/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 *
 * The contents of this file are subject to the Netscape Public
 * License Version 1.1 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.mozilla.org/NPL/
 *
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 *
 * The Original Code is Mozilla Communicator client code, released
 * March 31, 1998.
 *
 * The Initial Developer of the Original Code is Netscape
 * Communications Corporation.  Portions created by Netscape are
 * Copyright (C) 1998 Netscape Communications Corporation. All
 * Rights Reserved.
 *
 * Contributor(s): 
 *
 * Alternatively, the contents of this file may be used under the
 * terms of the GNU Public License (the "GPL"), in which case the
 * provisions of the GPL are applicable instead of those above.
 * If you wish to allow use of your version of this file only
 * under the terms of the GPL and not to allow others to use your
 * version of this file under the NPL, indicate your decision by
 * deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL.  If you do not delete
 * the provisions above, a recipient may use your version of this
 * file under either the NPL or the GPL.
 */

/*
 * 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)
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)
OPDEF(JSOP_NE,        19, "ne",         "!=",         1,  2,  1,  5,  JOF_BYTE|JOF_LEFTASSOC)
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)
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)
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)
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)
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)
OPDEF(JSOP_AND,       69, "and",        NULL,         3,  1,  0,  0,  JOF_JUMP)

/* 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)
OPDEF(JSOP_NEW_NE,    73, "ne",         NULL,         1,  2,  1,  5,  JOF_BYTE)

/* 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)

/* Pop value and discard it. */
OPDEF(JSOP_POP,       81, "pop",        NULL,         1,  1,  0,  0,  JOF_BYTE)

/* Convert value to number, for unary +. */
OPDEF(JSOP_POS,       82, "pos",        "+",          1,  1,  1, 10,  JOF_BYTE)

/* Trap into debugger for breakpoint, etc. */
OPDEF(JSOP_TRAP,      83, "trap",       NULL,         1,  0,  0,  0,  JOF_BYTE)

/* Fast get/set ops for function arguments and local variables. */
OPDEF(JSOP_GETARG,    84, "getarg",     NULL,         3,  0,  1, 12,  JOF_QARG |JOF_NAME)
OPDEF(JSOP_SETARG,    85, "setarg",     NULL,         3,  1,  1,  1,  JOF_QARG |JOF_NAME|JOF_SET|JOF_ASSIGNING)
OPDEF(JSOP_GETVAR,    86, "getvar",     NULL,         3,  0,  1, 12,  JOF_QVAR |JOF_NAME)
OPDEF(JSOP_SETVAR,    87, "setvar",     NULL,         3,  1,  1,  1,  JOF_QVAR |JOF_NAME|JOF_SET|JOF_ASSIGNING)

/* Push unsigned 16-bit int constant. */
OPDEF(JSOP_UINT16,    88, "uint16",     NULL,         3,  0,  1, 12,  JOF_UINT16)

/* Object and array literal support. */
OPDEF(JSOP_NEWINIT,   89, "newinit",    NULL,         1,  2,  1, 10,  JOF_BYTE)
OPDEF(JSOP_ENDINIT,   90, "endinit",    NULL,         1,  0,  0,  0,  JOF_BYTE)
OPDEF(JSOP_INITPROP,  91, "initprop",   NULL,         3,  1,  0,  0,  JOF_CONST|JOF_PROP)
OPDEF(JSOP_INITELEM,  92, "initelem",   NULL,         1,  2,  0,  0,  JOF_BYTE |JOF_ELEM)
OPDEF(JSOP_DEFSHARP,  93, "defsharp",   NULL,         3,  0,  0,  0,  JOF_UINT16)
OPDEF(JSOP_USESHARP,  94, "usesharp",   NULL,         3,  0,  1,  0,  JOF_UINT16)

/* Fast inc/dec ops for args and local vars. */
OPDEF(JSOP_INCARG,    95, "incarg",     NULL,         3,  0,  1, 10,  JOF_QARG |JOF_NAME|JOF_INC)
OPDEF(JSOP_INCVAR,    96, "incvar",     NULL,         3,  0,  1, 10,  JOF_QVAR |JOF_NAME|JOF_INC)
OPDEF(JSOP_DECARG,    97, "decarg",     NULL,         3,  0,  1, 10,  JOF_QARG |JOF_NAME|JOF_DEC)
OPDEF(JSOP_DECVAR,    98, "decvar",     NULL,         3,  0,  1, 10,  JOF_QVAR |JOF_NAME|JOF_DEC)
OPDEF(JSOP_ARGINC,    99, "arginc",     NULL,         3,  0,  1, 10,  JOF_QARG |JOF_NAME|JOF_INC|JOF_POST)
OPDEF(JSOP_VARINC,    100,"varinc",     NULL,         3,  0,  1, 10,  JOF_QVAR |JOF_NAME|JOF_INC|JOF_POST)
OPDEF(JSOP_ARGDEC,    101,"argdec",     NULL,         3,  0,  1, 10,  JOF_QARG |JOF_NAME|JOF_DEC|JOF_POST)
OPDEF(JSOP_VARDEC,    102,"vardec",     NULL,         3,  0,  1, 10,  JOF_QVAR |JOF_NAME|JOF_DEC|JOF_POST)

/* ECMA-compliant for/in ops. */
OPDEF(JSOP_TOOBJECT,  103,"toobject",   NULL,         1,  1,  1,  0,  JOF_BYTE)
OPDEF(JSOP_FORNAME,   104,"forname",    NULL,         3,  0,  1,  0,  JOF_CONST|JOF_NAME|JOF_FOR)
OPDEF(JSOP_FORPROP,   105,"forprop",    NULL,         3,  1,  1,  0,  JOF_CONST|JOF_PROP|JOF_FOR)
OPDEF(JSOP_FORELEM,   106,"forelem",    NULL,         1,  2,  4,  0,  JOF_BYTE |JOF_ELEM|JOF_FOR)
OPDEF(JSOP_POP2,      107,"pop2",       NULL,         1,  2,  0,  0,  JOF_BYTE)

/* ECMA-compliant assignment ops. */
OPDEF(JSOP_BINDNAME,  108,"bindname",   NULL,         3,  0,  1,  0,  JOF_CONST|JOF_NAME|JOF_ASSIGNING)
OPDEF(JSOP_SETNAME,   109,"setname",    NULL,         3,  2,  1,  1,  JOF_CONST|JOF_NAME|JOF_SET|JOF_ASSIGNING)

/* Exception handling ops. */
OPDEF(JSOP_THROW,     110,"throw",      NULL,         1,  1,  0,  0,  JOF_BYTE)

/* 'in' and 'instanceof' ops. */
OPDEF(JSOP_IN,        111,js_in_str,    js_in_str,    1,  2,  1,  6,  JOF_BYTE|JOF_LEFTASSOC)
OPDEF(JSOP_INSTANCEOF,112,js_instanceof_str,js_instanceof_str,1,2,1,6,JOF_BYTE|JOF_LEFTASSOC)

/* debugger op */
OPDEF(JSOP_DEBUGGER,  113,"debugger",   NULL,         1,  0,  0,  0,  JOF_BYTE)

/* gosub/retsub for finally handling */
OPDEF(JSOP_GOSUB,     114,"gosub",      NULL,         3,  0,  1,  0,  JOF_JUMP)
OPDEF(JSOP_RETSUB,    115,"retsub",     NULL,         1,  1,  0,  0,  JOF_BYTE)

/* More exception handling ops. */
OPDEF(JSOP_EXCEPTION, 116,"exception",  NULL,         1,  0,  1,  0,  JOF_BYTE)
OPDEF(JSOP_SETSP,     117,"setsp",      NULL,         3,  0,  0,  0,  JOF_UINT16)

/*
 * ECMA-compliant switch statement ops.
 * CONDSWITCH is a decompilable NOP; CASE is ===, POP, jump if true, re-push
 * lval if false; and DEFAULT is POP lval and GOTO.
 */
OPDEF(JSOP_CONDSWITCH,118,"condswitch", NULL,         1,  0,  0,  0,  JOF_BYTE)
OPDEF(JSOP_CASE,      119,"case",       NULL,         3,  1,  0,  0,  JOF_JUMP)
OPDEF(JSOP_DEFAULT,   120,"default",    NULL,         3,  1,  0,  0,  JOF_JUMP)

/*
 * ECMA-compliant call to eval op
 */
OPDEF(JSOP_EVAL,      121,"eval",       NULL,         3, -1,  1, 11,  JOF_UINT16)

/*
 * ECMA-compliant helper for 'for (x[i] in o)' loops.
 */
OPDEF(JSOP_ENUMELEM,  122,"enumelem",   NULL,         1,  3,  0,  1,  JOF_BYTE |JOF_SET|JOF_ASSIGNING)

/*
 * Getter and setter prefix bytecodes.  These modify the next bytecode, either
 * an assignment or a property initializer code, which then defines a property
 * getter or setter.
 */
OPDEF(JSOP_GETTER,    123,js_getter_str,js_getter_str,1,  0,  0,  0,  JOF_BYTE)
OPDEF(JSOP_SETTER,    124,js_setter_str,js_setter_str,1,  0,  0,  0,  JOF_BYTE)

/*
 * Prolog bytecodes for defining function, var, and const names.
 */
OPDEF(JSOP_DEFFUN,    125,"deffun",     NULL,         3,  0,  0,  0,  JOF_CONST)
OPDEF(JSOP_DEFCONST,  126,"defconst",   NULL,         3,  0,  0,  0,  JOF_CONST|JOF_NAME)
OPDEF(JSOP_DEFVAR,    127,"defvar",     NULL,         3,  0,  0,  0,  JOF_CONST|JOF_NAME)

/* Auto-clone (if needed due to re-parenting) and push an anonymous function. */
OPDEF(JSOP_ANONFUNOBJ,  128, "anonfunobj",  NULL,     3,  0,  1, 12,  JOF_CONST)

/* ECMA ed. 3 named function expression. */
OPDEF(JSOP_NAMEDFUNOBJ, 129, "namedfunobj", NULL,     3,  0,  1, 12,  JOF_CONST)

/* Like JSOP_INITPROP, but specialized to make a DontDelete property for ECMA ed. 3 catch variables. */
OPDEF(JSOP_INITCATCHVAR,130, "initcatchvar",NULL,     3,  1,  0,  0,  JOF_CONST|JOF_PROP)

/* ECMA-mandated parenthesization opcode, which nulls the reference base register, obj; see jsinterp.c. */
OPDEF(JSOP_GROUP,       131, "group",       NULL,     1,  0,  0,  0,  JOF_BYTE)

/* Host object extension: given 'o.item(i) = j', the left-hand side compiles JSOP_SETCALL, rather than JSOP_CALL. */
OPDEF(JSOP_SETCALL,     132, "setcall",     NULL,     3, -1,  2, 11,  JOF_UINT16|JOF_SET|JOF_ASSIGNING)

/*
 * Exception handling no-ops, for more economical byte-coding than SRC_TRYFIN
 * srcnote-annotated JSOP_NOPs.
 */
OPDEF(JSOP_TRY,         133,"try",        NULL,       1,  0,  0,  0,  JOF_BYTE)
OPDEF(JSOP_FINALLY,     134,"finally",    NULL,       1,  0,  0,  0,  JOF_BYTE)

/*
 * Swap the top two stack elements.
 * N.B. JSOP_SWAP doesn't swap the corresponding pc stack generating pcs, as
 * they're not needed for the current use of preserving the top-of-stack return
 * value when popping scopes while returning from catch blocks.
 */
OPDEF(JSOP_SWAP,        135,"swap",       NULL,       1,  2,  2,  0,  JOF_BYTE)

/*
 * Bytecodes that avoid making an arguments object in most cases:
 * JSOP_ARGSUB gets arguments[i] from fp->argv, iff i is in [0, fp->argc-1].
 * JSOP_ARGCNT returns fp->argc.
 */
OPDEF(JSOP_ARGSUB,      136,"argsub",     NULL,       3,  0,  1, 12,  JOF_QARG |JOF_NAME)
OPDEF(JSOP_ARGCNT,      137,"argcnt",     NULL,       1,  0,  1, 12,  JOF_BYTE)

/*
 * Define a local function object as a local variable.
 * The local variable's slot number is the first immediate two-byte operand.
 * The function object's atom index is the second immediate operand.
 */
OPDEF(JSOP_DEFLOCALFUN, 138,"deflocalfun",NULL,       5,  0,  0,  0,  JOF_DEFLOCALVAR)

/* Extended jumps. */
OPDEF(JSOP_GOTOX,         139,"gotox",    NULL,       5,  0,  0,  0,  JOF_JUMPX)
OPDEF(JSOP_IFEQX,         140,"ifeqx",    NULL,       5,  1,  0,  0,  JOF_JUMPX)
OPDEF(JSOP_IFNEX,         141,"ifnex",    NULL,       5,  1,  0,  0,  JOF_JUMPX)
OPDEF(JSOP_ORX,           142,"orx",      NULL,       5,  1,  0,  0,  JOF_JUMPX)
OPDEF(JSOP_ANDX,          143,"andx",     NULL,       5,  1,  0,  0,  JOF_JUMPX)
OPDEF(JSOP_GOSUBX,        144,"gosubx",   NULL,       5,  0,  1,  0,  JOF_JUMPX)
OPDEF(JSOP_CASEX,         145,"casex",    NULL,       5,  1,  0,  0,  JOF_JUMPX)
OPDEF(JSOP_DEFAULTX,      146,"defaultx", NULL,       5,  1,  0,  0,  JOF_JUMPX)
OPDEF(JSOP_TABLESWITCHX,  147,"tableswitchx",NULL,   -1,  1,  0,  0,  JOF_TABLESWITCHX)
OPDEF(JSOP_LOOKUPSWITCHX, 148,"lookupswitchx",NULL,  -1,  1,  0,  0,  JOF_LOOKUPSWITCHX)

/* Placeholders for a real jump opcode set during backpatch chain fixup. */
OPDEF(JSOP_BACKPATCH,     149,"backpatch",NULL,       3,  0,  0,  0,  JOF_JUMP|JOF_BACKPATCH)
OPDEF(JSOP_BACKPATCH_POP, 150,"backpatch_pop",NULL,   3,  1,  0,  0,  JOF_JUMP|JOF_BACKPATCH)
OPDEF(JSOP_BACKPATCH_PUSH,151,"backpatch_push",NULL,  3,  0,  1,  0,  JOF_JUMP|JOF_BACKPATCH)

/* Set and get return value pseudo-register in stack frame. */
OPDEF(JSOP_SETRVAL,       152,"setrval",  NULL,       1,  1,  0,  0,  JOF_BYTE)
OPDEF(JSOP_RETRVAL,       153,"retrval",  NULL,       1,  0,  0,  0,  JOF_BYTE)
