1 //===-- SystemZMCTargetDesc.h - SystemZ target descriptions -----*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #ifndef LLVM_LIB_TARGET_SYSTEMZ_MCTARGETDESC_SYSTEMZMCTARGETDESC_H 11 #define LLVM_LIB_TARGET_SYSTEMZ_MCTARGETDESC_SYSTEMZMCTARGETDESC_H 12 13 #include "llvm/Support/DataTypes.h" 14 15 namespace llvm { 16 17 class MCAsmBackend; 18 class MCCodeEmitter; 19 class MCContext; 20 class MCInstrInfo; 21 class MCObjectWriter; 22 class MCRegisterInfo; 23 class MCSubtargetInfo; 24 class StringRef; 25 class Target; 26 class Triple; 27 class raw_pwrite_stream; 28 class raw_ostream; 29 30 extern Target TheSystemZTarget; 31 32 namespace SystemZMC { 33 // How many bytes are in the ABI-defined, caller-allocated part of 34 // a stack frame. 35 const int64_t CallFrameSize = 160; 36 37 // The offset of the DWARF CFA from the incoming stack pointer. 38 const int64_t CFAOffsetFromInitialSP = CallFrameSize; 39 40 // Maps of asm register numbers to LLVM register numbers, with 0 indicating 41 // an invalid register. In principle we could use 32-bit and 64-bit register 42 // classes directly, provided that we relegated the GPR allocation order 43 // in SystemZRegisterInfo.td to an AltOrder and left the default order 44 // as %r0-%r15. It seems better to provide the same interface for 45 // all classes though. 46 extern const unsigned GR32Regs[16]; 47 extern const unsigned GRH32Regs[16]; 48 extern const unsigned GR64Regs[16]; 49 extern const unsigned GR128Regs[16]; 50 extern const unsigned FP32Regs[16]; 51 extern const unsigned FP64Regs[16]; 52 extern const unsigned FP128Regs[16]; 53 extern const unsigned VR32Regs[32]; 54 extern const unsigned VR64Regs[32]; 55 extern const unsigned VR128Regs[32]; 56 57 // Return the 0-based number of the first architectural register that 58 // contains the given LLVM register. E.g. R1D -> 1. 59 unsigned getFirstReg(unsigned Reg); 60 61 // Return the given register as a GR64. getRegAsGR64(unsigned Reg)62inline unsigned getRegAsGR64(unsigned Reg) { 63 return GR64Regs[getFirstReg(Reg)]; 64 } 65 66 // Return the given register as a low GR32. getRegAsGR32(unsigned Reg)67inline unsigned getRegAsGR32(unsigned Reg) { 68 return GR32Regs[getFirstReg(Reg)]; 69 } 70 71 // Return the given register as a high GR32. getRegAsGRH32(unsigned Reg)72inline unsigned getRegAsGRH32(unsigned Reg) { 73 return GRH32Regs[getFirstReg(Reg)]; 74 } 75 76 // Return the given register as a VR128. getRegAsVR128(unsigned Reg)77inline unsigned getRegAsVR128(unsigned Reg) { 78 return VR128Regs[getFirstReg(Reg)]; 79 } 80 } // end namespace SystemZMC 81 82 MCCodeEmitter *createSystemZMCCodeEmitter(const MCInstrInfo &MCII, 83 const MCRegisterInfo &MRI, 84 MCContext &Ctx); 85 86 MCAsmBackend *createSystemZMCAsmBackend(const Target &T, 87 const MCRegisterInfo &MRI, 88 const Triple &TT, StringRef CPU); 89 90 MCObjectWriter *createSystemZObjectWriter(raw_pwrite_stream &OS, uint8_t OSABI); 91 } // end namespace llvm 92 93 // Defines symbolic names for SystemZ registers. 94 // This defines a mapping from register name to register number. 95 #define GET_REGINFO_ENUM 96 #include "SystemZGenRegisterInfo.inc" 97 98 // Defines symbolic names for the SystemZ instructions. 99 #define GET_INSTRINFO_ENUM 100 #include "SystemZGenInstrInfo.inc" 101 102 #define GET_SUBTARGETINFO_ENUM 103 #include "SystemZGenSubtargetInfo.inc" 104 105 #endif 106