offlineasm/instructions.rb

   1 # Copyright (C) 2011 Apple Inc. All rights reserved.
   2 #
   3 # Redistribution and use in source and binary forms, with or without
   4 # modification, are permitted provided that the following conditions
   5 # are met:
   6 # 1. Redistributions of source code must retain the above copyright
   7 #    notice, this list of conditions and the following disclaimer.
   8 # 2. Redistributions in binary form must reproduce the above copyright
   9 #    notice, this list of conditions and the following disclaimer in the
  10 #    documentation and/or other materials provided with the distribution.
  11 #
  12 # THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
  13 # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  14 # THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  15 # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
  16 # BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  17 # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  18 # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  19 # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  20 # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  21 # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  22 # THE POSSIBILITY OF SUCH DAMAGE.
  23
  24 require "config"
  25
  26 # Interesting invariant, which we take advantage of: branching instructions
  27 # always begin with "b", and no non-branching instructions begin with "b".
  28 # Terminal instructions are "jmp" and "ret".
  29
  30 MACRO_INSTRUCTIONS =
  31     [
  32      "addi",
  33      "andi",
  34      "lshifti",
  35      "lshiftp",
  36      "lshiftq",
  37      "muli",
  38      "negi",
  39      "negp",
  40      "negq",
  41      "noti",
  42      "ori",
  43      "rshifti",
  44      "urshifti",
  45      "rshiftp",
  46      "urshiftp",
  47      "rshiftq",
  48      "urshiftq",
  49      "subi",
  50      "xori",
  51      "loadi",
  52      "loadis",
  53      "loadb",
  54      "loadbs",
  55      "loadh",
  56      "loadhs",
  57      "storei",
  58      "storeb",
  59      "loadd",
  60      "moved",
  61      "stored",
  62      "addd",
  63      "divd",
  64      "subd",
  65      "muld",
  66      "sqrtd",
  67      "ci2d",
  68      "fii2d", # usage: fii2d <gpr with least significant bits>, <gpr with most significant bits>, <fpr>
  69      "fd2ii", # usage: fd2ii <fpr>, <gpr with least significant bits>, <gpr with most significant bits>
  70      "fq2d",
  71      "fd2q",
  72      "bdeq",
  73      "bdneq",
  74      "bdgt",
  75      "bdgteq",
  76      "bdlt",
  77      "bdlteq",
  78      "bdequn",
  79      "bdnequn",
  80      "bdgtun",
  81      "bdgtequn",
  82      "bdltun",
  83      "bdltequn",
  84      "btd2i",
  85      "td2i",
  86      "bcd2i",
  87      "movdz",
  88      "pop",
  89      "push",
  90      "move",
  91      "sxi2q",
  92      "zxi2q",
  93      "nop",
  94      "bieq",
  95      "bineq",
  96      "bia",
  97      "biaeq",
  98      "bib",
  99      "bibeq",
 100      "bigt",
 101      "bigteq",
 102      "bilt",
 103      "bilteq",
 104      "bbeq",
 105      "bbneq",
 106      "bba",
 107      "bbaeq",
 108      "bbb",
 109      "bbbeq",
 110      "bbgt",
 111      "bbgteq",
 112      "bblt",
 113      "bblteq",
 114      "btis",
 115      "btiz",
 116      "btinz",
 117      "btbs",
 118      "btbz",
 119      "btbnz",
 120      "jmp",
 121      "baddio",
 122      "baddis",
 123      "baddiz",
 124      "baddinz",
 125      "bsubio",
 126      "bsubis",
 127      "bsubiz",
 128      "bsubinz",
 129      "bmulio",
 130      "bmulis",
 131      "bmuliz",
 132      "bmulinz",
 133      "borio",
 134      "boris",
 135      "boriz",
 136      "borinz",
 137      "break",
 138      "call",
 139      "ret",
 140      "cbeq",
 141      "cbneq",
 142      "cba",
 143      "cbaeq",
 144      "cbb",
 145      "cbbeq",
 146      "cbgt",
 147      "cbgteq",
 148      "cblt",
 149      "cblteq",
 150      "cieq",
 151      "cineq",
 152      "cia",
 153      "ciaeq",
 154      "cib",
 155      "cibeq",
 156      "cigt",
 157      "cigteq",
 158      "cilt",
 159      "cilteq",
 160      "tis",
 161      "tiz",
 162      "tinz",
 163      "tbs",
 164      "tbz",
 165      "tbnz",
 166      "tps",
 167      "tpz",
 168      "tpnz",
 169      "peek",
 170      "poke",
 171      "bpeq",
 172      "bpneq",
 173      "bpa",
 174      "bpaeq",
 175      "bpb",
 176      "bpbeq",
 177      "bpgt",
 178      "bpgteq",
 179      "bplt",
 180      "bplteq",
 181      "addp",
 182      "mulp",
 183      "andp",
 184      "orp",
 185      "subp",
 186      "xorp",
 187      "loadp",
 188      "cpeq",
 189      "cpneq",
 190      "cpa",
 191      "cpaeq",
 192      "cpb",
 193      "cpbeq",
 194      "cpgt",
 195      "cpgteq",
 196      "cplt",
 197      "cplteq",
 198      "storep",
 199      "btps",
 200      "btpz",
 201      "btpnz",
 202      "baddpo",
 203      "baddps",
 204      "baddpz",
 205      "baddpnz",
 206      "tqs",
 207      "tqz",
 208      "tqnz",
 209      "peekq",
 210      "pokeq",
 211      "bqeq",
 212      "bqneq",
 213      "bqa",
 214      "bqaeq",
 215      "bqb",
 216      "bqbeq",
 217      "bqgt",
 218      "bqgteq",
 219      "bqlt",
 220      "bqlteq",
 221      "addq",
 222      "mulq",
 223      "andq",
 224      "orq",
 225      "subq",
 226      "xorq",
 227      "loadq",
 228      "cqeq",
 229      "cqneq",
 230      "cqa",
 231      "cqaeq",
 232      "cqb",
 233      "cqbeq",
 234      "cqgt",
 235      "cqgteq",
 236      "cqlt",
 237      "cqlteq",
 238      "storeq",
 239      "btqs",
 240      "btqz",
 241      "btqnz",
 242      "baddqo",
 243      "baddqs",
 244      "baddqz",
 245      "baddqnz",
 246      "bo",
 247      "bs",
 248      "bz",
 249      "bnz",
 250      "leai",
 251      "leap",
 252     ]
 253
 254 X86_INSTRUCTIONS =
 255     [
 256      "cdqi",
 257      "idivi",
 258      "resetX87Stack"
 259     ]
 260
 261 RISC_INSTRUCTIONS =
 262     [
 263      "smulli",  # Multiply two 32-bit words and produce a 64-bit word
 264      "addis",   # Add integers and set a flag.
 265      "subis",   # Same, but for subtraction.
 266      "oris",    # Same, but for bitwise or.
 267      "addps"    # addis but for pointers.
 268     ]
 269
 270 MIPS_INSTRUCTIONS =
 271     [
 272     "movz",
 273     "movn",
 274     "slt",
 275     "sltu",
 276     "pichdr",
 277     "pichdrra"
 278     ]
 279
 280 SH4_INSTRUCTIONS =
 281     [
 282     "shllx",
 283     "shlrx",
 284     "shld",
 285     "shad",
 286     "bdnan",
 287     "loaddReversedAndIncrementAddress",
 288     "storedReversedAndDecrementAddress",
 289     "ldspr",
 290     "stspr",
 291     "callf",
 292     "jmpf"
 293     ]
 294
 295 CXX_INSTRUCTIONS =
 296     [
 297      "cloopCrash",           # no operands
 298      "cloopCallJSFunction",  # operands: callee
 299      "cloopCallNative",      # operands: callee
 300      "cloopCallSlowPath",    # operands: callTarget, currentFrame, currentPC
 301
 302      # For debugging only:
 303      # Takes no operands but simply emits whatever follows in // comments as
 304      # a line of C++ code in the generated LLIntAssembly.h file. This can be
 305      # used to insert instrumentation into the interpreter loop to inspect
 306      # variables of interest. Do not leave these instructions in production
 307      # code.
 308      "cloopDo",              # no operands
 309     ]
 310
 311 INSTRUCTIONS = MACRO_INSTRUCTIONS + X86_INSTRUCTIONS + RISC_INSTRUCTIONS + MIPS_INSTRUCTIONS + SH4_INSTRUCTIONS + CXX_INSTRUCTIONS
 312
 313 INSTRUCTION_PATTERN = Regexp.new('\\A((' + INSTRUCTIONS.join(')|(') + '))\\Z')
 314
 315 def isBranch(instruction)
 316     instruction =~ /^b/
 317 end
 318
 319 def hasFallThrough(instruction)
 320     instruction != "ret" and instruction != "jmp"
 321 end
 322