1 //===-- ARMMCTargetDesc.cpp - ARM Target Descriptions -----------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file provides ARM specific target descriptions.
12 //===----------------------------------------------------------------------===//
14 #include "ARMMCTargetDesc.h"
15 #include "llvm/MC/MCInstrInfo.h"
16 #include "llvm/MC/MCRegisterInfo.h"
17 #include "llvm/MC/MCSubtargetInfo.h"
18 #include "llvm/Target/TargetRegistry.h"
20 #define GET_REGINFO_MC_DESC
21 #include "ARMGenRegisterInfo.inc"
23 #define GET_INSTRINFO_MC_DESC
24 #include "ARMGenInstrInfo.inc"
26 #define GET_SUBTARGETINFO_MC_DESC
27 #include "ARMGenSubtargetInfo.inc"
31 MCInstrInfo *createARMMCInstrInfo() {
32 MCInstrInfo *X = new MCInstrInfo();
33 InitARMMCInstrInfo(X);
37 MCRegisterInfo *createARMMCRegisterInfo() {
38 MCRegisterInfo *X = new MCRegisterInfo();
39 InitARMMCRegisterInfo(X);
43 MCSubtargetInfo *createARMMCSubtargetInfo(StringRef TT, StringRef CPU,
45 std::string ArchFS = ARM_MC::ParseARMTriple(TT);
48 ArchFS = ArchFS + "," + FS.str();
53 MCSubtargetInfo *X = new MCSubtargetInfo();
54 InitARMMCSubtargetInfo(X, CPU, ArchFS);
58 // Force static initialization.
59 extern "C" void LLVMInitializeARMMCInstrInfo() {
60 RegisterMCInstrInfo<MCInstrInfo> X(TheARMTarget);
61 RegisterMCInstrInfo<MCInstrInfo> Y(TheThumbTarget);
63 TargetRegistry::RegisterMCInstrInfo(TheARMTarget, createARMMCInstrInfo);
64 TargetRegistry::RegisterMCInstrInfo(TheThumbTarget, createARMMCInstrInfo);
67 extern "C" void LLVMInitializeARMMCRegInfo() {
68 RegisterMCRegInfo<MCRegisterInfo> X(TheARMTarget);
69 RegisterMCRegInfo<MCRegisterInfo> Y(TheThumbTarget);
71 TargetRegistry::RegisterMCRegInfo(TheARMTarget, createARMMCRegisterInfo);
72 TargetRegistry::RegisterMCRegInfo(TheThumbTarget, createARMMCRegisterInfo);
75 extern "C" void LLVMInitializeARMMCSubtargetInfo() {
76 RegisterMCSubtargetInfo<MCSubtargetInfo> X(TheARMTarget);
77 RegisterMCSubtargetInfo<MCSubtargetInfo> Y(TheThumbTarget);
79 TargetRegistry::RegisterMCSubtargetInfo(TheARMTarget,
80 createARMMCSubtargetInfo);
81 TargetRegistry::RegisterMCSubtargetInfo(TheThumbTarget,
82 createARMMCSubtargetInfo);
85 std::string ARM_MC::ParseARMTriple(StringRef TT) {
86 // Set the boolean corresponding to the current target triple, or the default
87 // if one cannot be determined, to true.
88 unsigned Len = TT.size();
92 if (Len >= 5 && TT.substr(0, 4) == "armv")
94 else if (Len >= 6 && TT.substr(0, 5) == "thumb") {
96 if (Len >= 7 && TT[5] == 'v')
100 std::string ARMArchFeature;
102 unsigned SubVer = TT[Idx];
103 if (SubVer >= '7' && SubVer <= '9') {
104 if (Len >= Idx+2 && TT[Idx+1] == 'm') {
105 // v7m: FeatureNoARM, FeatureDB, FeatureHWDiv
106 ARMArchFeature = "+v7,+noarm,+db,+hwdiv";
107 } else if (Len >= Idx+3 && TT[Idx+1] == 'e'&& TT[Idx+2] == 'm') {
108 // v7em: FeatureNoARM, FeatureDB, FeatureHWDiv, FeatureDSPThumb2,
110 ARMArchFeature = "+v7,+noarm,+db,+hwdiv,+t2dsp,t2xtpk";
112 // v7a: FeatureNEON, FeatureDB, FeatureDSPThumb2
113 ARMArchFeature = "+v7,+neon,+db,+t2dsp";
114 } else if (SubVer == '6') {
115 if (Len >= Idx+3 && TT[Idx+1] == 't' && TT[Idx+2] == '2')
116 ARMArchFeature = "+v6t2";
118 ARMArchFeature = "+v6";
119 } else if (SubVer == '5') {
120 if (Len >= Idx+3 && TT[Idx+1] == 't' && TT[Idx+2] == 'e')
121 ARMArchFeature = "+v5te";
123 ARMArchFeature = "+v5t";
124 } else if (SubVer == '4' && Len >= Idx+2 && TT[Idx+1] == 't')
125 ARMArchFeature = "+v4t";
129 if (ARMArchFeature.empty())
130 ARMArchFeature = "+thumb";
132 ARMArchFeature += ",+thumb";
135 return ARMArchFeature;