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//===-- ARMMCTargetDesc.cpp - ARM Target Descriptions -----------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file provides ARM specific target descriptions.
//
//===----------------------------------------------------------------------===//
#include "ARMMCTargetDesc.h"
#include "llvm/MC/MCInstrInfo.h"
#include "llvm/MC/MCRegisterInfo.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/Target/TargetRegistry.h"
#define GET_REGINFO_MC_DESC
#include "ARMGenRegisterInfo.inc"
#define GET_INSTRINFO_MC_DESC
#include "ARMGenInstrInfo.inc"
#define GET_SUBTARGETINFO_ENUM
#define GET_SUBTARGETINFO_MC_DESC
#include "ARMGenSubtargetInfo.inc"
using namespace llvm;
std::string ARM_MC::ParseARMTriple(StringRef TT) {
// Set the boolean corresponding to the current target triple, or the default
// if one cannot be determined, to true.
unsigned Len = TT.size();
unsigned Idx = 0;
// FIXME: Enahnce Triple helper class to extract ARM version.
bool isThumb = false;
if (Len >= 5 && TT.substr(0, 4) == "armv")
Idx = 4;
else if (Len >= 6 && TT.substr(0, 5) == "thumb") {
isThumb = true;
if (Len >= 7 && TT[5] == 'v')
Idx = 6;
}
std::string ARMArchFeature;
if (Idx) {
unsigned SubVer = TT[Idx];
if (SubVer >= '7' && SubVer <= '9') {
if (Len >= Idx+2 && TT[Idx+1] == 'm') {
// v7m: FeatureNoARM, FeatureDB, FeatureHWDiv
ARMArchFeature = "+v7,+noarm,+db,+hwdiv";
} else if (Len >= Idx+3 && TT[Idx+1] == 'e'&& TT[Idx+2] == 'm') {
// v7em: FeatureNoARM, FeatureDB, FeatureHWDiv, FeatureDSPThumb2,
// FeatureT2XtPk
ARMArchFeature = "+v7,+noarm,+db,+hwdiv,+t2dsp,t2xtpk";
} else
// v7a: FeatureNEON, FeatureDB, FeatureDSPThumb2
ARMArchFeature = "+v7,+neon,+db,+t2dsp";
} else if (SubVer == '6') {
if (Len >= Idx+3 && TT[Idx+1] == 't' && TT[Idx+2] == '2')
ARMArchFeature = "+v6t2";
else
ARMArchFeature = "+v6";
} else if (SubVer == '5') {
if (Len >= Idx+3 && TT[Idx+1] == 't' && TT[Idx+2] == 'e')
ARMArchFeature = "+v5te";
else
ARMArchFeature = "+v5t";
} else if (SubVer == '4' && Len >= Idx+2 && TT[Idx+1] == 't')
ARMArchFeature = "+v4t";
}
if (isThumb) {
if (ARMArchFeature.empty())
ARMArchFeature = "+thumb-mode";
else
ARMArchFeature += ",+thumb-mode";
}
return ARMArchFeature;
}
MCSubtargetInfo *ARM_MC::createARMMCSubtargetInfo(StringRef TT, StringRef CPU,
StringRef FS) {
std::string ArchFS = ARM_MC::ParseARMTriple(TT);
if (!FS.empty()) {
if (!ArchFS.empty())
ArchFS = ArchFS + "," + FS.str();
else
ArchFS = FS;
}
MCSubtargetInfo *X = new MCSubtargetInfo();
InitARMMCSubtargetInfo(X, CPU, ArchFS);
return X;
}
MCInstrInfo *createARMMCInstrInfo() {
MCInstrInfo *X = new MCInstrInfo();
InitARMMCInstrInfo(X);
return X;
}
MCRegisterInfo *createARMMCRegisterInfo() {
MCRegisterInfo *X = new MCRegisterInfo();
InitARMMCRegisterInfo(X);
return X;
}
// Force static initialization.
extern "C" void LLVMInitializeARMMCInstrInfo() {
RegisterMCInstrInfo<MCInstrInfo> X(TheARMTarget);
RegisterMCInstrInfo<MCInstrInfo> Y(TheThumbTarget);
TargetRegistry::RegisterMCInstrInfo(TheARMTarget, createARMMCInstrInfo);
TargetRegistry::RegisterMCInstrInfo(TheThumbTarget, createARMMCInstrInfo);
}
extern "C" void LLVMInitializeARMMCRegInfo() {
RegisterMCRegInfo<MCRegisterInfo> X(TheARMTarget);
RegisterMCRegInfo<MCRegisterInfo> Y(TheThumbTarget);
TargetRegistry::RegisterMCRegInfo(TheARMTarget, createARMMCRegisterInfo);
TargetRegistry::RegisterMCRegInfo(TheThumbTarget, createARMMCRegisterInfo);
}
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