1 // Copyright 2014 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_COMPILER_INSTRUCTION_CODES_H_
6 #define V8_COMPILER_INSTRUCTION_CODES_H_
7 
8 #if V8_TARGET_ARCH_ARM
9 #include "src/compiler/arm/instruction-codes-arm.h"
10 #elif V8_TARGET_ARCH_ARM64
11 #include "src/compiler/arm64/instruction-codes-arm64.h"
12 #elif V8_TARGET_ARCH_IA32
13 #include "src/compiler/ia32/instruction-codes-ia32.h"
14 #elif V8_TARGET_ARCH_X64
15 #include "src/compiler/x64/instruction-codes-x64.h"
16 #else
17 #define TARGET_ARCH_OPCODE_LIST(V)
18 #define TARGET_ADDRESSING_MODE_LIST(V)
19 #endif
20 #include "src/utils.h"
21 
22 namespace v8 {
23 namespace internal {
24 
25 class OStream;
26 
27 namespace compiler {
28 
29 // Target-specific opcodes that specify which assembly sequence to emit.
30 // Most opcodes specify a single instruction.
31 #define ARCH_OPCODE_LIST(V) \
32   V(ArchCallCodeObject)     \
33   V(ArchCallJSFunction)     \
34   V(ArchJmp)                \
35   V(ArchNop)                \
36   V(ArchRet)                \
37   V(ArchTruncateDoubleToI)  \
38   TARGET_ARCH_OPCODE_LIST(V)
39 
40 enum ArchOpcode {
41 #define DECLARE_ARCH_OPCODE(Name) k##Name,
42   ARCH_OPCODE_LIST(DECLARE_ARCH_OPCODE)
43 #undef DECLARE_ARCH_OPCODE
44 #define COUNT_ARCH_OPCODE(Name) +1
45   kLastArchOpcode = -1 ARCH_OPCODE_LIST(COUNT_ARCH_OPCODE)
46 #undef COUNT_ARCH_OPCODE
47 };
48 
49 OStream& operator<<(OStream& os, const ArchOpcode& ao);
50 
51 // Addressing modes represent the "shape" of inputs to an instruction.
52 // Many instructions support multiple addressing modes. Addressing modes
53 // are encoded into the InstructionCode of the instruction and tell the
54 // code generator after register allocation which assembler method to call.
55 #define ADDRESSING_MODE_LIST(V) \
56   V(None)                       \
57   TARGET_ADDRESSING_MODE_LIST(V)
58 
59 enum AddressingMode {
60 #define DECLARE_ADDRESSING_MODE(Name) kMode_##Name,
61   ADDRESSING_MODE_LIST(DECLARE_ADDRESSING_MODE)
62 #undef DECLARE_ADDRESSING_MODE
63 #define COUNT_ADDRESSING_MODE(Name) +1
64   kLastAddressingMode = -1 ADDRESSING_MODE_LIST(COUNT_ADDRESSING_MODE)
65 #undef COUNT_ADDRESSING_MODE
66 };
67 
68 OStream& operator<<(OStream& os, const AddressingMode& am);
69 
70 // The mode of the flags continuation (see below).
71 enum FlagsMode { kFlags_none = 0, kFlags_branch = 1, kFlags_set = 2 };
72 
73 OStream& operator<<(OStream& os, const FlagsMode& fm);
74 
75 // The condition of flags continuation (see below).
76 enum FlagsCondition {
77   kEqual,
78   kNotEqual,
79   kSignedLessThan,
80   kSignedGreaterThanOrEqual,
81   kSignedLessThanOrEqual,
82   kSignedGreaterThan,
83   kUnsignedLessThan,
84   kUnsignedGreaterThanOrEqual,
85   kUnsignedLessThanOrEqual,
86   kUnsignedGreaterThan,
87   kUnorderedEqual,
88   kUnorderedNotEqual,
89   kUnorderedLessThan,
90   kUnorderedGreaterThanOrEqual,
91   kUnorderedLessThanOrEqual,
92   kUnorderedGreaterThan,
93   kOverflow,
94   kNotOverflow
95 };
96 
97 OStream& operator<<(OStream& os, const FlagsCondition& fc);
98 
99 // The InstructionCode is an opaque, target-specific integer that encodes
100 // what code to emit for an instruction in the code generator. It is not
101 // interesting to the register allocator, as the inputs and flags on the
102 // instructions specify everything of interest.
103 typedef int32_t InstructionCode;
104 
105 // Helpers for encoding / decoding InstructionCode into the fields needed
106 // for code generation. We encode the instruction, addressing mode, and flags
107 // continuation into a single InstructionCode which is stored as part of
108 // the instruction.
109 typedef BitField<ArchOpcode, 0, 7> ArchOpcodeField;
110 typedef BitField<AddressingMode, 7, 4> AddressingModeField;
111 typedef BitField<FlagsMode, 11, 2> FlagsModeField;
112 typedef BitField<FlagsCondition, 13, 5> FlagsConditionField;
113 typedef BitField<int, 13, 19> MiscField;
114 
115 }  // namespace compiler
116 }  // namespace internal
117 }  // namespace v8
118 
119 #endif  // V8_COMPILER_INSTRUCTION_CODES_H_
120