1 /* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include "disassembler_mips.h" 18 19 #include <ostream> 20 #include <sstream> 21 22 #include "android-base/logging.h" 23 #include "android-base/stringprintf.h" 24 25 #include "base/bit_utils.h" 26 27 using android::base::StringPrintf; 28 29 namespace art { 30 namespace mips { 31 32 struct MipsInstruction { 33 uint32_t mask; 34 uint32_t value; 35 const char* name; 36 const char* args_fmt; 37 38 bool Matches(uint32_t instruction) const { 39 return (instruction & mask) == value; 40 } 41 }; 42 43 static const uint32_t kOpcodeShift = 26; 44 45 static const uint32_t kCop1 = (17 << kOpcodeShift); 46 static const uint32_t kMsa = (30 << kOpcodeShift); // MSA major opcode. 47 48 static const uint32_t kITypeMask = (0x3f << kOpcodeShift); 49 static const uint32_t kJTypeMask = (0x3f << kOpcodeShift); 50 static const uint32_t kRTypeMask = ((0x3f << kOpcodeShift) | (0x3f)); 51 static const uint32_t kSpecial0Mask = (0x3f << kOpcodeShift); 52 static const uint32_t kSpecial2Mask = (0x3f << kOpcodeShift); 53 static const uint32_t kSpecial3Mask = (0x3f << kOpcodeShift); 54 static const uint32_t kFpMask = kRTypeMask; 55 static const uint32_t kMsaMask = kRTypeMask; 56 static const uint32_t kMsaSpecialMask = (0x3f << kOpcodeShift); 57 58 static const MipsInstruction gMipsInstructions[] = { 59 // "sll r0, r0, 0" is the canonical "nop", used in delay slots. 60 { 0xffffffff, 0, "nop", "" }, 61 62 // R-type instructions. 63 { kRTypeMask, 0, "sll", "DTA", }, 64 // 0, 1, movci 65 { kRTypeMask | (0x1f << 21), 2, "srl", "DTA", }, 66 { kRTypeMask, 3, "sra", "DTA", }, 67 { kRTypeMask | (0x1f << 6), 4, "sllv", "DTS", }, 68 { kRTypeMask | (0x1f << 6), 6, "srlv", "DTS", }, 69 { kRTypeMask | (0x1f << 6), (1 << 6) | 6, "rotrv", "DTS", }, 70 { kRTypeMask | (0x1f << 6), 7, "srav", "DTS", }, 71 { kRTypeMask, 8, "jr", "S", }, 72 { kRTypeMask | (0x1f << 11), 9 | (31 << 11), "jalr", "S", }, // rd = 31 is implicit. 73 { kRTypeMask | (0x1f << 11), 9, "jr", "S", }, // rd = 0 is implicit. 74 { kRTypeMask, 9, "jalr", "DS", }, // General case. 75 { kRTypeMask | (0x1f << 6), 10, "movz", "DST", }, 76 { kRTypeMask | (0x1f << 6), 11, "movn", "DST", }, 77 { kRTypeMask, 12, "syscall", "", }, // TODO: code 78 { kRTypeMask, 13, "break", "", }, // TODO: code 79 { kRTypeMask, 15, "sync", "", }, // TODO: type 80 { kRTypeMask, 16, "mfhi", "D", }, 81 { kRTypeMask, 17, "mthi", "S", }, 82 { kRTypeMask, 18, "mflo", "D", }, 83 { kRTypeMask, 19, "mtlo", "S", }, 84 { kRTypeMask | (0x1f << 6), 20, "dsllv", "DTS", }, 85 { kRTypeMask | (0x1f << 6), 22, "dsrlv", "DTS", }, 86 { kRTypeMask | (0x1f << 6), (1 << 6) | 22, "drotrv", "DTS", }, 87 { kRTypeMask | (0x1f << 6), 23, "dsrav", "DTS", }, 88 { kRTypeMask | (0x1f << 6), 24, "mult", "ST", }, 89 { kRTypeMask | (0x1f << 6), 25, "multu", "ST", }, 90 { kRTypeMask | (0x1f << 6), 26, "div", "ST", }, 91 { kRTypeMask | (0x1f << 6), 27, "divu", "ST", }, 92 { kRTypeMask | (0x1f << 6), 24 + (2 << 6), "mul", "DST", }, 93 { kRTypeMask | (0x1f << 6), 24 + (3 << 6), "muh", "DST", }, 94 { kRTypeMask | (0x1f << 6), 26 + (2 << 6), "div", "DST", }, 95 { kRTypeMask | (0x1f << 6), 26 + (3 << 6), "mod", "DST", }, 96 { kRTypeMask, 32, "add", "DST", }, 97 { kRTypeMask, 33, "addu", "DST", }, 98 { kRTypeMask, 34, "sub", "DST", }, 99 { kRTypeMask, 35, "subu", "DST", }, 100 { kRTypeMask, 36, "and", "DST", }, 101 { kRTypeMask, 37, "or", "DST", }, 102 { kRTypeMask, 38, "xor", "DST", }, 103 { kRTypeMask, 39, "nor", "DST", }, 104 { kRTypeMask, 42, "slt", "DST", }, 105 { kRTypeMask, 43, "sltu", "DST", }, 106 { kRTypeMask, 45, "daddu", "DST", }, 107 { kRTypeMask, 46, "dsub", "DST", }, 108 { kRTypeMask, 47, "dsubu", "DST", }, 109 // TODO: tge[u], tlt[u], teg, tne 110 { kRTypeMask | (0x1f << 21), 56, "dsll", "DTA", }, 111 { kRTypeMask | (0x1f << 21), 58, "dsrl", "DTA", }, 112 { kRTypeMask | (0x1f << 21), (1 << 21) | 58, "drotr", "DTA", }, 113 { kRTypeMask | (0x1f << 21), 59, "dsra", "DTA", }, 114 { kRTypeMask | (0x1f << 21), 60, "dsll32", "DTA", }, 115 { kRTypeMask | (0x1f << 21), 62, "dsrl32", "DTA", }, 116 { kRTypeMask | (0x1f << 21), (1 << 21) | 62, "drotr32", "DTA", }, 117 { kRTypeMask | (0x1f << 21), 63, "dsra32", "DTA", }, 118 119 // SPECIAL0 120 { kSpecial0Mask | 0x307ff, 1, "movf", "DSc" }, 121 { kSpecial0Mask | 0x307ff, 0x10001, "movt", "DSc" }, 122 { kSpecial0Mask | 0x7ff, (2 << 6) | 24, "mul", "DST" }, 123 { kSpecial0Mask | 0x7ff, (3 << 6) | 24, "muh", "DST" }, 124 { kSpecial0Mask | 0x7ff, (2 << 6) | 25, "mulu", "DST" }, 125 { kSpecial0Mask | 0x7ff, (3 << 6) | 25, "muhu", "DST" }, 126 { kSpecial0Mask | 0x7ff, (2 << 6) | 26, "div", "DST" }, 127 { kSpecial0Mask | 0x7ff, (3 << 6) | 26, "mod", "DST" }, 128 { kSpecial0Mask | 0x7ff, (2 << 6) | 27, "divu", "DST" }, 129 { kSpecial0Mask | 0x7ff, (3 << 6) | 27, "modu", "DST" }, 130 { kSpecial0Mask | 0x7ff, (2 << 6) | 28, "dmul", "DST" }, 131 { kSpecial0Mask | 0x7ff, (3 << 6) | 28, "dmuh", "DST" }, 132 { kSpecial0Mask | 0x7ff, (2 << 6) | 29, "dmulu", "DST" }, 133 { kSpecial0Mask | 0x7ff, (3 << 6) | 29, "dmuhu", "DST" }, 134 { kSpecial0Mask | 0x7ff, (2 << 6) | 30, "ddiv", "DST" }, 135 { kSpecial0Mask | 0x7ff, (3 << 6) | 30, "dmod", "DST" }, 136 { kSpecial0Mask | 0x7ff, (2 << 6) | 31, "ddivu", "DST" }, 137 { kSpecial0Mask | 0x7ff, (3 << 6) | 31, "dmodu", "DST" }, 138 { kSpecial0Mask | 0x7ff, (0 << 6) | 53, "seleqz", "DST" }, 139 { kSpecial0Mask | 0x7ff, (0 << 6) | 55, "selnez", "DST" }, 140 { kSpecial0Mask | (0x1f << 21) | 0x3f, (1 << 21) | 2, "rotr", "DTA", }, 141 { kSpecial0Mask | (0x1f << 16) | 0x7ff, (0x01 << 6) | 0x10, "clz", "DS" }, 142 { kSpecial0Mask | (0x1f << 16) | 0x7ff, (0x01 << 6) | 0x11, "clo", "DS" }, 143 { kSpecial0Mask | (0x1f << 16) | 0x7ff, (0x01 << 6) | 0x12, "dclz", "DS" }, 144 { kSpecial0Mask | (0x1f << 16) | 0x7ff, (0x01 << 6) | 0x13, "dclo", "DS" }, 145 { kSpecial0Mask | 0x73f, 0x05, "lsa", "DSTj" }, 146 { kSpecial0Mask | 0x73f, 0x15, "dlsa", "DSTj" }, 147 // TODO: sdbbp 148 149 // SPECIAL2 150 { kSpecial2Mask | 0x7ff, (28 << kOpcodeShift) | 2, "mul", "DST" }, 151 { kSpecial2Mask | 0x7ff, (28 << kOpcodeShift) | 32, "clz", "DS" }, 152 { kSpecial2Mask | 0x7ff, (28 << kOpcodeShift) | 33, "clo", "DS" }, 153 { kSpecial2Mask | 0xffff, (28 << kOpcodeShift) | 0, "madd", "ST" }, 154 { kSpecial2Mask | 0xffff, (28 << kOpcodeShift) | 1, "maddu", "ST" }, 155 { kSpecial2Mask | 0xffff, (28 << kOpcodeShift) | 2, "mul", "DST" }, 156 { kSpecial2Mask | 0xffff, (28 << kOpcodeShift) | 4, "msub", "ST" }, 157 { kSpecial2Mask | 0xffff, (28 << kOpcodeShift) | 5, "msubu", "ST" }, 158 { kSpecial2Mask | 0x3f, (28 << kOpcodeShift) | 0x3f, "sdbbp", "" }, // TODO: code 159 160 // SPECIAL3 161 { kSpecial3Mask | 0x3f, (31 << kOpcodeShift), "ext", "TSAZ", }, 162 { kSpecial3Mask | 0x3f, (31 << kOpcodeShift) | 3, "dext", "TSAZ", }, 163 { kSpecial3Mask | 0x3f, (31 << kOpcodeShift) | 4, "ins", "TSAz", }, 164 { kSpecial3Mask | 0x3f, (31 << kOpcodeShift) | 6, "dinsu", "TSFz", }, 165 { kSpecial3Mask | (0x1f << 21) | (0x1f << 6) | 0x3f, 166 (31 << kOpcodeShift) | (16 << 6) | 32, 167 "seb", 168 "DT", }, 169 { kSpecial3Mask | (0x1f << 21) | (0x1f << 6) | 0x3f, 170 (31 << kOpcodeShift) | (24 << 6) | 32, 171 "seh", 172 "DT", }, 173 { kSpecial3Mask | (0x1f << 21) | (0x1f << 6) | 0x3f, 174 (31 << kOpcodeShift) | 32, 175 "bitswap", 176 "DT", }, 177 { kSpecial3Mask | (0x1f << 21) | (0x1f << 6) | 0x3f, 178 (31 << kOpcodeShift) | 36, 179 "dbitswap", 180 "DT", }, 181 { kSpecial3Mask | (0x1f << 21) | (0x1f << 6) | 0x3f, 182 (31 << kOpcodeShift) | (2 << 6) | 36, 183 "dsbh", 184 "DT", }, 185 { kSpecial3Mask | (0x1f << 21) | (0x1f << 6) | 0x3f, 186 (31 << kOpcodeShift) | (5 << 6) | 36, 187 "dshd", 188 "DT", }, 189 { kSpecial3Mask | (0x1f << 21) | (0x1f << 6) | 0x3f, 190 (31 << kOpcodeShift) | (2 << 6) | 32, 191 "wsbh", 192 "DT", }, 193 { kSpecial3Mask | 0x7f, (31 << kOpcodeShift) | 0x26, "sc", "Tl", }, 194 { kSpecial3Mask | 0x7f, (31 << kOpcodeShift) | 0x27, "scd", "Tl", }, 195 { kSpecial3Mask | 0x7f, (31 << kOpcodeShift) | 0x36, "ll", "Tl", }, 196 { kSpecial3Mask | 0x7f, (31 << kOpcodeShift) | 0x37, "lld", "Tl", }, 197 198 // J-type instructions. 199 { kJTypeMask, 2 << kOpcodeShift, "j", "L" }, 200 { kJTypeMask, 3 << kOpcodeShift, "jal", "L" }, 201 202 // I-type instructions. 203 { kITypeMask, 4 << kOpcodeShift, "beq", "STB" }, 204 { kITypeMask, 5 << kOpcodeShift, "bne", "STB" }, 205 { kITypeMask | (0x1f << 16), 1 << kOpcodeShift | (1 << 16), "bgez", "SB" }, 206 { kITypeMask | (0x1f << 16), 1 << kOpcodeShift | (0 << 16), "bltz", "SB" }, 207 { kITypeMask | (0x1f << 16), 1 << kOpcodeShift | (2 << 16), "bltzl", "SB" }, 208 { kITypeMask | (0x1f << 16), 1 << kOpcodeShift | (16 << 16), "bltzal", "SB" }, 209 { kITypeMask | (0x1f << 16), 1 << kOpcodeShift | (18 << 16), "bltzall", "SB" }, 210 { kITypeMask | (0x1f << 16), 6 << kOpcodeShift | (0 << 16), "blez", "SB" }, 211 { kITypeMask, 6 << kOpcodeShift, "bgeuc", "STB" }, 212 { kITypeMask | (0x1f << 16), 7 << kOpcodeShift | (0 << 16), "bgtz", "SB" }, 213 { kITypeMask, 7 << kOpcodeShift, "bltuc", "STB" }, 214 { kITypeMask | (0x1f << 16), 1 << kOpcodeShift | (6 << 16), "dahi", "Si", }, 215 { kITypeMask | (0x1f << 16), 1 << kOpcodeShift | (30 << 16), "dati", "Si", }, 216 217 { 0xffff0000, (4 << kOpcodeShift), "b", "B" }, 218 { 0xffff0000, (1 << kOpcodeShift) | (17 << 16), "bal", "B" }, 219 220 { kITypeMask, 8 << kOpcodeShift, "beqc", "STB" }, 221 222 { kITypeMask, 8 << kOpcodeShift, "addi", "TSi", }, 223 { kITypeMask, 9 << kOpcodeShift, "addiu", "TSi", }, 224 { kITypeMask, 10 << kOpcodeShift, "slti", "TSi", }, 225 { kITypeMask, 11 << kOpcodeShift, "sltiu", "TSi", }, 226 { kITypeMask, 12 << kOpcodeShift, "andi", "TSi", }, 227 { kITypeMask, 13 << kOpcodeShift, "ori", "TSi", }, 228 { kITypeMask, 14 << kOpcodeShift, "xori", "TSi", }, 229 { kITypeMask | (0x1f << 21), 15 << kOpcodeShift, "lui", "Ti", }, 230 { kITypeMask, 15 << kOpcodeShift, "aui", "TSi", }, 231 232 { kITypeMask | (0x3e3 << 16), (17 << kOpcodeShift) | (8 << 21), "bc1f", "cB" }, 233 { kITypeMask | (0x3e3 << 16), (17 << kOpcodeShift) | (8 << 21) | (1 << 16), "bc1t", "cB" }, 234 { kITypeMask | (0x1f << 21), (17 << kOpcodeShift) | (9 << 21), "bc1eqz", "tB" }, 235 { kITypeMask | (0x1f << 21), (17 << kOpcodeShift) | (13 << 21), "bc1nez", "tB" }, 236 237 { kITypeMask | (0x1f << 21), 22 << kOpcodeShift, "blezc", "TB" }, 238 239 // TODO: de-dup 240 { kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (1 << 21) | (1 << 16), "bgezc", "TB" }, 241 { kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (2 << 21) | (2 << 16), "bgezc", "TB" }, 242 { kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (3 << 21) | (3 << 16), "bgezc", "TB" }, 243 { kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (4 << 21) | (4 << 16), "bgezc", "TB" }, 244 { kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (5 << 21) | (5 << 16), "bgezc", "TB" }, 245 { kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (6 << 21) | (6 << 16), "bgezc", "TB" }, 246 { kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (7 << 21) | (7 << 16), "bgezc", "TB" }, 247 { kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (8 << 21) | (8 << 16), "bgezc", "TB" }, 248 { kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (9 << 21) | (9 << 16), "bgezc", "TB" }, 249 { kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (10 << 21) | (10 << 16), "bgezc", "TB" }, 250 { kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (11 << 21) | (11 << 16), "bgezc", "TB" }, 251 { kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (12 << 21) | (12 << 16), "bgezc", "TB" }, 252 { kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (13 << 21) | (13 << 16), "bgezc", "TB" }, 253 { kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (14 << 21) | (14 << 16), "bgezc", "TB" }, 254 { kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (15 << 21) | (15 << 16), "bgezc", "TB" }, 255 { kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (16 << 21) | (16 << 16), "bgezc", "TB" }, 256 { kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (17 << 21) | (17 << 16), "bgezc", "TB" }, 257 { kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (18 << 21) | (18 << 16), "bgezc", "TB" }, 258 { kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (19 << 21) | (19 << 16), "bgezc", "TB" }, 259 { kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (20 << 21) | (20 << 16), "bgezc", "TB" }, 260 { kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (21 << 21) | (21 << 16), "bgezc", "TB" }, 261 { kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (22 << 21) | (22 << 16), "bgezc", "TB" }, 262 { kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (23 << 21) | (23 << 16), "bgezc", "TB" }, 263 { kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (24 << 21) | (24 << 16), "bgezc", "TB" }, 264 { kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (25 << 21) | (25 << 16), "bgezc", "TB" }, 265 { kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (26 << 21) | (26 << 16), "bgezc", "TB" }, 266 { kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (27 << 21) | (27 << 16), "bgezc", "TB" }, 267 { kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (28 << 21) | (28 << 16), "bgezc", "TB" }, 268 { kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (29 << 21) | (29 << 16), "bgezc", "TB" }, 269 { kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (30 << 21) | (30 << 16), "bgezc", "TB" }, 270 { kITypeMask | (0x3ff << 16), (22 << kOpcodeShift) | (31 << 21) | (31 << 16), "bgezc", "TB" }, 271 272 { kITypeMask, 22 << kOpcodeShift, "bgec", "STB" }, 273 274 { kITypeMask | (0x1f << 21), 23 << kOpcodeShift, "bgtzc", "TB" }, 275 276 // TODO: de-dup 277 { kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (1 << 21) | (1 << 16), "bltzc", "TB" }, 278 { kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (2 << 21) | (2 << 16), "bltzc", "TB" }, 279 { kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (3 << 21) | (3 << 16), "bltzc", "TB" }, 280 { kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (4 << 21) | (4 << 16), "bltzc", "TB" }, 281 { kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (5 << 21) | (5 << 16), "bltzc", "TB" }, 282 { kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (6 << 21) | (6 << 16), "bltzc", "TB" }, 283 { kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (7 << 21) | (7 << 16), "bltzc", "TB" }, 284 { kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (8 << 21) | (8 << 16), "bltzc", "TB" }, 285 { kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (9 << 21) | (9 << 16), "bltzc", "TB" }, 286 { kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (10 << 21) | (10 << 16), "bltzc", "TB" }, 287 { kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (11 << 21) | (11 << 16), "bltzc", "TB" }, 288 { kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (12 << 21) | (12 << 16), "bltzc", "TB" }, 289 { kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (13 << 21) | (13 << 16), "bltzc", "TB" }, 290 { kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (14 << 21) | (14 << 16), "bltzc", "TB" }, 291 { kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (15 << 21) | (15 << 16), "bltzc", "TB" }, 292 { kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (16 << 21) | (16 << 16), "bltzc", "TB" }, 293 { kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (17 << 21) | (17 << 16), "bltzc", "TB" }, 294 { kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (18 << 21) | (18 << 16), "bltzc", "TB" }, 295 { kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (19 << 21) | (19 << 16), "bltzc", "TB" }, 296 { kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (20 << 21) | (20 << 16), "bltzc", "TB" }, 297 { kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (21 << 21) | (21 << 16), "bltzc", "TB" }, 298 { kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (22 << 21) | (22 << 16), "bltzc", "TB" }, 299 { kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (23 << 21) | (23 << 16), "bltzc", "TB" }, 300 { kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (24 << 21) | (24 << 16), "bltzc", "TB" }, 301 { kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (25 << 21) | (25 << 16), "bltzc", "TB" }, 302 { kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (26 << 21) | (26 << 16), "bltzc", "TB" }, 303 { kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (27 << 21) | (27 << 16), "bltzc", "TB" }, 304 { kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (28 << 21) | (28 << 16), "bltzc", "TB" }, 305 { kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (29 << 21) | (29 << 16), "bltzc", "TB" }, 306 { kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (30 << 21) | (30 << 16), "bltzc", "TB" }, 307 { kITypeMask | (0x3ff << 16), (23 << kOpcodeShift) | (31 << 21) | (31 << 16), "bltzc", "TB" }, 308 309 { kITypeMask, 23 << kOpcodeShift, "bltc", "STB" }, 310 311 { kITypeMask, 24 << kOpcodeShift, "bnec", "STB" }, 312 313 { kITypeMask, 25 << kOpcodeShift, "daddiu", "TSi", }, 314 { kITypeMask, 29 << kOpcodeShift, "daui", "TSi", }, 315 316 { kITypeMask, 32u << kOpcodeShift, "lb", "TO", }, 317 { kITypeMask, 33u << kOpcodeShift, "lh", "TO", }, 318 { kITypeMask, 34u << kOpcodeShift, "lwl", "TO", }, 319 { kITypeMask, 35u << kOpcodeShift, "lw", "TO", }, 320 { kITypeMask, 36u << kOpcodeShift, "lbu", "TO", }, 321 { kITypeMask, 37u << kOpcodeShift, "lhu", "TO", }, 322 { kITypeMask, 38u << kOpcodeShift, "lwr", "TO", }, 323 { kITypeMask, 39u << kOpcodeShift, "lwu", "TO", }, 324 { kITypeMask, 40u << kOpcodeShift, "sb", "TO", }, 325 { kITypeMask, 41u << kOpcodeShift, "sh", "TO", }, 326 { kITypeMask, 42u << kOpcodeShift, "swl", "TO", }, 327 { kITypeMask, 43u << kOpcodeShift, "sw", "TO", }, 328 { kITypeMask, 46u << kOpcodeShift, "swr", "TO", }, 329 { kITypeMask, 48u << kOpcodeShift, "ll", "TO", }, 330 { kITypeMask, 49u << kOpcodeShift, "lwc1", "tO", }, 331 { kJTypeMask, 50u << kOpcodeShift, "bc", "P" }, 332 { kITypeMask, 53u << kOpcodeShift, "ldc1", "tO", }, 333 { kITypeMask | (0x1f << 21), 54u << kOpcodeShift, "jic", "Ti" }, 334 { kITypeMask | (1 << 21), (54u << kOpcodeShift) | (1 << 21), "beqzc", "Sb" }, // TODO: de-dup? 335 { kITypeMask | (1 << 22), (54u << kOpcodeShift) | (1 << 22), "beqzc", "Sb" }, 336 { kITypeMask | (1 << 23), (54u << kOpcodeShift) | (1 << 23), "beqzc", "Sb" }, 337 { kITypeMask | (1 << 24), (54u << kOpcodeShift) | (1 << 24), "beqzc", "Sb" }, 338 { kITypeMask | (1 << 25), (54u << kOpcodeShift) | (1 << 25), "beqzc", "Sb" }, 339 { kITypeMask, 55u << kOpcodeShift, "ld", "TO", }, 340 { kITypeMask, 56u << kOpcodeShift, "sc", "TO", }, 341 { kITypeMask, 57u << kOpcodeShift, "swc1", "tO", }, 342 { kJTypeMask, 58u << kOpcodeShift, "balc", "P" }, 343 { kITypeMask | (0x1f << 16), (59u << kOpcodeShift) | (30 << 16), "auipc", "Si" }, 344 { kITypeMask | (0x3 << 19), (59u << kOpcodeShift) | (0 << 19), "addiupc", "Sp" }, 345 { kITypeMask | (0x3 << 19), (59u << kOpcodeShift) | (1 << 19), "lwpc", "So" }, 346 { kITypeMask | (0x3 << 19), (59u << kOpcodeShift) | (2 << 19), "lwupc", "So" }, 347 { kITypeMask | (0x7 << 18), (59u << kOpcodeShift) | (6 << 18), "ldpc", "S0" }, 348 { kITypeMask, 61u << kOpcodeShift, "sdc1", "tO", }, 349 { kITypeMask | (0x1f << 21), 62u << kOpcodeShift, "jialc", "Ti" }, 350 { kITypeMask | (1 << 21), (62u << kOpcodeShift) | (1 << 21), "bnezc", "Sb" }, // TODO: de-dup? 351 { kITypeMask | (1 << 22), (62u << kOpcodeShift) | (1 << 22), "bnezc", "Sb" }, 352 { kITypeMask | (1 << 23), (62u << kOpcodeShift) | (1 << 23), "bnezc", "Sb" }, 353 { kITypeMask | (1 << 24), (62u << kOpcodeShift) | (1 << 24), "bnezc", "Sb" }, 354 { kITypeMask | (1 << 25), (62u << kOpcodeShift) | (1 << 25), "bnezc", "Sb" }, 355 { kITypeMask, 63u << kOpcodeShift, "sd", "TO", }, 356 357 // Floating point. 358 { kFpMask | (0x1f << 21), kCop1 | (0x00 << 21), "mfc1", "Td" }, 359 { kFpMask | (0x1f << 21), kCop1 | (0x01 << 21), "dmfc1", "Td" }, 360 { kFpMask | (0x1f << 21), kCop1 | (0x03 << 21), "mfhc1", "Td" }, 361 { kFpMask | (0x1f << 21), kCop1 | (0x04 << 21), "mtc1", "Td" }, 362 { kFpMask | (0x1f << 21), kCop1 | (0x05 << 21), "dmtc1", "Td" }, 363 { kFpMask | (0x1f << 21), kCop1 | (0x07 << 21), "mthc1", "Td" }, 364 { kFpMask | (0x1f << 21), kCop1 | (0x14 << 21) | 1, "cmp.un.s", "adt" }, 365 { kFpMask | (0x1f << 21), kCop1 | (0x14 << 21) | 2, "cmp.eq.s", "adt" }, 366 { kFpMask | (0x1f << 21), kCop1 | (0x14 << 21) | 3, "cmp.ueq.s", "adt" }, 367 { kFpMask | (0x1f << 21), kCop1 | (0x14 << 21) | 4, "cmp.lt.s", "adt" }, 368 { kFpMask | (0x1f << 21), kCop1 | (0x14 << 21) | 5, "cmp.ult.s", "adt" }, 369 { kFpMask | (0x1f << 21), kCop1 | (0x14 << 21) | 6, "cmp.le.s", "adt" }, 370 { kFpMask | (0x1f << 21), kCop1 | (0x14 << 21) | 7, "cmp.ule.s", "adt" }, 371 { kFpMask | (0x1f << 21), kCop1 | (0x14 << 21) | 17, "cmp.or.s", "adt" }, 372 { kFpMask | (0x1f << 21), kCop1 | (0x14 << 21) | 18, "cmp.une.s", "adt" }, 373 { kFpMask | (0x1f << 21), kCop1 | (0x14 << 21) | 19, "cmp.ne.s", "adt" }, 374 { kFpMask | (0x1f << 21), kCop1 | (0x15 << 21) | 1, "cmp.un.d", "adt" }, 375 { kFpMask | (0x1f << 21), kCop1 | (0x15 << 21) | 2, "cmp.eq.d", "adt" }, 376 { kFpMask | (0x1f << 21), kCop1 | (0x15 << 21) | 3, "cmp.ueq.d", "adt" }, 377 { kFpMask | (0x1f << 21), kCop1 | (0x15 << 21) | 4, "cmp.lt.d", "adt" }, 378 { kFpMask | (0x1f << 21), kCop1 | (0x15 << 21) | 5, "cmp.ult.d", "adt" }, 379 { kFpMask | (0x1f << 21), kCop1 | (0x15 << 21) | 6, "cmp.le.d", "adt" }, 380 { kFpMask | (0x1f << 21), kCop1 | (0x15 << 21) | 7, "cmp.ule.d", "adt" }, 381 { kFpMask | (0x1f << 21), kCop1 | (0x15 << 21) | 17, "cmp.or.d", "adt" }, 382 { kFpMask | (0x1f << 21), kCop1 | (0x15 << 21) | 18, "cmp.une.d", "adt" }, 383 { kFpMask | (0x1f << 21), kCop1 | (0x15 << 21) | 19, "cmp.ne.d", "adt" }, 384 { kFpMask | (0x10 << 21), kCop1 | (0x10 << 21) | 0, "add", "fadt" }, 385 { kFpMask | (0x10 << 21), kCop1 | (0x10 << 21) | 1, "sub", "fadt" }, 386 { kFpMask | (0x10 << 21), kCop1 | (0x10 << 21) | 2, "mul", "fadt" }, 387 { kFpMask | (0x10 << 21), kCop1 | (0x10 << 21) | 3, "div", "fadt" }, 388 { kFpMask | (0x10 << 21), kCop1 | (0x10 << 21) | 4, "sqrt", "fad" }, 389 { kFpMask | (0x21f << 16), kCop1 | (0x200 << 16) | 5, "abs", "fad" }, 390 { kFpMask | (0x21f << 16), kCop1 | (0x200 << 16) | 6, "mov", "fad" }, 391 { kFpMask | (0x21f << 16), kCop1 | (0x200 << 16) | 7, "neg", "fad" }, 392 { kFpMask | (0x21f << 16), kCop1 | (0x200 << 16) | 8, "round.l", "fad" }, 393 { kFpMask | (0x21f << 16), kCop1 | (0x200 << 16) | 9, "trunc.l", "fad" }, 394 { kFpMask | (0x21f << 16), kCop1 | (0x200 << 16) | 10, "ceil.l", "fad" }, 395 { kFpMask | (0x21f << 16), kCop1 | (0x200 << 16) | 11, "floor.l", "fad" }, 396 { kFpMask | (0x21f << 16), kCop1 | (0x200 << 16) | 12, "round.w", "fad" }, 397 { kFpMask | (0x21f << 16), kCop1 | (0x200 << 16) | 13, "trunc.w", "fad" }, 398 { kFpMask | (0x21f << 16), kCop1 | (0x200 << 16) | 14, "ceil.w", "fad" }, 399 { kFpMask | (0x21f << 16), kCop1 | (0x200 << 16) | 15, "floor.w", "fad" }, 400 { kFpMask | (0x201 << 16), kCop1 | (0x200 << 16) | 17, "movf", "fadc" }, 401 { kFpMask | (0x201 << 16), kCop1 | (0x201 << 16) | 17, "movt", "fadc" }, 402 { kFpMask | (0x10 << 21), kCop1 | (0x10 << 21) | 18, "movz", "fadT" }, 403 { kFpMask | (0x10 << 21), kCop1 | (0x10 << 21) | 19, "movn", "fadT" }, 404 { kFpMask | (0x10 << 21), kCop1 | (0x10 << 21) | 20, "seleqz", "fadt" }, 405 { kFpMask | (0x10 << 21), kCop1 | (0x10 << 21) | 23, "selnez", "fadt" }, 406 { kFpMask | (0x21f << 16), kCop1 | (0x200 << 16) | 26, "rint", "fad" }, 407 { kFpMask | (0x21f << 16), kCop1 | (0x200 << 16) | 27, "class", "fad" }, 408 { kFpMask | (0x21f << 16), kCop1 | (0x200 << 16) | 32, "cvt.s", "fad" }, 409 { kFpMask | (0x21f << 16), kCop1 | (0x200 << 16) | 33, "cvt.d", "fad" }, 410 { kFpMask | (0x21f << 16), kCop1 | (0x200 << 16) | 36, "cvt.w", "fad" }, 411 { kFpMask | (0x21f << 16), kCop1 | (0x200 << 16) | 37, "cvt.l", "fad" }, 412 { kFpMask | (0x21f << 16), kCop1 | (0x200 << 16) | 38, "cvt.ps", "fad" }, 413 { kFpMask | (0x10 << 21), kCop1 | (0x10 << 21) | 49, "c.un", "fCdt" }, 414 { kFpMask | (0x10 << 21), kCop1 | (0x10 << 21) | 50, "c.eq", "fCdt" }, 415 { kFpMask | (0x10 << 21), kCop1 | (0x10 << 21) | 51, "c.ueq", "fCdt" }, 416 { kFpMask | (0x10 << 21), kCop1 | (0x10 << 21) | 52, "c.olt", "fCdt" }, 417 { kFpMask | (0x10 << 21), kCop1 | (0x10 << 21) | 53, "c.ult", "fCdt" }, 418 { kFpMask | (0x10 << 21), kCop1 | (0x10 << 21) | 54, "c.ole", "fCdt" }, 419 { kFpMask | (0x10 << 21), kCop1 | (0x10 << 21) | 55, "c.ule", "fCdt" }, 420 { kFpMask, kCop1 | 0x10, "sel", "fadt" }, 421 { kFpMask, kCop1 | 0x1e, "max", "fadt" }, 422 { kFpMask, kCop1 | 0x1c, "min", "fadt" }, 423 424 // MSA instructions. 425 { kMsaMask | (0x1f << 21), kMsa | (0x0 << 21) | 0x1e, "and.v", "kmn" }, 426 { kMsaMask | (0x1f << 21), kMsa | (0x1 << 21) | 0x1e, "or.v", "kmn" }, 427 { kMsaMask | (0x1f << 21), kMsa | (0x2 << 21) | 0x1e, "nor.v", "kmn" }, 428 { kMsaMask | (0x1f << 21), kMsa | (0x3 << 21) | 0x1e, "xor.v", "kmn" }, 429 { kMsaMask | (0x7 << 23), kMsa | (0x0 << 23) | 0xe, "addv", "Vkmn" }, 430 { kMsaMask | (0x7 << 23), kMsa | (0x1 << 23) | 0xe, "subv", "Vkmn" }, 431 { kMsaMask | (0x7 << 23), kMsa | (0x0 << 23) | 0x12, "mulv", "Vkmn" }, 432 { kMsaMask | (0x7 << 23), kMsa | (0x4 << 23) | 0x12, "div_s", "Vkmn" }, 433 { kMsaMask | (0x7 << 23), kMsa | (0x5 << 23) | 0x12, "div_u", "Vkmn" }, 434 { kMsaMask | (0x7 << 23), kMsa | (0x6 << 23) | 0x12, "mod_s", "Vkmn" }, 435 { kMsaMask | (0x7 << 23), kMsa | (0x7 << 23) | 0x12, "mod_u", "Vkmn" }, 436 { kMsaMask | (0xf << 22), kMsa | (0x0 << 22) | 0x1b, "fadd", "Ukmn" }, 437 { kMsaMask | (0xf << 22), kMsa | (0x1 << 22) | 0x1b, "fsub", "Ukmn" }, 438 { kMsaMask | (0xf << 22), kMsa | (0x2 << 22) | 0x1b, "fmul", "Ukmn" }, 439 { kMsaMask | (0xf << 22), kMsa | (0x3 << 22) | 0x1b, "fdiv", "Ukmn" }, 440 { kMsaMask | (0x1ff << 17), kMsa | (0x19e << 17) | 0x1e, "ffint_s", "ukm" }, 441 { kMsaMask | (0x1ff << 17), kMsa | (0x19c << 17) | 0x1e, "ftint_s", "ukm" }, 442 { kMsaMask | (0x7 << 23), kMsa | (0x0 << 23) | 0xd, "sll", "Vkmn" }, 443 { kMsaMask | (0x7 << 23), kMsa | (0x1 << 23) | 0xd, "sra", "Vkmn" }, 444 { kMsaMask | (0x7 << 23), kMsa | (0x2 << 23) | 0xd, "srl", "Vkmn" }, 445 { kMsaMask | (0x7 << 23), kMsa | (0x0 << 23) | 0x9, "slli", "kmW" }, 446 { kMsaMask | (0x7 << 23), kMsa | (0x1 << 23) | 0x9, "srai", "kmW" }, 447 { kMsaMask | (0x7 << 23), kMsa | (0x2 << 23) | 0x9, "srli", "kmW" }, 448 { kMsaMask | (0x3ff << 16), kMsa | (0xbe << 16) | 0x19, "move.v", "km" }, 449 { kMsaMask | (0xf << 22), kMsa | (0x1 << 22) | 0x19, "splati", "kX" }, 450 { kMsaMask | (0xff << 18), kMsa | (0xc0 << 18) | 0x1e, "fill", "vkD" }, 451 { kMsaMask | (0x7 << 23), kMsa | (0x6 << 23) | 0x7, "ldi", "kx" }, 452 { kMsaSpecialMask | (0xf << 2), kMsa | (0x8 << 2), "ld", "kw" }, 453 { kMsaSpecialMask | (0xf << 2), kMsa | (0x9 << 2), "st", "kw" }, 454 }; 455 456 static uint32_t ReadU32(const uint8_t* ptr) { 457 // We only support little-endian MIPS. 458 return ptr[0] | (ptr[1] << 8) | (ptr[2] << 16) | (ptr[3] << 24); 459 } 460 461 size_t DisassemblerMips::Dump(std::ostream& os, const uint8_t* instr_ptr) { 462 uint32_t instruction = ReadU32(instr_ptr); 463 464 uint32_t rs = (instruction >> 21) & 0x1f; // I-type, R-type. 465 uint32_t rt = (instruction >> 16) & 0x1f; // I-type, R-type. 466 uint32_t rd = (instruction >> 11) & 0x1f; // R-type. 467 uint32_t sa = (instruction >> 6) & 0x1f; // R-type. 468 469 std::string opcode; 470 std::ostringstream args; 471 472 // TODO: remove this! 473 uint32_t op = (instruction >> 26) & 0x3f; 474 uint32_t function = (instruction & 0x3f); // R-type. 475 opcode = StringPrintf("op=%d fn=%d", op, function); 476 477 for (size_t i = 0; i < arraysize(gMipsInstructions); ++i) { 478 if (gMipsInstructions[i].Matches(instruction)) { 479 opcode = gMipsInstructions[i].name; 480 for (const char* args_fmt = gMipsInstructions[i].args_fmt; *args_fmt; ++args_fmt) { 481 switch (*args_fmt) { 482 case 'A': // sa (shift amount or [d]ins/[d]ext position). 483 args << sa; 484 break; 485 case 'B': // Branch offset. 486 { 487 int32_t offset = static_cast<int16_t>(instruction & 0xffff); 488 offset <<= 2; 489 offset += 4; // Delay slot. 490 args << FormatInstructionPointer(instr_ptr + offset) 491 << StringPrintf(" ; %+d", offset); 492 } 493 break; 494 case 'b': // 21-bit branch offset. 495 { 496 int32_t offset = (instruction & 0x1fffff) - ((instruction & 0x100000) << 1); 497 offset <<= 2; 498 offset += 4; // Delay slot. 499 args << FormatInstructionPointer(instr_ptr + offset) 500 << StringPrintf(" ; %+d", offset); 501 } 502 break; 503 case 'C': // Floating-point condition code flag in c.<cond>.fmt. 504 args << "cc" << (sa >> 2); 505 break; 506 case 'c': // Floating-point condition code flag in bc1f/bc1t and movf/movt. 507 args << "cc" << (rt >> 2); 508 break; 509 case 'D': args << 'r' << rd; break; 510 case 'd': args << 'f' << rd; break; 511 case 'a': args << 'f' << sa; break; 512 case 'F': args << (sa + 32); break; // dinsu position. 513 case 'f': // Floating point "fmt". 514 { 515 size_t fmt = (instruction >> 21) & 0x7; // TODO: other fmts? 516 switch (fmt) { 517 case 0: opcode += ".s"; break; 518 case 1: opcode += ".d"; break; 519 case 4: opcode += ".w"; break; 520 case 5: opcode += ".l"; break; 521 case 6: opcode += ".ps"; break; 522 default: opcode += ".?"; break; 523 } 524 continue; // No ", ". 525 } 526 case 'i': // Sign-extended lower 16-bit immediate. 527 args << static_cast<int16_t>(instruction & 0xffff); 528 break; 529 case 'j': // sa value for lsa/dlsa. 530 args << (sa + 1); 531 break; 532 case 'L': // Jump label. 533 { 534 // TODO: is this right? 535 uint32_t instr_index = (instruction & 0x1ffffff); 536 uint32_t target = (instr_index << 2); 537 target |= (reinterpret_cast<uintptr_t>(instr_ptr + 4) & 0xf0000000); 538 args << reinterpret_cast<void*>(target); 539 } 540 break; 541 case 'l': // 9-bit signed offset 542 { 543 int32_t offset = static_cast<int16_t>(instruction) >> 7; 544 args << StringPrintf("%+d(r%d)", offset, rs); 545 } 546 break; 547 case 'O': // +x(rs) 548 { 549 int32_t offset = static_cast<int16_t>(instruction & 0xffff); 550 args << StringPrintf("%+d(r%d)", offset, rs); 551 if (rs == 17) { 552 args << " ; "; 553 GetDisassemblerOptions()->thread_offset_name_function_(args, offset); 554 } 555 } 556 break; 557 case 'o': // 19-bit offset in lwpc and lwupc. 558 { 559 int32_t offset = (instruction & 0x7ffff) - ((instruction & 0x40000) << 1); 560 offset <<= 2; 561 args << FormatInstructionPointer(instr_ptr + offset); 562 args << StringPrintf(" ; %+d", offset); 563 } 564 break; 565 case '0': // 18-bit offset in ldpc. 566 { 567 int32_t offset = (instruction & 0x3ffff) - ((instruction & 0x20000) << 1); 568 offset <<= 3; 569 uintptr_t ptr = RoundDown(reinterpret_cast<uintptr_t>(instr_ptr), 8); 570 args << FormatInstructionPointer(reinterpret_cast<const uint8_t*>(ptr + offset)); 571 args << StringPrintf(" ; %+d", offset); 572 } 573 break; 574 case 'P': // 26-bit offset in bc and balc. 575 { 576 int32_t offset = (instruction & 0x3ffffff) - ((instruction & 0x2000000) << 1); 577 offset <<= 2; 578 offset += 4; 579 args << FormatInstructionPointer(instr_ptr + offset); 580 args << StringPrintf(" ; %+d", offset); 581 } 582 break; 583 case 'p': // 19-bit offset in addiupc. 584 { 585 int32_t offset = (instruction & 0x7ffff) - ((instruction & 0x40000) << 1); 586 args << offset << " ; move r" << rs << ", "; 587 args << FormatInstructionPointer(instr_ptr + (offset << 2)); 588 } 589 break; 590 case 'S': args << 'r' << rs; break; 591 case 's': args << 'f' << rs; break; 592 case 'T': args << 'r' << rt; break; 593 case 't': args << 'f' << rt; break; 594 case 'Z': args << (rd + 1); break; // sz ([d]ext size). 595 case 'z': args << (rd - sa + 1); break; // sz ([d]ins, dinsu size). 596 case 'k': args << 'w' << sa; break; 597 case 'm': args << 'w' << rd; break; 598 case 'n': args << 'w' << rt; break; 599 case 'U': // MSA 1-bit df (word/doubleword), position 21. 600 { 601 int32_t df = (instruction >> 21) & 0x1; 602 switch (df) { 603 case 0: opcode += ".w"; break; 604 case 1: opcode += ".d"; break; 605 } 606 continue; // No ", ". 607 } 608 case 'u': // MSA 1-bit df (word/doubleword), position 16. 609 { 610 int32_t df = (instruction >> 16) & 0x1; 611 switch (df) { 612 case 0: opcode += ".w"; break; 613 case 1: opcode += ".d"; break; 614 } 615 continue; // No ", ". 616 } 617 case 'V': // MSA 2-bit df, position 21. 618 { 619 int32_t df = (instruction >> 21) & 0x3; 620 switch (df) { 621 case 0: opcode += ".b"; break; 622 case 1: opcode += ".h"; break; 623 case 2: opcode += ".w"; break; 624 case 3: opcode += ".d"; break; 625 } 626 continue; // No ", ". 627 } 628 case 'v': // MSA 2-bit df, position 16. 629 { 630 int32_t df = (instruction >> 16) & 0x3; 631 switch (df) { 632 case 0: opcode += ".b"; break; 633 case 1: opcode += ".h"; break; 634 case 2: opcode += ".w"; break; 635 case 3: opcode += ".d"; break; 636 } 637 continue; // No ", ". 638 } 639 case 'W': // MSA df/m. 640 { 641 int32_t df_m = (instruction >> 16) & 0x7f; 642 if ((df_m & (0x1 << 6)) == 0) { 643 opcode += ".d"; 644 args << (df_m & 0x3f); 645 break; 646 } 647 if ((df_m & (0x1 << 5)) == 0) { 648 opcode += ".w"; 649 args << (df_m & 0x1f); 650 break; 651 } 652 if ((df_m & (0x1 << 4)) == 0) { 653 opcode += ".h"; 654 args << (df_m & 0xf); 655 break; 656 } 657 if ((df_m & (0x1 << 3)) == 0) { 658 opcode += ".b"; 659 args << (df_m & 0x7); 660 } 661 break; 662 } 663 case 'w': // MSA +x(rs). 664 { 665 int32_t df = instruction & 0x3; 666 int32_t s10 = (instruction >> 16) & 0x3ff; 667 s10 -= (s10 & 0x200) << 1; // Sign-extend s10. 668 switch (df) { 669 case 0: opcode += ".b"; break; 670 case 1: opcode += ".h"; break; 671 case 2: opcode += ".w"; break; 672 case 3: opcode += ".d"; break; 673 } 674 args << StringPrintf("%+d(r%d)", s10 << df, rd); 675 break; 676 } 677 case 'X': // MSA df/n - ws[x]. 678 { 679 int32_t df_n = (instruction >> 16) & 0x3f; 680 if ((df_n & (0x3 << 4)) == 0) { 681 opcode += ".b"; 682 args << 'w' << rd << '[' << (df_n & 0xf) << ']'; 683 break; 684 } 685 if ((df_n & (0x3 << 3)) == 0) { 686 opcode += ".h"; 687 args << 'w' << rd << '[' << (df_n & 0x7) << ']'; 688 break; 689 } 690 if ((df_n & (0x3 << 2)) == 0) { 691 opcode += ".w"; 692 args << 'w' << rd << '[' << (df_n & 0x3) << ']'; 693 break; 694 } 695 if ((df_n & (0x3 << 1)) == 0) { 696 opcode += ".d"; 697 args << 'w' << rd << '[' << (df_n & 0x1) << ']'; 698 } 699 break; 700 } 701 case 'x': // MSA i10. 702 { 703 int32_t df = (instruction >> 21) & 0x3; 704 int32_t i10 = (instruction >> 11) & 0x3ff; 705 i10 -= (i10 & 0x200) << 1; // Sign-extend i10. 706 switch (df) { 707 case 0: opcode += ".b"; break; 708 case 1: opcode += ".h"; break; 709 case 2: opcode += ".w"; break; 710 case 3: opcode += ".d"; break; 711 } 712 args << i10; 713 break; 714 } 715 } 716 if (*(args_fmt + 1)) { 717 args << ", "; 718 } 719 } 720 break; 721 } 722 } 723 724 // Special cases for sequences of: 725 // pc-relative +/- 2GB branch: 726 // auipc reg, imm 727 // jic reg, imm 728 // pc-relative +/- 2GB branch and link: 729 // auipc reg, imm 730 // jialc reg, imm 731 if (((op == 0x36 || op == 0x3E) && rs == 0 && rt != 0) && // ji[al]c 732 last_ptr_ && (intptr_t)instr_ptr - (intptr_t)last_ptr_ == 4 && 733 (last_instr_ & 0xFC1F0000) == 0xEC1E0000 && // auipc 734 ((last_instr_ >> 21) & 0x1F) == rt) { 735 uint32_t offset = (last_instr_ << 16) | (instruction & 0xFFFF); 736 offset -= (offset & 0x8000) << 1; 737 offset -= 4; 738 if (op == 0x36) { 739 args << " ; bc "; 740 } else { 741 args << " ; balc "; 742 } 743 args << FormatInstructionPointer(instr_ptr + (int32_t)offset); 744 args << StringPrintf(" ; %+d", (int32_t)offset); 745 } 746 747 os << FormatInstructionPointer(instr_ptr) 748 << StringPrintf(": %08x\t%-7s ", instruction, opcode.c_str()) 749 << args.str() << '\n'; 750 last_ptr_ = instr_ptr; 751 last_instr_ = instruction; 752 return 4; 753 } 754 755 void DisassemblerMips::Dump(std::ostream& os, const uint8_t* begin, const uint8_t* end) { 756 for (const uint8_t* cur = begin; cur < end; cur += 4) { 757 Dump(os, cur); 758 } 759 } 760 761 } // namespace mips 762 } // namespace art 763
