llvm-project/llvm/lib/Target/Mips/MCTargetDesc/MipsABIInfo.cpp

120 lines
3.3 KiB
C++

//===---- MipsABIInfo.cpp - Information about MIPS ABI's ------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "MipsABIInfo.h"
#include "MipsRegisterInfo.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/MC/MCTargetOptions.h"
using namespace llvm;
namespace {
static const MCPhysReg O32IntRegs[4] = {Mips::A0, Mips::A1, Mips::A2, Mips::A3};
static const MCPhysReg Mips64IntRegs[8] = {
Mips::A0_64, Mips::A1_64, Mips::A2_64, Mips::A3_64,
Mips::T0_64, Mips::T1_64, Mips::T2_64, Mips::T3_64};
}
ArrayRef<MCPhysReg> MipsABIInfo::GetByValArgRegs() const {
if (IsO32())
return makeArrayRef(O32IntRegs);
if (IsN32() || IsN64())
return makeArrayRef(Mips64IntRegs);
llvm_unreachable("Unhandled ABI");
}
ArrayRef<MCPhysReg> MipsABIInfo::GetVarArgRegs() const {
if (IsO32())
return makeArrayRef(O32IntRegs);
if (IsN32() || IsN64())
return makeArrayRef(Mips64IntRegs);
llvm_unreachable("Unhandled ABI");
}
unsigned MipsABIInfo::GetCalleeAllocdArgSizeInBytes(CallingConv::ID CC) const {
if (IsO32())
return CC != CallingConv::Fast ? 16 : 0;
if (IsN32() || IsN64())
return 0;
llvm_unreachable("Unhandled ABI");
}
MipsABIInfo MipsABIInfo::computeTargetABI(const Triple &TT, StringRef CPU,
const MCTargetOptions &Options) {
if (Options.getABIName().startswith("o32"))
return MipsABIInfo::O32();
if (Options.getABIName().startswith("n32"))
return MipsABIInfo::N32();
if (Options.getABIName().startswith("n64"))
return MipsABIInfo::N64();
assert(Options.getABIName().empty() && "Unknown ABI option for MIPS");
if (TT.getArch() == Triple::mips64 || TT.getArch() == Triple::mips64el)
return MipsABIInfo::N64();
return MipsABIInfo::O32();
}
unsigned MipsABIInfo::GetStackPtr() const {
return ArePtrs64bit() ? Mips::SP_64 : Mips::SP;
}
unsigned MipsABIInfo::GetFramePtr() const {
return ArePtrs64bit() ? Mips::FP_64 : Mips::FP;
}
unsigned MipsABIInfo::GetBasePtr() const {
return ArePtrs64bit() ? Mips::S7_64 : Mips::S7;
}
unsigned MipsABIInfo::GetGlobalPtr() const {
return ArePtrs64bit() ? Mips::GP_64 : Mips::GP;
}
unsigned MipsABIInfo::GetNullPtr() const {
return ArePtrs64bit() ? Mips::ZERO_64 : Mips::ZERO;
}
unsigned MipsABIInfo::GetZeroReg() const {
return AreGprs64bit() ? Mips::ZERO_64 : Mips::ZERO;
}
unsigned MipsABIInfo::GetPtrAdduOp() const {
return ArePtrs64bit() ? Mips::DADDu : Mips::ADDu;
}
unsigned MipsABIInfo::GetPtrAddiuOp() const {
return ArePtrs64bit() ? Mips::DADDiu : Mips::ADDiu;
}
unsigned MipsABIInfo::GetPtrSubuOp() const {
return ArePtrs64bit() ? Mips::DSUBu : Mips::SUBu;
}
unsigned MipsABIInfo::GetPtrAndOp() const {
return ArePtrs64bit() ? Mips::AND64 : Mips::AND;
}
unsigned MipsABIInfo::GetGPRMoveOp() const {
return ArePtrs64bit() ? Mips::OR64 : Mips::OR;
}
unsigned MipsABIInfo::GetEhDataReg(unsigned I) const {
static const unsigned EhDataReg[] = {
Mips::A0, Mips::A1, Mips::A2, Mips::A3
};
static const unsigned EhDataReg64[] = {
Mips::A0_64, Mips::A1_64, Mips::A2_64, Mips::A3_64
};
return IsN64() ? EhDataReg64[I] : EhDataReg[I];
}