bc2d3f5307
evaluate the case label each time. Still to do is to optimize so that TABLESWITCH and LOOKUPSWITCH are created when possible. git-svn-id: svn://10.0.0.236/trunk@9296 18797224-902f-48f8-a5cc-f745e15eee43
190 lines
6.8 KiB
C
190 lines
6.8 KiB
C
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#ifndef jsopcode_h___
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#define jsopcode_h___
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/*
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* JS bytecode definitions.
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*/
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#include <stddef.h>
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#include "jsprvtd.h"
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#include "jspubtd.h"
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PR_BEGIN_EXTERN_C
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/*
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* JS operation bytecodes.
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*/
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typedef enum JSOp {
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#define OPDEF(op,val,name,token,length,nuses,ndefs,prec,format) \
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op = val,
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#include "jsopcode.def"
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#undef OPDEF
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JSOP_LIMIT
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} JSOp;
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/*
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* JS bytecode formats.
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*/
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#define JOF_BYTE 0 /* single bytecode, no immediates */
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#define JOF_JUMP 1 /* signed 16-bit jump offset immediate */
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#define JOF_CONST 2 /* unsigned 16-bit constant pool index */
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#define JOF_UINT16 3 /* unsigned 16-bit immediate operand */
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#define JOF_TABLESWITCH 4 /* table switch */
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#define JOF_LOOKUPSWITCH 5 /* lookup switch */
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#define JOF_CONDSWITCH 6 /* cond switch */
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#define JOF_QARG 7 /* quickened get/set function argument ops */
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#define JOF_QVAR 8 /* quickened get/set local variable ops */
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#define JOF_TYPEMASK 0x000f /* mask for above immediate types */
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#define JOF_NAME 0x0010 /* name operation */
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#define JOF_PROP 0x0020 /* obj.prop operation */
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#define JOF_ELEM 0x0030 /* obj[index] operation */
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#define JOF_MODEMASK 0x0030 /* mask for above addressing modes */
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#define JOF_SET 0x0040 /* set (i.e., assignment) operation */
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#define JOF_DEL 0x0080 /* delete operation */
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#define JOF_DEC 0x0100 /* decrement (--, not ++) opcode */
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#define JOF_INC 0x0200 /* increment (++, not --) opcode */
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#define JOF_INCDEC 0x0300 /* increment or decrement opcode */
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#define JOF_POST 0x0400 /* postorder increment or decrement */
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#define JOF_IMPORT 0x0800 /* import property op */
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#define JOF_FOR2 0x1000 /* new for/in loop bytecodes */
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/*
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* Immediate operand getters, setters, and bounds.
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*/
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#define JUMP_OFFSET_LEN 2
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#define JUMP_OFFSET_HI(off) ((jsbytecode)((off) >> 8))
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#define JUMP_OFFSET_LO(off) ((jsbytecode)(off))
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#define GET_JUMP_OFFSET(pc) ((int16)(((pc)[1] << 8) | (pc)[2]))
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#define SET_JUMP_OFFSET(pc,off) ((pc)[1] = JUMP_OFFSET_HI(off), \
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(pc)[2] = JUMP_OFFSET_LO(off))
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#define JUMP_OFFSET_MIN ((int16)0x8000)
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#define JUMP_OFFSET_MAX ((int16)0x7fff)
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#define ATOM_INDEX_LEN 2
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#define ATOM_INDEX_HI(index) ((jsbytecode)((index) >> 8))
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#define ATOM_INDEX_LO(index) ((jsbytecode)(index))
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#define GET_ATOM_INDEX(pc) (((pc)[1] << 8) | (pc)[2])
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#define SET_ATOM_INDEX(pc,index)((pc)[1] = ATOM_INDEX_HI(index), \
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(pc)[2] = ATOM_INDEX_LO(index))
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#define GET_ATOM(cx,script,pc) js_GetAtom((cx), &(script)->atomMap, \
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GET_ATOM_INDEX(pc))
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#define ATOM_INDEX_LIMIT_LOG2 16
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#define ATOM_INDEX_LIMIT ((uint32)1 << ATOM_INDEX_LIMIT_LOG2)
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#define ARGC_HI(argc) ((jsbytecode)((argc) >> 8))
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#define ARGC_LO(argc) ((jsbytecode)(argc))
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#define GET_ARGC(pc) (((pc)[1] << 8) | (pc)[2])
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#define ARGC_LIMIT ((uint32)1 << 16)
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/* Synonyms for quick JOF_QARG and JOF_QVAR bytecodes. */
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#define GET_ARGNO(pc) GET_ARGC(pc)
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#define SET_ARGNO(pc,argno) SET_JUMP_OFFSET(pc,argno)
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#define GET_VARNO(pc) GET_ARGC(pc)
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#define SET_VARNO(pc,varno) SET_JUMP_OFFSET(pc,varno)
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struct JSCodeSpec {
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const char *name; /* JS bytecode name */
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const char *token; /* JS source literal or null */
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int8 length; /* length including opcode byte */
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int8 nuses; /* arity, -1 if variadic */
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int8 ndefs; /* number of stack results */
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uint8 prec; /* operator precedence */
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uint32 format; /* immediate operand format */
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};
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extern char js_in_str[];
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extern char js_instanceof_str[];
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extern char js_new_str[];
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extern char js_delete_str[];
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extern char js_typeof_str[];
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extern char js_void_str[];
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extern char js_null_str[];
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extern char js_this_str[];
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extern char js_false_str[];
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extern char js_true_str[];
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extern JSCodeSpec js_CodeSpec[];
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extern uintN js_NumCodeSpecs;
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extern jschar js_EscapeMap[];
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/*
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* Return a GC'ed string containing the chars in str, with any non-printing
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* chars or quotes (' or " as specified by the quote argument) escaped, and
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* with the quote character at the beginning and end of the result string.
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*/
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extern JSString *
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js_QuoteString(JSContext *cx, JSString *str, jschar quote);
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/*
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* JSPrinter operations, for printf style message formatting. The return
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* value from js_GetPrinterOutput() is the printer's cumulative output, in
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* a GC'ed string.
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*/
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extern JSPrinter *
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js_NewPrinter(JSContext *cx, const char *name, uintN indent);
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extern void
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js_DestroyPrinter(JSPrinter *jp);
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extern JSString *
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js_GetPrinterOutput(JSPrinter *jp);
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extern int
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js_printf(JSPrinter *jp, char *format, ...);
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extern JSBool
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js_puts(JSPrinter *jp, char *s);
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#ifdef DEBUG
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/*
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* Disassemblers, for debugging only.
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*/
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#include <stdio.h>
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extern JS_FRIEND_API(void)
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js_Disassemble(JSContext *cx, JSScript *script, JSBool lines, FILE *fp);
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extern JS_FRIEND_API(uintN)
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js_Disassemble1(JSContext *cx, JSScript *script, jsbytecode *pc, uintN loc,
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JSBool lines, FILE *fp);
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#endif /* DEBUG */
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/*
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* Decompilers, for script, function, and expression pretty-printing.
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*/
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extern JSBool
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js_DecompileCode(JSPrinter *jp, JSScript *script, jsbytecode *pc, uintN len);
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extern JSBool
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js_DecompileScript(JSPrinter *jp, JSScript *script);
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extern JSBool
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js_DecompileFunction(JSPrinter *jp, JSFunction *fun, JSBool newlines);
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/*
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* Find the source expression that resulted in v, and return a new string
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* containing it. Fall back on v's string conversion if we can't find the
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* bytecode that generated and pushed v on the operand stack.
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*/
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extern JSString *
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js_DecompileValueGenerator(JSContext *cx, jsval v, JSString *fallback);
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PR_END_EXTERN_C
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#endif /* jsopcode_h___ */
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