jsopcode.tbl

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/*
 * JavaScript operation bytecodes.  If you need to allocate a bytecode, look
 * for a name of the form JSOP_UNUSED* and claim it.  Otherwise, always add at
 * the end of the table.
 *
 * Includers must define an OPDEF macro of the following form:
 *
 * #define OPDEF(op,val,name,image,length,nuses,ndefs,prec,format) ...
 *
 * Selected arguments can be expanded in initializers.  The op argument is
 * expanded followed by comma in the JSOp enum (jsopcode.h), e.g.  The value
 * field must be dense for now, because jsopcode.c uses an OPDEF() expansion
 * inside the js_CodeSpec[] initializer.
 *
 * Field        Description
 * op           Bytecode name, which is the JSOp enumerator name
 * value        Bytecode value, which is the JSOp enumerator value
 * name         C string containing name for disassembler
 * image        C string containing "image" for pretty-printer, null if ugly
 * length       Number of bytes including any immediate operands
 * nuses        Number of stack slots consumed by bytecode, -1 if variadic
 * ndefs        Number of stack slots produced by bytecode
 * prec         Operator precedence, zero if not an operator
 * format       Bytecode plus immediate operand encoding format
 *
 * This file is best viewed with 116 columns:
01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345
 */

/* legend: op         val name          image       len use def prec  format */

/* Longstanding JavaScript bytecodes. */
OPDEF(JSOP_NOP,       0,  "nop",        NULL,         1,  0,  0,  0,  JOF_BYTE)
OPDEF(JSOP_PUSH,      1,  "push",       NULL,         1,  0,  1,  0,  JOF_BYTE)
OPDEF(JSOP_POPV,      2,  "popv",       NULL,         1,  1,  0,  0,  JOF_BYTE)
OPDEF(JSOP_ENTERWITH, 3,  "enterwith",  NULL,         1,  1,  1,  0,  JOF_BYTE)
OPDEF(JSOP_LEAVEWITH, 4,  "leavewith",  NULL,         1,  1,  0,  0,  JOF_BYTE)
OPDEF(JSOP_RETURN,    5,  "return",     NULL,         1,  1,  0,  0,  JOF_BYTE)
OPDEF(JSOP_GOTO,      6,  "goto",       NULL,         3,  0,  0,  0,  JOF_JUMP)
OPDEF(JSOP_IFEQ,      7,  "ifeq",       NULL,         3,  1,  0,  0,  JOF_JUMP|JOF_DETECTING)
OPDEF(JSOP_IFNE,      8,  "ifne",       NULL,         3,  1,  0,  0,  JOF_JUMP)

/* Get the arguments object for the current, lightweight function activation. */
OPDEF(JSOP_ARGUMENTS, 9, js_arguments_str, js_arguments_str, 1, 0, 1, 12, JOF_BYTE)

/* ECMA-compliant for-in loop with argument or local variable loop control. */
OPDEF(JSOP_FORARG,    10, "forarg",     NULL,         3,  0,  1,  0,  JOF_QARG|JOF_NAME|JOF_FOR)
OPDEF(JSOP_FORVAR,    11, "forvar",     NULL,         3,  0,  1,  0,  JOF_QVAR|JOF_NAME|JOF_FOR)

/* More longstanding bytecodes. */
OPDEF(JSOP_DUP,       12, "dup",        NULL,         1,  1,  2,  0,  JOF_BYTE)
OPDEF(JSOP_DUP2,      13, "dup2",       NULL,         1,  2,  4,  0,  JOF_BYTE)
OPDEF(JSOP_SETCONST,  14, "setconst",   NULL,         3,  1,  1,  1,  JOF_CONST|JOF_NAME|JOF_SET|JOF_ASSIGNING)
OPDEF(JSOP_BITOR,     15, "bitor",      "|",          1,  2,  1,  2,  JOF_BYTE|JOF_LEFTASSOC)
OPDEF(JSOP_BITXOR,    16, "bitxor",     "^",          1,  2,  1,  3,  JOF_BYTE|JOF_LEFTASSOC)
OPDEF(JSOP_BITAND,    17, "bitand",     "&",          1,  2,  1,  4,  JOF_BYTE|JOF_LEFTASSOC)
OPDEF(JSOP_EQ,        18, "eq",         "==",         1,  2,  1,  5,  JOF_BYTE|JOF_LEFTASSOC|JOF_DETECTING)
OPDEF(JSOP_NE,        19, "ne",         "!=",         1,  2,  1,  5,  JOF_BYTE|JOF_LEFTASSOC|JOF_DETECTING)
OPDEF(JSOP_LT,        20, "lt",         "<",          1,  2,  1,  6,  JOF_BYTE|JOF_LEFTASSOC)
OPDEF(JSOP_LE,        21, "le",         "<=",         1,  2,  1,  6,  JOF_BYTE|JOF_LEFTASSOC)
OPDEF(JSOP_GT,        22, "gt",         ">",          1,  2,  1,  6,  JOF_BYTE|JOF_LEFTASSOC)
OPDEF(JSOP_GE,        23, "ge",         ">=",         1,  2,  1,  6,  JOF_BYTE|JOF_LEFTASSOC)
OPDEF(JSOP_LSH,       24, "lsh",        "<<",         1,  2,  1,  7,  JOF_BYTE|JOF_LEFTASSOC)
OPDEF(JSOP_RSH,       25, "rsh",        ">>",         1,  2,  1,  7,  JOF_BYTE|JOF_LEFTASSOC)
OPDEF(JSOP_URSH,      26, "ursh",       ">>>",        1,  2,  1,  7,  JOF_BYTE|JOF_LEFTASSOC)
OPDEF(JSOP_ADD,       27, "add",        "+",          1,  2,  1,  8,  JOF_BYTE|JOF_LEFTASSOC)
OPDEF(JSOP_SUB,       28, "sub",        "-",          1,  2,  1,  8,  JOF_BYTE|JOF_LEFTASSOC)
OPDEF(JSOP_MUL,       29, "mul",        "*",          1,  2,  1,  9,  JOF_BYTE|JOF_LEFTASSOC)
OPDEF(JSOP_DIV,       30, "div",        "/",          1,  2,  1,  9,  JOF_BYTE|JOF_LEFTASSOC)
OPDEF(JSOP_MOD,       31, "mod",        "%",          1,  2,  1,  9,  JOF_BYTE|JOF_LEFTASSOC)
OPDEF(JSOP_NOT,       32, "not",        "!",          1,  1,  1, 10,  JOF_BYTE|JOF_DETECTING)
OPDEF(JSOP_BITNOT,    33, "bitnot",     "~",          1,  1,  1, 10,  JOF_BYTE)
OPDEF(JSOP_NEG,       34, "neg",        "-",          1,  1,  1, 10,  JOF_BYTE)
OPDEF(JSOP_NEW,       35, js_new_str,   NULL,         3, -1,  1, 10,  JOF_UINT16)
OPDEF(JSOP_DELNAME,   36, "delname",    NULL,         3,  0,  1, 10,  JOF_CONST|JOF_NAME|JOF_DEL)
OPDEF(JSOP_DELPROP,   37, "delprop",    NULL,         3,  1,  1, 10,  JOF_CONST|JOF_PROP|JOF_DEL)
OPDEF(JSOP_DELELEM,   38, "delelem",    NULL,         1,  2,  1, 10,  JOF_BYTE |JOF_ELEM|JOF_DEL)
OPDEF(JSOP_TYPEOF,    39, js_typeof_str,NULL,         1,  1,  1, 10,  JOF_BYTE|JOF_DETECTING)
OPDEF(JSOP_VOID,      40, js_void_str,  NULL,         1,  1,  1, 10,  JOF_BYTE)
OPDEF(JSOP_INCNAME,   41, "incname",    NULL,         3,  0,  1, 10,  JOF_CONST|JOF_NAME|JOF_INC)
OPDEF(JSOP_INCPROP,   42, "incprop",    NULL,         3,  1,  1, 10,  JOF_CONST|JOF_PROP|JOF_INC)
OPDEF(JSOP_INCELEM,   43, "incelem",    NULL,         1,  2,  1, 10,  JOF_BYTE |JOF_ELEM|JOF_INC)
OPDEF(JSOP_DECNAME,   44, "decname",    NULL,         3,  0,  1, 10,  JOF_CONST|JOF_NAME|JOF_DEC)
OPDEF(JSOP_DECPROP,   45, "decprop",    NULL,         3,  1,  1, 10,  JOF_CONST|JOF_PROP|JOF_DEC)
OPDEF(JSOP_DECELEM,   46, "decelem",    NULL,         1,  2,  1, 10,  JOF_BYTE |JOF_ELEM|JOF_DEC)
OPDEF(JSOP_NAMEINC,   47, "nameinc",    NULL,         3,  0,  1, 10,  JOF_CONST|JOF_NAME|JOF_INC|JOF_POST)
OPDEF(JSOP_PROPINC,   48, "propinc",    NULL,         3,  1,  1, 10,  JOF_CONST|JOF_PROP|JOF_INC|JOF_POST)
OPDEF(JSOP_ELEMINC,   49, "eleminc",    NULL,         1,  2,  1, 10,  JOF_BYTE |JOF_ELEM|JOF_INC|JOF_POST)
OPDEF(JSOP_NAMEDEC,   50, "namedec",    NULL,         3,  0,  1, 10,  JOF_CONST|JOF_NAME|JOF_DEC|JOF_POST)
OPDEF(JSOP_PROPDEC,   51, "propdec",    NULL,         3,  1,  1, 10,  JOF_CONST|JOF_PROP|JOF_DEC|JOF_POST)
OPDEF(JSOP_ELEMDEC,   52, "elemdec",    NULL,         1,  2,  1, 10,  JOF_BYTE |JOF_ELEM|JOF_DEC|JOF_POST)
OPDEF(JSOP_GETPROP,   53, "getprop",    NULL,         3,  1,  1, 11,  JOF_CONST|JOF_PROP)
OPDEF(JSOP_SETPROP,   54, "setprop",    NULL,         3,  2,  1,  1,  JOF_CONST|JOF_PROP|JOF_SET|JOF_ASSIGNING|JOF_DETECTING)
OPDEF(JSOP_GETELEM,   55, "getelem",    NULL,         1,  2,  1, 11,  JOF_BYTE |JOF_ELEM|JOF_LEFTASSOC)
OPDEF(JSOP_SETELEM,   56, "setelem",    NULL,         1,  3,  1,  1,  JOF_BYTE |JOF_ELEM|JOF_SET|JOF_ASSIGNING|JOF_DETECTING)
OPDEF(JSOP_PUSHOBJ,   57, "pushobj",    NULL,         1,  0,  1,  0,  JOF_BYTE)
OPDEF(JSOP_CALL,      58, "call",       NULL,         3, -1,  1, 11,  JOF_UINT16)
OPDEF(JSOP_NAME,      59, "name",       NULL,         3,  0,  1, 12,  JOF_CONST|JOF_NAME)
OPDEF(JSOP_NUMBER,    60, "number",     NULL,         3,  0,  1, 12,  JOF_CONST)
OPDEF(JSOP_STRING,    61, "string",     NULL,         3,  0,  1, 12,  JOF_CONST)
OPDEF(JSOP_ZERO,      62, "zero",       "0",          1,  0,  1, 12,  JOF_BYTE)
OPDEF(JSOP_ONE,       63, "one",        "1",          1,  0,  1, 12,  JOF_BYTE)
OPDEF(JSOP_NULL,      64, js_null_str,  js_null_str,  1,  0,  1, 12,  JOF_BYTE)
OPDEF(JSOP_THIS,      65, js_this_str,  js_this_str,  1,  0,  1, 12,  JOF_BYTE)
OPDEF(JSOP_FALSE,     66, js_false_str, js_false_str, 1,  0,  1, 12,  JOF_BYTE)
OPDEF(JSOP_TRUE,      67, js_true_str,  js_true_str,  1,  0,  1, 12,  JOF_BYTE)
OPDEF(JSOP_OR,        68, "or",         NULL,         3,  1,  0,  0,  JOF_JUMP|JOF_DETECTING)
OPDEF(JSOP_AND,       69, "and",        NULL,         3,  1,  0,  0,  JOF_JUMP|JOF_DETECTING)

/* The switch bytecodes have variable length. */
OPDEF(JSOP_TABLESWITCH,  70, "tableswitch",  NULL,   -1,  1,  0,  0,  JOF_TABLESWITCH)
OPDEF(JSOP_LOOKUPSWITCH, 71, "lookupswitch", NULL,   -1,  1,  0,  0,  JOF_LOOKUPSWITCH)

/* New, infallible/transitive identity ops. */
OPDEF(JSOP_NEW_EQ,    72, "eq",         NULL,         1,  2,  1,  5,  JOF_BYTE|JOF_DETECTING)
OPDEF(JSOP_NEW_NE,    73, "ne",         NULL,         1,  2,  1,  5,  JOF_BYTE|JOF_DETECTING)

/* Lexical closure constructor. */
OPDEF(JSOP_CLOSURE,   74, "closure",    NULL,         3,  0,  0,  0,  JOF_CONST)

/* Export and import ops. */
OPDEF(JSOP_EXPORTALL, 75, "exportall",  NULL,         1,  0,  0,  0,  JOF_BYTE)
OPDEF(JSOP_EXPORTNAME,76, "exportname", NULL,         3,  0,  0,  0,  JOF_CONST|JOF_NAME)
OPDEF(JSOP_IMPORTALL, 77, "importall",  NULL,         1,  1,  0,  0,  JOF_BYTE)
OPDEF(JSOP_IMPORTPROP,78, "importprop", NULL,         3,  1,  0,  0,  JOF_CONST|JOF_PROP|JOF_IMPORT)
OPDEF(JSOP_IMPORTELEM,79, "importelem", NULL,         1,  2,  0,  0,  JOF_BYTE |JOF_ELEM|JOF_IMPORT)

/* Push object literal. */
OPDEF(JSOP_OBJECT,    80, "object",     NULL,         3,  0,  1, 12,  JOF_CONST)