1// Copyright (C) 2016 The Qt Company Ltd.
2// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
3
4#ifndef QV4INSTR_MOTH_P_H
5#define QV4INSTR_MOTH_P_H
6
7//
8// W A R N I N G
9// -------------
10//
11// This file is not part of the Qt API. It exists purely as an
12// implementation detail. This header file may change from version to
13// version without notice, or even be removed.
14//
15// We mean it.
16//
17
18#include <private/qv4staticvalue_p.h>
19#include <private/qv4compileddata_p.h> // for CompiledData::CodeOffsetToLine used by the dumper
20#include <qendian.h>
21
22QT_BEGIN_NAMESPACE
23
24#define INSTRUCTION(op, name, nargs, ...) \
25 op##_INSTRUCTION(name, nargs, __VA_ARGS__)
26
27/* for all jump instructions, the offset has to come last, to simplify the job of the bytecode generator */
28#define INSTR_Nop(op) INSTRUCTION(op, Nop, 0)
29#define INSTR_Ret(op) INSTRUCTION(op, Ret, 0)
30#define INSTR_Debug(op) INSTRUCTION(op, Debug, 0)
31#define INSTR_LoadConst(op) INSTRUCTION(op, LoadConst, 1, index)
32#define INSTR_LoadZero(op) INSTRUCTION(op, LoadZero, 0)
33#define INSTR_LoadTrue(op) INSTRUCTION(op, LoadTrue, 0)
34#define INSTR_LoadFalse(op) INSTRUCTION(op, LoadFalse, 0)
35#define INSTR_LoadNull(op) INSTRUCTION(op, LoadNull, 0)
36#define INSTR_LoadUndefined(op) INSTRUCTION(op, LoadUndefined, 0)
37#define INSTR_LoadInt(op) INSTRUCTION(op, LoadInt, 1, value)
38#define INSTR_MoveConst(op) INSTRUCTION(op, MoveConst, 2, constIndex, destTemp)
39#define INSTR_LoadReg(op) INSTRUCTION(op, LoadReg, 1, reg)
40#define INSTR_StoreReg(op) INSTRUCTION(op, StoreReg, 1, reg)
41#define INSTR_MoveReg(op) INSTRUCTION(op, MoveReg, 2, srcReg, destReg)
42#define INSTR_LoadImport(op) INSTRUCTION(op, LoadImport, 1, index)
43#define INSTR_LoadLocal(op) INSTRUCTION(op, LoadLocal, 1, index)
44#define INSTR_StoreLocal(op) INSTRUCTION(op, StoreLocal, 1, index)
45#define INSTR_LoadScopedLocal(op) INSTRUCTION(op, LoadScopedLocal, 2, scope, index)
46#define INSTR_StoreScopedLocal(op) INSTRUCTION(op, StoreScopedLocal, 2, scope, index)
47#define INSTR_LoadRuntimeString(op) INSTRUCTION(op, LoadRuntimeString, 1, stringId)
48#define INSTR_MoveRegExp(op) INSTRUCTION(op, MoveRegExp, 2, regExpId, destReg)
49#define INSTR_LoadClosure(op) INSTRUCTION(op, LoadClosure, 1, value)
50#define INSTR_LoadName(op) INSTRUCTION(op, LoadName, 1, name)
51#define INSTR_LoadGlobalLookup(op) INSTRUCTION(op, LoadGlobalLookup, 1, index)
52#define INSTR_LoadQmlContextPropertyLookup(op) INSTRUCTION(op, LoadQmlContextPropertyLookup, 1, index)
53#define INSTR_StoreNameSloppy(op) INSTRUCTION(op, StoreNameSloppy, 1, name)
54#define INSTR_StoreNameStrict(op) INSTRUCTION(op, StoreNameStrict, 1, name)
55#define INSTR_LoadProperty(op) INSTRUCTION(op, LoadProperty, 1, name)
56#define INSTR_LoadOptionalProperty(op) INSTRUCTION(op, LoadOptionalProperty, 2, name, offset)
57#define INSTR_GetLookup(op) INSTRUCTION(op, GetLookup, 1, index)
58#define INSTR_GetOptionalLookup(op) INSTRUCTION(op, GetOptionalLookup, 2, index, offset)
59#define INSTR_LoadIdObject(op) INSTRUCTION(op, LoadIdObject, 2, index, base)
60#define INSTR_Yield(op) INSTRUCTION(op, Yield, 0)
61#define INSTR_YieldStar(op) INSTRUCTION(op, YieldStar, 0)
62#define INSTR_Resume(op) INSTRUCTION(op, Resume, 1, offset)
63#define INSTR_IteratorNextForYieldStar(op) INSTRUCTION(op, IteratorNextForYieldStar, 3, iterator, object, offset)
64#define INSTR_StoreProperty(op) INSTRUCTION(op, StoreProperty, 2, name, base)
65#define INSTR_SetLookup(op) INSTRUCTION(op, SetLookup, 2, index, base)
66#define INSTR_LoadSuperProperty(op) INSTRUCTION(op, LoadSuperProperty, 1, property)
67#define INSTR_StoreSuperProperty(op) INSTRUCTION(op, StoreSuperProperty, 1, property)
68#define INSTR_LoadElement(op) INSTRUCTION(op, LoadElement, 1, base)
69#define INSTR_StoreElement(op) INSTRUCTION(op, StoreElement, 2, base, index)
70#define INSTR_CallValue(op) INSTRUCTION(op, CallValue, 3, name, argc, argv)
71#define INSTR_CallWithReceiver(op) INSTRUCTION(op, CallWithReceiver, 4, name, thisObject, argc, argv)
72#define INSTR_CallProperty(op) INSTRUCTION(op, CallProperty, 4, name, base, argc, argv)
73#define INSTR_CallPropertyLookup(op) INSTRUCTION(op, CallPropertyLookup, 4, lookupIndex, base, argc, argv)
74#define INSTR_CallName(op) INSTRUCTION(op, CallName, 3, name, argc, argv)
75#define INSTR_CallPossiblyDirectEval(op) INSTRUCTION(op, CallPossiblyDirectEval, 2, argc, argv)
76#define INSTR_CallGlobalLookup(op) INSTRUCTION(op, CallGlobalLookup, 3, index, argc, argv)
77#define INSTR_CallQmlContextPropertyLookup(op) INSTRUCTION(op, CallQmlContextPropertyLookup, 3, index, argc, argv)
78#define INSTR_CallWithSpread(op) INSTRUCTION(op, CallWithSpread, 4, func, thisObject, argc, argv)
79#define INSTR_Construct(op) INSTRUCTION(op, Construct, 3, func, argc, argv)
80#define INSTR_ConstructWithSpread(op) INSTRUCTION(op, ConstructWithSpread, 3, func, argc, argv)
81#define INSTR_SetUnwindHandler(op) INSTRUCTION(op, SetUnwindHandler, 1, offset)
82#define INSTR_UnwindDispatch(op) INSTRUCTION(op, UnwindDispatch, 0)
83#define INSTR_UnwindToLabel(op) INSTRUCTION(op, UnwindToLabel, 2, level, offset)
84#define INSTR_DeadTemporalZoneCheck(op) INSTRUCTION(op, DeadTemporalZoneCheck, 1, name)
85#define INSTR_ThrowException(op) INSTRUCTION(op, ThrowException, 0)
86#define INSTR_GetException(op) INSTRUCTION(op, GetException, 0)
87#define INSTR_SetException(op) INSTRUCTION(op, SetException, 0)
88#define INSTR_CreateCallContext(op) INSTRUCTION(op, CreateCallContext, 0)
89#define INSTR_PushCatchContext(op) INSTRUCTION(op, PushCatchContext, 2, index, name)
90#define INSTR_PushWithContext(op) INSTRUCTION(op, PushWithContext, 0)
91#define INSTR_PushBlockContext(op) INSTRUCTION(op, PushBlockContext, 1, index)
92#define INSTR_CloneBlockContext(op) INSTRUCTION(op, CloneBlockContext, 0)
93#define INSTR_PushScriptContext(op) INSTRUCTION(op, PushScriptContext, 1, index)
94#define INSTR_PopScriptContext(op) INSTRUCTION(op, PopScriptContext, 0)
95#define INSTR_PopContext(op) INSTRUCTION(op, PopContext, 0)
96#define INSTR_GetIterator(op) INSTRUCTION(op, GetIterator, 1, iterator)
97#define INSTR_IteratorNext(op) INSTRUCTION(op, IteratorNext, 2, value, offset)
98#define INSTR_IteratorClose(op) INSTRUCTION(op, IteratorClose, 0)
99#define INSTR_DestructureRestElement(op) INSTRUCTION(op, DestructureRestElement, 0)
100#define INSTR_DeleteProperty(op) INSTRUCTION(op, DeleteProperty, 2, base, index)
101#define INSTR_DeleteName(op) INSTRUCTION(op, DeleteName, 1, name)
102#define INSTR_TypeofName(op) INSTRUCTION(op, TypeofName, 1, name)
103#define INSTR_TypeofValue(op) INSTRUCTION(op, TypeofValue, 0)
104#define INSTR_DeclareVar(op) INSTRUCTION(op, DeclareVar, 2, varName, isDeletable)
105#define INSTR_DefineArray(op) INSTRUCTION(op, DefineArray, 2, argc, args)
106#define INSTR_DefineObjectLiteral(op) INSTRUCTION(op, DefineObjectLiteral, 3, internalClassId, argc, args)
107#define INSTR_CreateClass(op) INSTRUCTION(op, CreateClass, 3, classIndex, heritage, computedNames)
108#define INSTR_CreateMappedArgumentsObject(op) INSTRUCTION(op, CreateMappedArgumentsObject, 0)
109#define INSTR_CreateUnmappedArgumentsObject(op) INSTRUCTION(op, CreateUnmappedArgumentsObject, 0)
110#define INSTR_CreateRestParameter(op) INSTRUCTION(op, CreateRestParameter, 1, argIndex)
111#define INSTR_ConvertThisToObject(op) INSTRUCTION(op, ConvertThisToObject, 0)
112#define INSTR_LoadSuperConstructor(op) INSTRUCTION(op, LoadSuperConstructor, 0)
113#define INSTR_ToObject(op) INSTRUCTION(op, ToObject, 0)
114#define INSTR_Jump(op) INSTRUCTION(op, Jump, 1, offset)
115#define INSTR_JumpTrue(op) INSTRUCTION(op, JumpTrue, 1, offset)
116#define INSTR_JumpFalse(op) INSTRUCTION(op, JumpFalse, 1, offset)
117#define INSTR_JumpNotUndefined(op) INSTRUCTION(op, JumpNotUndefined, 1, offset)
118#define INSTR_JumpNoException(op) INSTRUCTION(op, JumpNoException, 1, offset)
119#define INSTR_CheckException(op) INSTRUCTION(op, CheckException, 0)
120#define INSTR_CmpEqNull(op) INSTRUCTION(op, CmpEqNull, 0)
121#define INSTR_CmpNeNull(op) INSTRUCTION(op, CmpNeNull, 0)
122#define INSTR_CmpEqInt(op) INSTRUCTION(op, CmpEqInt, 1, lhs)
123#define INSTR_CmpNeInt(op) INSTRUCTION(op, CmpNeInt, 1, lhs)
124#define INSTR_CmpEq(op) INSTRUCTION(op, CmpEq, 1, lhs)
125#define INSTR_CmpNe(op) INSTRUCTION(op, CmpNe, 1, lhs)
126#define INSTR_CmpGt(op) INSTRUCTION(op, CmpGt, 1, lhs)
127#define INSTR_CmpGe(op) INSTRUCTION(op, CmpGe, 1, lhs)
128#define INSTR_CmpLt(op) INSTRUCTION(op, CmpLt, 1, lhs)
129#define INSTR_CmpLe(op) INSTRUCTION(op, CmpLe, 1, lhs)
130#define INSTR_CmpStrictEqual(op) INSTRUCTION(op, CmpStrictEqual, 1, lhs)
131#define INSTR_CmpStrictNotEqual(op) INSTRUCTION(op, CmpStrictNotEqual, 1, lhs)
132#define INSTR_CmpIn(op) INSTRUCTION(op, CmpIn, 1, lhs)
133#define INSTR_CmpInstanceOf(op) INSTRUCTION(op, CmpInstanceOf, 1, lhs)
134#define INSTR_UNot(op) INSTRUCTION(op, UNot, 0)
135#define INSTR_UPlus(op) INSTRUCTION(op, UPlus, 0)
136#define INSTR_UMinus(op) INSTRUCTION(op, UMinus, 0)
137#define INSTR_UCompl(op) INSTRUCTION(op, UCompl, 0)
138#define INSTR_Increment(op) INSTRUCTION(op, Increment, 0)
139#define INSTR_Decrement(op) INSTRUCTION(op, Decrement, 0)
140#define INSTR_Add(op) INSTRUCTION(op, Add, 1, lhs)
141#define INSTR_BitAnd(op) INSTRUCTION(op, BitAnd, 1, lhs)
142#define INSTR_BitOr(op) INSTRUCTION(op, BitOr, 1, lhs)
143#define INSTR_BitXor(op) INSTRUCTION(op, BitXor, 1, lhs)
144#define INSTR_UShr(op) INSTRUCTION(op, UShr, 1, lhs)
145#define INSTR_Shr(op) INSTRUCTION(op, Shr, 1, lhs)
146#define INSTR_Shl(op) INSTRUCTION(op, Shl, 1, lhs)
147#define INSTR_BitAndConst(op) INSTRUCTION(op, BitAndConst, 1, rhs)
148#define INSTR_BitOrConst(op) INSTRUCTION(op, BitOrConst, 1, rhs)
149#define INSTR_BitXorConst(op) INSTRUCTION(op, BitXorConst, 1, rhs)
150#define INSTR_UShrConst(op) INSTRUCTION(op, UShrConst, 1, rhs)
151#define INSTR_ShrConst(op) INSTRUCTION(op, ShrConst, 1, rhs)
152#define INSTR_ShlConst(op) INSTRUCTION(op, ShlConst, 1, rhs)
153#define INSTR_Exp(op) INSTRUCTION(op, Exp, 1, lhs)
154#define INSTR_Mul(op) INSTRUCTION(op, Mul, 1, lhs)
155#define INSTR_Div(op) INSTRUCTION(op, Div, 1, lhs)
156#define INSTR_Mod(op) INSTRUCTION(op, Mod, 1, lhs)
157#define INSTR_Sub(op) INSTRUCTION(op, Sub, 1, lhs)
158#define INSTR_As(op) INSTRUCTION(op, As, 1, lhs)
159#define INSTR_LoadQmlImportedScripts(op) INSTRUCTION(op, LoadQmlImportedScripts, 1, result)
160#define INSTR_InitializeBlockDeadTemporalZone(op) INSTRUCTION(op, InitializeBlockDeadTemporalZone, 2, firstReg, count)
161#define INSTR_ThrowOnNullOrUndefined(op) INSTRUCTION(op, ThrowOnNullOrUndefined, 0)
162#define INSTR_GetTemplateObject(op) INSTRUCTION(op, GetTemplateObject, 1, index)
163#define INSTR_TailCall(op) INSTRUCTION(op, TailCall, 4, func, thisObject, argc, argv)
164
165#define FOR_EACH_MOTH_INSTR_ALL(F) \
166 F(Nop) \
167 FOR_EACH_MOTH_INSTR(F)
168
169#define FOR_EACH_MOTH_INSTR(F) \
170 F(Ret) \
171 F(LoadConst) \
172 F(LoadZero) \
173 F(LoadTrue) \
174 F(LoadFalse) \
175 F(LoadNull) \
176 F(LoadUndefined) \
177 F(LoadInt) \
178 F(LoadRuntimeString) \
179 F(MoveConst) \
180 F(LoadReg) \
181 F(StoreReg) \
182 F(MoveReg) \
183 F(LoadImport) \
184 F(LoadLocal) \
185 F(StoreLocal) \
186 F(LoadScopedLocal) \
187 F(StoreScopedLocal) \
188 F(MoveRegExp) \
189 F(LoadClosure) \
190 F(LoadName) \
191 F(LoadGlobalLookup) \
192 F(LoadQmlContextPropertyLookup) \
193 F(StoreNameSloppy) \
194 F(StoreNameStrict) \
195 F(LoadElement) \
196 F(StoreElement) \
197 F(LoadProperty) \
198 F(LoadOptionalProperty) \
199 F(GetLookup) \
200 F(GetOptionalLookup) \
201 F(StoreProperty) \
202 F(SetLookup) \
203 F(LoadSuperProperty) \
204 F(StoreSuperProperty) \
205 F(ConvertThisToObject) \
206 F(ToObject) \
207 F(Jump) \
208 F(JumpTrue) \
209 F(JumpFalse) \
210 F(JumpNoException) \
211 F(JumpNotUndefined) \
212 F(CheckException) \
213 F(CmpEqNull) \
214 F(CmpNeNull) \
215 F(CmpEqInt) \
216 F(CmpNeInt) \
217 F(CmpEq) \
218 F(CmpNe) \
219 F(CmpGt) \
220 F(CmpGe) \
221 F(CmpLt) \
222 F(CmpLe) \
223 F(CmpStrictEqual) \
224 F(CmpStrictNotEqual) \
225 F(CmpIn) \
226 F(CmpInstanceOf) \
227 F(UNot) \
228 F(UPlus) \
229 F(UMinus) \
230 F(UCompl) \
231 F(Increment) \
232 F(Decrement) \
233 F(Add) \
234 F(BitAnd) \
235 F(BitOr) \
236 F(BitXor) \
237 F(UShr) \
238 F(Shr) \
239 F(Shl) \
240 F(BitAndConst) \
241 F(BitOrConst) \
242 F(BitXorConst) \
243 F(UShrConst) \
244 F(ShrConst) \
245 F(ShlConst) \
246 F(Exp) \
247 F(Mul) \
248 F(Div) \
249 F(Mod) \
250 F(Sub) \
251 F(As) \
252 F(CallValue) \
253 F(CallWithReceiver) \
254 F(CallProperty) \
255 F(CallPropertyLookup) \
256 F(CallName) \
257 F(CallPossiblyDirectEval) \
258 F(CallGlobalLookup) \
259 F(CallQmlContextPropertyLookup) \
260 F(CallWithSpread) \
261 F(Construct) \
262 F(ConstructWithSpread) \
263 F(SetUnwindHandler) \
264 F(UnwindDispatch) \
265 F(UnwindToLabel) \
266 F(DeadTemporalZoneCheck) \
267 F(ThrowException) \
268 F(GetException) \
269 F(SetException) \
270 F(CreateCallContext) \
271 F(PushCatchContext) \
272 F(PushWithContext) \
273 F(PushBlockContext) \
274 F(CloneBlockContext) \
275 F(PopContext) \
276 F(GetIterator) \
277 F(IteratorNext) \
278 F(IteratorClose) \
279 F(DestructureRestElement) \
280 F(DeleteProperty) \
281 F(DeleteName) \
282 F(TypeofName) \
283 F(TypeofValue) \
284 F(DeclareVar) \
285 F(DefineArray) \
286 F(DefineObjectLiteral) \
287 F(CreateMappedArgumentsObject) \
288 F(CreateUnmappedArgumentsObject) \
289 F(CreateRestParameter) \
290 F(Yield) \
291 F(YieldStar) \
292 F(Resume) \
293 F(IteratorNextForYieldStar) \
294 F(CreateClass) \
295 F(LoadSuperConstructor) \
296 F(PushScriptContext) \
297 F(PopScriptContext) \
298 F(InitializeBlockDeadTemporalZone) \
299 F(ThrowOnNullOrUndefined) \
300 F(GetTemplateObject) \
301 F(TailCall) \
302 F(Debug) \
303
304#define MOTH_NUM_INSTRUCTIONS() (static_cast<int>(Moth::Instr::Type::Debug_Wide) + 1)
305
306#if defined(Q_CC_GNU)
307#if defined(Q_OS_WASM) && !defined(__asmjs)
308// Upstream llvm does not support computed goto for the wasm target, unlike the 'fastcomp' llvm fork
309// shipped with the emscripten SDK. Disable computed goto usage for non-fastcomp llvm on Wasm.
310#else
311# define MOTH_COMPUTED_GOTO
312#endif
313#endif
314
315#define MOTH_INSTR_ALIGN_MASK (alignof(QV4::Moth::Instr) - 1)
316
317#define MOTH_INSTR_ENUM(I) I, I##_Wide,
318#define MOTH_INSTR_SIZE(I) (sizeof(QV4::Moth::Instr::instr_##I))
319
320#define MOTH_EXPAND_FOR_MSVC(x) x
321#define MOTH_DEFINE_ARGS(nargs, ...) \
322 MOTH_EXPAND_FOR_MSVC(MOTH_DEFINE_ARGS##nargs(__VA_ARGS__))
323
324#define MOTH_DEFINE_ARGS0()
325#define MOTH_DEFINE_ARGS1(arg) \
326 int arg;
327#define MOTH_DEFINE_ARGS2(arg1, arg2) \
328 int arg1; \
329 int arg2;
330#define MOTH_DEFINE_ARGS3(arg1, arg2, arg3) \
331 int arg1; \
332 int arg2; \
333 int arg3;
334#define MOTH_DEFINE_ARGS4(arg1, arg2, arg3, arg4) \
335 int arg1; \
336 int arg2; \
337 int arg3; \
338 int arg4;
339#define MOTH_DEFINE_ARGS5(arg1, arg2, arg3, arg4, arg5) \
340 int arg1; \
341 int arg2; \
342 int arg3; \
343 int arg4; \
344 int arg5;
345
346#define MOTH_COLLECT_ENUMS(instr) \
347 INSTR_##instr(MOTH_GET_ENUM)
348#define MOTH_GET_ENUM_INSTRUCTION(name, ...) \
349 name,
350
351#define MOTH_EMIT_STRUCTS(instr) \
352 INSTR_##instr(MOTH_EMIT_STRUCT)
353#define MOTH_EMIT_STRUCT_INSTRUCTION(name, nargs, ...) \
354 struct instr_##name { \
355 MOTH_DEFINE_ARGS(nargs, __VA_ARGS__) \
356 };
357
358#define MOTH_EMIT_INSTR_MEMBERS(instr) \
359 INSTR_##instr(MOTH_EMIT_INSTR_MEMBER)
360#define MOTH_EMIT_INSTR_MEMBER_INSTRUCTION(name, nargs, ...) \
361 instr_##name name;
362
363#define MOTH_COLLECT_NARGS(instr) \
364 INSTR_##instr(MOTH_COLLECT_ARG_COUNT)
365#define MOTH_COLLECT_ARG_COUNT_INSTRUCTION(name, nargs, ...) \
366 nargs, nargs,
367
368#define MOTH_DECODE_ARG(arg, type, nargs, offset) \
369 arg = qFromLittleEndian<type>(qFromUnaligned<type>(reinterpret_cast<const type *>(code) - nargs + offset));
370#define MOTH_ADJUST_CODE(type, nargs) \
371 code += static_cast<quintptr>(nargs*sizeof(type) + 1)
372
373#define MOTH_DECODE_INSTRUCTION(name, nargs, ...) \
374 MOTH_DEFINE_ARGS(nargs, __VA_ARGS__) \
375 op_int_##name: \
376 MOTH_ADJUST_CODE(int, nargs); \
377 MOTH_DECODE_ARGS(name, int, nargs, __VA_ARGS__) \
378 goto op_main_##name; \
379 op_byte_##name: \
380 MOTH_ADJUST_CODE(qint8, nargs); \
381 MOTH_DECODE_ARGS(name, qint8, nargs, __VA_ARGS__) \
382 op_main_##name: \
383 ; \
384
385#define MOTH_DECODE_WITH_BASE_INSTRUCTION(name, nargs, ...) \
386 MOTH_DEFINE_ARGS(nargs, __VA_ARGS__) \
387 const char *base_ptr; \
388 op_int_##name: \
389 base_ptr = code; \
390 MOTH_ADJUST_CODE(int, nargs); \
391 MOTH_DECODE_ARGS(name, int, nargs, __VA_ARGS__) \
392 goto op_main_##name; \
393 op_byte_##name: \
394 base_ptr = code; \
395 MOTH_ADJUST_CODE(qint8, nargs); \
396 MOTH_DECODE_ARGS(name, qint8, nargs, __VA_ARGS__) \
397 op_main_##name: \
398 ; \
399
400#define MOTH_DECODE_ARGS(name, type, nargs, ...) \
401 MOTH_EXPAND_FOR_MSVC(MOTH_DECODE_ARGS##nargs(name, type, nargs, __VA_ARGS__))
402
403#define MOTH_DECODE_ARGS0(name, type, nargs, dummy)
404#define MOTH_DECODE_ARGS1(name, type, nargs, arg) \
405 MOTH_DECODE_ARG(arg, type, nargs, 0);
406#define MOTH_DECODE_ARGS2(name, type, nargs, arg1, arg2) \
407 MOTH_DECODE_ARGS1(name, type, nargs, arg1); \
408 MOTH_DECODE_ARG(arg2, type, nargs, 1);
409#define MOTH_DECODE_ARGS3(name, type, nargs, arg1, arg2, arg3) \
410 MOTH_DECODE_ARGS2(name, type, nargs, arg1, arg2); \
411 MOTH_DECODE_ARG(arg3, type, nargs, 2);
412#define MOTH_DECODE_ARGS4(name, type, nargs, arg1, arg2, arg3, arg4) \
413 MOTH_DECODE_ARGS3(name, type, nargs, arg1, arg2, arg3); \
414 MOTH_DECODE_ARG(arg4, type, nargs, 3);
415#define MOTH_DECODE_ARGS5(name, type, nargs, arg1, arg2, arg3, arg4, arg5) \
416 MOTH_DECODE_ARGS4(name, type, nargs, arg1, arg2, arg3, arg4); \
417 MOTH_DECODE_ARG(arg5, type, nargs, 4);
418
419#ifdef MOTH_COMPUTED_GOTO
420/* collect jump labels */
421#define COLLECT_LABELS(instr) \
422 INSTR_##instr(GET_LABEL) \
423 INSTR_##instr(GET_LABEL_WIDE)
424#define GET_LABEL_INSTRUCTION(name, ...) \
425 &&op_byte_##name,
426#define GET_LABEL_WIDE_INSTRUCTION(name, ...) \
427 &&op_int_##name,
428
429#define MOTH_JUMP_TABLE \
430 static const void *jumpTable[] = { \
431 FOR_EACH_MOTH_INSTR_ALL(COLLECT_LABELS) \
432 };
433
434#define MOTH_DISPATCH_SINGLE() \
435 goto *jumpTable[*reinterpret_cast<const uchar *>(code)];
436
437#define MOTH_DISPATCH() \
438 MOTH_DISPATCH_SINGLE() \
439 op_byte_Nop: \
440 ++code; \
441 MOTH_DISPATCH_SINGLE() \
442 op_int_Nop: /* wide prefix */ \
443 ++code; \
444 goto *jumpTable[0x100 | *reinterpret_cast<const uchar *>(code)];
445#else
446#define MOTH_JUMP_TABLE
447
448#define MOTH_INSTR_CASE_AND_JUMP(instr) \
449 INSTR_##instr(GET_CASE_AND_JUMP) \
450 INSTR_##instr(GET_CASE_AND_JUMP_WIDE)
451#define GET_CASE_AND_JUMP_INSTRUCTION(name, ...) \
452 case Instr::Type::name: goto op_byte_##name;
453#define GET_CASE_AND_JUMP_WIDE_INSTRUCTION(name, ...) \
454 case Instr::Type::name##_Wide: goto op_int_##name;
455
456#define MOTH_DISPATCH() \
457 Instr::Type type = Instr::Type(static_cast<uchar>(*code)); \
458 dispatch: \
459 switch (type) { \
460 case Instr::Type::Nop: \
461 ++code; \
462 type = Instr::Type(static_cast<uchar>(*code)); \
463 goto dispatch; \
464 case Instr::Type::Nop_Wide: /* wide prefix */ \
465 ++code; \
466 type = Instr::Type(0x100 | static_cast<uchar>(*code)); \
467 goto dispatch; \
468 FOR_EACH_MOTH_INSTR(MOTH_INSTR_CASE_AND_JUMP) \
469 }
470#endif
471
472namespace QV4 {
473
474namespace CompiledData {
475struct CodeOffsetToLineAndStatement;
476}
477
478namespace Moth {
479
480class StackSlot {
481 int index;
482
483public:
484 static StackSlot createRegister(int index) {
485 Q_ASSERT(index >= 0);
486 StackSlot t;
487 t.index = index;
488 return t;
489 }
490
491 int stackSlot() const { return index; }
492 operator int() const { return index; }
493};
494
495inline bool operator==(const StackSlot &l, const StackSlot &r) { return l.stackSlot() == r.stackSlot(); }
496inline bool operator!=(const StackSlot &l, const StackSlot &r) { return l.stackSlot() != r.stackSlot(); }
497
498// When making changes to the instructions, make sure to bump QV4_DATA_STRUCTURE_VERSION in qv4compileddata_p.h
499
500Q_QML_EXPORT
501QString dumpBytecode(
502 const char *bytecode, int len, int nLocals, int nFormals, int beginOffset, int endOffset,
503 const QVector<CompiledData::CodeOffsetToLineAndStatement> &lineAndStatementNumberMapping =
504 QVector<CompiledData::CodeOffsetToLineAndStatement>());
505QString dumpBytecode(
506 const char *bytecode, int len, int nLocals, int nFormals, int startLine = 1,
507 const QVector<CompiledData::CodeOffsetToLineAndStatement> &lineAndStatementNumberMapping =
508 QVector<CompiledData::CodeOffsetToLineAndStatement>());
509inline QString dumpBytecode(
510 const QByteArray &bytecode, int nLocals, int nFormals, int startLine = 1,
511 const QVector<CompiledData::CodeOffsetToLineAndStatement> &lineAndStatementNumberMapping =
512 QVector<CompiledData::CodeOffsetToLineAndStatement>())
513{
514 return dumpBytecode(bytecode: bytecode.constData(), len: bytecode.size(), nLocals, nFormals, startLine,
515 lineAndStatementNumberMapping);
516}
517
518union Instr
519{
520 enum class Type {
521 FOR_EACH_MOTH_INSTR_ALL(MOTH_INSTR_ENUM)
522 };
523
524 static Type wideInstructionType(Type t) { return Type(int(t) | 1); }
525 static Type narrowInstructionType(Type t) { return Type(int(t) & ~1); }
526 static bool isWide(Type t) { return int(t) & 1; }
527 static bool isNarrow(Type t) { return !(int(t) & 1); }
528 static int encodedLength(Type t) { return int(t) >= 256 ? 2 : 1; }
529
530 static Type unpack(const uchar *c) { if (c[0] == 0x1) return Type(0x100 + c[1]); return Type(c[0]); }
531 static uchar *pack(uchar *c, Type t) {
532 if (uint(t) >= 256) {
533 c[0] = 0x1;
534 c[1] = uint(t) &0xff;
535 return c + 2;
536 }
537 c[0] = uchar(uint(t));
538 return c + 1;
539 }
540
541 FOR_EACH_MOTH_INSTR_ALL(MOTH_EMIT_STRUCTS)
542
543 FOR_EACH_MOTH_INSTR_ALL(MOTH_EMIT_INSTR_MEMBERS)
544
545 int argumentsAsInts[4];
546};
547
548struct InstrInfo
549{
550 static const int argumentCount[];
551 static int size(Instr::Type type);
552};
553
554template<int N>
555struct InstrMeta {
556};
557
558QT_WARNING_PUSH
559QT_WARNING_DISABLE_GCC("-Wuninitialized")
560QT_WARNING_DISABLE_GCC("-Wmaybe-uninitialized")
561#define MOTH_INSTR_META_TEMPLATE(I) \
562 template<> struct InstrMeta<int(Instr::Type::I)> { \
563 enum { Size = MOTH_INSTR_SIZE(I) }; \
564 typedef Instr::instr_##I DataType; \
565 static const DataType &data(const Instr &instr) { return instr.I; } \
566 static void setData(Instr &instr, const DataType &v) \
567 { memcpy(reinterpret_cast<char *>(&instr.I), \
568 reinterpret_cast<const char *>(&v), \
569 Size); } \
570 };
571FOR_EACH_MOTH_INSTR_ALL(MOTH_INSTR_META_TEMPLATE);
572#undef MOTH_INSTR_META_TEMPLATE
573QT_WARNING_POP
574
575template<int InstrType>
576class InstrData : public InstrMeta<InstrType>::DataType
577{
578};
579
580struct Instruction {
581#define MOTH_INSTR_DATA_TYPEDEF(I) typedef InstrData<int(Instr::Type::I)> I;
582FOR_EACH_MOTH_INSTR_ALL(MOTH_INSTR_DATA_TYPEDEF)
583#undef MOTH_INSTR_DATA_TYPEDEF
584private:
585 Instruction();
586};
587
588} // namespace Moth
589} // namespace QV4
590
591QT_END_NAMESPACE
592
593#endif // QV4INSTR_MOTH_P_H
594

source code of qtdeclarative/src/qml/compiler/qv4instr_moth_p.h