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/*jshint esversion: 6 */
"use strict";
const OpCodes = [
"OP_MOVE",
"OP_LOADK",
"OP_LOADKX",
"OP_LOADBOOL",
"OP_LOADNIL",
"OP_GETUPVAL",
"OP_GETTABUP",
"OP_GETTABLE",
"OP_SETTABUP",
"OP_SETUPVAL",
"OP_SETTABLE",
"OP_NEWTABLE",
"OP_SELF",
"OP_ADD",
"OP_SUB",
"OP_MUL",
"OP_MOD",
"OP_POW",
"OP_DIV",
"OP_IDIV",
"OP_BAND",
"OP_BOR",
"OP_BXOR",
"OP_SHL",
"OP_SHR",
"OP_UNM",
"OP_BNOT",
"OP_NOT",
"OP_LEN",
"OP_CONCAT",
"OP_JMP",
"OP_EQ",
"OP_LT",
"OP_LE",
"OP_TEST",
"OP_TESTSET",
"OP_CALL",
"OP_TAILCALL",
"OP_RETURN",
"OP_FORLOOP",
"OP_FORPREP",
"OP_TFORCALL",
"OP_TFORLOOP",
"OP_SETLIST",
"OP_CLOSURE",
"OP_VARARG",
"OP_EXTRAARG"
];
const OpCodesI = {
OP_MOVE: 0,
OP_LOADK: 1,
OP_LOADKX: 2,
OP_LOADBOOL: 3,
OP_LOADNIL: 4,
OP_GETUPVAL: 5,
OP_GETTABUP: 6,
OP_GETTABLE: 7,
OP_SETTABUP: 8,
OP_SETUPVAL: 9,
OP_SETTABLE: 10,
OP_NEWTABLE: 11,
OP_SELF: 12,
OP_ADD: 13,
OP_SUB: 14,
OP_MUL: 15,
OP_MOD: 16,
OP_POW: 17,
OP_DIV: 18,
OP_IDIV: 19,
OP_BAND: 20,
OP_BOR: 21,
OP_BXOR: 22,
OP_SHL: 23,
OP_SHR: 24,
OP_UNM: 25,
OP_BNOT: 26,
OP_NOT: 27,
OP_LEN: 28,
OP_CONCAT: 29,
OP_JMP: 30,
OP_EQ: 31,
OP_LT: 32,
OP_LE: 33,
OP_TEST: 34,
OP_TESTSET: 35,
OP_CALL: 36,
OP_TAILCALL: 37,
OP_RETURN: 38,
OP_FORLOOP: 39,
OP_FORPREP: 40,
OP_TFORCALL: 41,
OP_TFORLOOP: 42,
OP_SETLIST: 43,
OP_CLOSURE: 44,
OP_VARARG: 45,
OP_EXTRAARG: 46
};
/*
** 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 getOpMode = function(m) {
return luaP_opmodes[m] & 3;
};
const getBMode = function(m) {
return (luaP_opmodes[m] >> 4) & 3;
};
const getCMode = function(m) {
return (luaP_opmodes[m] >> 2) & 3;
};
const testAMode = function(m) {
return luaP_opmodes[m] & (1 << 6);
};
const testTMode = function(m) {
return luaP_opmodes[m] & (1 << 7);
};
const SIZE_C = 9;
const SIZE_B = 9;
const SIZE_Bx = (SIZE_C + SIZE_B);
const SIZE_A = 8;
const SIZE_Ax = (SIZE_C + SIZE_B + SIZE_A);
const SIZE_OP = 6;
const POS_OP = 0;
const POS_A = (POS_OP + SIZE_OP);
const POS_C = (POS_A + SIZE_A);
const POS_B = (POS_C + SIZE_C);
const POS_Bx = POS_C;
const POS_Ax = POS_A;
const MAXARG_Bx = ((1 << SIZE_Bx) - 1);
const MAXARG_sBx = (MAXARG_Bx >> 1); /* 'sBx' is signed */
const MAXARG_Ax = ((1<<SIZE_Ax)-1);
const MAXARG_A = ((1 << SIZE_A) - 1);
const MAXARG_B = ((1 << SIZE_B) - 1);
const MAXARG_C = ((1 << SIZE_C) - 1);
/* this bit 1 means constant (0 means register) */
const BITRK = (1 << (SIZE_B - 1));
const MAXINDEXRK = (BITRK - 1);
/*
** invalid register that fits in 8 bits
*/
const NO_REG = MAXARG_A;
/* test whether value is a constant */
const ISK = function (x) {
return x & BITRK;
};
/* gets the index of the constant */
const INDEXK = function (r) {
return r & ~BITRK;
};
/* code a constant index as a RK value */
const RKASK = function(x) {
return x | BITRK;
};
/* creates a mask with 'n' 1 bits at position 'p' */
const MASK1 = function(n, p) {
return ((~((~0)<<(n)))<<(p));
};
/* creates a mask with 'n' 0 bits at position 'p' */
const MASK0 = function(n, p) {
return (~MASK1(n, p));
};
const SET_OPCODE = function(i, o) {
i.code = (i.code & MASK0(SIZE_OP, POS_OP)) | ((o << POS_OP) & MASK1(SIZE_OP, POS_OP));
fullins(i);
};
const setarg = function(i, v, pos, size) {
i.code = (i.code & MASK0(size, pos)) | ((v << pos) & MASK1(size, pos));
fullins(i);
};
const SETARG_A = function(i,v) {
setarg(i, v, POS_A, SIZE_A);
};
const SETARG_B = function(i,v) {
setarg(i, v, POS_B, SIZE_B);
};
const SETARG_C = function(i,v) {
setarg(i, v, POS_C, SIZE_C);
};
const SETARG_Bx = function(i,v) {
setarg(i, v, POS_Bx, SIZE_Bx);
};
const SETARG_Ax = function(i,v) {
setarg(i, v, POS_Ax, SIZE_Ax);
};
const SETARG_sBx = function(i, b) {
SETARG_Bx(i, b + MAXARG_sBx);
};
/*
** Pre-calculate all possible part of the instruction
*/
const fullins = function(ins) {
if (typeof ins === "number") {
return {
code: ins,
opcode: (ins >> POS_OP) & MASK1(SIZE_OP, 0),
A: (ins >> POS_A) & MASK1(SIZE_A, 0),
B: (ins >> POS_B) & MASK1(SIZE_B, 0),
C: (ins >> POS_C) & MASK1(SIZE_C, 0),
Bx: (ins >> POS_Bx) & MASK1(SIZE_Bx, 0),
Ax: (ins >> POS_Ax) & MASK1(SIZE_Ax, 0),
sBx: ((ins >> POS_Bx) & MASK1(SIZE_Bx, 0)) - MAXARG_sBx
};
} else {
let i = ins.code;
ins.opcode = (i >> POS_OP) & MASK1(SIZE_OP, 0);
ins.A = (i >> POS_A) & MASK1(SIZE_A, 0);
ins.B = (i >> POS_B) & MASK1(SIZE_B, 0);
ins.C = (i >> POS_C) & MASK1(SIZE_C, 0);
ins.Bx = (i >> POS_Bx) & MASK1(SIZE_Bx, 0);
ins.Ax = (i >> POS_Ax) & MASK1(SIZE_Ax, 0);
ins.sBx = ((i >> POS_Bx) & MASK1(SIZE_Bx, 0)) - MAXARG_sBx;
return ins;
}
};
const CREATE_ABC = function(o, a, b, c) {
return fullins(o << POS_OP | a << POS_A | b << POS_B | c << POS_C);
};
const CREATE_ABx = function(o, a, bc) {
return fullins(o << POS_OP | a << POS_A | bc << POS_Bx);
};
const CREATE_Ax = function(o, a) {
return fullins(o << POS_OP | a << POS_Ax);
};
/* number of list items to accumulate before a SETLIST instruction */
const LFIELDS_PER_FLUSH = 50;
module.exports.BITRK = BITRK;
module.exports.CREATE_ABC = CREATE_ABC;
module.exports.CREATE_ABx = CREATE_ABx;
module.exports.CREATE_Ax = CREATE_Ax;
module.exports.INDEXK = INDEXK;
module.exports.ISK = ISK;
module.exports.LFIELDS_PER_FLUSH = LFIELDS_PER_FLUSH;
module.exports.MAXARG_A = MAXARG_A;
module.exports.MAXARG_Ax = MAXARG_Ax;
module.exports.MAXARG_B = MAXARG_B;
module.exports.MAXARG_Bx = MAXARG_Bx;
module.exports.MAXARG_C = MAXARG_C;
module.exports.MAXARG_sBx = MAXARG_sBx;
module.exports.MAXINDEXRK = MAXINDEXRK;
module.exports.NO_REG = NO_REG;
module.exports.OpArgK = OpArgK;
module.exports.OpArgN = OpArgN;
module.exports.OpArgR = OpArgR;
module.exports.OpArgU = OpArgU;
module.exports.OpCodes = OpCodes;
module.exports.OpCodesI = OpCodesI;
module.exports.POS_A = POS_A;
module.exports.POS_Ax = POS_Ax;
module.exports.POS_B = POS_B;
module.exports.POS_Bx = POS_Bx;
module.exports.POS_C = POS_C;
module.exports.POS_OP = POS_OP;
module.exports.RKASK = RKASK;
module.exports.SETARG_A = SETARG_A;
module.exports.SETARG_Ax = SETARG_Ax;
module.exports.SETARG_B = SETARG_B;
module.exports.SETARG_Bx = SETARG_Bx;
module.exports.SETARG_C = SETARG_C;
module.exports.SETARG_sBx = SETARG_sBx;
module.exports.SET_OPCODE = SET_OPCODE;
module.exports.SIZE_A = SIZE_A;
module.exports.SIZE_Ax = SIZE_Ax;
module.exports.SIZE_B = SIZE_B;
module.exports.SIZE_Bx = SIZE_Bx;
module.exports.SIZE_C = SIZE_C;
module.exports.SIZE_OP = SIZE_OP;
module.exports.fullins = fullins;
module.exports.getBMode = getBMode;
module.exports.getCMode = getCMode;
module.exports.getOpMode = getOpMode;
module.exports.iABC = iABC;
module.exports.iABx = iABx;
module.exports.iAsBx = iAsBx;
module.exports.iAx = iAx;
module.exports.testAMode = testAMode;
module.exports.testTMode = testTMode;
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