| // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| #ifndef RUNTIME_VM_CONSTANTS_X64_H_ |
| #define RUNTIME_VM_CONSTANTS_X64_H_ |
| |
| namespace dart { |
| |
| enum Register { |
| RAX = 0, |
| RCX = 1, |
| RDX = 2, |
| RBX = 3, |
| RSP = 4, |
| RBP = 5, |
| RSI = 6, |
| RDI = 7, |
| R8 = 8, |
| R9 = 9, |
| R10 = 10, |
| R11 = 11, |
| R12 = 12, |
| R13 = 13, |
| R14 = 14, |
| R15 = 15, |
| kNumberOfCpuRegisters = 16, |
| kNoRegister = -1, // Signals an illegal register. |
| }; |
| |
| enum ByteRegister { |
| AL = 0, |
| CL = 1, |
| DL = 2, |
| BL = 3, |
| AH = 4, |
| CH = 5, |
| DH = 6, |
| BH = 7, |
| SPL = 4 | 0x10, |
| BPL = 5 | 0x10, |
| SIL = 6 | 0x10, |
| DIL = 7 | 0x10, |
| R8B = 8, |
| R9B = 9, |
| R10B = 10, |
| R11B = 11, |
| R12B = 12, |
| R13B = 13, |
| R14B = 14, |
| R15B = 15, |
| kNoByteRegister = -1 // Signals an illegal register. |
| }; |
| |
| inline ByteRegister ByteRegisterOf(Register reg) { |
| if (RSP <= reg && reg <= RDI) { |
| return static_cast<ByteRegister>(reg | 0x10); |
| } else { |
| return static_cast<ByteRegister>(reg); |
| } |
| } |
| |
| enum XmmRegister { |
| XMM0 = 0, |
| XMM1 = 1, |
| XMM2 = 2, |
| XMM3 = 3, |
| XMM4 = 4, |
| XMM5 = 5, |
| XMM6 = 6, |
| XMM7 = 7, |
| XMM8 = 8, |
| XMM9 = 9, |
| XMM10 = 10, |
| XMM11 = 11, |
| XMM12 = 12, |
| XMM13 = 13, |
| XMM14 = 14, |
| XMM15 = 15, |
| kNumberOfXmmRegisters = 16, |
| kNoXmmRegister = -1 // Signals an illegal register. |
| }; |
| |
| // Architecture independent aliases. |
| typedef XmmRegister FpuRegister; |
| const FpuRegister FpuTMP = XMM0; |
| const int kNumberOfFpuRegisters = kNumberOfXmmRegisters; |
| const FpuRegister kNoFpuRegister = kNoXmmRegister; |
| |
| enum RexBits { |
| REX_NONE = 0, |
| REX_B = 1 << 0, |
| REX_X = 1 << 1, |
| REX_R = 1 << 2, |
| REX_W = 1 << 3, |
| REX_PREFIX = 1 << 6 |
| }; |
| |
| // Register aliases. |
| const Register TMP = R11; // Used as scratch register by the assembler. |
| const Register TMP2 = kNoRegister; // No second assembler scratch register. |
| // Caches object pool pointer in generated code. |
| const Register PP = R15; |
| const Register SPREG = RSP; // Stack pointer register. |
| const Register FPREG = RBP; // Frame pointer register. |
| const Register ARGS_DESC_REG = R10; // Arguments descriptor register. |
| const Register CODE_REG = R12; |
| const Register THR = R14; // Caches current thread in generated code. |
| const Register CALLEE_SAVED_TEMP = RBX; |
| |
| // ABI for catch-clause entry point. |
| const Register kExceptionObjectReg = RAX; |
| const Register kStackTraceObjectReg = RDX; |
| |
| // ABI for write barrier stub. |
| const Register kWriteBarrierObjectReg = RDX; |
| const Register kWriteBarrierValueReg = RAX; |
| const Register kWriteBarrierSlotReg = R13; |
| |
| typedef uint32_t RegList; |
| const RegList kAllCpuRegistersList = 0xFFFF; |
| const RegList kAllFpuRegistersList = 0xFFFF; |
| |
| const RegList kReservedCpuRegisters = |
| (1 << SPREG) | (1 << FPREG) | (1 << TMP) | (1 << PP) | (1 << THR); |
| constexpr intptr_t kNumberOfReservedCpuRegisters = 5; |
| // CPU registers available to Dart allocator. |
| const RegList kDartAvailableCpuRegs = |
| kAllCpuRegistersList & ~kReservedCpuRegisters; |
| constexpr int kNumberOfDartAvailableCpuRegs = |
| kNumberOfCpuRegisters - kNumberOfReservedCpuRegisters; |
| constexpr int kStoreBufferWrapperSize = 13; |
| |
| enum ScaleFactor { |
| TIMES_1 = 0, |
| TIMES_2 = 1, |
| TIMES_4 = 2, |
| TIMES_8 = 3, |
| TIMES_16 = 4, |
| TIMES_HALF_WORD_SIZE = kWordSizeLog2 - 1 |
| }; |
| |
| #define R(reg) (1 << (reg)) |
| |
| #if defined(_WIN64) |
| class CallingConventions { |
| public: |
| static const Register kArg1Reg = RCX; |
| static const Register kArg2Reg = RDX; |
| static const Register kArg3Reg = R8; |
| static const Register kArg4Reg = R9; |
| static const intptr_t kShadowSpaceBytes = 4 * kWordSize; |
| |
| static const intptr_t kVolatileCpuRegisters = |
| R(RAX) | R(RCX) | R(RDX) | R(R8) | R(R9) | R(R10) | R(R11); |
| |
| static const intptr_t kVolatileXmmRegisters = |
| R(XMM0) | R(XMM1) | R(XMM2) | R(XMM3) | R(XMM4) | R(XMM5); |
| |
| static const intptr_t kCalleeSaveCpuRegisters = |
| R(RBX) | R(RSI) | R(RDI) | R(R12) | R(R13) | R(R14) | R(R15); |
| |
| static const intptr_t kCalleeSaveXmmRegisters = |
| R(XMM6) | R(XMM7) | R(XMM8) | R(XMM9) | R(XMM10) | R(XMM11) | R(XMM12) | |
| R(XMM13) | R(XMM14) | R(XMM15); |
| |
| // Windows x64 ABI specifies that small objects are passed in registers. |
| // Otherwise they are passed by reference. |
| static const size_t kRegisterTransferLimit = 16; |
| }; |
| #else |
| class CallingConventions { |
| public: |
| static const Register kArg1Reg = RDI; |
| static const Register kArg2Reg = RSI; |
| static const Register kArg3Reg = RDX; |
| static const Register kArg4Reg = RCX; |
| static const Register kArg5Reg = R8; |
| static const Register kArg6Reg = R9; |
| static const intptr_t kShadowSpaceBytes = 0; |
| |
| static const intptr_t kVolatileCpuRegisters = R(RAX) | R(RCX) | R(RDX) | |
| R(RSI) | R(RDI) | R(R8) | |
| R(R9) | R(R10) | R(R11); |
| |
| static const intptr_t kVolatileXmmRegisters = |
| R(XMM0) | R(XMM1) | R(XMM2) | R(XMM3) | R(XMM4) | R(XMM5) | R(XMM6) | |
| R(XMM7) | R(XMM8) | R(XMM9) | R(XMM10) | R(XMM11) | R(XMM12) | R(XMM13) | |
| R(XMM14) | R(XMM15); |
| |
| static const intptr_t kCalleeSaveCpuRegisters = |
| R(RBX) | R(R12) | R(R13) | R(R14) | R(R15); |
| |
| static const intptr_t kCalleeSaveXmmRegisters = 0; |
| }; |
| #endif |
| |
| #undef R |
| |
| class Instr { |
| public: |
| static const uint8_t kHltInstruction = 0xF4; |
| // We prefer not to use the int3 instruction since it conflicts with gdb. |
| static const uint8_t kBreakPointInstruction = kHltInstruction; |
| static const int kBreakPointInstructionSize = 1; |
| static const uint8_t kGdbBreakpointInstruction = 0xcc; |
| |
| bool IsBreakPoint() { |
| ASSERT(kBreakPointInstructionSize == 1); |
| return (*reinterpret_cast<const uint8_t*>(this)) == kBreakPointInstruction; |
| } |
| |
| // Instructions are read out of a code stream. The only way to get a |
| // reference to an instruction is to convert a pointer. There is no way |
| // to allocate or create instances of class Instr. |
| // Use the At(pc) function to create references to Instr. |
| static Instr* At(uword pc) { return reinterpret_cast<Instr*>(pc); } |
| |
| private: |
| DISALLOW_ALLOCATION(); |
| // We need to prevent the creation of instances of class Instr. |
| DISALLOW_IMPLICIT_CONSTRUCTORS(Instr); |
| }; |
| |
| // The largest multibyte nop we will emit. This could go up to 15 if it |
| // becomes important to us. |
| const int MAX_NOP_SIZE = 8; |
| |
| } // namespace dart |
| |
| #endif // RUNTIME_VM_CONSTANTS_X64_H_ |