src/v8/src/compiler/instruction-codes.h

   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_