lib/Target/SystemZ/MCTargetDesc/SystemZMCTargetDesc.h

   1 //===-- SystemZMCTargetDesc.h - SystemZ target descriptions -----*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #ifndef LLVM_LIB_TARGET_SYSTEMZ_MCTARGETDESC_SYSTEMZMCTARGETDESC_H
  10 #define LLVM_LIB_TARGET_SYSTEMZ_MCTARGETDESC_SYSTEMZMCTARGETDESC_H
  11
  12 #include "llvm/Support/DataTypes.h"
  13
  14 #include <memory>
  15
  16 namespace llvm {
  17
  18 class MCAsmBackend;
  19 class MCCodeEmitter;
  20 class MCContext;
  21 class MCInstrInfo;
  22 class MCObjectTargetWriter;
  23 class MCRegisterInfo;
  24 class MCSubtargetInfo;
  25 class MCTargetOptions;
  26 class StringRef;
  27 class Target;
  28 class Triple;
  29 class raw_pwrite_stream;
  30 class raw_ostream;
  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 extern const unsigned AR32Regs[16];
  57 extern const unsigned CR64Regs[16];
  58
  59 // Return the 0-based number of the first architectural register that
  60 // contains the given LLVM register.   E.g. R1D -> 1.
  61 unsigned getFirstReg(unsigned Reg);
  62
  63 // Return the given register as a GR64.
  64 inline unsigned getRegAsGR64(unsigned Reg) {
  65   return GR64Regs[getFirstReg(Reg)];
  66 }
  67
  68 // Return the given register as a low GR32.
  69 inline unsigned getRegAsGR32(unsigned Reg) {
  70   return GR32Regs[getFirstReg(Reg)];
  71 }
  72
  73 // Return the given register as a high GR32.
  74 inline unsigned getRegAsGRH32(unsigned Reg) {
  75   return GRH32Regs[getFirstReg(Reg)];
  76 }
  77
  78 // Return the given register as a VR128.
  79 inline unsigned getRegAsVR128(unsigned Reg) {
  80   return VR128Regs[getFirstReg(Reg)];
  81 }
  82 } // end namespace SystemZMC
  83
  84 MCCodeEmitter *createSystemZMCCodeEmitter(const MCInstrInfo &MCII,
  85                                           const MCRegisterInfo &MRI,
  86                                           MCContext &Ctx);
  87
  88 MCAsmBackend *createSystemZMCAsmBackend(const Target &T,
  89                                         const MCSubtargetInfo &STI,
  90                                         const MCRegisterInfo &MRI,
  91                                         const MCTargetOptions &Options);
  92
  93 std::unique_ptr<MCObjectTargetWriter> createSystemZObjectWriter(uint8_t OSABI);
  94 } // end namespace llvm
  95
  96 // Defines symbolic names for SystemZ registers.
  97 // This defines a mapping from register name to register number.
  98 #define GET_REGINFO_ENUM
  99 #include "SystemZGenRegisterInfo.inc"
 100
 101 // Defines symbolic names for the SystemZ instructions.
 102 #define GET_INSTRINFO_ENUM
 103 #include "SystemZGenInstrInfo.inc"
 104
 105 #define GET_SUBTARGETINFO_ENUM
 106 #include "SystemZGenSubtargetInfo.inc"
 107
 108 #endif