diff options
Diffstat (limited to 'src/lopcodes.js')
| -rw-r--r-- | src/lopcodes.js | 76 |
1 files changed, 75 insertions, 1 deletions
diff --git a/src/lopcodes.js b/src/lopcodes.js index 1350468..5723abb 100644 --- a/src/lopcodes.js +++ b/src/lopcodes.js @@ -51,6 +51,79 @@ const OpCodes = [ "OP_EXTRAARG" ]; +/* +** masks for instruction properties. The format is: +** bits 0-1: op mode +** bits 2-3: C arg mode +** bits 4-5: B arg mode +** bit 6: instruction set register A +** bit 7: operator is a test (next instruction must be a jump) +*/ +const OpArgN = 0; /* argument is not used */ +const OpArgU = 1; /* argument is used */ +const OpArgR = 2; /* argument is a register or a jump offset */ +const OpArgK = 3; /* argument is a constant or register/constant */ + +/* basic instruction format */ +const iABC = 0; +const iABx = 1; +const iAsBx = 2; +const iAx = 3; + +const luaP_opmodes = [ + 0 << 7 | 1 << 6 | OpArgR << 4 | OpArgN << 2 | iABC, /* OP_MOVE */ + 0 << 7 | 1 << 6 | OpArgK << 4 | OpArgN << 2 | iABx, /* OP_LOADK */ + 0 << 7 | 1 << 6 | OpArgN << 4 | OpArgN << 2 | iABx, /* OP_LOADKX */ + 0 << 7 | 1 << 6 | OpArgU << 4 | OpArgU << 2 | iABC, /* OP_LOADBOOL */ + 0 << 7 | 1 << 6 | OpArgU << 4 | OpArgN << 2 | iABC, /* OP_LOADNIL */ + 0 << 7 | 1 << 6 | OpArgU << 4 | OpArgN << 2 | iABC, /* OP_GETUPVAL */ + 0 << 7 | 1 << 6 | OpArgU << 4 | OpArgK << 2 | iABC, /* OP_GETTABUP */ + 0 << 7 | 1 << 6 | OpArgR << 4 | OpArgK << 2 | iABC, /* OP_GETTABLE */ + 0 << 7 | 0 << 6 | OpArgK << 4 | OpArgK << 2 | iABC, /* OP_SETTABUP */ + 0 << 7 | 0 << 6 | OpArgU << 4 | OpArgN << 2 | iABC, /* OP_SETUPVAL */ + 0 << 7 | 0 << 6 | OpArgK << 4 | OpArgK << 2 | iABC, /* OP_SETTABLE */ + 0 << 7 | 1 << 6 | OpArgU << 4 | OpArgU << 2 | iABC, /* OP_NEWTABLE */ + 0 << 7 | 1 << 6 | OpArgR << 4 | OpArgK << 2 | iABC, /* OP_SELF */ + 0 << 7 | 1 << 6 | OpArgK << 4 | OpArgK << 2 | iABC, /* OP_ADD */ + 0 << 7 | 1 << 6 | OpArgK << 4 | OpArgK << 2 | iABC, /* OP_SUB */ + 0 << 7 | 1 << 6 | OpArgK << 4 | OpArgK << 2 | iABC, /* OP_MUL */ + 0 << 7 | 1 << 6 | OpArgK << 4 | OpArgK << 2 | iABC, /* OP_MOD */ + 0 << 7 | 1 << 6 | OpArgK << 4 | OpArgK << 2 | iABC, /* OP_POW */ + 0 << 7 | 1 << 6 | OpArgK << 4 | OpArgK << 2 | iABC, /* OP_DIV */ + 0 << 7 | 1 << 6 | OpArgK << 4 | OpArgK << 2 | iABC, /* OP_IDIV */ + 0 << 7 | 1 << 6 | OpArgK << 4 | OpArgK << 2 | iABC, /* OP_BAND */ + 0 << 7 | 1 << 6 | OpArgK << 4 | OpArgK << 2 | iABC, /* OP_BOR */ + 0 << 7 | 1 << 6 | OpArgK << 4 | OpArgK << 2 | iABC, /* OP_BXOR */ + 0 << 7 | 1 << 6 | OpArgK << 4 | OpArgK << 2 | iABC, /* OP_SHL */ + 0 << 7 | 1 << 6 | OpArgK << 4 | OpArgK << 2 | iABC, /* OP_SHR */ + 0 << 7 | 1 << 6 | OpArgR << 4 | OpArgN << 2 | iABC, /* OP_UNM */ + 0 << 7 | 1 << 6 | OpArgR << 4 | OpArgN << 2 | iABC, /* OP_BNOT */ + 0 << 7 | 1 << 6 | OpArgR << 4 | OpArgN << 2 | iABC, /* OP_NOT */ + 0 << 7 | 1 << 6 | OpArgR << 4 | OpArgN << 2 | iABC, /* OP_LEN */ + 0 << 7 | 1 << 6 | OpArgR << 4 | OpArgR << 2 | iABC, /* OP_CONCAT */ + 0 << 7 | 0 << 6 | OpArgR << 4 | OpArgN << 2 | iAsBx, /* OP_JMP */ + 1 << 7 | 0 << 6 | OpArgK << 4 | OpArgK << 2 | iABC, /* OP_EQ */ + 1 << 7 | 0 << 6 | OpArgK << 4 | OpArgK << 2 | iABC, /* OP_LT */ + 1 << 7 | 0 << 6 | OpArgK << 4 | OpArgK << 2 | iABC, /* OP_LE */ + 1 << 7 | 0 << 6 | OpArgN << 4 | OpArgU << 2 | iABC, /* OP_TEST */ + 1 << 7 | 1 << 6 | OpArgR << 4 | OpArgU << 2 | iABC, /* OP_TESTSET */ + 0 << 7 | 1 << 6 | OpArgU << 4 | OpArgU << 2 | iABC, /* OP_CALL */ + 0 << 7 | 1 << 6 | OpArgU << 4 | OpArgU << 2 | iABC, /* OP_TAILCALL */ + 0 << 7 | 0 << 6 | OpArgU << 4 | OpArgN << 2 | iABC, /* OP_RETURN */ + 0 << 7 | 1 << 6 | OpArgR << 4 | OpArgN << 2 | iAsBx, /* OP_FORLOOP */ + 0 << 7 | 1 << 6 | OpArgR << 4 | OpArgN << 2 | iAsBx, /* OP_FORPREP */ + 0 << 7 | 0 << 6 | OpArgN << 4 | OpArgU << 2 | iABC, /* OP_TFORCALL */ + 0 << 7 | 1 << 6 | OpArgR << 4 | OpArgN << 2 | iAsBx, /* OP_TFORLOOP */ + 0 << 7 | 0 << 6 | OpArgU << 4 | OpArgU << 2 | iABC, /* OP_SETLIST */ + 0 << 7 | 1 << 6 | OpArgU << 4 | OpArgN << 2 | iABx, /* OP_CLOSURE */ + 0 << 7 | 1 << 6 | OpArgU << 4 | OpArgN << 2 | iABC, /* OP_VARARG */ + 0 << 7 | 0 << 6 | OpArgU << 4 | OpArgU << 2 | iAx /* OP_EXTRAARG */ +]; + +const testAMode = function(m) { + return luaP_opmodes[m] & (1 << 6); +}; + const SIZE_C = 9; const SIZE_B = 9; const SIZE_Bx = (SIZE_C + SIZE_B); @@ -105,4 +178,5 @@ module.exports.MAXARG_C = MAXARG_C; module.exports.BITRK = BITRK; module.exports.ISK = ISK; module.exports.INDEXK = INDEXK; -module.exports.LFIELDS_PER_FLUSH = LFIELDS_PER_FLUSH;
\ No newline at end of file +module.exports.LFIELDS_PER_FLUSH = LFIELDS_PER_FLUSH; +module.exports.testAMode = testAMode;
\ No newline at end of file |