1// Copyright (C) 2018 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// Qt-Security score:significant
4
5#ifndef QV4BASELINEASSEMBLER_P_H
6#define QV4BASELINEASSEMBLER_P_H
7
8//
9// W A R N I N G
10// -------------
11//
12// This file is not part of the Qt API. It exists purely as an
13// implementation detail. This header file may change from version to
14// version without notice, or even be removed.
15//
16// We mean it.
17//
18
19#include <private/qv4global_p.h>
20#include <private/qv4function_p.h>
21#include <QHash>
22
23#if QT_CONFIG(qml_jit)
24
25QT_BEGIN_NAMESPACE
26
27namespace QV4 {
28namespace JIT {
29
30#define GENERATE_RUNTIME_CALL(function, destination) \
31 callRuntime(reinterpret_cast<void *>(&Runtime::function::call), \
32 destination)
33#define GENERATE_TAIL_CALL(function) \
34 tailCallRuntime(reinterpret_cast<void *>(&function))
35
36class BaselineAssembler {
37public:
38 BaselineAssembler(const Value* constantTable);
39 ~BaselineAssembler();
40
41 // codegen infrastructure
42 void generatePrologue();
43 void generateEpilogue();
44 void link(Function *function);
45 void addLabel(int offset);
46
47 // loads/stores/moves
48 void loadConst(int constIndex);
49 void copyConst(int constIndex, int destReg);
50 void loadReg(int reg);
51 void moveReg(int sourceReg, int destReg);
52 void storeReg(int reg);
53 void loadLocal(int index, int level = 0);
54 void storeLocal(int index, int level = 0);
55 void loadString(int stringId);
56 void loadValue(ReturnedValue value);
57 void storeHeapObject(int reg);
58 void loadImport(int index);
59
60 // numeric ops
61 void unot();
62 void toNumber();
63 void uminus();
64 void ucompl();
65 void inc();
66 void dec();
67 void add(int lhs);
68 void bitAnd(int lhs);
69 void bitOr(int lhs);
70 void bitXor(int lhs);
71 void ushr(int lhs);
72 void shr(int lhs);
73 void shl(int lhs);
74 void bitAndConst(int rhs);
75 void bitOrConst(int rhs);
76 void bitXorConst(int rhs);
77 void ushrConst(int rhs);
78 void shrConst(int rhs);
79 void shlConst(int rhs);
80 void mul(int lhs);
81 void div(int lhs);
82 void mod(int lhs);
83 void sub(int lhs);
84
85 // comparissons
86 void cmpeqNull();
87 void cmpneNull();
88 void cmpeqInt(int lhs);
89 void cmpneInt(int lhs);
90 void cmpeq(int lhs);
91 void cmpne(int lhs);
92 void cmpgt(int lhs);
93 void cmpge(int lhs);
94 void cmplt(int lhs);
95 void cmple(int lhs);
96 void cmpStrictEqual(int lhs);
97 void cmpStrictNotEqual(int lhs);
98
99 // jumps
100 Q_REQUIRED_RESULT int jump(int offset);
101 Q_REQUIRED_RESULT int jumpTrue(int offset);
102 Q_REQUIRED_RESULT int jumpFalse(int offset);
103 Q_REQUIRED_RESULT int jumpNoException(int offset);
104 Q_REQUIRED_RESULT int jumpNotUndefined(int offset);
105 Q_REQUIRED_RESULT int jumpEqNull(int offset);
106
107 // stuff for runtime calls
108 void prepareCallWithArgCount(int argc);
109 void storeInstructionPointer(int instructionOffset);
110 void passAccumulatorAsArg(int arg);
111 void passFunctionAsArg(int arg);
112 void passEngineAsArg(int arg);
113 void passJSSlotAsArg(int reg, int arg);
114 void passCppFrameAsArg(int arg);
115 void passInt32AsArg(int value, int arg);
116 void passPointerAsArg(void *ptr, int arg);
117 void callRuntime(const void *funcPtr, CallResultDestination dest);
118 void saveAccumulatorInFrame();
119 void loadAccumulatorFromFrame();
120 void jsTailCall(int func, int thisObject, int argc, int argv);
121
122 // exception/context stuff
123 void checkException();
124 void gotoCatchException();
125 void getException();
126 void setException();
127 Q_REQUIRED_RESULT int setUnwindHandler(int offset);
128 void clearUnwindHandler();
129 void unwindDispatch();
130 Q_REQUIRED_RESULT int unwindToLabel(int level, int offset);
131 void pushCatchContext(int index, int name);
132 void popContext();
133 void deadTemporalZoneCheck(int offsetForSavedIP, int variableName);
134
135 // other stuff
136 void ret();
137
138protected:
139 void *d;
140
141private:
142 typedef unsigned(*CmpFunc)(const Value&,const Value&);
143 void cmp(int cond, CmpFunc function, int lhs);
144};
145
146} // namespace JIT
147} // namespace QV4
148
149QT_END_NAMESPACE
150
151#endif // QT_CONFIG(qml_jit)
152
153#endif // QV4BASELINEASSEMBLER_P_H
154

source code of qtdeclarative/src/qml/jit/qv4baselineassembler_p.h