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() {
44 MCSubtargetInfo *X = new MCSubtargetInfo();
45 InitARMMCSubtargetInfo(X);
49 // Force static initialization.
50 extern "C" void LLVMInitializeARMMCInstrInfo() {
51 RegisterMCInstrInfo<MCInstrInfo> X(TheARMTarget);
52 RegisterMCInstrInfo<MCInstrInfo> Y(TheThumbTarget);
54 TargetRegistry::RegisterMCInstrInfo(TheARMTarget, createARMMCInstrInfo);
55 TargetRegistry::RegisterMCInstrInfo(TheThumbTarget, createARMMCInstrInfo);
58 extern "C" void LLVMInitializeARMMCRegInfo() {
59 RegisterMCRegInfo<MCRegisterInfo> X(TheARMTarget);
60 RegisterMCRegInfo<MCRegisterInfo> Y(TheThumbTarget);
62 TargetRegistry::RegisterMCRegInfo(TheARMTarget, createARMMCRegisterInfo);
63 TargetRegistry::RegisterMCRegInfo(TheThumbTarget, createARMMCRegisterInfo);
66 extern "C" void LLVMInitializeARMMCSubtargetInfo() {
67 RegisterMCSubtargetInfo<MCSubtargetInfo> X(TheARMTarget);
68 RegisterMCSubtargetInfo<MCSubtargetInfo> Y(TheThumbTarget);
70 TargetRegistry::RegisterMCSubtargetInfo(TheARMTarget,
71 createARMMCSubtargetInfo);
72 TargetRegistry::RegisterMCSubtargetInfo(TheThumbTarget,
73 createARMMCSubtargetInfo);
76 std::string ARM_MC::ParseARMTriple(StringRef TT, bool &IsThumb) {
77 // Set the boolean corresponding to the current target triple, or the default
78 // if one cannot be determined, to true.
79 unsigned Len = TT.size();
82 if (Len >= 5 && TT.substr(0, 4) == "armv")
84 else if (Len >= 6 && TT.substr(0, 5) == "thumb") {
86 if (Len >= 7 && TT[5] == 'v')
90 std::string ARMArchFeature;
92 unsigned SubVer = TT[Idx];
93 if (SubVer >= '7' && SubVer <= '9') {
94 if (Len >= Idx+2 && TT[Idx+1] == 'm') {
95 // v7m: FeatureNoARM, FeatureDB, FeatureHWDiv
96 ARMArchFeature = "+v7,+noarm,+db,+hwdiv";
97 } else if (Len >= Idx+3 && TT[Idx+1] == 'e'&& TT[Idx+2] == 'm') {
98 // v7em: FeatureNoARM, FeatureDB, FeatureHWDiv, FeatureDSPThumb2,
100 ARMArchFeature = "+v7,+noarm,+db,+hwdiv,+t2dsp,t2xtpk";
102 // v7a: FeatureNEON, FeatureDB, FeatureDSPThumb2
103 ARMArchFeature = "+v7,+neon,+db,+t2dsp";
104 } else if (SubVer == '6') {
105 if (Len >= Idx+3 && TT[Idx+1] == 't' && TT[Idx+2] == '2')
106 ARMArchFeature = "+v6t2";
108 ARMArchFeature = "+v6";
109 } else if (SubVer == '5') {
110 if (Len >= Idx+3 && TT[Idx+1] == 't' && TT[Idx+2] == 'e')
111 ARMArchFeature = "+v5te";
113 ARMArchFeature = "+v5t";
114 } else if (SubVer == '4' && Len >= Idx+2 && TT[Idx+1] == 't')
115 ARMArchFeature = "+v4t";
118 return ARMArchFeature;