/[jscoverage]/trunk/js/jsopcode.tbl
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Revision 332 - (hide annotations)
Thu Oct 23 19:03:33 2008 UTC (11 years, 1 month ago) by siliconforks
File size: 31135 byte(s)
Add SpiderMonkey from Firefox 3.1b1.

The following directories and files were removed:
correct/, correct.js
liveconnect/
nanojit/
t/
v8/
vprof/
xpconnect/
all JavaScript files (Y.js, call.js, if.js, math-partial-sums.js, md5.js, perfect.js, trace-test.js, trace.js)


1 siliconforks 332 /* -*- 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     *
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8     * 1.1 (the "License"); you may not use this file except in compliance with
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16     *
17     * The Original Code is Mozilla Communicator client code, released
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19     *
20     * The Initial Developer of the Original Code is
21     * Netscape Communications Corporation.
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37     * the terms of any one of the MPL, the GPL or the LGPL.
38     *
39     * ***** END LICENSE BLOCK ***** */
40    
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, -1 if variadic
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     */
96    
97     /* legend: op val name image len use def prec format */
98    
99     /* Longstanding JavaScript bytecodes. */
100     OPDEF(JSOP_INTERRUPT, 0, "interrupt", 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)
109    
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)
112    
113     /* ECMA-compliant for-in loop with argument or local loop control. */
114     OPDEF(JSOP_FORARG, 10, "forarg", NULL, 3, 0, 1, 19, JOF_QARG|JOF_NAME|JOF_FOR)
115     OPDEF(JSOP_FORLOCAL, 11, "forlocal", NULL, 3, 0, 1, 19, JOF_LOCAL|JOF_NAME|JOF_FOR)
116    
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)
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    
148     OPDEF(JSOP_INCNAME, 41, "incname", NULL, 3, 0, 1, 15, JOF_ATOM|JOF_NAME|JOF_INC|JOF_TMPSLOT2)
149     OPDEF(JSOP_INCPROP, 42, "incprop", NULL, 3, 1, 1, 15, JOF_ATOM|JOF_PROP|JOF_INC|JOF_TMPSLOT2)
150     OPDEF(JSOP_INCELEM, 43, "incelem", NULL, 1, 2, 1, 15, JOF_BYTE |JOF_ELEM|JOF_INC|JOF_TMPSLOT2)
151     OPDEF(JSOP_DECNAME, 44, "decname", NULL, 3, 0, 1, 15, JOF_ATOM|JOF_NAME|JOF_DEC|JOF_TMPSLOT2)
152     OPDEF(JSOP_DECPROP, 45, "decprop", NULL, 3, 1, 1, 15, JOF_ATOM|JOF_PROP|JOF_DEC|JOF_TMPSLOT2)
153     OPDEF(JSOP_DECELEM, 46, "decelem", NULL, 1, 2, 1, 15, JOF_BYTE |JOF_ELEM|JOF_DEC|JOF_TMPSLOT2)
154     OPDEF(JSOP_NAMEINC, 47, "nameinc", NULL, 3, 0, 1, 15, JOF_ATOM|JOF_NAME|JOF_INC|JOF_POST|JOF_TMPSLOT2)
155     OPDEF(JSOP_PROPINC, 48, "propinc", NULL, 3, 1, 1, 15, JOF_ATOM|JOF_PROP|JOF_INC|JOF_POST|JOF_TMPSLOT2)
156     OPDEF(JSOP_ELEMINC, 49, "eleminc", NULL, 1, 2, 1, 15, JOF_BYTE |JOF_ELEM|JOF_INC|JOF_POST|JOF_TMPSLOT2)
157     OPDEF(JSOP_NAMEDEC, 50, "namedec", NULL, 3, 0, 1, 15, JOF_ATOM|JOF_NAME|JOF_DEC|JOF_POST|JOF_TMPSLOT2)
158     OPDEF(JSOP_PROPDEC, 51, "propdec", NULL, 3, 1, 1, 15, JOF_ATOM|JOF_PROP|JOF_DEC|JOF_POST|JOF_TMPSLOT2)
159     OPDEF(JSOP_ELEMDEC, 52, "elemdec", NULL, 1, 2, 1, 15, JOF_BYTE |JOF_ELEM|JOF_DEC|JOF_POST|JOF_TMPSLOT2)
160    
161     OPDEF(JSOP_GETPROP, 53, "getprop", NULL, 3, 1, 1, 18, JOF_ATOM|JOF_PROP)
162     OPDEF(JSOP_SETPROP, 54, "setprop", NULL, 3, 2, 1, 3, JOF_ATOM|JOF_PROP|JOF_SET|JOF_DETECTING)
163     OPDEF(JSOP_GETELEM, 55, "getelem", NULL, 1, 2, 1, 18, JOF_BYTE |JOF_ELEM|JOF_LEFTASSOC)
164     OPDEF(JSOP_SETELEM, 56, "setelem", NULL, 1, 3, 1, 3, JOF_BYTE |JOF_ELEM|JOF_SET|JOF_DETECTING)
165     OPDEF(JSOP_CALLNAME, 57, "callname", NULL, 3, 0, 2, 19, JOF_ATOM|JOF_NAME|JOF_CALLOP)
166     OPDEF(JSOP_CALL, 58, "call", NULL, 3, -1, 1, 18, JOF_UINT16|JOF_INVOKE)
167     OPDEF(JSOP_NAME, 59, "name", NULL, 3, 0, 1, 19, JOF_ATOM|JOF_NAME)
168     OPDEF(JSOP_DOUBLE, 60, "double", NULL, 3, 0, 1, 16, JOF_ATOM)
169     OPDEF(JSOP_STRING, 61, "string", NULL, 3, 0, 1, 19, JOF_ATOM)
170     OPDEF(JSOP_ZERO, 62, "zero", "0", 1, 0, 1, 16, JOF_BYTE)
171     OPDEF(JSOP_ONE, 63, "one", "1", 1, 0, 1, 16, JOF_BYTE)
172     OPDEF(JSOP_NULL, 64, js_null_str, js_null_str, 1, 0, 1, 19, JOF_BYTE)
173     OPDEF(JSOP_THIS, 65, js_this_str, js_this_str, 1, 0, 1, 19, JOF_BYTE)
174     OPDEF(JSOP_FALSE, 66, js_false_str, js_false_str, 1, 0, 1, 19, JOF_BYTE)
175     OPDEF(JSOP_TRUE, 67, js_true_str, js_true_str, 1, 0, 1, 19, JOF_BYTE)
176     OPDEF(JSOP_OR, 68, "or", NULL, 3, 1, 0, 5, JOF_JUMP|JOF_DETECTING|JOF_LEFTASSOC)
177     OPDEF(JSOP_AND, 69, "and", NULL, 3, 1, 0, 6, JOF_JUMP|JOF_DETECTING|JOF_LEFTASSOC)
178    
179     /* The switch bytecodes have variable length. */
180     OPDEF(JSOP_TABLESWITCH, 70, "tableswitch", NULL, -1, 1, 0, 0, JOF_TABLESWITCH|JOF_DETECTING|JOF_PARENHEAD)
181     OPDEF(JSOP_LOOKUPSWITCH, 71, "lookupswitch", NULL, -1, 1, 0, 0, JOF_LOOKUPSWITCH|JOF_DETECTING|JOF_PARENHEAD)
182    
183     /* New, infallible/transitive identity ops. */
184     OPDEF(JSOP_STRICTEQ, 72, "stricteq", NULL, 1, 2, 1, 10, JOF_BYTE|JOF_DETECTING)
185     OPDEF(JSOP_STRICTNE, 73, "strictne", NULL, 1, 2, 1, 10, JOF_BYTE|JOF_DETECTING)
186    
187     /* Resume instruction (emitted for the JIT for instructions that can't be restarted). */
188     OPDEF(JSOP_RESUME, 74, "resume", NULL, 1, 0, 0, 0, JOF_BYTE)
189    
190     /* Variant of JSOP_NULL for default (global) |this| parameter pushing. */
191     OPDEF(JSOP_NULLTHIS, 75, js_null_str, js_null_str, 1, 0, 1, 19, JOF_BYTE)
192    
193     OPDEF(JSOP_UNUSED76, 76, "unused76", NULL, 1, 0, 0, 0, JOF_BYTE)
194     OPDEF(JSOP_UNUSED77, 77, "unused77", NULL, 1, 0, 0, 0, JOF_BYTE)
195     OPDEF(JSOP_UNUSED78, 78, "unused78", NULL, 1, 0, 0, 0, JOF_BYTE)
196     OPDEF(JSOP_UNUSED79, 79, "unused79", NULL, 1, 0, 0, 0, JOF_BYTE)
197    
198     /* Push object literal. */
199     OPDEF(JSOP_OBJECT, 80, "object", NULL, 3, 0, 1, 19, JOF_OBJECT)
200    
201     /* Pop value and discard it. */
202     OPDEF(JSOP_POP, 81, "pop", NULL, 1, 1, 0, 2, JOF_BYTE)
203    
204     /* Convert value to number, for unary +. */
205     OPDEF(JSOP_POS, 82, "pos", "+ ", 1, 1, 1, 15, JOF_BYTE)
206    
207     /* Trap into debugger for breakpoint, etc. */
208     OPDEF(JSOP_TRAP, 83, "trap", NULL, 1, 0, 0, 0, JOF_BYTE)
209    
210     /* Fast get/set ops for function arguments and local variables. */
211     OPDEF(JSOP_GETARG, 84, "getarg", NULL, 3, 0, 1, 19, JOF_QARG |JOF_NAME)
212     OPDEF(JSOP_SETARG, 85, "setarg", NULL, 3, 1, 1, 3, JOF_QARG |JOF_NAME|JOF_SET)
213     OPDEF(JSOP_GETLOCAL, 86,"getlocal", NULL, 3, 0, 1, 19, JOF_LOCAL|JOF_NAME)
214     OPDEF(JSOP_SETLOCAL, 87,"setlocal", NULL, 3, 1, 1, 3, JOF_LOCAL|JOF_NAME|JOF_SET|JOF_DETECTING)
215    
216     /* Push unsigned 16-bit int constant. */
217     OPDEF(JSOP_UINT16, 88, "uint16", NULL, 3, 0, 1, 16, JOF_UINT16)
218    
219     /* Object and array literal support. */
220     OPDEF(JSOP_NEWINIT, 89, "newinit", NULL, 2, 0, 1, 19, JOF_INT8)
221     OPDEF(JSOP_ENDINIT, 90, "endinit", NULL, 1, 0, 0, 19, JOF_BYTE)
222     OPDEF(JSOP_INITPROP, 91, "initprop", NULL, 3, 1, 0, 3, JOF_ATOM|JOF_PROP|JOF_SET|JOF_DETECTING)
223     OPDEF(JSOP_INITELEM, 92, "initelem", NULL, 1, 2, 0, 3, JOF_BYTE |JOF_ELEM|JOF_SET|JOF_DETECTING)
224     OPDEF(JSOP_DEFSHARP, 93, "defsharp", NULL, 3, 0, 0, 0, JOF_UINT16)
225     OPDEF(JSOP_USESHARP, 94, "usesharp", NULL, 3, 0, 1, 0, JOF_UINT16)
226    
227     /* Fast inc/dec ops for args and locals. */
228     OPDEF(JSOP_INCARG, 95, "incarg", NULL, 3, 0, 1, 15, JOF_QARG |JOF_NAME|JOF_INC)
229     OPDEF(JSOP_DECARG, 96, "decarg", NULL, 3, 0, 1, 15, JOF_QARG |JOF_NAME|JOF_DEC)
230     OPDEF(JSOP_ARGINC, 97, "arginc", NULL, 3, 0, 1, 15, JOF_QARG |JOF_NAME|JOF_INC|JOF_POST)
231     OPDEF(JSOP_ARGDEC, 98, "argdec", NULL, 3, 0, 1, 15, JOF_QARG |JOF_NAME|JOF_DEC|JOF_POST)
232    
233     OPDEF(JSOP_INCLOCAL, 99, "inclocal", NULL, 3, 0, 1, 15, JOF_LOCAL|JOF_NAME|JOF_INC)
234     OPDEF(JSOP_DECLOCAL, 100,"declocal", NULL, 3, 0, 1, 15, JOF_LOCAL|JOF_NAME|JOF_DEC)
235     OPDEF(JSOP_LOCALINC, 101,"localinc", NULL, 3, 0, 1, 15, JOF_LOCAL|JOF_NAME|JOF_INC|JOF_POST)
236     OPDEF(JSOP_LOCALDEC, 102,"localdec", NULL, 3, 0, 1, 15, JOF_LOCAL|JOF_NAME|JOF_DEC|JOF_POST)
237    
238     /*
239     * Initialize for-in iterator using the JSITER_* flag bits in this op's uint8
240     * immediate operand. See also JSOP_ENDITER.
241     */
242     OPDEF(JSOP_ITER, 103,"iter", NULL, 2, 1, 1, 0, JOF_UINT8)
243    
244     /* ECMA-compliant for/in ops. */
245     OPDEF(JSOP_FORNAME, 104,"forname", NULL, 3, 0, 1, 19, JOF_ATOM|JOF_NAME|JOF_FOR)
246     OPDEF(JSOP_FORPROP, 105,"forprop", NULL, 3, 1, 1, 18, JOF_ATOM|JOF_PROP|JOF_FOR)
247     OPDEF(JSOP_FORELEM, 106,"forelem", NULL, 1, 1, 3, 18, JOF_BYTE |JOF_ELEM|JOF_FOR)
248     OPDEF(JSOP_POPN, 107,"popn", NULL, 3, -1, 0, 0, JOF_UINT16)
249    
250     /* ECMA-compliant assignment ops. */
251     OPDEF(JSOP_BINDNAME, 108,"bindname", NULL, 3, 0, 1, 0, JOF_ATOM|JOF_NAME|JOF_SET)
252     OPDEF(JSOP_SETNAME, 109,"setname", NULL, 3, 2, 1, 3, JOF_ATOM|JOF_NAME|JOF_SET|JOF_DETECTING)
253    
254     /* Exception handling ops. */
255     OPDEF(JSOP_THROW, 110,js_throw_str, NULL, 1, 1, 0, 0, JOF_BYTE)
256    
257     /* 'in' and 'instanceof' ops. */
258     OPDEF(JSOP_IN, 111,js_in_str, js_in_str, 1, 2, 1, 11, JOF_BYTE|JOF_LEFTASSOC)
259     OPDEF(JSOP_INSTANCEOF,112,js_instanceof_str,js_instanceof_str,1,2,1,11,JOF_BYTE|JOF_LEFTASSOC)
260    
261     /* debugger op */
262     OPDEF(JSOP_DEBUGGER, 113,"debugger", NULL, 1, 0, 0, 0, JOF_BYTE)
263    
264     /* gosub/retsub for finally handling */
265     OPDEF(JSOP_GOSUB, 114,"gosub", NULL, 3, 0, 0, 0, JOF_JUMP)
266     OPDEF(JSOP_RETSUB, 115,"retsub", NULL, 1, 2, 0, 0, JOF_BYTE)
267    
268     /* More exception handling ops. */
269     OPDEF(JSOP_EXCEPTION, 116,"exception", NULL, 1, 0, 1, 0, JOF_BYTE)
270    
271     /* Embedded lineno to speedup pc->line mapping. */
272     OPDEF(JSOP_LINENO, 117,"lineno", NULL, 3, 0, 0, 0, JOF_UINT16)
273    
274     /*
275     * ECMA-compliant switch statement ops.
276     * CONDSWITCH is a decompilable NOP; CASE is ===, POP, jump if true, re-push
277     * lval if false; and DEFAULT is POP lval and GOTO.
278     */
279     OPDEF(JSOP_CONDSWITCH,118,"condswitch", NULL, 1, 0, 0, 0, JOF_BYTE|JOF_PARENHEAD)
280     OPDEF(JSOP_CASE, 119,"case", NULL, 3, 2, 1, 0, JOF_JUMP)
281     OPDEF(JSOP_DEFAULT, 120,"default", NULL, 3, 1, 0, 0, JOF_JUMP)
282    
283     /*
284     * ECMA-compliant call to eval op
285     */
286     OPDEF(JSOP_EVAL, 121,"eval", NULL, 3, -1, 1, 18, JOF_UINT16|JOF_INVOKE)
287    
288     /*
289     * ECMA-compliant helper for 'for (x[i] in o)' loops.
290     */
291     OPDEF(JSOP_ENUMELEM, 122,"enumelem", NULL, 1, 3, 0, 3, JOF_BYTE |JOF_SET)
292    
293     /*
294     * Getter and setter prefix bytecodes. These modify the next bytecode, either
295     * an assignment or a property initializer code, which then defines a property
296     * getter or setter.
297     */
298     OPDEF(JSOP_GETTER, 123,js_getter_str,NULL, 1, 0, 0, 0, JOF_BYTE)
299     OPDEF(JSOP_SETTER, 124,js_setter_str,NULL, 1, 0, 0, 0, JOF_BYTE)
300    
301     /*
302     * Prolog bytecodes for defining function, var, and const names.
303     */
304     OPDEF(JSOP_DEFFUN, 125,"deffun", NULL, 3, 0, 0, 0, JOF_OBJECT|JOF_DECLARING)
305     OPDEF(JSOP_DEFCONST, 126,"defconst", NULL, 3, 0, 0, 0, JOF_ATOM|JOF_DECLARING)
306     OPDEF(JSOP_DEFVAR, 127,"defvar", NULL, 3, 0, 0, 0, JOF_ATOM|JOF_DECLARING)
307    
308     /* Auto-clone (if needed due to re-parenting) and push an anonymous function. */
309     OPDEF(JSOP_ANONFUNOBJ, 128, "anonfunobj", NULL, 3, 0, 1, 19, JOF_OBJECT)
310    
311     /* ECMA ed. 3 named function expression. */
312     OPDEF(JSOP_NAMEDFUNOBJ, 129, "namedfunobj", NULL, 3, 0, 1, 19, JOF_OBJECT)
313    
314     /*
315     * Like JSOP_SETLOCAL, but specialized to avoid requiring JSOP_POP immediately
316     * after to throw away the exception value.
317     */
318     OPDEF(JSOP_SETLOCALPOP, 130, "setlocalpop", NULL, 3, 1, 0, 3, JOF_LOCAL|JOF_NAME|JOF_SET)
319    
320     /* Parenthesization opcode to help the decompiler. */
321     OPDEF(JSOP_GROUP, 131, "group", NULL, 1, 0, 0, 19, JOF_BYTE)
322    
323     /*
324     * Host object extension: given 'o.item(i) = j', the left-hand side compiles
325     * JSOP_SETCALL, rather than JSOP_CALL.
326     */
327     OPDEF(JSOP_SETCALL, 132, "setcall", NULL, 3, -1, 2, 18, JOF_UINT16|JOF_SET)
328    
329     /*
330     * Exception handling no-op, for more economical byte-coding than SRC_TRYFIN
331     * srcnote-annotated JSOP_NOPs and to simply stack balance handling.
332     */
333     OPDEF(JSOP_TRY, 133,"try", NULL, 1, 0, 0, 0, JOF_BYTE)
334     OPDEF(JSOP_FINALLY, 134,"finally", NULL, 1, 0, 2, 0, JOF_BYTE)
335    
336     /*
337     * Generic nop for the decompiler.
338     */
339     OPDEF(JSOP_NOP, 135,"nop", NULL, 1, 0, 0, 0, JOF_BYTE)
340    
341     /*
342     * Bytecodes that avoid making an arguments object in most cases:
343     * JSOP_ARGSUB gets arguments[i] from fp->argv, iff i is in [0, fp->argc-1].
344     * JSOP_ARGCNT returns fp->argc.
345     */
346     OPDEF(JSOP_ARGSUB, 136,"argsub", NULL, 3, 0, 1, 18, JOF_QARG |JOF_NAME)
347     OPDEF(JSOP_ARGCNT, 137,"argcnt", NULL, 1, 0, 1, 18, JOF_BYTE)
348    
349     /*
350     * Define a local function object as a local variable.
351     * The local variable's slot number is the first immediate two-byte operand.
352     * The function object's atom index is the second immediate operand.
353     */
354     OPDEF(JSOP_DEFLOCALFUN, 138,"deflocalfun",NULL, 5, 0, 0, 0, JOF_SLOTOBJECT|JOF_DECLARING)
355    
356     /* Extended jumps. */
357     OPDEF(JSOP_GOTOX, 139,"gotox", NULL, 5, 0, 0, 0, JOF_JUMPX)
358     OPDEF(JSOP_IFEQX, 140,"ifeqx", NULL, 5, 1, 0, 4, JOF_JUMPX|JOF_DETECTING)
359     OPDEF(JSOP_IFNEX, 141,"ifnex", NULL, 5, 1, 0, 0, JOF_JUMPX|JOF_PARENHEAD)
360     OPDEF(JSOP_ORX, 142,"orx", NULL, 5, 1, 0, 5, JOF_JUMPX|JOF_DETECTING)
361     OPDEF(JSOP_ANDX, 143,"andx", NULL, 5, 1, 0, 6, JOF_JUMPX|JOF_DETECTING)
362     OPDEF(JSOP_GOSUBX, 144,"gosubx", NULL, 5, 0, 0, 0, JOF_JUMPX)
363     OPDEF(JSOP_CASEX, 145,"casex", NULL, 5, 2, 1, 0, JOF_JUMPX)
364     OPDEF(JSOP_DEFAULTX, 146,"defaultx", NULL, 5, 1, 0, 0, JOF_JUMPX)
365     OPDEF(JSOP_TABLESWITCHX, 147,"tableswitchx",NULL, -1, 1, 0, 0, JOF_TABLESWITCHX|JOF_DETECTING|JOF_PARENHEAD)
366     OPDEF(JSOP_LOOKUPSWITCHX, 148,"lookupswitchx",NULL, -1, 1, 0, 0, JOF_LOOKUPSWITCHX|JOF_DETECTING|JOF_PARENHEAD)
367    
368     /* Placeholders for a real jump opcode set during backpatch chain fixup. */
369     OPDEF(JSOP_BACKPATCH, 149,"backpatch",NULL, 3, 0, 0, 0, JOF_JUMP|JOF_BACKPATCH)
370     OPDEF(JSOP_BACKPATCH_POP, 150,"backpatch_pop",NULL, 3, 1, 0, 0, JOF_JUMP|JOF_BACKPATCH)
371    
372     /* Set pending exception from the stack, to trigger rethrow. */
373     OPDEF(JSOP_THROWING, 151,"throwing", NULL, 1, 1, 0, 0, JOF_BYTE)
374    
375     /* Set and get return value pseudo-register in stack frame. */
376     OPDEF(JSOP_SETRVAL, 152,"setrval", NULL, 1, 1, 0, 2, JOF_BYTE)
377     OPDEF(JSOP_RETRVAL, 153,"retrval", NULL, 1, 0, 0, 0, JOF_BYTE)
378    
379     /* Optimized global variable ops (we don't bother doing a JSOP_FORGVAR op). */
380     OPDEF(JSOP_GETGVAR, 154,"getgvar", NULL, 3, 0, 1, 19, JOF_ATOM|JOF_NAME)
381     OPDEF(JSOP_SETGVAR, 155,"setgvar", NULL, 3, 1, 1, 3, JOF_ATOM|JOF_NAME|JOF_SET|JOF_DETECTING)
382     OPDEF(JSOP_INCGVAR, 156,"incgvar", NULL, 3, 0, 1, 15, JOF_ATOM|JOF_NAME|JOF_INC|JOF_TMPSLOT2)
383     OPDEF(JSOP_DECGVAR, 157,"decgvar", NULL, 3, 0, 1, 15, JOF_ATOM|JOF_NAME|JOF_DEC|JOF_TMPSLOT2)
384     OPDEF(JSOP_GVARINC, 158,"gvarinc", NULL, 3, 0, 1, 15, JOF_ATOM|JOF_NAME|JOF_INC|JOF_POST|JOF_TMPSLOT2)
385     OPDEF(JSOP_GVARDEC, 159,"gvardec", NULL, 3, 0, 1, 15, JOF_ATOM|JOF_NAME|JOF_DEC|JOF_POST|JOF_TMPSLOT2)
386    
387     /* Regular expression literal requiring special "fork on exec" handling. */
388     OPDEF(JSOP_REGEXP, 160,"regexp", NULL, 3, 0, 1, 19, JOF_REGEXP)
389    
390     /* XML (ECMA-357, a.k.a. "E4X") support. */
391     OPDEF(JSOP_DEFXMLNS, 161,"defxmlns", NULL, 1, 1, 0, 0, JOF_BYTE)
392     OPDEF(JSOP_ANYNAME, 162,"anyname", NULL, 1, 0, 1, 19, JOF_BYTE|JOF_XMLNAME)
393     OPDEF(JSOP_QNAMEPART, 163,"qnamepart", NULL, 3, 0, 1, 19, JOF_ATOM|JOF_XMLNAME)
394     OPDEF(JSOP_QNAMECONST, 164,"qnameconst", NULL, 3, 1, 1, 19, JOF_ATOM|JOF_XMLNAME)
395     OPDEF(JSOP_QNAME, 165,"qname", NULL, 1, 2, 1, 0, JOF_BYTE|JOF_XMLNAME)
396     OPDEF(JSOP_TOATTRNAME, 166,"toattrname", NULL, 1, 1, 1, 19, JOF_BYTE|JOF_XMLNAME)
397     OPDEF(JSOP_TOATTRVAL, 167,"toattrval", NULL, 1, 1, 1, 19, JOF_BYTE)
398     OPDEF(JSOP_ADDATTRNAME, 168,"addattrname",NULL, 1, 2, 1, 13, JOF_BYTE)
399     OPDEF(JSOP_ADDATTRVAL, 169,"addattrval", NULL, 1, 2, 1, 13, JOF_BYTE)
400     OPDEF(JSOP_BINDXMLNAME, 170,"bindxmlname",NULL, 1, 1, 2, 3, JOF_BYTE|JOF_SET)
401     OPDEF(JSOP_SETXMLNAME, 171,"setxmlname", NULL, 1, 3, 1, 3, JOF_BYTE|JOF_SET|JOF_DETECTING)
402     OPDEF(JSOP_XMLNAME, 172,"xmlname", NULL, 1, 1, 1, 19, JOF_BYTE)
403     OPDEF(JSOP_DESCENDANTS, 173,"descendants",NULL, 1, 2, 1, 18, JOF_BYTE)
404     OPDEF(JSOP_FILTER, 174,"filter", NULL, 3, 1, 1, 0, JOF_JUMP)
405     OPDEF(JSOP_ENDFILTER, 175,"endfilter", NULL, 3, 2, 1, 18, JOF_JUMP)
406     OPDEF(JSOP_TOXML, 176,"toxml", NULL, 1, 1, 1, 19, JOF_BYTE)
407     OPDEF(JSOP_TOXMLLIST, 177,"toxmllist", NULL, 1, 1, 1, 19, JOF_BYTE)
408     OPDEF(JSOP_XMLTAGEXPR, 178,"xmltagexpr", NULL, 1, 1, 1, 0, JOF_BYTE)
409     OPDEF(JSOP_XMLELTEXPR, 179,"xmleltexpr", NULL, 1, 1, 1, 0, JOF_BYTE)
410     OPDEF(JSOP_XMLOBJECT, 180,"xmlobject", NULL, 3, 0, 1, 19, JOF_OBJECT)
411     OPDEF(JSOP_XMLCDATA, 181,"xmlcdata", NULL, 3, 0, 1, 19, JOF_ATOM)
412     OPDEF(JSOP_XMLCOMMENT, 182,"xmlcomment", NULL, 3, 0, 1, 19, JOF_ATOM)
413     OPDEF(JSOP_XMLPI, 183,"xmlpi", NULL, 3, 1, 1, 19, JOF_ATOM)
414     OPDEF(JSOP_CALLPROP, 184,"callprop", NULL, 3, 1, 2, 18, JOF_ATOM|JOF_PROP|JOF_CALLOP)
415     OPDEF(JSOP_GETFUNNS, 185,"getfunns", NULL, 1, 0, 1, 19, JOF_BYTE)
416    
417     /*
418     * Get a display (free) variable from the closure's reserved slots.
419     */
420     OPDEF(JSOP_GETUPVAR, 186,"getupvar", NULL, 3, 0, 1, 19, JOF_UINT16|JOF_NAME)
421    
422     OPDEF(JSOP_DELDESC, 187,"deldesc", NULL, 1, 2, 1, 17, JOF_BYTE |JOF_ELEM|JOF_DEL)
423    
424     /*
425     * Opcode to hold 24-bit immediate integer operands.
426     */
427     OPDEF(JSOP_UINT24, 188,"uint24", NULL, 4, 0, 1, 16, JOF_UINT24)
428    
429     /*
430     * Opcodes to allow 24-bit atom or object indexes. Whenever an index exceeds
431     * the 16-bit limit, the index-accessing bytecode must be bracketed by
432     * JSOP_INDEXBASE and JSOP_RESETBASE to provide the upper bits of the index.
433     * See jsemit.c, EmitIndexOp.
434     */
435     OPDEF(JSOP_INDEXBASE, 189,"atombase", NULL, 2, 0, 0, 0, JOF_UINT8|JOF_INDEXBASE)
436     OPDEF(JSOP_RESETBASE, 190,"resetbase", NULL, 1, 0, 0, 0, JOF_BYTE)
437     OPDEF(JSOP_RESETBASE0, 191,"resetbase0", NULL, 1, 0, 0, 0, JOF_BYTE)
438    
439     /*
440     * Opcodes to help the decompiler deal with XML.
441     */
442     OPDEF(JSOP_STARTXML, 192,"startxml", NULL, 1, 0, 0, 0, JOF_BYTE)
443     OPDEF(JSOP_STARTXMLEXPR, 193,"startxmlexpr",NULL, 1, 0, 0, 0, JOF_BYTE)
444    
445     OPDEF(JSOP_CALLELEM, 194, "callelem", NULL, 1, 2, 2, 18, JOF_BYTE |JOF_ELEM|JOF_LEFTASSOC|JOF_CALLOP)
446    
447     /*
448     * Stop interpretation, emitted at end of script to save the threaded bytecode
449     * interpreter an extra branch test on every DO_NEXT_OP (see jsinterp.c).
450     */
451     OPDEF(JSOP_STOP, 195,"stop", NULL, 1, 0, 0, 0, JOF_BYTE)
452    
453     /*
454     * Get an extant property value, throwing ReferenceError if the identified
455     * property does not exist.
456     */
457     OPDEF(JSOP_GETXPROP, 196,"getxprop", NULL, 3, 1, 1, 18, JOF_ATOM|JOF_PROP)
458    
459     OPDEF(JSOP_CALLXMLNAME, 197, "callxmlname", NULL, 1, 1, 2, 19, JOF_BYTE|JOF_CALLOP)
460    
461     /*
462     * Specialized JSOP_TYPEOF to avoid reporting undefined for typeof(0, undef).
463     */
464     OPDEF(JSOP_TYPEOFEXPR, 198,"typeofexpr", NULL, 1, 1, 1, 15, JOF_BYTE|JOF_DETECTING)
465    
466     /*
467     * Block-local scope support.
468     */
469     OPDEF(JSOP_ENTERBLOCK, 199,"enterblock", NULL, 3, 0, -1, 0, JOF_OBJECT)
470     OPDEF(JSOP_LEAVEBLOCK, 200,"leaveblock", NULL, 3, -1, 0, 0, JOF_UINT16)
471     OPDEF(JSOP_UNUSED201, 201,"unused201", NULL, 1, 0, 0, 0, JOF_BYTE)
472     OPDEF(JSOP_UNUSED202, 202,"unused202", NULL, 1, 0, 0, 0, JOF_BYTE)
473     OPDEF(JSOP_UNUSED203, 203,"unused203", NULL, 1, 0, 0, 0, JOF_BYTE)
474     OPDEF(JSOP_UNUSED204, 204,"unused204", NULL, 1, 0, 0, 0, JOF_BYTE)
475     OPDEF(JSOP_UNUSED205, 205,"unused205", NULL, 1, 0, 0, 0, JOF_BYTE)
476     OPDEF(JSOP_UNUSED206, 206,"unused206", NULL, 1, 0, 0, 0, JOF_BYTE)
477     OPDEF(JSOP_UNUSED207, 207,"unused207", NULL, 1, 0, 0, 0, JOF_BYTE)
478    
479     /*
480     * Iterator, generator, and array comprehension support.
481     */
482     OPDEF(JSOP_FORCONST, 208,"forconst", NULL, 3, 0, 1, 19, JOF_LOCAL|JOF_NAME|JOF_FOR)
483     OPDEF(JSOP_ENDITER, 209,"enditer", NULL, 1, 1, 0, 0, JOF_BYTE|JOF_TMPSLOT)
484     OPDEF(JSOP_GENERATOR, 210,"generator", NULL, 1, 0, 0, 0, JOF_BYTE)
485     OPDEF(JSOP_YIELD, 211,"yield", NULL, 1, 1, 1, 1, JOF_BYTE)
486     OPDEF(JSOP_ARRAYPUSH, 212,"arraypush", NULL, 3, 1, 0, 3, JOF_LOCAL)
487    
488     /*
489     * In the forthcoming great opcode reorg, this should go next to JSOP_GETUPVAR.
490     */
491     OPDEF(JSOP_CALLUPVAR, 213, "callupvar", NULL, 3, 0, 2, 19, JOF_UINT16|JOF_NAME|JOF_CALLOP)
492    
493     /*
494     * Variant of JSOP_ENUMELEM for destructuring const (const [a, b] = ...).
495     */
496     OPDEF(JSOP_ENUMCONSTELEM, 214,"enumconstelem",NULL, 1, 3, 0, 3, JOF_BYTE|JOF_SET)
497    
498     /*
499     * Variant of JSOP_LEAVEBLOCK has a result on the stack above the locals,
500     * which must be moved down when the block pops.
501     */
502     OPDEF(JSOP_LEAVEBLOCKEXPR,215,"leaveblockexpr",NULL, 3, -1, 1, 1, JOF_UINT16)
503    
504     /*
505     * Optimize common JSOP_{THIS,GET{ARG,LOCAL}} -> JSOP_GETPROP cliches.
506     */
507     OPDEF(JSOP_GETTHISPROP, 216,"getthisprop", NULL, 3, 0, 1, 18, JOF_ATOM|JOF_VARPROP)
508     OPDEF(JSOP_GETARGPROP, 217,"getargprop", NULL, 5, 0, 1, 18, JOF_SLOTATOM|JOF_VARPROP)
509     OPDEF(JSOP_GETLOCALPROP, 218,"getlocalprop", NULL, 5, 0, 1, 18, JOF_SLOTATOM|JOF_VARPROP)
510     OPDEF(JSOP_UNUSED219, 219,"unused219", NULL, 1, 0, 0, 0, JOF_BYTE)
511    
512     /*
513     * Optimize atom segments 1-3. These must be followed by JSOP_RESETBASE0 after
514     * the opcode that they prefix.
515     */
516     OPDEF(JSOP_INDEXBASE1, 220,"atombase1", NULL, 1, 0, 0, 0, JOF_BYTE |JOF_INDEXBASE)
517     OPDEF(JSOP_INDEXBASE2, 221,"atombase2", NULL, 1, 0, 0, 0, JOF_BYTE |JOF_INDEXBASE)
518     OPDEF(JSOP_INDEXBASE3, 222,"atombase3", NULL, 1, 0, 0, 0, JOF_BYTE |JOF_INDEXBASE)
519    
520     OPDEF(JSOP_CALLGVAR, 223, "callgvar", NULL, 3, 0, 2, 19, JOF_ATOM|JOF_NAME|JOF_CALLOP)
521     OPDEF(JSOP_CALLLOCAL, 224, "calllocal", NULL, 3, 0, 2, 19, JOF_LOCAL|JOF_NAME|JOF_CALLOP)
522     OPDEF(JSOP_CALLARG, 225, "callarg", NULL, 3, 0, 2, 19, JOF_QARG |JOF_NAME|JOF_CALLOP)
523     OPDEF(JSOP_UNUSED226, 226, "unused226", NULL, 1, 0, 1, 1, JOF_BYTE)
524    
525     /*
526     * Opcodes to hold 8-bit and 32-bit immediate integer operands.
527     */
528     OPDEF(JSOP_INT8, 227, "int8", NULL, 2, 0, 1, 16, JOF_INT8)
529     OPDEF(JSOP_INT32, 228, "int32", NULL, 5, 0, 1, 16, JOF_INT32)
530    
531     /*
532     * Get the value of the 'length' property from a stacked object.
533     */
534     OPDEF(JSOP_LENGTH, 229, "length", NULL, 1, 1, 1, 18, JOF_BYTE|JOF_PROP)
535    
536     /*
537     * JSOP_NEWARRAY optimizes array literal evaluation using the interpreter stack.
538     * JSOP_HOLE pushes a JSVAL_HOLE (used with JSOP_NEWINIT and JSOP_NEWARRAY).
539     */
540     OPDEF(JSOP_NEWARRAY, 230, "newarray", NULL, 4, -1, 1, 19, JOF_UINT24)
541     OPDEF(JSOP_HOLE, 231, "hole", NULL, 1, 0, 1, 0, JOF_BYTE)

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