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