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Viewing changes to Source/JavaScriptCore/dfg/DFGOperations.h

  • Committer: Package Import Robot
  • Author(s): Jonathan Riddell
  • Date: 2013-02-18 14:24:18 UTC
  • Revision ID: package-import@ubuntu.com-20130218142418-eon0jmjg3nj438uy
Tags: upstream-2.3
Import upstream version 2.3

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Source/JavaScriptCore/dfg/DFGOperations.h
 
1
/*
 
2
 * Copyright (C) 2011 Apple Inc. All rights reserved.
 
3
 *
 
4
 * Redistribution and use in source and binary forms, with or without
 
5
 * modification, are permitted provided that the following conditions
 
6
 * are met:
 
7
 * 1. Redistributions of source code must retain the above copyright
 
8
 *    notice, this list of conditions and the following disclaimer.
 
9
 * 2. Redistributions in binary form must reproduce the above copyright
 
10
 *    notice, this list of conditions and the following disclaimer in the
 
11
 *    documentation and/or other materials provided with the distribution.
 
12
 *
 
13
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
 
14
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 
15
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 
16
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
 
17
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 
18
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 
19
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 
20
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 
21
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 
22
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 
23
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 
24
 */
 
25
 
 
26
#ifndef DFGOperations_h
 
27
#define DFGOperations_h
 
28
 
 
29
#if ENABLE(DFG_JIT)
 
30
 
 
31
#include "DFGJITCompiler.h"
 
32
#include "PutKind.h"
 
33
 
 
34
namespace JSC {
 
35
 
 
36
namespace DFG {
 
37
 
 
38
extern "C" {
 
39
 
 
40
#if CALLING_CONVENTION_IS_STDCALL
 
41
#define DFG_OPERATION CDECL
 
42
#else
 
43
#define DFG_OPERATION
 
44
#endif
 
45
 
 
46
// These typedefs provide typechecking when generating calls out to helper routines;
 
47
// this helps prevent calling a helper routine with the wrong arguments!
 
48
/*
 
49
    Key:
 
50
    V: void
 
51
    J: JSValue
 
52
    P: pointer (void*)
 
53
    C: JSCell*
 
54
    A: JSArray*
 
55
    S: size_t
 
56
    Z: int32_t
 
57
    D: double
 
58
    I: Identifier*
 
59
    G: GlobalResolveInfo*
 
60
*/
 
61
typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_E)(ExecState*);
 
62
typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EA)(ExecState*, JSArray*);
 
63
typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EAZ)(ExecState*, JSArray*, int32_t);
 
64
typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_ECC)(ExecState*, JSCell*, JSCell*);
 
65
typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_ECI)(ExecState*, JSCell*, Identifier*);
 
66
typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_ECJ)(ExecState*, JSCell*, EncodedJSValue);
 
67
typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EDA)(ExecState*, double, JSArray*);
 
68
typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EGriJsgI)(ExecState*, ResolveOperation*, JSGlobalObject*, Identifier*);
 
69
typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EI)(ExecState*, Identifier*);
 
70
typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EIRo)(ExecState*, Identifier*, ResolveOperations*);
 
71
typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EIRoPtbo)(ExecState*, Identifier*, ResolveOperations*, PutToBaseOperation*);
 
72
typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EJ)(ExecState*, EncodedJSValue);
 
73
typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EJA)(ExecState*, EncodedJSValue, JSArray*);
 
74
typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EJI)(ExecState*, EncodedJSValue, Identifier*);
 
75
typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EJJ)(ExecState*, EncodedJSValue, EncodedJSValue);
 
76
typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EJP)(ExecState*, EncodedJSValue, void*);
 
77
typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EP)(ExecState*, void*);
 
78
typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EPP)(ExecState*, void*, void*);
 
79
typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EPS)(ExecState*, void*, size_t);
 
80
typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_ESS)(ExecState*, size_t, size_t);
 
81
typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EZ)(ExecState*, int32_t);
 
82
typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EZIcfZ)(ExecState*, int32_t, InlineCallFrame*, int32_t);
 
83
typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EZZ)(ExecState*, int32_t, int32_t);
 
84
typedef JSCell* DFG_OPERATION (*C_DFGOperation_E)(ExecState*);
 
85
typedef JSCell* DFG_OPERATION (*C_DFGOperation_EC)(ExecState*, JSCell*);
 
86
typedef JSCell* DFG_OPERATION (*C_DFGOperation_ECC)(ExecState*, JSCell*, JSCell*);
 
87
typedef JSCell* DFG_OPERATION (*C_DFGOperation_EIcf)(ExecState*, InlineCallFrame*);
 
88
typedef JSCell* DFG_OPERATION (*C_DFGOperation_ESt)(ExecState*, Structure*);
 
89
typedef double DFG_OPERATION (*D_DFGOperation_DD)(double, double);
 
90
typedef double DFG_OPERATION (*D_DFGOperation_ZZ)(int32_t, int32_t);
 
91
typedef double DFG_OPERATION (*D_DFGOperation_EJ)(ExecState*, EncodedJSValue);
 
92
typedef int32_t DFG_OPERATION (*Z_DFGOperation_D)(double);
 
93
typedef size_t DFG_OPERATION (*S_DFGOperation_ECC)(ExecState*, JSCell*, JSCell*);
 
94
typedef size_t DFG_OPERATION (*S_DFGOperation_EJ)(ExecState*, EncodedJSValue);
 
95
typedef size_t DFG_OPERATION (*S_DFGOperation_EJJ)(ExecState*, EncodedJSValue, EncodedJSValue);
 
96
typedef size_t DFG_OPERATION (*S_DFGOperation_J)(EncodedJSValue);
 
97
typedef void DFG_OPERATION (*V_DFGOperation_EOZD)(ExecState*, JSObject*, int32_t, double);
 
98
typedef void DFG_OPERATION (*V_DFGOperation_EOZJ)(ExecState*, JSObject*, int32_t, EncodedJSValue);
 
99
typedef void DFG_OPERATION (*V_DFGOperation_EC)(ExecState*, JSCell*);
 
100
typedef void DFG_OPERATION (*V_DFGOperation_ECIcf)(ExecState*, JSCell*, InlineCallFrame*);
 
101
typedef void DFG_OPERATION (*V_DFGOperation_ECCIcf)(ExecState*, JSCell*, JSCell*, InlineCallFrame*);
 
102
typedef void DFG_OPERATION (*V_DFGOperation_ECJJ)(ExecState*, JSCell*, EncodedJSValue, EncodedJSValue);
 
103
typedef void DFG_OPERATION (*V_DFGOperation_ECZ)(ExecState*, JSCell*, int32_t);
 
104
typedef void DFG_OPERATION (*V_DFGOperation_ECC)(ExecState*, JSCell*, JSCell*);
 
105
typedef void DFG_OPERATION (*V_DFGOperation_EJCI)(ExecState*, EncodedJSValue, JSCell*, Identifier*);
 
106
typedef void DFG_OPERATION (*V_DFGOperation_EJJJ)(ExecState*, EncodedJSValue, EncodedJSValue, EncodedJSValue);
 
107
typedef void DFG_OPERATION (*V_DFGOperation_EJPP)(ExecState*, EncodedJSValue, EncodedJSValue, void*);
 
108
typedef void DFG_OPERATION (*V_DFGOperation_EPZJ)(ExecState*, void*, int32_t, EncodedJSValue);
 
109
typedef void DFG_OPERATION (*V_DFGOperation_W)(WatchpointSet*);
 
110
typedef char* DFG_OPERATION (*P_DFGOperation_E)(ExecState*);
 
111
typedef char* DFG_OPERATION (*P_DFGOperation_EO)(ExecState*, JSObject*);
 
112
typedef char* DFG_OPERATION (*P_DFGOperation_EOS)(ExecState*, JSObject*, size_t);
 
113
typedef char* DFG_OPERATION (*P_DFGOperation_EOZ)(ExecState*, JSObject*, int32_t);
 
114
typedef char* DFG_OPERATION (*P_DFGOperation_EPS)(ExecState*, void*, size_t);
 
115
typedef char* DFG_OPERATION (*P_DFGOperation_ES)(ExecState*, size_t);
 
116
typedef char* DFG_OPERATION (*P_DFGOperation_ESt)(ExecState*, Structure*);
 
117
typedef char* DFG_OPERATION (*P_DFGOperation_EStPS)(ExecState*, Structure*, void*, size_t);
 
118
typedef char* DFG_OPERATION (*P_DFGOperation_EStSS)(ExecState*, Structure*, size_t, size_t);
 
119
typedef char* DFG_OPERATION (*P_DFGOperation_EStZ)(ExecState*, Structure*, int32_t);
 
120
 
 
121
// These routines are provide callbacks out to C++ implementations of operations too complex to JIT.
 
122
JSCell* DFG_OPERATION operationNewObject(ExecState*, Structure*) WTF_INTERNAL;
 
123
JSCell* DFG_OPERATION operationCreateThis(ExecState*, JSCell* constructor) WTF_INTERNAL;
 
124
EncodedJSValue DFG_OPERATION operationConvertThis(ExecState*, EncodedJSValue encodedOp1) WTF_INTERNAL;
 
125
EncodedJSValue DFG_OPERATION operationValueAdd(ExecState*, EncodedJSValue encodedOp1, EncodedJSValue encodedOp2) WTF_INTERNAL;
 
126
EncodedJSValue DFG_OPERATION operationValueAddNotNumber(ExecState*, EncodedJSValue encodedOp1, EncodedJSValue encodedOp2) WTF_INTERNAL;
 
127
EncodedJSValue DFG_OPERATION operationGetByVal(ExecState*, EncodedJSValue encodedBase, EncodedJSValue encodedProperty) WTF_INTERNAL;
 
128
EncodedJSValue DFG_OPERATION operationGetByValCell(ExecState*, JSCell*, EncodedJSValue encodedProperty) WTF_INTERNAL;
 
129
EncodedJSValue DFG_OPERATION operationGetByValArrayInt(ExecState*, JSArray*, int32_t) WTF_INTERNAL;
 
130
EncodedJSValue DFG_OPERATION operationGetById(ExecState*, EncodedJSValue, Identifier*) WTF_INTERNAL;
 
131
EncodedJSValue DFG_OPERATION operationGetByIdBuildList(ExecState*, EncodedJSValue, Identifier*) WTF_INTERNAL;
 
132
EncodedJSValue DFG_OPERATION operationGetByIdProtoBuildList(ExecState*, EncodedJSValue, Identifier*) WTF_INTERNAL;
 
133
EncodedJSValue DFG_OPERATION operationGetByIdOptimize(ExecState*, EncodedJSValue, Identifier*) WTF_INTERNAL;
 
134
EncodedJSValue DFG_OPERATION operationCallCustomGetter(ExecState*, JSCell*, PropertySlot::GetValueFunc, Identifier*) WTF_INTERNAL;
 
135
EncodedJSValue DFG_OPERATION operationCallGetter(ExecState*, JSCell*, JSCell*) WTF_INTERNAL;
 
136
void DFG_OPERATION operationNotifyGlobalVarWrite(WatchpointSet* watchpointSet) WTF_INTERNAL;
 
137
EncodedJSValue DFG_OPERATION operationResolve(ExecState*, Identifier*, ResolveOperations*) WTF_INTERNAL;
 
138
EncodedJSValue DFG_OPERATION operationResolveBase(ExecState*, Identifier*, ResolveOperations*, PutToBaseOperation*) WTF_INTERNAL;
 
139
EncodedJSValue DFG_OPERATION operationResolveBaseStrictPut(ExecState*, Identifier*, ResolveOperations*, PutToBaseOperation*) WTF_INTERNAL;
 
140
EncodedJSValue DFG_OPERATION operationResolveGlobal(ExecState*, ResolveOperation*, JSGlobalObject*, Identifier*) WTF_INTERNAL;
 
141
EncodedJSValue DFG_OPERATION operationToPrimitive(ExecState*, EncodedJSValue) WTF_INTERNAL;
 
142
EncodedJSValue DFG_OPERATION operationStrCat(ExecState*, void*, size_t) WTF_INTERNAL;
 
143
char* DFG_OPERATION operationNewArray(ExecState*, Structure*, void*, size_t) WTF_INTERNAL;
 
144
char* DFG_OPERATION operationNewArrayBuffer(ExecState*, Structure*, size_t, size_t) WTF_INTERNAL;
 
145
char* DFG_OPERATION operationNewEmptyArray(ExecState*, Structure*) WTF_INTERNAL;
 
146
char* DFG_OPERATION operationNewArrayWithSize(ExecState*, Structure*, int32_t) WTF_INTERNAL;
 
147
EncodedJSValue DFG_OPERATION operationNewRegexp(ExecState*, void*) WTF_INTERNAL;
 
148
void DFG_OPERATION operationPutByValStrict(ExecState*, EncodedJSValue encodedBase, EncodedJSValue encodedProperty, EncodedJSValue encodedValue) WTF_INTERNAL;
 
149
void DFG_OPERATION operationPutByValNonStrict(ExecState*, EncodedJSValue encodedBase, EncodedJSValue encodedProperty, EncodedJSValue encodedValue) WTF_INTERNAL;
 
150
void DFG_OPERATION operationPutByValCellStrict(ExecState*, JSCell*, EncodedJSValue encodedProperty, EncodedJSValue encodedValue) WTF_INTERNAL;
 
151
void DFG_OPERATION operationPutByValCellNonStrict(ExecState*, JSCell*, EncodedJSValue encodedProperty, EncodedJSValue encodedValue) WTF_INTERNAL;
 
152
void DFG_OPERATION operationPutByValBeyondArrayBoundsStrict(ExecState*, JSObject*, int32_t index, EncodedJSValue encodedValue) WTF_INTERNAL;
 
153
void DFG_OPERATION operationPutByValBeyondArrayBoundsNonStrict(ExecState*, JSObject*, int32_t index, EncodedJSValue encodedValue) WTF_INTERNAL;
 
154
void DFG_OPERATION operationPutDoubleByValBeyondArrayBoundsStrict(ExecState*, JSObject*, int32_t index, double value) WTF_INTERNAL;
 
155
void DFG_OPERATION operationPutDoubleByValBeyondArrayBoundsNonStrict(ExecState*, JSObject*, int32_t index, double value) WTF_INTERNAL;
 
156
EncodedJSValue DFG_OPERATION operationArrayPush(ExecState*, EncodedJSValue encodedValue, JSArray*) WTF_INTERNAL;
 
157
EncodedJSValue DFG_OPERATION operationArrayPushDouble(ExecState*, double value, JSArray*) WTF_INTERNAL;
 
158
EncodedJSValue DFG_OPERATION operationArrayPop(ExecState*, JSArray*) WTF_INTERNAL;
 
159
EncodedJSValue DFG_OPERATION operationArrayPopAndRecoverLength(ExecState*, JSArray*) WTF_INTERNAL;
 
160
EncodedJSValue DFG_OPERATION operationRegExpExec(ExecState*, JSCell*, JSCell*) WTF_INTERNAL;
 
161
void DFG_OPERATION operationPutByIdStrict(ExecState*, EncodedJSValue encodedValue, JSCell* base, Identifier*) WTF_INTERNAL;
 
162
void DFG_OPERATION operationPutByIdNonStrict(ExecState*, EncodedJSValue encodedValue, JSCell* base, Identifier*) WTF_INTERNAL;
 
163
void DFG_OPERATION operationPutByIdDirectStrict(ExecState*, EncodedJSValue encodedValue, JSCell* base, Identifier*) WTF_INTERNAL;
 
164
void DFG_OPERATION operationPutByIdDirectNonStrict(ExecState*, EncodedJSValue encodedValue, JSCell* base, Identifier*) WTF_INTERNAL;
 
165
void DFG_OPERATION operationPutByIdStrictOptimize(ExecState*, EncodedJSValue encodedValue, JSCell* base, Identifier*) WTF_INTERNAL;
 
166
void DFG_OPERATION operationPutByIdNonStrictOptimize(ExecState*, EncodedJSValue encodedValue, JSCell* base, Identifier*) WTF_INTERNAL;
 
167
void DFG_OPERATION operationPutByIdDirectStrictOptimize(ExecState*, EncodedJSValue encodedValue, JSCell* base, Identifier*) WTF_INTERNAL;
 
168
void DFG_OPERATION operationPutByIdDirectNonStrictOptimize(ExecState*, EncodedJSValue encodedValue, JSCell* base, Identifier*) WTF_INTERNAL;
 
169
void DFG_OPERATION operationPutByIdStrictBuildList(ExecState*, EncodedJSValue encodedValue, JSCell* base, Identifier*) WTF_INTERNAL;
 
170
void DFG_OPERATION operationPutByIdNonStrictBuildList(ExecState*, EncodedJSValue encodedValue, JSCell* base, Identifier*) WTF_INTERNAL;
 
171
void DFG_OPERATION operationPutByIdDirectStrictBuildList(ExecState*, EncodedJSValue encodedValue, JSCell* base, Identifier*) WTF_INTERNAL;
 
172
void DFG_OPERATION operationPutByIdDirectNonStrictBuildList(ExecState*, EncodedJSValue encodedValue, JSCell* base, Identifier*) WTF_INTERNAL;
 
173
// These comparisons return a boolean within a size_t such that the value is zero extended to fill the register.
 
174
size_t DFG_OPERATION operationRegExpTest(ExecState*, JSCell*, JSCell*) WTF_INTERNAL;
 
175
size_t DFG_OPERATION operationCompareLess(ExecState*, EncodedJSValue encodedOp1, EncodedJSValue encodedOp2) WTF_INTERNAL;
 
176
size_t DFG_OPERATION operationCompareLessEq(ExecState*, EncodedJSValue encodedOp1, EncodedJSValue encodedOp2) WTF_INTERNAL;
 
177
size_t DFG_OPERATION operationCompareGreater(ExecState*, EncodedJSValue encodedOp1, EncodedJSValue encodedOp2) WTF_INTERNAL;
 
178
size_t DFG_OPERATION operationCompareGreaterEq(ExecState*, EncodedJSValue encodedOp1, EncodedJSValue encodedOp2) WTF_INTERNAL;
 
179
size_t DFG_OPERATION operationCompareEq(ExecState*, EncodedJSValue encodedOp1, EncodedJSValue encodedOp2) WTF_INTERNAL;
 
180
size_t DFG_OPERATION operationCompareStrictEqCell(ExecState*, EncodedJSValue encodedOp1, EncodedJSValue encodedOp2) WTF_INTERNAL;
 
181
size_t DFG_OPERATION operationCompareStrictEq(ExecState*, EncodedJSValue encodedOp1, EncodedJSValue encodedOp2) WTF_INTERNAL;
 
182
char* DFG_OPERATION operationVirtualCall(ExecState*) WTF_INTERNAL;
 
183
char* DFG_OPERATION operationLinkCall(ExecState*) WTF_INTERNAL;
 
184
char* DFG_OPERATION operationLinkClosureCall(ExecState*) WTF_INTERNAL;
 
185
char* DFG_OPERATION operationVirtualConstruct(ExecState*) WTF_INTERNAL;
 
186
char* DFG_OPERATION operationLinkConstruct(ExecState*) WTF_INTERNAL;
 
187
JSCell* DFG_OPERATION operationCreateActivation(ExecState*) WTF_INTERNAL;
 
188
JSCell* DFG_OPERATION operationCreateArguments(ExecState*) WTF_INTERNAL;
 
189
JSCell* DFG_OPERATION operationCreateInlinedArguments(ExecState*, InlineCallFrame*) WTF_INTERNAL;
 
190
void DFG_OPERATION operationTearOffArguments(ExecState*, JSCell*, JSCell*) WTF_INTERNAL;
 
191
void DFG_OPERATION operationTearOffInlinedArguments(ExecState*, JSCell*, JSCell*, InlineCallFrame*) WTF_INTERNAL;
 
192
EncodedJSValue DFG_OPERATION operationGetArgumentsLength(ExecState*, int32_t) WTF_INTERNAL;
 
193
EncodedJSValue DFG_OPERATION operationGetInlinedArgumentByVal(ExecState*, int32_t, InlineCallFrame*, int32_t) WTF_INTERNAL;
 
194
EncodedJSValue DFG_OPERATION operationGetArgumentByVal(ExecState*, int32_t, int32_t) WTF_INTERNAL;
 
195
JSCell* DFG_OPERATION operationNewFunction(ExecState*, JSCell*) WTF_INTERNAL;
 
196
JSCell* DFG_OPERATION operationNewFunctionExpression(ExecState*, JSCell*) WTF_INTERNAL;
 
197
double DFG_OPERATION operationFModOnInts(int32_t, int32_t) WTF_INTERNAL;
 
198
size_t DFG_OPERATION operationIsObject(ExecState*, EncodedJSValue) WTF_INTERNAL;
 
199
size_t DFG_OPERATION operationIsFunction(EncodedJSValue) WTF_INTERNAL;
 
200
void DFG_OPERATION operationReallocateStorageAndFinishPut(ExecState*, JSObject*, Structure*, PropertyOffset, EncodedJSValue) WTF_INTERNAL;
 
201
char* DFG_OPERATION operationAllocatePropertyStorageWithInitialCapacity(ExecState*) WTF_INTERNAL;
 
202
char* DFG_OPERATION operationAllocatePropertyStorage(ExecState*, size_t newSize) WTF_INTERNAL;
 
203
char* DFG_OPERATION operationReallocateButterflyToHavePropertyStorageWithInitialCapacity(ExecState*, JSObject*) WTF_INTERNAL;
 
204
char* DFG_OPERATION operationReallocateButterflyToGrowPropertyStorage(ExecState*, JSObject*, size_t newSize) WTF_INTERNAL;
 
205
char* DFG_OPERATION operationEnsureInt32(ExecState*, JSObject*);
 
206
char* DFG_OPERATION operationEnsureDouble(ExecState*, JSObject*);
 
207
char* DFG_OPERATION operationEnsureContiguous(ExecState*, JSObject*);
 
208
char* DFG_OPERATION operationEnsureArrayStorage(ExecState*, JSObject*);
 
209
 
 
210
// This method is used to lookup an exception hander, keyed by faultLocation, which is
 
211
// the return location from one of the calls out to one of the helper operations above.
 
212
 
 
213
// According to C++ rules, a type used for the return signature of function with C linkage (i.e.
 
214
// 'extern "C"') needs to be POD; hence putting any constructors into it could cause either compiler
 
215
// warnings, or worse, a change in the ABI used to return these types.
 
216
struct DFGHandler {
 
217
    union Union {
 
218
        struct Struct {
 
219
            ExecState* exec;
 
220
            void* handler;
 
221
        } s;
 
222
        uint64_t encoded;
 
223
    } u;
 
224
};
 
225
 
 
226
inline DFGHandler createDFGHandler(ExecState* exec, void* handler)
 
227
{
 
228
    DFGHandler result;
 
229
    result.u.s.exec = exec;
 
230
    result.u.s.handler = handler;
 
231
    return result;
 
232
}
 
233
 
 
234
#if CPU(X86_64)
 
235
typedef DFGHandler DFGHandlerEncoded;
 
236
inline DFGHandlerEncoded dfgHandlerEncoded(ExecState* exec, void* handler)
 
237
{
 
238
    return createDFGHandler(exec, handler);
 
239
}
 
240
#else
 
241
typedef uint64_t DFGHandlerEncoded;
 
242
inline DFGHandlerEncoded dfgHandlerEncoded(ExecState* exec, void* handler)
 
243
{
 
244
    COMPILE_ASSERT(sizeof(DFGHandler::Union) == sizeof(uint64_t), DFGHandler_Union_is_64bit);
 
245
    return createDFGHandler(exec, handler).u.encoded;
 
246
}
 
247
#endif
 
248
DFGHandlerEncoded DFG_OPERATION lookupExceptionHandler(ExecState*, uint32_t) WTF_INTERNAL;
 
249
DFGHandlerEncoded DFG_OPERATION lookupExceptionHandlerInStub(ExecState*, StructureStubInfo*) WTF_INTERNAL;
 
250
 
 
251
// These operations implement the implicitly called ToInt32, ToNumber, and ToBoolean conversions from ES5.
 
252
double DFG_OPERATION dfgConvertJSValueToNumber(ExecState*, EncodedJSValue) WTF_INTERNAL;
 
253
// This conversion returns an int32_t within a size_t such that the value is zero extended to fill the register.
 
254
size_t DFG_OPERATION dfgConvertJSValueToInt32(ExecState*, EncodedJSValue) WTF_INTERNAL;
 
255
size_t DFG_OPERATION dfgConvertJSValueToBoolean(ExecState*, EncodedJSValue) WTF_INTERNAL;
 
256
 
 
257
#if DFG_ENABLE(VERBOSE_SPECULATION_FAILURE)
 
258
void DFG_OPERATION debugOperationPrintSpeculationFailure(ExecState*, void*) WTF_INTERNAL;
 
259
#endif
 
260
 
 
261
void DFG_OPERATION triggerReoptimizationNow(CodeBlock*) WTF_INTERNAL;
 
262
 
 
263
} // extern "C"
 
264
} } // namespace JSC::DFG
 
265
 
 
266
#endif
 
267
#endif