| //===-- X86InstrBuilder.h - Functions to aid building x86 insts -*- C++ -*-===// |
| // |
| // This file exposes functions that may be used with BuildMI from the |
| // MachineInstrBuilder.h file to handle X86'isms in a clean way. |
| // |
| // The BuildMem function may be used with the BuildMI function to add entire |
| // memory references in a single, typed, function call. X86 memory references |
| // can be very complex expressions (described in the README), so wrapping them |
| // up behind an easier to use interface makes sense. Descriptions of the |
| // functions are included below. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef X86INSTRBUILDER_H |
| #define X86INSTRBUILDER_H |
| |
| #include "llvm/CodeGen/MachineInstrBuilder.h" |
| |
| /// addDirectMem - This function is used to add a direct memory reference to the |
| /// current instruction. Because memory references are always represented with |
| /// four values, this adds: Reg, [1, NoReg, 0] to the instruction |
| /// |
| inline const MachineInstrBuilder &addDirectMem(const MachineInstrBuilder &MIB, |
| unsigned Reg) { |
| return MIB.addReg(Reg).addZImm(1).addMReg(0).addSImm(0); |
| } |
| |
| |
| /// addRegOffset - |
| /// |
| /// |
| inline const MachineInstrBuilder &addRegOffset(const MachineInstrBuilder &MIB, |
| unsigned Reg, unsigned Offset) { |
| return MIB.addReg(Reg).addZImm(1).addMReg(0).addSImm(Offset); |
| } |
| |
| #endif |