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1 : // Copyright 2012 the V8 project authors. All rights reserved.
2 : // Use of this source code is governed by a BSD-style license that can be
3 : // found in the LICENSE file.
4 :
5 : #ifndef V8_CODEGEN_H_
6 : #define V8_CODEGEN_H_
7 :
8 : #include "src/code-stubs.h"
9 : #include "src/globals.h"
10 : #include "src/runtime/runtime.h"
11 :
12 : // Include the declaration of the architecture defined class CodeGenerator.
13 : // The contract to the shared code is that the the CodeGenerator is a subclass
14 : // of Visitor and that the following methods are available publicly:
15 : // MakeCode
16 : // MakeCodePrologue
17 : // MakeCodeEpilogue
18 : // masm
19 : // frame
20 : // script
21 : // has_valid_frame
22 : // SetFrame
23 : // DeleteFrame
24 : // allocator
25 : // AddDeferred
26 : // in_spilled_code
27 : // set_in_spilled_code
28 : // RecordPositions
29 : //
30 : // These methods are either used privately by the shared code or implemented as
31 : // shared code:
32 : // CodeGenerator
33 : // ~CodeGenerator
34 : // Generate
35 : // ComputeLazyCompile
36 : // ProcessDeclarations
37 : // DeclareGlobals
38 : // CheckForInlineRuntimeCall
39 : // AnalyzeCondition
40 : // CodeForFunctionPosition
41 : // CodeForReturnPosition
42 : // CodeForStatementPosition
43 : // CodeForDoWhileConditionPosition
44 : // CodeForSourcePosition
45 :
46 : #if V8_TARGET_ARCH_IA32
47 : #include "src/ia32/codegen-ia32.h" // NOLINT
48 : #elif V8_TARGET_ARCH_X64
49 : #include "src/x64/codegen-x64.h" // NOLINT
50 : #elif V8_TARGET_ARCH_ARM64
51 : #include "src/arm64/codegen-arm64.h" // NOLINT
52 : #elif V8_TARGET_ARCH_ARM
53 : #include "src/arm/codegen-arm.h" // NOLINT
54 : #elif V8_TARGET_ARCH_PPC
55 : #include "src/ppc/codegen-ppc.h" // NOLINT
56 : #elif V8_TARGET_ARCH_MIPS
57 : #include "src/mips/codegen-mips.h" // NOLINT
58 : #elif V8_TARGET_ARCH_MIPS64
59 : #include "src/mips64/codegen-mips64.h" // NOLINT
60 : #elif V8_TARGET_ARCH_S390
61 : #include "src/s390/codegen-s390.h" // NOLINT
62 : #elif V8_TARGET_ARCH_X87
63 : #include "src/x87/codegen-x87.h" // NOLINT
64 : #else
65 : #error Unsupported target architecture.
66 : #endif
67 :
68 : namespace v8 {
69 : namespace internal {
70 :
71 :
72 : class CompilationInfo;
73 : class EhFrameWriter;
74 :
75 : class CodeGenerator {
76 : public:
77 : // Printing of AST, etc. as requested by flags.
78 : static void MakeCodePrologue(CompilationInfo* info, const char* kind);
79 :
80 : // Allocate and install the code.
81 : static Handle<Code> MakeCodeEpilogue(MacroAssembler* masm,
82 : EhFrameWriter* unwinding,
83 : CompilationInfo* info,
84 : Handle<Object> self_reference);
85 :
86 : // Print the code after compiling it.
87 : static void PrintCode(Handle<Code> code, CompilationInfo* info);
88 :
89 : private:
90 : DISALLOW_COPY_AND_ASSIGN(CodeGenerator);
91 : };
92 :
93 :
94 : // Results of the library implementation of transcendental functions may differ
95 : // from the one we use in our generated code. Therefore we use the same
96 : // generated code both in runtime and compiled code.
97 : typedef double (*UnaryMathFunctionWithIsolate)(double x, Isolate* isolate);
98 :
99 : UnaryMathFunctionWithIsolate CreateSqrtFunction(Isolate* isolate);
100 :
101 : V8_EXPORT_PRIVATE double modulo(double x, double y);
102 :
103 : // Custom implementation of math functions.
104 : double fast_sqrt(double input, Isolate* isolate);
105 : void lazily_initialize_fast_sqrt(Isolate* isolate);
106 :
107 : class CodeAgingHelper {
108 : public:
109 : explicit CodeAgingHelper(Isolate* isolate);
110 :
111 1667487 : uint32_t young_sequence_length() const { return young_sequence_.length(); }
112 : bool IsYoung(byte* candidate) const {
113 : return memcmp(candidate,
114 : young_sequence_.start(),
115 6303174 : young_sequence_.length()) == 0;
116 : }
117 : void CopyYoungSequenceTo(byte* new_buffer) const {
118 656451 : CopyBytes(new_buffer, young_sequence_.start(), young_sequence_.length());
119 : }
120 :
121 : #ifdef DEBUG
122 : bool IsOld(byte* candidate) const;
123 : #endif
124 :
125 : protected:
126 : const EmbeddedVector<byte, kNoCodeAgeSequenceLength> young_sequence_;
127 : #ifdef DEBUG
128 : #ifdef V8_TARGET_ARCH_ARM64
129 : const EmbeddedVector<byte, kNoCodeAgeSequenceLength> old_sequence_;
130 : #endif
131 : #endif
132 : };
133 :
134 : } // namespace internal
135 : } // namespace v8
136 :
137 : #endif // V8_CODEGEN_H_
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