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1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
2 * vim: set ts=8 sw=4 et tw=0 ft=C:
3 *
4 * ***** BEGIN LICENSE BLOCK *****
5 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
6 *
7 * The contents of this file are subject to the Mozilla Public License Version
8 * 1.1 (the "License"); you may not use this file except in compliance with
9 * the License. You may obtain a copy of the License at
10 * http://www.mozilla.org/MPL/
11 *
12 * Software distributed under the License is distributed on an "AS IS" basis,
13 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
14 * for the specific language governing rights and limitations under the
15 * License.
16 *
17 * The Original Code is Mozilla Communicator client code, released
18 * March 31, 1998.
19 *
20 * The Initial Developer of the Original Code is
21 * Netscape Communications Corporation.
22 * Portions created by the Initial Developer are Copyright (C) 1998
23 * the Initial Developer. All Rights Reserved.
24 *
25 * Contributor(s):
26 *
27 * Alternatively, the contents of this file may be used under the terms of
28 * either of the GNU General Public License Version 2 or later (the "GPL"),
29 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
30 * in which case the provisions of the GPL or the LGPL are applicable instead
31 * of those above. If you wish to allow use of your version of this file only
32 * under the terms of either the GPL or the LGPL, and not to allow others to
33 * use your version of this file under the terms of the MPL, indicate your
34 * decision by deleting the provisions above and replace them with the notice
35 * and other provisions required by the GPL or the LGPL. If you do not delete
36 * the provisions above, a recipient may use your version of this file under
37 * the terms of any one of the MPL, the GPL or the LGPL.
38 *
39 * ***** END LICENSE BLOCK ***** */
41 /*
42 * JavaScript operation bytecodes. If you need to allocate a bytecode, look
43 * for a name of the form JSOP_UNUSED* and claim it. Otherwise, always add at
44 * the end of the table.
45 *
46 * Includers must define an OPDEF macro of the following form:
47 *
48 * #define OPDEF(op,val,name,image,length,nuses,ndefs,prec,format) ...
49 *
50 * Selected arguments can be expanded in initializers. The op argument is
51 * expanded followed by comma in the JSOp enum (jsopcode.h), e.g. The value
52 * field must be dense for now, because jsopcode.c uses an OPDEF() expansion
53 * inside the js_CodeSpec[] initializer.
54 *
55 * Field Description
56 * op Bytecode name, which is the JSOp enumerator name
57 * value Bytecode value, which is the JSOp enumerator value
58 * name C string containing name for disassembler
59 * image C string containing "image" for pretty-printer, null if ugly
60 * length Number of bytes including any immediate operands
61 * nuses Number of stack slots consumed by bytecode, -1 if variadic
62 * ndefs Number of stack slots produced by bytecode
63 * prec Operator precedence, zero if not an operator
64 * format Bytecode plus immediate operand encoding format
65 *
66 * Precedence Operators Opcodes
67 * 1 let (x = y) z, yield w JSOP_LEAVEBLOCKEXPR, JSOP_YIELD
68 * 2 , JSOP_POP with SRC_PCDELTA, JSOP_RETURN
69 * 3 =, +=, etc. JSOP_SETNAME, etc. (all JOF_ASSIGNING)
70 * 4 ?: JSOP_IFEQ, JSOP_IFEQX
71 * 5 || JSOP_OR, JSOP_ORX
72 * 6 && JSOP_AND, JSOP_ANDX
73 * 7 | JSOP_BITOR
74 * 8 ^ JSOP_BITXOR
75 * 9 & JSOP_BITAND
76 * 10 ==, !=, etc. JSOP_EQ, JSOP_NE, etc.
77 * 11 <, in, etc. JSOP_LT, JSOP_IN, etc.
78 * 12 <<, >>, >>> JSOP_LSH, JSOP_RSH, JSOP_URSH
79 * 13 +, -, etc. JSOP_ADD, JSOP_SUB, etc.
80 * 14 *, /, % JSOP_MUL, JSOP_DIV, JSOP_MOD
81 * 15 !, ~, etc. JSOP_NOT, JSOP_BITNOT, etc.
82 * 16 3.14, 0, etc. JSOP_DOUBLE, JSOP_ZERO, etc.
83 * 17 delete, new JSOP_DEL*, JSOP_NEW
84 * 18 x.y, f(), etc. JSOP_GETPROP, JSOP_CALL, etc.
85 * 19 x, null, etc. JSOP_NAME, JSOP_NULL, etc.
86 *
87 * The push-numeric-constant operators, JSOP_ZERO, JSOP_DOUBLE, etc., have
88 * lower precedence than the member operators emitted for the . operator, to
89 * cause the decompiler to parenthesize the . left operand, e.g. (0).foo.
90 * Otherwise the . could be taken as a decimal point. We use the same level
91 * 16 for function expressions too, to force parenthesization.
92 *
93 * This file is best viewed with 128 columns:
94 12345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678
95 */
97 /* legend: op val name image len use def prec format */
99 /* Longstanding JavaScript bytecodes. */
100 OPDEF(JSOP_NOP, 0, "nop", NULL, 1, 0, 0, 0, JOF_BYTE)
101 OPDEF(JSOP_PUSH, 1, "push", NULL, 1, 0, 1, 0, JOF_BYTE)
102 OPDEF(JSOP_POPV, 2, "popv", NULL, 1, 1, 0, 2, JOF_BYTE)
103 OPDEF(JSOP_ENTERWITH, 3, "enterwith", NULL, 1, 1, 1, 0, JOF_BYTE|JOF_PARENHEAD)
104 OPDEF(JSOP_LEAVEWITH, 4, "leavewith", NULL, 1, 1, 0, 0, JOF_BYTE)
105 OPDEF(JSOP_RETURN, 5, "return", NULL, 1, 1, 0, 2, JOF_BYTE)
106 OPDEF(JSOP_GOTO, 6, "goto", NULL, 3, 0, 0, 0, JOF_JUMP)
107 OPDEF(JSOP_IFEQ, 7, "ifeq", NULL, 3, 1, 0, 4, JOF_JUMP|JOF_DETECTING)
108 OPDEF(JSOP_IFNE, 8, "ifne", NULL, 3, 1, 0, 0, JOF_JUMP|JOF_PARENHEAD)
110 /* Get the arguments object for the current, lightweight function activation. */
111 OPDEF(JSOP_ARGUMENTS, 9, js_arguments_str, js_arguments_str, 1, 0, 1, 18, JOF_BYTE)
113 /* ECMA-compliant for-in loop with argument or local variable loop control. */
114 OPDEF(JSOP_FORARG, 10, "forarg", NULL, 3, 0, 1, 19, JOF_QARG|JOF_NAME|JOF_FOR)
115 OPDEF(JSOP_FORVAR, 11, "forvar", NULL, 3, 0, 1, 19, JOF_QVAR|JOF_NAME|JOF_FOR)
117 /* More longstanding bytecodes. */
118 OPDEF(JSOP_DUP, 12, "dup", NULL, 1, 1, 2, 0, JOF_BYTE)
119 OPDEF(JSOP_DUP2, 13, "dup2", NULL, 1, 2, 4, 0, JOF_BYTE)
120 OPDEF(JSOP_SETCONST, 14, "setconst", NULL, 3, 1, 1, 3, JOF_ATOM|JOF_NAME|JOF_SET|JOF_ASSIGNING)
121 OPDEF(JSOP_BITOR, 15, "bitor", "|", 1, 2, 1, 7, JOF_BYTE|JOF_LEFTASSOC)
122 OPDEF(JSOP_BITXOR, 16, "bitxor", "^", 1, 2, 1, 8, JOF_BYTE|JOF_LEFTASSOC)
123 OPDEF(JSOP_BITAND, 17, "bitand", "&", 1, 2, 1, 9, JOF_BYTE|JOF_LEFTASSOC)
124 OPDEF(JSOP_EQ, 18, "eq", "==", 1, 2, 1, 10, JOF_BYTE|JOF_LEFTASSOC|JOF_DETECTING)
125 OPDEF(JSOP_NE, 19, "ne", "!=", 1, 2, 1, 10, JOF_BYTE|JOF_LEFTASSOC|JOF_DETECTING)
126 OPDEF(JSOP_LT, 20, "lt", "<", 1, 2, 1, 11, JOF_BYTE|JOF_LEFTASSOC)
127 OPDEF(JSOP_LE, 21, "le", "<=", 1, 2, 1, 11, JOF_BYTE|JOF_LEFTASSOC)
128 OPDEF(JSOP_GT, 22, "gt", ">", 1, 2, 1, 11, JOF_BYTE|JOF_LEFTASSOC)
129 OPDEF(JSOP_GE, 23, "ge", ">=", 1, 2, 1, 11, JOF_BYTE|JOF_LEFTASSOC)
130 OPDEF(JSOP_LSH, 24, "lsh", "<<", 1, 2, 1, 12, JOF_BYTE|JOF_LEFTASSOC)
131 OPDEF(JSOP_RSH, 25, "rsh", ">>", 1, 2, 1, 12, JOF_BYTE|JOF_LEFTASSOC)
132 OPDEF(JSOP_URSH, 26, "ursh", ">>>", 1, 2, 1, 12, JOF_BYTE|JOF_LEFTASSOC)
133 OPDEF(JSOP_ADD, 27, "add", "+", 1, 2, 1, 13, JOF_BYTE|JOF_LEFTASSOC)
134 OPDEF(JSOP_SUB, 28, "sub", "-", 1, 2, 1, 13, JOF_BYTE|JOF_LEFTASSOC)
135 OPDEF(JSOP_MUL, 29, "mul", "*", 1, 2, 1, 14, JOF_BYTE|JOF_LEFTASSOC)
136 OPDEF(JSOP_DIV, 30, "div", "/", 1, 2, 1, 14, JOF_BYTE|JOF_LEFTASSOC)
137 OPDEF(JSOP_MOD, 31, "mod", "%", 1, 2, 1, 14, JOF_BYTE|JOF_LEFTASSOC)
138 OPDEF(JSOP_NOT, 32, "not", "!", 1, 1, 1, 15, JOF_BYTE|JOF_DETECTING)
139 OPDEF(JSOP_BITNOT, 33, "bitnot", "~", 1, 1, 1, 15, JOF_BYTE)
140 OPDEF(JSOP_NEG, 34, "neg", "- ", 1, 1, 1, 15, JOF_BYTE)
141 OPDEF(JSOP_NEW, 35, js_new_str, NULL, 3, -1, 1, 17, JOF_UINT16|JOF_INVOKE)
142 OPDEF(JSOP_DELNAME, 36, "delname", NULL, 3, 0, 1, 17, JOF_ATOM|JOF_NAME|JOF_DEL)
143 OPDEF(JSOP_DELPROP, 37, "delprop", NULL, 3, 1, 1, 17, JOF_ATOM|JOF_PROP|JOF_DEL)
144 OPDEF(JSOP_DELELEM, 38, "delelem", NULL, 1, 2, 1, 17, JOF_BYTE |JOF_ELEM|JOF_DEL)
145 OPDEF(JSOP_TYPEOF, 39, js_typeof_str,NULL, 1, 1, 1, 15, JOF_BYTE|JOF_DETECTING)
146 OPDEF(JSOP_VOID, 40, js_void_str, NULL, 1, 1, 1, 15, JOF_BYTE)
147 OPDEF(JSOP_INCNAME, 41, "incname", NULL, 3, 0, 1, 15, JOF_ATOM|JOF_NAME|JOF_INC)
148 OPDEF(JSOP_INCPROP, 42, "incprop", NULL, 3, 1, 1, 15, JOF_ATOM|JOF_PROP|JOF_INC)
149 OPDEF(JSOP_INCELEM, 43, "incelem", NULL, 1, 2, 1, 15, JOF_BYTE |JOF_ELEM|JOF_INC)
150 OPDEF(JSOP_DECNAME, 44, "decname", NULL, 3, 0, 1, 15, JOF_ATOM|JOF_NAME|JOF_DEC)
151 OPDEF(JSOP_DECPROP, 45, "decprop", NULL, 3, 1, 1, 15, JOF_ATOM|JOF_PROP|JOF_DEC)
152 OPDEF(JSOP_DECELEM, 46, "decelem", NULL, 1, 2, 1, 15, JOF_BYTE |JOF_ELEM|JOF_DEC)
153 OPDEF(JSOP_NAMEINC, 47, "nameinc", NULL, 3, 0, 1, 15, JOF_ATOM|JOF_NAME|JOF_INC|JOF_POST)
154 OPDEF(JSOP_PROPINC, 48, "propinc", NULL, 3, 1, 1, 15, JOF_ATOM|JOF_PROP|JOF_INC|JOF_POST|JOF_TMPSLOT)
155 OPDEF(JSOP_ELEMINC, 49, "eleminc", NULL, 1, 2, 1, 15, JOF_BYTE |JOF_ELEM|JOF_INC|JOF_POST|JOF_TMPSLOT)
156 OPDEF(JSOP_NAMEDEC, 50, "namedec", NULL, 3, 0, 1, 15, JOF_ATOM|JOF_NAME|JOF_DEC|JOF_POST)
157 OPDEF(JSOP_PROPDEC, 51, "propdec", NULL, 3, 1, 1, 15, JOF_ATOM|JOF_PROP|JOF_DEC|JOF_POST|JOF_TMPSLOT)
158 OPDEF(JSOP_ELEMDEC, 52, "elemdec", NULL, 1, 2, 1, 15, JOF_BYTE |JOF_ELEM|JOF_DEC|JOF_POST|JOF_TMPSLOT)
159 OPDEF(JSOP_GETPROP, 53, "getprop", NULL, 3, 1, 1, 18, JOF_ATOM|JOF_PROP)
160 OPDEF(JSOP_SETPROP, 54, "setprop", NULL, 3, 2, 1, 3, JOF_ATOM|JOF_PROP|JOF_SET|JOF_ASSIGNING|JOF_DETECTING)
161 OPDEF(JSOP_GETELEM, 55, "getelem", NULL, 1, 2, 1, 18, JOF_BYTE |JOF_ELEM|JOF_LEFTASSOC)
162 OPDEF(JSOP_SETELEM, 56, "setelem", NULL, 1, 3, 1, 3, JOF_BYTE |JOF_ELEM|JOF_SET|JOF_ASSIGNING|JOF_DETECTING)
163 OPDEF(JSOP_CALLNAME, 57, "callname", NULL, 3, 0, 2, 19, JOF_ATOM|JOF_NAME|JOF_CALLOP)
164 OPDEF(JSOP_CALL, 58, "call", NULL, 3, -1, 1, 18, JOF_UINT16|JOF_INVOKE)
165 OPDEF(JSOP_NAME, 59, "name", NULL, 3, 0, 1, 19, JOF_ATOM|JOF_NAME)
166 OPDEF(JSOP_DOUBLE, 60, "double", NULL, 3, 0, 1, 16, JOF_ATOM)
167 OPDEF(JSOP_STRING, 61, "string", NULL, 3, 0, 1, 19, JOF_ATOM)
168 OPDEF(JSOP_ZERO, 62, "zero", "0", 1, 0, 1, 16, JOF_BYTE)
169 OPDEF(JSOP_ONE, 63, "one", "1", 1, 0, 1, 16, JOF_BYTE)
170 OPDEF(JSOP_NULL, 64, js_null_str, js_null_str, 1, 0, 1, 19, JOF_BYTE)
171 OPDEF(JSOP_THIS, 65, js_this_str, js_this_str, 1, 0, 1, 19, JOF_BYTE)
172 OPDEF(JSOP_FALSE, 66, js_false_str, js_false_str, 1, 0, 1, 19, JOF_BYTE)
173 OPDEF(JSOP_TRUE, 67, js_true_str, js_true_str, 1, 0, 1, 19, JOF_BYTE)
174 OPDEF(JSOP_OR, 68, "or", NULL, 3, 1, 0, 5, JOF_JUMP|JOF_DETECTING)
175 OPDEF(JSOP_AND, 69, "and", NULL, 3, 1, 0, 6, JOF_JUMP|JOF_DETECTING)
177 /* The switch bytecodes have variable length. */
178 OPDEF(JSOP_TABLESWITCH, 70, "tableswitch", NULL, -1, 1, 0, 0, JOF_TABLESWITCH|JOF_DETECTING|JOF_PARENHEAD)
179 OPDEF(JSOP_LOOKUPSWITCH, 71, "lookupswitch", NULL, -1, 1, 0, 0, JOF_LOOKUPSWITCH|JOF_DETECTING|JOF_PARENHEAD)
181 /* New, infallible/transitive identity ops. */
182 OPDEF(JSOP_STRICTEQ, 72, "stricteq", NULL, 1, 2, 1, 10, JOF_BYTE|JOF_DETECTING)
183 OPDEF(JSOP_STRICTNE, 73, "strictne", NULL, 1, 2, 1, 10, JOF_BYTE|JOF_DETECTING)
185 /* Lexical closure constructor. */
186 OPDEF(JSOP_CLOSURE, 74, "closure", NULL, 3, 0, 0, 0, JOF_OBJECT)
188 /* Export and import ops. */
189 OPDEF(JSOP_EXPORTALL, 75, "exportall", NULL, 1, 0, 0, 0, JOF_BYTE)
190 OPDEF(JSOP_EXPORTNAME,76, "exportname", NULL, 3, 0, 0, 0, JOF_ATOM|JOF_NAME)
191 OPDEF(JSOP_IMPORTALL, 77, "importall", NULL, 1, 1, 0, 0, JOF_BYTE)
192 OPDEF(JSOP_IMPORTPROP,78, "importprop", NULL, 3, 1, 0, 0, JOF_ATOM|JOF_PROP|JOF_IMPORT)
193 OPDEF(JSOP_IMPORTELEM,79, "importelem", NULL, 1, 2, 0, 0, JOF_BYTE |JOF_ELEM|JOF_IMPORT)
195 /* Push object literal. */
196 OPDEF(JSOP_OBJECT, 80, "object", NULL, 3, 0, 1, 19, JOF_OBJECT)
198 /* Pop value and discard it. */
199 OPDEF(JSOP_POP, 81, "pop", NULL, 1, 1, 0, 2, JOF_BYTE)
201 /* Convert value to number, for unary +. */
202 OPDEF(JSOP_POS, 82, "pos", "+ ", 1, 1, 1, 15, JOF_BYTE)
204 /* Trap into debugger for breakpoint, etc. */
205 OPDEF(JSOP_TRAP, 83, "trap", NULL, 1, 0, 0, 0, JOF_BYTE)
207 /* Fast get/set ops for function arguments and local variables. */
208 OPDEF(JSOP_GETARG, 84, "getarg", NULL, 3, 0, 1, 19, JOF_QARG |JOF_NAME)
209 OPDEF(JSOP_SETARG, 85, "setarg", NULL, 3, 1, 1, 3, JOF_QARG |JOF_NAME|JOF_SET|JOF_ASSIGNING)
210 OPDEF(JSOP_GETVAR, 86, "getvar", NULL, 3, 0, 1, 19, JOF_QVAR |JOF_NAME)
211 OPDEF(JSOP_SETVAR, 87, "setvar", NULL, 3, 1, 1, 3, JOF_QVAR |JOF_NAME|JOF_SET|JOF_ASSIGNING|JOF_DETECTING)
213 /* Push unsigned 16-bit int constant. */
214 OPDEF(JSOP_UINT16, 88, "uint16", NULL, 3, 0, 1, 16, JOF_UINT16)
216 /* Object and array literal support. */
217 OPDEF(JSOP_NEWINIT, 89, "newinit", NULL, 1, 2, 1, 0, JOF_BYTE)
218 OPDEF(JSOP_ENDINIT, 90, "endinit", NULL, 1, 0, 0, 19, JOF_BYTE)
219 OPDEF(JSOP_INITPROP, 91, "initprop", NULL, 3, 1, 0, 3, JOF_ATOM|JOF_PROP|JOF_DETECTING)
220 OPDEF(JSOP_INITELEM, 92, "initelem", NULL, 1, 2, 0, 3, JOF_BYTE |JOF_ELEM|JOF_DETECTING)
221 OPDEF(JSOP_DEFSHARP, 93, "defsharp", NULL, 3, 0, 0, 0, JOF_UINT16)
222 OPDEF(JSOP_USESHARP, 94, "usesharp", NULL, 3, 0, 1, 0, JOF_UINT16)
224 /* Fast inc/dec ops for args and local vars. */
225 OPDEF(JSOP_INCARG, 95, "incarg", NULL, 3, 0, 1, 15, JOF_QARG |JOF_NAME|JOF_INC)
226 OPDEF(JSOP_INCVAR, 96, "incvar", NULL, 3, 0, 1, 15, JOF_QVAR |JOF_NAME|JOF_INC)
227 OPDEF(JSOP_DECARG, 97, "decarg", NULL, 3, 0, 1, 15, JOF_QARG |JOF_NAME|JOF_DEC)
228 OPDEF(JSOP_DECVAR, 98, "decvar", NULL, 3, 0, 1, 15, JOF_QVAR |JOF_NAME|JOF_DEC)
229 OPDEF(JSOP_ARGINC, 99, "arginc", NULL, 3, 0, 1, 15, JOF_QARG |JOF_NAME|JOF_INC|JOF_POST)
230 OPDEF(JSOP_VARINC, 100,"varinc", NULL, 3, 0, 1, 15, JOF_QVAR |JOF_NAME|JOF_INC|JOF_POST)
231 OPDEF(JSOP_ARGDEC, 101,"argdec", NULL, 3, 0, 1, 15, JOF_QARG |JOF_NAME|JOF_DEC|JOF_POST)
232 OPDEF(JSOP_VARDEC, 102,"vardec", NULL, 3, 0, 1, 15, JOF_QVAR |JOF_NAME|JOF_DEC|JOF_POST)
234 /*
235 * Initialize for-in iterator. See also JSOP_FOREACH and JSOP_FOREACHKEYVAL.
236 */
237 OPDEF(JSOP_FORIN, 103,"forin", NULL, 1, 1, 1, 0, JOF_BYTE)
239 /* ECMA-compliant for/in ops. */
240 OPDEF(JSOP_FORNAME, 104,"forname", NULL, 3, 0, 1, 19, JOF_ATOM|JOF_NAME|JOF_FOR)
241 OPDEF(JSOP_FORPROP, 105,"forprop", NULL, 3, 1, 1, 18, JOF_ATOM|JOF_PROP|JOF_FOR)
242 OPDEF(JSOP_FORELEM, 106,"forelem", NULL, 1, 1, 3, 18, JOF_BYTE |JOF_ELEM|JOF_FOR)
243 OPDEF(JSOP_POPN, 107,"popn", NULL, 3, -1, 0, 0, JOF_UINT16)
245 /* ECMA-compliant assignment ops. */
246 OPDEF(JSOP_BINDNAME, 108,"bindname", NULL, 3, 0, 1, 0, JOF_ATOM|JOF_NAME|JOF_SET|JOF_ASSIGNING)
247 OPDEF(JSOP_SETNAME, 109,"setname", NULL, 3, 2, 1, 3, JOF_ATOM|JOF_NAME|JOF_SET|JOF_ASSIGNING|JOF_DETECTING)
249 /* Exception handling ops. */
250 OPDEF(JSOP_THROW, 110,js_throw_str, NULL, 1, 1, 0, 0, JOF_BYTE)
252 /* 'in' and 'instanceof' ops. */
253 OPDEF(JSOP_IN, 111,js_in_str, js_in_str, 1, 2, 1, 11, JOF_BYTE|JOF_LEFTASSOC)
254 OPDEF(JSOP_INSTANCEOF,112,js_instanceof_str,js_instanceof_str,1,2,1,11,JOF_BYTE|JOF_LEFTASSOC)
256 /* debugger op */
257 OPDEF(JSOP_DEBUGGER, 113,"debugger", NULL, 1, 0, 0, 0, JOF_BYTE)
259 /* gosub/retsub for finally handling */
260 OPDEF(JSOP_GOSUB, 114,"gosub", NULL, 3, 0, 0, 0, JOF_JUMP)
261 OPDEF(JSOP_RETSUB, 115,"retsub", NULL, 1, 0, 0, 0, JOF_BYTE)
263 /* More exception handling ops. */
264 OPDEF(JSOP_EXCEPTION, 116,"exception", NULL, 1, 0, 1, 0, JOF_BYTE)
266 /* Push the global object as |this| for a non-reference-type callable. */
267 OPDEF(JSOP_GLOBALTHIS,117,"globalthis", js_null_str, 1, 0, 1, 0, JOF_BYTE)
269 /*
270 * ECMA-compliant switch statement ops.
271 * CONDSWITCH is a decompilable NOP; CASE is ===, POP, jump if true, re-push
272 * lval if false; and DEFAULT is POP lval and GOTO.
273 */
274 OPDEF(JSOP_CONDSWITCH,118,"condswitch", NULL, 1, 0, 0, 0, JOF_BYTE|JOF_PARENHEAD)
275 OPDEF(JSOP_CASE, 119,"case", NULL, 3, 1, 0, 0, JOF_JUMP)
276 OPDEF(JSOP_DEFAULT, 120,"default", NULL, 3, 1, 0, 0, JOF_JUMP)
278 /*
279 * ECMA-compliant call to eval op
280 */
281 OPDEF(JSOP_EVAL, 121,"eval", NULL, 3, -1, 1, 18, JOF_UINT16|JOF_INVOKE)
283 /*
284 * ECMA-compliant helper for 'for (x[i] in o)' loops.
285 */
286 OPDEF(JSOP_ENUMELEM, 122,"enumelem", NULL, 1, 3, 0, 3, JOF_BYTE |JOF_SET|JOF_ASSIGNING)
288 /*
289 * Getter and setter prefix bytecodes. These modify the next bytecode, either
290 * an assignment or a property initializer code, which then defines a property
291 * getter or setter.
292 */
293 OPDEF(JSOP_GETTER, 123,js_getter_str,NULL, 1, 0, 0, 0, JOF_BYTE)
294 OPDEF(JSOP_SETTER, 124,js_setter_str,NULL, 1, 0, 0, 0, JOF_BYTE)
296 /*
297 * Prolog bytecodes for defining function, var, and const names.
298 */
299 OPDEF(JSOP_DEFFUN, 125,"deffun", NULL, 3, 0, 0, 0, JOF_OBJECT|JOF_DECLARING)
300 OPDEF(JSOP_DEFCONST, 126,"defconst", NULL, 3, 0, 0, 0, JOF_ATOM|JOF_DECLARING)
301 OPDEF(JSOP_DEFVAR, 127,"defvar", NULL, 3, 0, 0, 0, JOF_ATOM|JOF_DECLARING)
303 /* Auto-clone (if needed due to re-parenting) and push an anonymous function. */
304 OPDEF(JSOP_ANONFUNOBJ, 128, "anonfunobj", NULL, 3, 0, 1, 19, JOF_OBJECT)
306 /* ECMA ed. 3 named function expression. */
307 OPDEF(JSOP_NAMEDFUNOBJ, 129, "namedfunobj", NULL, 3, 0, 1, 19, JOF_OBJECT)
309 /*
310 * Like JSOP_SETLOCAL, but specialized to avoid requiring JSOP_POP immediately
311 * after to throw away the exception value.
312 */
313 OPDEF(JSOP_SETLOCALPOP, 130, "setlocalpop", NULL, 3, 1, 0, 3, JOF_LOCAL|JOF_NAME|JOF_SET)
315 /* Parenthesization opcode to help the decompiler. */
316 OPDEF(JSOP_GROUP, 131, "group", NULL, 1, 0, 0, 19, JOF_BYTE)
318 /*
319 * Host object extension: given 'o.item(i) = j', the left-hand side compiles
320 * JSOP_SETCALL, rather than JSOP_CALL.
321 */
322 OPDEF(JSOP_SETCALL, 132, "setcall", NULL, 3, -1, 2, 18, JOF_UINT16|JOF_SET|JOF_ASSIGNING)
324 /*
325 * Exception handling no-ops, for more economical byte-coding than SRC_TRYFIN
326 * srcnote-annotated JSOP_NOPs.
327 */
328 OPDEF(JSOP_TRY, 133,"try", NULL, 1, 0, 0, 0, JOF_BYTE)
329 OPDEF(JSOP_FINALLY, 134,"finally", NULL, 1, 0, 0, 0, JOF_BYTE)
331 /*
332 * Swap the top two stack elements.
333 */
334 OPDEF(JSOP_SWAP, 135,"swap", NULL, 1, 2, 2, 0, JOF_BYTE)
336 /*
337 * Bytecodes that avoid making an arguments object in most cases:
338 * JSOP_ARGSUB gets arguments[i] from fp->argv, iff i is in [0, fp->argc-1].
339 * JSOP_ARGCNT returns fp->argc.
340 */
341 OPDEF(JSOP_ARGSUB, 136,"argsub", NULL, 3, 0, 1, 18, JOF_QARG |JOF_NAME)
342 OPDEF(JSOP_ARGCNT, 137,"argcnt", NULL, 1, 0, 1, 18, JOF_BYTE)
344 /*
345 * Define a local function object as a local variable.
346 * The local variable's slot number is the first immediate two-byte operand.
347 * The function object's atom index is the second immediate operand.
348 */
349 OPDEF(JSOP_DEFLOCALFUN, 138,"deflocalfun",NULL, 5, 0, 0, 0, JOF_SLOTOBJECT|JOF_DECLARING)
351 /* Extended jumps. */
352 OPDEF(JSOP_GOTOX, 139,"gotox", NULL, 5, 0, 0, 0, JOF_JUMPX)
353 OPDEF(JSOP_IFEQX, 140,"ifeqx", NULL, 5, 1, 0, 4, JOF_JUMPX|JOF_DETECTING)
354 OPDEF(JSOP_IFNEX, 141,"ifnex", NULL, 5, 1, 0, 0, JOF_JUMPX|JOF_PARENHEAD)
355 OPDEF(JSOP_ORX, 142,"orx", NULL, 5, 1, 0, 5, JOF_JUMPX|JOF_DETECTING)
356 OPDEF(JSOP_ANDX, 143,"andx", NULL, 5, 1, 0, 6, JOF_JUMPX|JOF_DETECTING)
357 OPDEF(JSOP_GOSUBX, 144,"gosubx", NULL, 5, 0, 0, 0, JOF_JUMPX)
358 OPDEF(JSOP_CASEX, 145,"casex", NULL, 5, 1, 0, 0, JOF_JUMPX)
359 OPDEF(JSOP_DEFAULTX, 146,"defaultx", NULL, 5, 1, 0, 0, JOF_JUMPX)
360 OPDEF(JSOP_TABLESWITCHX, 147,"tableswitchx",NULL, -1, 1, 0, 0, JOF_TABLESWITCHX|JOF_DETECTING|JOF_PARENHEAD)
361 OPDEF(JSOP_LOOKUPSWITCHX, 148,"lookupswitchx",NULL, -1, 1, 0, 0, JOF_LOOKUPSWITCHX|JOF_DETECTING|JOF_PARENHEAD)
363 /* Placeholders for a real jump opcode set during backpatch chain fixup. */
364 OPDEF(JSOP_BACKPATCH, 149,"backpatch",NULL, 3, 0, 0, 0, JOF_JUMP|JOF_BACKPATCH)
365 OPDEF(JSOP_BACKPATCH_POP, 150,"backpatch_pop",NULL, 3, 1, 0, 0, JOF_JUMP|JOF_BACKPATCH)
367 /* Set pending exception from the stack, to trigger rethrow. */
368 OPDEF(JSOP_THROWING, 151,"throwing", NULL, 1, 1, 0, 0, JOF_BYTE)
370 /* Set and get return value pseudo-register in stack frame. */
371 OPDEF(JSOP_SETRVAL, 152,"setrval", NULL, 1, 1, 0, 2, JOF_BYTE)
372 OPDEF(JSOP_RETRVAL, 153,"retrval", NULL, 1, 0, 0, 0, JOF_BYTE)
374 /* Optimized global variable ops (we don't bother doing a JSOP_FORGVAR op). */
375 OPDEF(JSOP_GETGVAR, 154,"getgvar", NULL, 3, 0, 1, 19, JOF_ATOM|JOF_NAME)
376 OPDEF(JSOP_SETGVAR, 155,"setgvar", NULL, 3, 1, 1, 3, JOF_ATOM|JOF_NAME|JOF_SET|JOF_ASSIGNING|JOF_DETECTING)
377 OPDEF(JSOP_INCGVAR, 156,"incgvar", NULL, 3, 0, 1, 15, JOF_ATOM|JOF_NAME|JOF_INC)
378 OPDEF(JSOP_DECGVAR, 157,"decgvar", NULL, 3, 0, 1, 15, JOF_ATOM|JOF_NAME|JOF_DEC)
379 OPDEF(JSOP_GVARINC, 158,"gvarinc", NULL, 3, 0, 1, 15, JOF_ATOM|JOF_NAME|JOF_INC|JOF_POST)
380 OPDEF(JSOP_GVARDEC, 159,"gvardec", NULL, 3, 0, 1, 15, JOF_ATOM|JOF_NAME|JOF_DEC|JOF_POST)
382 /* Regular expression literal requiring special "fork on exec" handling. */
383 OPDEF(JSOP_REGEXP, 160,"regexp", NULL, 3, 0, 1, 19, JOF_REGEXP)
385 /* XML (ECMA-357, a.k.a. "E4X") support. */
386 OPDEF(JSOP_DEFXMLNS, 161,"defxmlns", NULL, 1, 1, 0, 0, JOF_BYTE)
387 OPDEF(JSOP_ANYNAME, 162,"anyname", NULL, 1, 0, 1, 19, JOF_BYTE|JOF_XMLNAME)
388 OPDEF(JSOP_QNAMEPART, 163,"qnamepart", NULL, 3, 0, 1, 19, JOF_ATOM|JOF_XMLNAME)
389 OPDEF(JSOP_QNAMECONST, 164,"qnameconst", NULL, 3, 1, 1, 19, JOF_ATOM|JOF_XMLNAME)
390 OPDEF(JSOP_QNAME, 165,"qname", NULL, 1, 2, 1, 0, JOF_BYTE|JOF_XMLNAME)
391 OPDEF(JSOP_TOATTRNAME, 166,"toattrname", NULL, 1, 1, 1, 19, JOF_BYTE|JOF_XMLNAME)
392 OPDEF(JSOP_TOATTRVAL, 167,"toattrval", NULL, 1, 1, 1, 19, JOF_BYTE)
393 OPDEF(JSOP_ADDATTRNAME, 168,"addattrname",NULL, 1, 2, 1, 13, JOF_BYTE)
394 OPDEF(JSOP_ADDATTRVAL, 169,"addattrval", NULL, 1, 2, 1, 13, JOF_BYTE)
395 OPDEF(JSOP_BINDXMLNAME, 170,"bindxmlname",NULL, 1, 1, 2, 3, JOF_BYTE|JOF_SET|JOF_ASSIGNING)
396 OPDEF(JSOP_SETXMLNAME, 171,"setxmlname", NULL, 1, 3, 1, 3, JOF_BYTE|JOF_SET|JOF_ASSIGNING|JOF_DETECTING)
397 OPDEF(JSOP_XMLNAME, 172,"xmlname", NULL, 1, 1, 1, 19, JOF_BYTE)
398 OPDEF(JSOP_DESCENDANTS, 173,"descendants",NULL, 1, 2, 1, 18, JOF_BYTE)
399 OPDEF(JSOP_FILTER, 174,"filter", NULL, 3, 1, 1, 0, JOF_JUMP)
400 OPDEF(JSOP_ENDFILTER, 175,"endfilter", NULL, 1, 1, 0, 18, JOF_BYTE)
401 OPDEF(JSOP_TOXML, 176,"toxml", NULL, 1, 1, 1, 19, JOF_BYTE)
402 OPDEF(JSOP_TOXMLLIST, 177,"toxmllist", NULL, 1, 1, 1, 19, JOF_BYTE)
403 OPDEF(JSOP_XMLTAGEXPR, 178,"xmltagexpr", NULL, 1, 1, 1, 0, JOF_BYTE)
404 OPDEF(JSOP_XMLELTEXPR, 179,"xmleltexpr", NULL, 1, 1, 1, 0, JOF_BYTE)
405 OPDEF(JSOP_XMLOBJECT, 180,"xmlobject", NULL, 3, 0, 1, 19, JOF_OBJECT)
406 OPDEF(JSOP_XMLCDATA, 181,"xmlcdata", NULL, 3, 0, 1, 19, JOF_ATOM)
407 OPDEF(JSOP_XMLCOMMENT, 182,"xmlcomment", NULL, 3, 0, 1, 19, JOF_ATOM)
408 OPDEF(JSOP_XMLPI, 183,"xmlpi", NULL, 3, 1, 1, 19, JOF_ATOM)
409 OPDEF(JSOP_CALLPROP, 184,"callprop", NULL, 3, 1, 2, 18, JOF_ATOM|JOF_PROP|JOF_CALLOP)
410 OPDEF(JSOP_GETFUNNS, 185,"getfunns", NULL, 1, 0, 1, 19, JOF_BYTE)
411 OPDEF(JSOP_FOREACH, 186,"foreach", NULL, 1, 1, 1, 0, JOF_BYTE)
412 OPDEF(JSOP_DELDESC, 187,"deldesc", NULL, 1, 2, 1, 17, JOF_BYTE |JOF_ELEM|JOF_DEL)
414 /*
415 * Opcode to hold 24-bit immediate integer operands.
416 */
417 OPDEF(JSOP_UINT24, 188,"uint24", NULL, 4, 0, 1, 16, JOF_UINT24)
419 /*
420 * Opcodes to allow 24-bit atom or object indexes. Whenever an index exceeds
421 * the 16-bit limit, the index-accessing bytecode must be bracketed by
422 * JSOP_INDEXBASE and JSOP_RESETBASE to provide the upper bits of the index.
423 * See jsemit.c, EmitIndexOp.
424 */
425 OPDEF(JSOP_INDEXBASE, 189,"atombase", NULL, 2, 0, 0, 0, JOF_2BYTE|JOF_INDEXBASE)
426 OPDEF(JSOP_RESETBASE, 190,"resetbase", NULL, 1, 0, 0, 0, JOF_BYTE)
427 OPDEF(JSOP_RESETBASE0, 191,"resetbase0", NULL, 1, 0, 0, 0, JOF_BYTE)
429 /*
430 * Opcodes to help the decompiler deal with XML.
431 */
432 OPDEF(JSOP_STARTXML, 192,"startxml", NULL, 1, 0, 0, 0, JOF_BYTE)
433 OPDEF(JSOP_STARTXMLEXPR, 193,"startxmlexpr",NULL, 1, 0, 0, 0, JOF_BYTE)
435 OPDEF(JSOP_CALLELEM, 194, "callelem", NULL, 1, 2, 2, 18, JOF_BYTE |JOF_ELEM|JOF_LEFTASSOC|JOF_CALLOP)
437 /*
438 * Stop interpretation, emitted at end of script to save the threaded bytecode
439 * interpreter an extra branch test on every DO_NEXT_OP (see jsinterp.c).
440 */
441 OPDEF(JSOP_STOP, 195,"stop", NULL, 1, 0, 0, 0, JOF_BYTE)
443 /*
444 * Get an extant property value, throwing ReferenceError if the identified
445 * property does not exist.
446 */
447 OPDEF(JSOP_GETXPROP, 196,"getxprop", NULL, 3, 1, 1, 18, JOF_ATOM|JOF_PROP)
449 OPDEF(JSOP_CALLXMLNAME, 197, "callxmlname", NULL, 1, 1, 2, 19, JOF_BYTE|JOF_CALLOP)
451 /*
452 * Specialized JSOP_TYPEOF to avoid reporting undefined for typeof(0, undef).
453 */
454 OPDEF(JSOP_TYPEOFEXPR, 198,"typeofexpr", NULL, 1, 1, 1, 15, JOF_BYTE|JOF_DETECTING)
456 /*
457 * Block-local scope support.
458 */
459 OPDEF(JSOP_ENTERBLOCK, 199,"enterblock", NULL, 3, 0, 0, 0, JOF_OBJECT)
460 OPDEF(JSOP_LEAVEBLOCK, 200,"leaveblock", NULL, 3, 0, 0, 0, JOF_UINT16)
461 OPDEF(JSOP_GETLOCAL, 201,"getlocal", NULL, 3, 0, 1, 19, JOF_LOCAL|JOF_NAME)
462 OPDEF(JSOP_SETLOCAL, 202,"setlocal", NULL, 3, 1, 1, 3, JOF_LOCAL|JOF_NAME|JOF_SET)
463 OPDEF(JSOP_INCLOCAL, 203,"inclocal", NULL, 3, 0, 1, 15, JOF_LOCAL|JOF_NAME|JOF_INC)
464 OPDEF(JSOP_DECLOCAL, 204,"declocal", NULL, 3, 0, 1, 15, JOF_LOCAL|JOF_NAME|JOF_DEC)
465 OPDEF(JSOP_LOCALINC, 205,"localinc", NULL, 3, 0, 1, 15, JOF_LOCAL|JOF_NAME|JOF_INC|JOF_POST)
466 OPDEF(JSOP_LOCALDEC, 206,"localdec", NULL, 3, 0, 1, 15, JOF_LOCAL|JOF_NAME|JOF_DEC|JOF_POST)
467 OPDEF(JSOP_FORLOCAL, 207,"forlocal", NULL, 3, 0, 1, 19, JOF_LOCAL|JOF_NAME|JOF_FOR)
469 /*
470 * Iterator, generator, and array comprehension support.
471 */
472 OPDEF(JSOP_FORCONST, 208,"forconst", NULL, 3, 0, 1, 19, JOF_QVAR|JOF_NAME|JOF_FOR)
473 OPDEF(JSOP_ENDITER, 209,"enditer", NULL, 1, 1, 0, 0, JOF_BYTE|JOF_TMPSLOT)
474 OPDEF(JSOP_GENERATOR, 210,"generator", NULL, 1, 0, 0, 0, JOF_BYTE)
475 OPDEF(JSOP_YIELD, 211,"yield", NULL, 1, 1, 1, 1, JOF_BYTE)
476 OPDEF(JSOP_ARRAYPUSH, 212,"arraypush", NULL, 3, 1, 0, 3, JOF_LOCAL)
478 OPDEF(JSOP_FOREACHKEYVAL, 213,"foreachkeyval",NULL, 1, 1, 1, 0, JOF_BYTE)
480 /*
481 * Variant of JSOP_ENUMELEM for destructuring const (const [a, b] = ...).
482 */
483 OPDEF(JSOP_ENUMCONSTELEM, 214,"enumconstelem",NULL, 1, 3, 0, 3, JOF_BYTE|JOF_SET|JOF_ASSIGNING)
485 /*
486 * Variant of JSOP_LEAVEBLOCK has a result on the stack above the locals,
487 * which must be moved down when the block pops.
488 */
489 OPDEF(JSOP_LEAVEBLOCKEXPR,215,"leaveblockexpr",NULL, 3, 0, 0, 1, JOF_UINT16)
491 /*
492 * Optimize common JSOP_{THIS,GET{ARG,VAR,LOCAL}} -> JSOP_GETPROP cliches.
493 */
494 OPDEF(JSOP_GETTHISPROP, 216,"getthisprop", NULL, 3, 0, 1, 18, JOF_ATOM)
495 OPDEF(JSOP_GETARGPROP, 217,"getargprop", NULL, 5, 0, 1, 18, JOF_SLOTATOM|JOF_VARPROP)
496 OPDEF(JSOP_GETVARPROP, 218,"getvarprop", NULL, 5, 0, 1, 18, JOF_SLOTATOM|JOF_VARPROP)
497 OPDEF(JSOP_GETLOCALPROP, 219,"getlocalprop", NULL, 5, 0, 1, 18, JOF_SLOTATOM|JOF_VARPROP)
499 /*
500 * Optimize atom segments 1-3. These must be followed by JSOP_RESETBASE0 after
501 * the opcode that they prefix.
502 */
503 OPDEF(JSOP_INDEXBASE1, 220,"atombase1", NULL, 1, 0, 0, 0, JOF_BYTE |JOF_INDEXBASE)
504 OPDEF(JSOP_INDEXBASE2, 221,"atombase2", NULL, 1, 0, 0, 0, JOF_BYTE |JOF_INDEXBASE)
505 OPDEF(JSOP_INDEXBASE3, 222,"atombase3", NULL, 1, 0, 0, 0, JOF_BYTE |JOF_INDEXBASE)
507 OPDEF(JSOP_CALLGVAR, 223, "callgvar", NULL, 3, 0, 2, 19, JOF_ATOM|JOF_NAME|JOF_CALLOP)
508 OPDEF(JSOP_CALLVAR, 224, "callvar", NULL, 3, 0, 2, 19, JOF_QVAR |JOF_NAME|JOF_CALLOP)
509 OPDEF(JSOP_CALLARG, 225, "callarg", NULL, 3, 0, 2, 19, JOF_QARG |JOF_NAME|JOF_CALLOP)
510 OPDEF(JSOP_CALLLOCAL, 226, "calllocal", NULL, 3, 0, 2, 19, JOF_LOCAL|JOF_NAME|JOF_CALLOP)
512 /*
513 * Opcodes to hold 8-bit and 32-bit immediate integer operands.
514 */
515 OPDEF(JSOP_INT8, 227, "int8", NULL, 2, 0, 1, 16, JOF_INT8)
516 OPDEF(JSOP_INT32, 228, "int32", NULL, 5, 0, 1, 16, JOF_INT32)