444fd4b6080dd75d029fa95a17f3905b7bdee0f9
[WebKit-https.git] / 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: StringImpl*
59 */
60 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_E)(ExecState*);
61 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EA)(ExecState*, JSArray*);
62 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EAZ)(ExecState*, JSArray*, int32_t);
63 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EC)(ExecState*, JSCell*);
64 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_ECC)(ExecState*, JSCell*, JSCell*);
65 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_ECI)(ExecState*, JSCell*, StringImpl*);
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_EI)(ExecState*, StringImpl*);
69 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EJ)(ExecState*, EncodedJSValue);
70 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EJA)(ExecState*, EncodedJSValue, JSArray*);
71 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EJI)(ExecState*, EncodedJSValue, StringImpl*);
72 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EJJ)(ExecState*, EncodedJSValue, EncodedJSValue);
73 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EJssZ)(ExecState*, JSString*, int32_t);
74 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EJP)(ExecState*, EncodedJSValue, void*);
75 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EP)(ExecState*, void*);
76 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EPP)(ExecState*, void*, void*);
77 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EPS)(ExecState*, void*, size_t);
78 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_ESS)(ExecState*, size_t, size_t);
79 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EZ)(ExecState*, int32_t);
80 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EZIcfZ)(ExecState*, int32_t, InlineCallFrame*, int32_t);
81 typedef EncodedJSValue DFG_OPERATION (*J_DFGOperation_EZZ)(ExecState*, int32_t, int32_t);
82 typedef JSCell* DFG_OPERATION (*C_DFGOperation_E)(ExecState*);
83 typedef JSCell* DFG_OPERATION (*C_DFGOperation_EZ)(ExecState*, int32_t);
84 typedef JSCell* DFG_OPERATION (*C_DFGOperation_EC)(ExecState*, JSCell*);
85 typedef JSCell* DFG_OPERATION (*C_DFGOperation_ECC)(ExecState*, JSCell*, JSCell*);
86 typedef JSCell* DFG_OPERATION (*C_DFGOperation_EIcf)(ExecState*, InlineCallFrame*);
87 typedef JSCell* DFG_OPERATION (*C_DFGOperation_EJ)(ExecState*, EncodedJSValue);
88 typedef JSCell* DFG_OPERATION (*C_DFGOperation_EJssSt)(ExecState*, JSString*, Structure*);
89 typedef JSCell* DFG_OPERATION (*C_DFGOperation_EJssJss)(ExecState*, JSString*, JSString*);
90 typedef JSCell* DFG_OPERATION (*C_DFGOperation_EJssJssJss)(ExecState*, JSString*, JSString*, JSString*);
91 typedef JSCell* DFG_OPERATION (*C_DFGOperation_EOZ)(ExecState*, JSObject*, int32_t);
92 typedef JSCell* DFG_OPERATION (*C_DFGOperation_ESt)(ExecState*, Structure*);
93 typedef JSCell* DFG_OPERATION (*C_DFGOperation_EZ)(ExecState*, int32_t);
94 typedef double DFG_OPERATION (*D_DFGOperation_DD)(double, double);
95 typedef double DFG_OPERATION (*D_DFGOperation_ZZ)(int32_t, int32_t);
96 typedef double DFG_OPERATION (*D_DFGOperation_EJ)(ExecState*, EncodedJSValue);
97 typedef int32_t DFG_OPERATION (*Z_DFGOperation_D)(double);
98 typedef size_t DFG_OPERATION (*S_DFGOperation_ECC)(ExecState*, JSCell*, JSCell*);
99 typedef size_t DFG_OPERATION (*S_DFGOperation_EJ)(ExecState*, EncodedJSValue);
100 typedef size_t DFG_OPERATION (*S_DFGOperation_EJJ)(ExecState*, EncodedJSValue, EncodedJSValue);
101 typedef size_t DFG_OPERATION (*S_DFGOperation_J)(EncodedJSValue);
102 typedef void DFG_OPERATION (*V_DFGOperation_EOZD)(ExecState*, JSObject*, int32_t, double);
103 typedef void DFG_OPERATION (*V_DFGOperation_EOZJ)(ExecState*, JSObject*, int32_t, EncodedJSValue);
104 typedef void DFG_OPERATION (*V_DFGOperation_EC)(ExecState*, JSCell*);
105 typedef void DFG_OPERATION (*V_DFGOperation_ECIcf)(ExecState*, JSCell*, InlineCallFrame*);
106 typedef void DFG_OPERATION (*V_DFGOperation_ECCIcf)(ExecState*, JSCell*, JSCell*, InlineCallFrame*);
107 typedef void DFG_OPERATION (*V_DFGOperation_ECJJ)(ExecState*, JSCell*, EncodedJSValue, EncodedJSValue);
108 typedef void DFG_OPERATION (*V_DFGOperation_ECZ)(ExecState*, JSCell*, int32_t);
109 typedef void DFG_OPERATION (*V_DFGOperation_ECC)(ExecState*, JSCell*, JSCell*);
110 typedef void DFG_OPERATION (*V_DFGOperation_EJCI)(ExecState*, EncodedJSValue, JSCell*, StringImpl*);
111 typedef void DFG_OPERATION (*V_DFGOperation_EJJJ)(ExecState*, EncodedJSValue, EncodedJSValue, EncodedJSValue);
112 typedef void DFG_OPERATION (*V_DFGOperation_EJPP)(ExecState*, EncodedJSValue, void*, void*);
113 typedef void DFG_OPERATION (*V_DFGOperation_EPZJ)(ExecState*, void*, int32_t, EncodedJSValue);
114 typedef void DFG_OPERATION (*V_DFGOperation_W)(WatchpointSet*);
115 typedef char* DFG_OPERATION (*P_DFGOperation_E)(ExecState*);
116 typedef char* DFG_OPERATION (*P_DFGOperation_EC)(ExecState*, JSCell*);
117 typedef char* DFG_OPERATION (*P_DFGOperation_EJS)(ExecState*, EncodedJSValue, size_t);
118 typedef char* DFG_OPERATION (*P_DFGOperation_EO)(ExecState*, JSObject*);
119 typedef char* DFG_OPERATION (*P_DFGOperation_EOS)(ExecState*, JSObject*, size_t);
120 typedef char* DFG_OPERATION (*P_DFGOperation_EOZ)(ExecState*, JSObject*, int32_t);
121 typedef char* DFG_OPERATION (*P_DFGOperation_EPS)(ExecState*, void*, size_t);
122 typedef char* DFG_OPERATION (*P_DFGOperation_ES)(ExecState*, size_t);
123 typedef char* DFG_OPERATION (*P_DFGOperation_ESJss)(ExecState*, size_t, JSString*);
124 typedef char* DFG_OPERATION (*P_DFGOperation_ESt)(ExecState*, Structure*);
125 typedef char* DFG_OPERATION (*P_DFGOperation_EStPS)(ExecState*, Structure*, void*, size_t);
126 typedef char* DFG_OPERATION (*P_DFGOperation_EStSS)(ExecState*, Structure*, size_t, size_t);
127 typedef char* DFG_OPERATION (*P_DFGOperation_EStZ)(ExecState*, Structure*, int32_t);
128 typedef StringImpl* DFG_OPERATION (*I_DFGOperation_EJss)(ExecState*, JSString*);
129 typedef JSString* DFG_OPERATION (*Jss_DFGOperation_EZ)(ExecState*, int32_t);
130 JSCell* DFG_OPERATION operationStringFromCharCode(ExecState*, int32_t)  WTF_INTERNAL; 
131
132 // These routines are provide callbacks out to C++ implementations of operations too complex to JIT.
133 JSCell* DFG_OPERATION operationNewObject(ExecState*, Structure*) WTF_INTERNAL;
134 JSCell* DFG_OPERATION operationCreateThis(ExecState*, JSObject* constructor, int32_t inlineCapacity) WTF_INTERNAL;
135 EncodedJSValue DFG_OPERATION operationToThis(ExecState*, EncodedJSValue encodedOp1) WTF_INTERNAL;
136 EncodedJSValue DFG_OPERATION operationValueAdd(ExecState*, EncodedJSValue encodedOp1, EncodedJSValue encodedOp2) WTF_INTERNAL;
137 EncodedJSValue DFG_OPERATION operationValueAddNotNumber(ExecState*, EncodedJSValue encodedOp1, EncodedJSValue encodedOp2) WTF_INTERNAL;
138 EncodedJSValue DFG_OPERATION operationGetByVal(ExecState*, EncodedJSValue encodedBase, EncodedJSValue encodedProperty) WTF_INTERNAL;
139 EncodedJSValue DFG_OPERATION operationGetByValCell(ExecState*, JSCell*, EncodedJSValue encodedProperty) WTF_INTERNAL;
140 EncodedJSValue DFG_OPERATION operationGetByValArrayInt(ExecState*, JSArray*, int32_t) WTF_INTERNAL;
141 EncodedJSValue DFG_OPERATION operationGetByValStringInt(ExecState*, JSString*, int32_t) WTF_INTERNAL;
142 EncodedJSValue DFG_OPERATION operationGetById(ExecState*, EncodedJSValue, StringImpl*) WTF_INTERNAL;
143 EncodedJSValue DFG_OPERATION operationGetByIdBuildList(ExecState*, EncodedJSValue, StringImpl*) WTF_INTERNAL;
144 EncodedJSValue DFG_OPERATION operationGetByIdOptimize(ExecState*, EncodedJSValue, StringImpl*) WTF_INTERNAL;
145 EncodedJSValue DFG_OPERATION operationInOptimize(ExecState*, JSCell*, StringImpl*);
146 EncodedJSValue DFG_OPERATION operationIn(ExecState*, JSCell*, StringImpl*);
147 EncodedJSValue DFG_OPERATION operationGenericIn(ExecState*, JSCell*, EncodedJSValue);
148 EncodedJSValue DFG_OPERATION operationCallCustomGetter(ExecState*, JSCell*, PropertySlot::GetValueFunc, StringImpl*) WTF_INTERNAL;
149 EncodedJSValue DFG_OPERATION operationCallGetter(ExecState*, JSCell*, JSCell*) WTF_INTERNAL;
150 EncodedJSValue DFG_OPERATION operationToPrimitive(ExecState*, EncodedJSValue) WTF_INTERNAL;
151 char* DFG_OPERATION operationNewArray(ExecState*, Structure*, void*, size_t) WTF_INTERNAL;
152 char* DFG_OPERATION operationNewArrayBuffer(ExecState*, Structure*, size_t, size_t) WTF_INTERNAL;
153 char* DFG_OPERATION operationNewEmptyArray(ExecState*, Structure*) WTF_INTERNAL;
154 char* DFG_OPERATION operationNewArrayWithSize(ExecState*, Structure*, int32_t) WTF_INTERNAL;
155 EncodedJSValue DFG_OPERATION operationNewRegexp(ExecState*, void*) WTF_INTERNAL;
156 void DFG_OPERATION operationPutByValStrict(ExecState*, EncodedJSValue encodedBase, EncodedJSValue encodedProperty, EncodedJSValue encodedValue) WTF_INTERNAL;
157 void DFG_OPERATION operationPutByValNonStrict(ExecState*, EncodedJSValue encodedBase, EncodedJSValue encodedProperty, EncodedJSValue encodedValue) WTF_INTERNAL;
158 void DFG_OPERATION operationPutByValCellStrict(ExecState*, JSCell*, EncodedJSValue encodedProperty, EncodedJSValue encodedValue) WTF_INTERNAL;
159 void DFG_OPERATION operationPutByValCellNonStrict(ExecState*, JSCell*, EncodedJSValue encodedProperty, EncodedJSValue encodedValue) WTF_INTERNAL;
160 void DFG_OPERATION operationPutByValBeyondArrayBoundsStrict(ExecState*, JSObject*, int32_t index, EncodedJSValue encodedValue) WTF_INTERNAL;
161 void DFG_OPERATION operationPutByValBeyondArrayBoundsNonStrict(ExecState*, JSObject*, int32_t index, EncodedJSValue encodedValue) WTF_INTERNAL;
162 void DFG_OPERATION operationPutDoubleByValBeyondArrayBoundsStrict(ExecState*, JSObject*, int32_t index, double value) WTF_INTERNAL;
163 void DFG_OPERATION operationPutDoubleByValBeyondArrayBoundsNonStrict(ExecState*, JSObject*, int32_t index, double value) WTF_INTERNAL;
164 EncodedJSValue DFG_OPERATION operationArrayPush(ExecState*, EncodedJSValue encodedValue, JSArray*) WTF_INTERNAL;
165 EncodedJSValue DFG_OPERATION operationArrayPushDouble(ExecState*, double value, JSArray*) WTF_INTERNAL;
166 EncodedJSValue DFG_OPERATION operationArrayPop(ExecState*, JSArray*) WTF_INTERNAL;
167 EncodedJSValue DFG_OPERATION operationArrayPopAndRecoverLength(ExecState*, JSArray*) WTF_INTERNAL;
168 EncodedJSValue DFG_OPERATION operationRegExpExec(ExecState*, JSCell*, JSCell*) WTF_INTERNAL;
169 void DFG_OPERATION operationPutByIdStrict(ExecState*, EncodedJSValue encodedValue, JSCell* base, StringImpl*) WTF_INTERNAL;
170 void DFG_OPERATION operationPutByIdNonStrict(ExecState*, EncodedJSValue encodedValue, JSCell* base, StringImpl*) WTF_INTERNAL;
171 void DFG_OPERATION operationPutByIdDirectStrict(ExecState*, EncodedJSValue encodedValue, JSCell* base, StringImpl*) WTF_INTERNAL;
172 void DFG_OPERATION operationPutByIdDirectNonStrict(ExecState*, EncodedJSValue encodedValue, JSCell* base, StringImpl*) WTF_INTERNAL;
173 void DFG_OPERATION operationPutByIdStrictOptimize(ExecState*, EncodedJSValue encodedValue, JSCell* base, StringImpl*) WTF_INTERNAL;
174 void DFG_OPERATION operationPutByIdNonStrictOptimize(ExecState*, EncodedJSValue encodedValue, JSCell* base, StringImpl*) WTF_INTERNAL;
175 void DFG_OPERATION operationPutByIdDirectStrictOptimize(ExecState*, EncodedJSValue encodedValue, JSCell* base, StringImpl*) WTF_INTERNAL;
176 void DFG_OPERATION operationPutByIdDirectNonStrictOptimize(ExecState*, EncodedJSValue encodedValue, JSCell* base, StringImpl*) WTF_INTERNAL;
177 void DFG_OPERATION operationPutByIdStrictBuildList(ExecState*, EncodedJSValue encodedValue, JSCell* base, StringImpl*) WTF_INTERNAL;
178 void DFG_OPERATION operationPutByIdNonStrictBuildList(ExecState*, EncodedJSValue encodedValue, JSCell* base, StringImpl*) WTF_INTERNAL;
179 void DFG_OPERATION operationPutByIdDirectStrictBuildList(ExecState*, EncodedJSValue encodedValue, JSCell* base, StringImpl*) WTF_INTERNAL;
180 void DFG_OPERATION operationPutByIdDirectNonStrictBuildList(ExecState*, EncodedJSValue encodedValue, JSCell* base, StringImpl*) WTF_INTERNAL;
181 // These comparisons return a boolean within a size_t such that the value is zero extended to fill the register.
182 size_t DFG_OPERATION operationRegExpTest(ExecState*, JSCell*, JSCell*) WTF_INTERNAL;
183 size_t DFG_OPERATION operationCompareLess(ExecState*, EncodedJSValue encodedOp1, EncodedJSValue encodedOp2) WTF_INTERNAL;
184 size_t DFG_OPERATION operationCompareLessEq(ExecState*, EncodedJSValue encodedOp1, EncodedJSValue encodedOp2) WTF_INTERNAL;
185 size_t DFG_OPERATION operationCompareGreater(ExecState*, EncodedJSValue encodedOp1, EncodedJSValue encodedOp2) WTF_INTERNAL;
186 size_t DFG_OPERATION operationCompareGreaterEq(ExecState*, EncodedJSValue encodedOp1, EncodedJSValue encodedOp2) WTF_INTERNAL;
187 size_t DFG_OPERATION operationCompareEq(ExecState*, EncodedJSValue encodedOp1, EncodedJSValue encodedOp2) WTF_INTERNAL;
188 #if USE(JSVALUE64)
189 EncodedJSValue DFG_OPERATION operationCompareStringEq(ExecState*, JSCell* left, JSCell* right) WTF_INTERNAL;
190 #else
191 size_t DFG_OPERATION operationCompareStringEq(ExecState*, JSCell* left, JSCell* right) WTF_INTERNAL;
192 #endif
193 size_t DFG_OPERATION operationCompareStrictEqCell(ExecState*, EncodedJSValue encodedOp1, EncodedJSValue encodedOp2) WTF_INTERNAL;
194 size_t DFG_OPERATION operationCompareStrictEq(ExecState*, EncodedJSValue encodedOp1, EncodedJSValue encodedOp2) WTF_INTERNAL;
195 char* DFG_OPERATION operationVirtualCall(ExecState*) WTF_INTERNAL;
196 char* DFG_OPERATION operationLinkCall(ExecState*) WTF_INTERNAL;
197 char* DFG_OPERATION operationLinkClosureCall(ExecState*) WTF_INTERNAL;
198 char* DFG_OPERATION operationVirtualConstruct(ExecState*) WTF_INTERNAL;
199 char* DFG_OPERATION operationLinkConstruct(ExecState*) WTF_INTERNAL;
200 JSCell* DFG_OPERATION operationCreateActivation(ExecState*) WTF_INTERNAL;
201 JSCell* DFG_OPERATION operationCreateArguments(ExecState*) WTF_INTERNAL;
202 JSCell* DFG_OPERATION operationCreateInlinedArguments(ExecState*, InlineCallFrame*) WTF_INTERNAL;
203 void DFG_OPERATION operationTearOffArguments(ExecState*, JSCell*, JSCell*) WTF_INTERNAL;
204 void DFG_OPERATION operationTearOffInlinedArguments(ExecState*, JSCell*, JSCell*, InlineCallFrame*) WTF_INTERNAL;
205 EncodedJSValue DFG_OPERATION operationGetArgumentsLength(ExecState*, int32_t) WTF_INTERNAL;
206 EncodedJSValue DFG_OPERATION operationGetInlinedArgumentByVal(ExecState*, int32_t, InlineCallFrame*, int32_t) WTF_INTERNAL;
207 EncodedJSValue DFG_OPERATION operationGetArgumentByVal(ExecState*, int32_t, int32_t) WTF_INTERNAL;
208 JSCell* DFG_OPERATION operationNewFunctionNoCheck(ExecState*, JSCell*) WTF_INTERNAL;
209 EncodedJSValue DFG_OPERATION operationNewFunction(ExecState*, JSCell*) WTF_INTERNAL;
210 JSCell* DFG_OPERATION operationNewFunctionExpression(ExecState*, JSCell*) WTF_INTERNAL;
211 double DFG_OPERATION operationFModOnInts(int32_t, int32_t) WTF_INTERNAL;
212 size_t DFG_OPERATION operationIsObject(ExecState*, EncodedJSValue) WTF_INTERNAL;
213 size_t DFG_OPERATION operationIsFunction(EncodedJSValue) WTF_INTERNAL;
214 JSCell* DFG_OPERATION operationTypeOf(ExecState*, JSCell*) WTF_INTERNAL;
215 void DFG_OPERATION operationReallocateStorageAndFinishPut(ExecState*, JSObject*, Structure*, PropertyOffset, EncodedJSValue) WTF_INTERNAL;
216 char* DFG_OPERATION operationAllocatePropertyStorageWithInitialCapacity(ExecState*) WTF_INTERNAL;
217 char* DFG_OPERATION operationAllocatePropertyStorage(ExecState*, size_t newSize) WTF_INTERNAL;
218 char* DFG_OPERATION operationReallocateButterflyToHavePropertyStorageWithInitialCapacity(ExecState*, JSObject*) WTF_INTERNAL;
219 char* DFG_OPERATION operationReallocateButterflyToGrowPropertyStorage(ExecState*, JSObject*, size_t newSize) WTF_INTERNAL;
220 char* DFG_OPERATION operationEnsureInt32(ExecState*, JSCell*);
221 char* DFG_OPERATION operationEnsureDouble(ExecState*, JSCell*);
222 char* DFG_OPERATION operationEnsureContiguous(ExecState*, JSCell*);
223 char* DFG_OPERATION operationRageEnsureContiguous(ExecState*, JSCell*);
224 char* DFG_OPERATION operationEnsureArrayStorage(ExecState*, JSCell*);
225 StringImpl* DFG_OPERATION operationResolveRope(ExecState*, JSString*);
226 JSString* DFG_OPERATION operationSingleCharacterString(ExecState*, int32_t);
227
228 JSCell* DFG_OPERATION operationNewStringObject(ExecState*, JSString*, Structure*);
229 JSCell* DFG_OPERATION operationToStringOnCell(ExecState*, JSCell*);
230 JSCell* DFG_OPERATION operationToString(ExecState*, EncodedJSValue);
231 JSCell* DFG_OPERATION operationMakeRope2(ExecState*, JSString*, JSString*);
232 JSCell* DFG_OPERATION operationMakeRope3(ExecState*, JSString*, JSString*, JSString*);
233 char* DFG_OPERATION operationFindSwitchImmTargetForDouble(ExecState*, EncodedJSValue, size_t tableIndex);
234 char* DFG_OPERATION operationSwitchString(ExecState*, size_t tableIndex, JSString*);
235
236 // This method is used to lookup an exception hander, keyed by faultLocation, which is
237 // the return location from one of the calls out to one of the helper operations above.
238
239 // According to C++ rules, a type used for the return signature of function with C linkage (i.e.
240 // 'extern "C"') needs to be POD; hence putting any constructors into it could cause either compiler
241 // warnings, or worse, a change in the ABI used to return these types.
242 struct DFGHandler {
243     union Union {
244         struct Struct {
245             ExecState* exec;
246             void* handler;
247         } s;
248         uint64_t encoded;
249     } u;
250 };
251
252 inline DFGHandler createDFGHandler(ExecState* exec, void* handler)
253 {
254     DFGHandler result;
255     result.u.s.exec = exec;
256     result.u.s.handler = handler;
257     return result;
258 }
259
260 #if CPU(X86_64)
261 typedef DFGHandler DFGHandlerEncoded;
262 inline DFGHandlerEncoded dfgHandlerEncoded(ExecState* exec, void* handler)
263 {
264     return createDFGHandler(exec, handler);
265 }
266 #else
267 typedef uint64_t DFGHandlerEncoded;
268 inline DFGHandlerEncoded dfgHandlerEncoded(ExecState* exec, void* handler)
269 {
270     COMPILE_ASSERT(sizeof(DFGHandler::Union) == sizeof(uint64_t), DFGHandler_Union_is_64bit);
271     return createDFGHandler(exec, handler).u.encoded;
272 }
273 #endif
274 DFGHandlerEncoded DFG_OPERATION lookupExceptionHandler(ExecState*, uint32_t) WTF_INTERNAL;
275 DFGHandlerEncoded DFG_OPERATION lookupExceptionHandlerInStub(ExecState*, StructureStubInfo*) WTF_INTERNAL;
276
277 // These operations implement the implicitly called ToInt32 and ToBoolean conversions from ES5.
278 // This conversion returns an int32_t within a size_t such that the value is zero extended to fill the register.
279 size_t DFG_OPERATION dfgConvertJSValueToInt32(ExecState*, EncodedJSValue) WTF_INTERNAL;
280 size_t DFG_OPERATION dfgConvertJSValueToBoolean(ExecState*, EncodedJSValue) WTF_INTERNAL;
281
282 void DFG_OPERATION debugOperationPrintSpeculationFailure(ExecState*, void*, void*) WTF_INTERNAL;
283
284 void DFG_OPERATION triggerReoptimizationNow(CodeBlock*) WTF_INTERNAL;
285
286 } // extern "C"
287 } } // namespace JSC::DFG
288
289 #endif
290 #endif