[ARM] Add knowledge of FPU subtarget features to TargetParser
Add getFPUFeatures to TargetParser, which gets the list of subtarget features
that are enabled/disabled for each FPU, and use it when handling the .fpu
directive.
No functional change in this commit, though clang will start behaving
differently once it starts using this.
Differential Revision: http://reviews.llvm.org/D10237
llvm-svn: 239150
diff --git a/llvm/lib/MC/SubtargetFeature.cpp b/llvm/lib/MC/SubtargetFeature.cpp
index e976a50..76574e9 100644
--- a/llvm/lib/MC/SubtargetFeature.cpp
+++ b/llvm/lib/MC/SubtargetFeature.cpp
@@ -190,6 +190,38 @@
return Bits;
}
+FeatureBitset
+SubtargetFeatures::ApplyFeatureFlag(FeatureBitset Bits, StringRef Feature,
+ ArrayRef<SubtargetFeatureKV> FeatureTable) {
+
+ assert(hasFlag(Feature));
+
+ // Find feature in table.
+ const SubtargetFeatureKV *FeatureEntry =
+ Find(StripFlag(Feature), FeatureTable);
+ // If there is a match
+ if (FeatureEntry) {
+ // Enable/disable feature in bits
+ if (isEnabled(Feature)) {
+ Bits |= FeatureEntry->Value;
+
+ // For each feature that this implies, set it.
+ SetImpliedBits(Bits, FeatureEntry, FeatureTable);
+ } else {
+ Bits &= ~FeatureEntry->Value;
+
+ // For each feature that implies this, clear it.
+ ClearImpliedBits(Bits, FeatureEntry, FeatureTable);
+ }
+ } else {
+ errs() << "'" << Feature
+ << "' is not a recognized feature for this target"
+ << " (ignoring feature)\n";
+ }
+
+ return Bits;
+}
+
/// getFeatureBits - Get feature bits a CPU.
///
@@ -245,28 +277,7 @@
if (Feature == "+help")
Help(CPUTable, FeatureTable);
- // Find feature in table.
- const SubtargetFeatureKV *FeatureEntry =
- Find(StripFlag(Feature), FeatureTable);
- // If there is a match
- if (FeatureEntry) {
- // Enable/disable feature in bits
- if (isEnabled(Feature)) {
- Bits |= FeatureEntry->Value;
-
- // For each feature that this implies, set it.
- SetImpliedBits(Bits, FeatureEntry, FeatureTable);
- } else {
- Bits &= ~FeatureEntry->Value;
-
- // For each feature that implies this, clear it.
- ClearImpliedBits(Bits, FeatureEntry, FeatureTable);
- }
- } else {
- errs() << "'" << Feature
- << "' is not a recognized feature for this target"
- << " (ignoring feature)\n";
- }
+ Bits = ApplyFeatureFlag(Bits, Feature, FeatureTable);
}
return Bits;