Factor ARM triple parsing out of ARMSubtarget. Another step towards making ARM subtarget info available to MC.
llvm-svn: 134569
diff --git a/llvm/lib/Target/ARM/MCTargetDesc/ARMMCTargetDesc.cpp b/llvm/lib/Target/ARM/MCTargetDesc/ARMMCTargetDesc.cpp
index 198c25d..f2b6d25 100644
--- a/llvm/lib/Target/ARM/MCTargetDesc/ARMMCTargetDesc.cpp
+++ b/llvm/lib/Target/ARM/MCTargetDesc/ARMMCTargetDesc.cpp
@@ -72,3 +72,49 @@
TargetRegistry::RegisterMCSubtargetInfo(TheThumbTarget,
createARMMCSubtargetInfo);
}
+
+std::string ARM_MC::ParseARMTriple(StringRef TT, bool &IsThumb) {
+ // 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;
+
+ 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') {
+ ARMArchFeature = "+v7a";
+ if (Len >= Idx+2 && TT[Idx+1] == 'm') {
+ ARMArchFeature = "+v7m";
+ } else if (Len >= Idx+3 && TT[Idx+1] == 'e'&& TT[Idx+2] == 'm') {
+ ARMArchFeature = "+v7em";
+ }
+ } else if (SubVer == '6') {
+ ARMArchFeature = "+v6";
+ if (Len >= Idx+3 && TT[Idx+1] == 't' && TT[Idx+2] == '2') {
+ ARMArchFeature = "+v6t2";
+ }
+ } else if (SubVer == '5') {
+ ARMArchFeature = "+v5t";
+ if (Len >= Idx+3 && TT[Idx+1] == 't' && TT[Idx+2] == 'e') {
+ ARMArchFeature = "+v5te";
+ }
+ } else if (SubVer == '4') {
+ if (Len >= Idx+2 && TT[Idx+1] == 't') {
+ ARMArchFeature = "+v4t";
+ } else {
+ ARMArchFeature = "";
+ }
+ }
+ }
+
+ return ARMArchFeature;
+}