mozjs_sys 0.67.1

System crate for the Mozilla SpiderMonkey JavaScript engine.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 * vim: set ts=8 sts=2 et sw=2 tw=80:
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef jit_arm64_CodeGenerator_arm64_h
#define jit_arm64_CodeGenerator_arm64_h

#include "jit/arm64/Assembler-arm64.h"
#include "jit/shared/CodeGenerator-shared.h"

namespace js {
namespace jit {

class OutOfLineBailout;
class OutOfLineTableSwitch;

class CodeGeneratorARM64 : public CodeGeneratorShared {
  friend class MoveResolverARM64;

 protected:
  CodeGeneratorARM64(MIRGenerator* gen, LIRGraph* graph, MacroAssembler* masm);

  NonAssertingLabel deoptLabel_;

  MoveOperand toMoveOperand(const LAllocation a) const;

  void bailoutIf(Assembler::Condition condition, LSnapshot* snapshot);
  void bailoutFrom(Label* label, LSnapshot* snapshot);
  void bailout(LSnapshot* snapshot);

  template <typename T1, typename T2>
  void bailoutCmpPtr(Assembler::Condition c, T1 lhs, T2 rhs,
                     LSnapshot* snapshot) {
    masm.cmpPtr(lhs, rhs);
    return bailoutIf(c, snapshot);
  }
  void bailoutTestPtr(Assembler::Condition c, Register lhs, Register rhs,
                      LSnapshot* snapshot) {
    masm.testPtr(lhs, rhs);
    return bailoutIf(c, snapshot);
  }
  template <typename T1, typename T2>
  void bailoutCmp32(Assembler::Condition c, T1 lhs, T2 rhs,
                    LSnapshot* snapshot) {
    masm.cmp32(lhs, rhs);
    return bailoutIf(c, snapshot);
  }
  template <typename T1, typename T2>
  void bailoutTest32(Assembler::Condition c, T1 lhs, T2 rhs,
                     LSnapshot* snapshot) {
    masm.test32(lhs, rhs);
    return bailoutIf(c, snapshot);
  }
  void bailoutIfFalseBool(Register reg, LSnapshot* snapshot) {
    masm.test32(reg, Imm32(0xFF));
    return bailoutIf(Assembler::Zero, snapshot);
  }

  bool generateOutOfLineCode();

  // Emits a branch that directs control flow to the true block if |cond| is
  // true, and the false block if |cond| is false.
  void emitBranch(Assembler::Condition cond, MBasicBlock* ifTrue,
                  MBasicBlock* ifFalse);

  void testNullEmitBranch(Assembler::Condition cond, const ValueOperand& value,
                          MBasicBlock* ifTrue, MBasicBlock* ifFalse) {
    cond = masm.testNull(cond, value);
    emitBranch(cond, ifTrue, ifFalse);
  }
  void testUndefinedEmitBranch(Assembler::Condition cond,
                               const ValueOperand& value, MBasicBlock* ifTrue,
                               MBasicBlock* ifFalse) {
    cond = masm.testUndefined(cond, value);
    emitBranch(cond, ifTrue, ifFalse);
  }
  void testObjectEmitBranch(Assembler::Condition cond,
                            const ValueOperand& value, MBasicBlock* ifTrue,
                            MBasicBlock* ifFalse) {
    cond = masm.testObject(cond, value);
    emitBranch(cond, ifTrue, ifFalse);
  }
  void testZeroEmitBranch(Assembler::Condition cond, Register reg,
                          MBasicBlock* ifTrue, MBasicBlock* ifFalse) {
    MOZ_ASSERT(cond == Assembler::Equal || cond == Assembler::NotEqual);
    masm.cmpPtr(reg, ImmWord(0));
    emitBranch(cond, ifTrue, ifFalse);
  }

  void emitTableSwitchDispatch(MTableSwitch* mir, Register index,
                               Register base);

  ValueOperand ToValue(LInstruction* ins, size_t pos);
  ValueOperand ToTempValue(LInstruction* ins, size_t pos);

  void storeElementTyped(const LAllocation* value, MIRType valueType,
                         MIRType elementType, Register elements,
                         const LAllocation* index);

  void divICommon(MDiv* mir, Register lhs, Register rhs, Register output,
                  LSnapshot* snapshot, Label& done);
  void modICommon(MMod* mir, Register lhs, Register rhs, Register output,
                  LSnapshot* snapshot, Label& done);

  void generateInvalidateEpilogue();

 public:
  void visitOutOfLineBailout(OutOfLineBailout* ool);
  void visitOutOfLineTableSwitch(OutOfLineTableSwitch* ool);
};

typedef CodeGeneratorARM64 CodeGeneratorSpecific;

// An out-of-line bailout thunk.
class OutOfLineBailout : public OutOfLineCodeBase<CodeGeneratorARM64> {
 protected:  // Silence Clang warning.
  LSnapshot* snapshot_;

 public:
  explicit OutOfLineBailout(LSnapshot* snapshot) : snapshot_(snapshot) {}

  void accept(CodeGeneratorARM64* codegen) override;

  LSnapshot* snapshot() const { return snapshot_; }
};

}  // namespace jit
}  // namespace js

#endif /* jit_arm64_CodeGenerator_arm64_h */