Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1 | // Copyright 2011 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5 | #if V8_TARGET_ARCH_MIPS64 |
| 6 | |
| 7 | #include "src/mips64/constants-mips64.h" |
| 8 | |
| 9 | namespace v8 { |
| 10 | namespace internal { |
| 11 | |
| 12 | |
| 13 | // ----------------------------------------------------------------------------- |
| 14 | // Registers. |
| 15 | |
| 16 | |
| 17 | // These register names are defined in a way to match the native disassembler |
| 18 | // formatting. See for example the command "objdump -d <binary file>". |
| 19 | const char* Registers::names_[kNumSimuRegisters] = { |
| 20 | "zero_reg", |
| 21 | "at", |
| 22 | "v0", "v1", |
| 23 | "a0", "a1", "a2", "a3", "a4", "a5", "a6", "a7", |
| 24 | "t0", "t1", "t2", "t3", |
| 25 | "s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7", |
| 26 | "t8", "t9", |
| 27 | "k0", "k1", |
| 28 | "gp", |
| 29 | "sp", |
| 30 | "fp", |
| 31 | "ra", |
| 32 | "LO", "HI", |
| 33 | "pc" |
| 34 | }; |
| 35 | |
| 36 | |
| 37 | // List of alias names which can be used when referring to MIPS registers. |
| 38 | const Registers::RegisterAlias Registers::aliases_[] = { |
| 39 | {0, "zero"}, |
| 40 | {23, "cp"}, |
| 41 | {30, "s8"}, |
| 42 | {30, "s8_fp"}, |
| 43 | {kInvalidRegister, NULL} |
| 44 | }; |
| 45 | |
| 46 | |
| 47 | const char* Registers::Name(int reg) { |
| 48 | const char* result; |
| 49 | if ((0 <= reg) && (reg < kNumSimuRegisters)) { |
| 50 | result = names_[reg]; |
| 51 | } else { |
| 52 | result = "noreg"; |
| 53 | } |
| 54 | return result; |
| 55 | } |
| 56 | |
| 57 | |
| 58 | int Registers::Number(const char* name) { |
| 59 | // Look through the canonical names. |
| 60 | for (int i = 0; i < kNumSimuRegisters; i++) { |
| 61 | if (strcmp(names_[i], name) == 0) { |
| 62 | return i; |
| 63 | } |
| 64 | } |
| 65 | |
| 66 | // Look through the alias names. |
| 67 | int i = 0; |
| 68 | while (aliases_[i].reg != kInvalidRegister) { |
| 69 | if (strcmp(aliases_[i].name, name) == 0) { |
| 70 | return aliases_[i].reg; |
| 71 | } |
| 72 | i++; |
| 73 | } |
| 74 | |
| 75 | // No register with the reguested name found. |
| 76 | return kInvalidRegister; |
| 77 | } |
| 78 | |
| 79 | |
| 80 | const char* FPURegisters::names_[kNumFPURegisters] = { |
| 81 | "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", "f8", "f9", "f10", "f11", |
| 82 | "f12", "f13", "f14", "f15", "f16", "f17", "f18", "f19", "f20", "f21", |
| 83 | "f22", "f23", "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31" |
| 84 | }; |
| 85 | |
| 86 | |
| 87 | // List of alias names which can be used when referring to MIPS registers. |
| 88 | const FPURegisters::RegisterAlias FPURegisters::aliases_[] = { |
| 89 | {kInvalidRegister, NULL} |
| 90 | }; |
| 91 | |
| 92 | |
| 93 | const char* FPURegisters::Name(int creg) { |
| 94 | const char* result; |
| 95 | if ((0 <= creg) && (creg < kNumFPURegisters)) { |
| 96 | result = names_[creg]; |
| 97 | } else { |
| 98 | result = "nocreg"; |
| 99 | } |
| 100 | return result; |
| 101 | } |
| 102 | |
| 103 | |
| 104 | int FPURegisters::Number(const char* name) { |
| 105 | // Look through the canonical names. |
| 106 | for (int i = 0; i < kNumFPURegisters; i++) { |
| 107 | if (strcmp(names_[i], name) == 0) { |
| 108 | return i; |
| 109 | } |
| 110 | } |
| 111 | |
| 112 | // Look through the alias names. |
| 113 | int i = 0; |
| 114 | while (aliases_[i].creg != kInvalidRegister) { |
| 115 | if (strcmp(aliases_[i].name, name) == 0) { |
| 116 | return aliases_[i].creg; |
| 117 | } |
| 118 | i++; |
| 119 | } |
| 120 | |
| 121 | // No Cregister with the reguested name found. |
| 122 | return kInvalidFPURegister; |
| 123 | } |
| 124 | |
| 125 | |
| 126 | // ----------------------------------------------------------------------------- |
| 127 | // Instructions. |
| 128 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 129 | bool Instruction::IsForbiddenAfterBranchInstr(Instr instr) { |
| 130 | Opcode opcode = static_cast<Opcode>(instr & kOpcodeMask); |
| 131 | switch (opcode) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 132 | case J: |
| 133 | case JAL: |
| 134 | case BEQ: |
| 135 | case BNE: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 136 | case BLEZ: // POP06 bgeuc/bleuc, blezalc, bgezalc |
| 137 | case BGTZ: // POP07 bltuc/bgtuc, bgtzalc, bltzalc |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 138 | case BEQL: |
| 139 | case BNEL: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 140 | case BLEZL: // POP26 bgezc, blezc, bgec/blec |
| 141 | case BGTZL: // POP27 bgtzc, bltzc, bltc/bgtc |
| 142 | case BC: |
| 143 | case BALC: |
| 144 | case POP10: // beqzalc, bovc, beqc |
| 145 | case POP30: // bnezalc, bnvc, bnec |
| 146 | case POP66: // beqzc, jic |
| 147 | case POP76: // bnezc, jialc |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 148 | return true; |
| 149 | case REGIMM: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 150 | switch (instr & kRtFieldMask) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 151 | case BLTZ: |
| 152 | case BGEZ: |
| 153 | case BLTZAL: |
| 154 | case BGEZAL: |
| 155 | return true; |
| 156 | default: |
| 157 | return false; |
| 158 | } |
| 159 | break; |
| 160 | case SPECIAL: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 161 | switch (instr & kFunctionFieldMask) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 162 | case JR: |
| 163 | case JALR: |
| 164 | return true; |
| 165 | default: |
| 166 | return false; |
| 167 | } |
| 168 | break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 169 | case COP1: |
| 170 | switch (instr & kRsFieldMask) { |
| 171 | case BC1: |
| 172 | case BC1EQZ: |
| 173 | case BC1NEZ: |
| 174 | return true; |
| 175 | break; |
| 176 | default: |
| 177 | return false; |
| 178 | } |
| 179 | break; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 180 | default: |
| 181 | return false; |
| 182 | } |
| 183 | } |
| 184 | |
| 185 | |
| 186 | bool Instruction::IsLinkingInstruction() const { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 187 | switch (OpcodeFieldRaw()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 188 | case JAL: |
| 189 | return true; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 190 | case POP76: |
| 191 | if (RsFieldRawNoAssert() == JIALC) |
| 192 | return true; // JIALC |
| 193 | else |
| 194 | return false; // BNEZC |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 195 | case REGIMM: |
| 196 | switch (RtFieldRaw()) { |
| 197 | case BGEZAL: |
| 198 | case BLTZAL: |
| 199 | return true; |
| 200 | default: |
| 201 | return false; |
| 202 | } |
| 203 | case SPECIAL: |
| 204 | switch (FunctionFieldRaw()) { |
| 205 | case JALR: |
| 206 | return true; |
| 207 | default: |
| 208 | return false; |
| 209 | } |
| 210 | default: |
| 211 | return false; |
| 212 | } |
| 213 | } |
| 214 | |
| 215 | |
| 216 | bool Instruction::IsTrap() const { |
| 217 | if (OpcodeFieldRaw() != SPECIAL) { |
| 218 | return false; |
| 219 | } else { |
| 220 | switch (FunctionFieldRaw()) { |
| 221 | case BREAK: |
| 222 | case TGE: |
| 223 | case TGEU: |
| 224 | case TLT: |
| 225 | case TLTU: |
| 226 | case TEQ: |
| 227 | case TNE: |
| 228 | return true; |
| 229 | default: |
| 230 | return false; |
| 231 | } |
| 232 | } |
| 233 | } |
| 234 | |
| 235 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 236 | } // namespace internal |
| 237 | } // namespace v8 |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 238 | |
| 239 | #endif // V8_TARGET_ARCH_MIPS64 |