)
 567     exec_output += PredOpExecute.subst(mcr15Iop)
 568
 569     enterxCode = '''
 570         FNPC = NPC | (1ULL << PcJBitShift) | (1ULL << PcTBitShift);
 571     '''
 572     enterxIop = InstObjParams("enterx", "Enterx", "PredOp",
 573                               { "code": enterxCode,
 574                                 "predicate_test": predicateTest }, [])
 575     header_output += BasicDeclare.subst(enterxIop)
 576     decoder_output += BasicConstructor.subst(enterxIop)
 577     exec_output += PredOpExecute.subst(enterxIop)
 578
 579     leavexCode = '''
 580         FNPC = (NPC & ~(1ULL << PcJBitShift)) | (1ULL << PcTBitShift);
 581     '''
 582     leavexIop = InstObjParams("leavex", "Leavex", "PredOp",
 583                               { "code": leavexCode,
 584                                 "predicate_test": predicateTest }, [])
 585     header_output += BasicDeclare.subst(leavexIop)
 586     decoder_output += BasicConstructor.subst(leavexIop)
 587     exec_output += PredOpExecute.subst(leavexIop)
 588
 589     setendCode = '''
 590         CPSR cpsr = Cpsr;
 591         cpsr.e = imm;
 592         Cpsr = cpsr;
 593     '''
 594     setendIop = InstObjParams("setend", "Setend", "ImmOp",
 595                               { "code": setendCode,
 596                                 "predicate_test": predicateTest }, [])
 597     header_output += ImmOpDeclare.subst(setendIop)
 598     decoder_output += ImmOpConstructor.subst(setendIop)
 599     exec_output += PredOpExecute.subst(setendIop)
 600
 601     cpsCode = '''
 602     uint32_t mode = bits(imm, 4, 0);
 603     uint32_t f = bits(imm, 5);
 604     uint32_t i = bits(imm, 6);
 605     uint32_t a = bits(imm, 7);
 606     bool setMode = bits(imm, 8);
 607     bool enable = bits(imm, 9);
 608     CPSR cpsr = Cpsr;
 609     SCTLR sctlr = Sctlr;
 610     if (cpsr.mode != MODE_USER) {
 611         if (enable) {
 612             if (f) cpsr.f = 0;
 613             if (i) cpsr.i = 0;
 614             if (a) cpsr.a = 0;
 615         } else {
 616             if (f && !sctlr.nmfi) cpsr.f = 1;
 617             if (i) cpsr.i = 1;
 618             if (a) cpsr.a = 1;
 619         }
 620         if (setMode) {
 621             cpsr.mode = mode;
 622         }
 623     }
 624     Cpsr = cpsr;
 625     '''
 626     cpsIop = InstObjParams("cps", "Cps", "ImmOp",
 627                            { "code": cpsCode,
 628                              "predicate_test": predicateTest }, [])
 629     header_output += ImmOpDeclare.subst(cpsIop)
 630     decoder_output += ImmOpConstructor.subst(cpsIop)
 631     exec_output += PredOpExecute.subst(cpsIop)
 632 }};