//===----------------------------------------------------------------------===//
#include "llvm/MC/SubtargetFeature.h"
+#include "llvm/ADT/StringExtras.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/raw_ostream.h"
V.assign(Tmp.begin(), Tmp.end());
}
-/// Join a vector of strings to a string with a comma separating each element.
-///
-static std::string Join(const std::vector<std::string> &V) {
- // Start with empty string.
- std::string Result;
- // If the vector is not empty
- if (!V.empty()) {
- // Start with the first feature
- Result = V[0];
- // For each successive feature
- for (size_t i = 1; i < V.size(); i++) {
- // Add a comma
- Result += ",";
- // Add the feature
- Result += V[i];
- }
- }
- // Return the features string
- return Result;
-}
-
/// Adding features.
-void SubtargetFeatures::AddFeature(StringRef String) {
- // Don't add empty features or features we already have.
+void SubtargetFeatures::AddFeature(StringRef String, bool Enable) {
+ // Don't add empty features.
if (!String.empty())
// Convert to lowercase, prepend flag if we don't already have a flag.
- Features.push_back(hasFlag(String) ? String.str() : "+" + String.lower());
+ Features.push_back(hasFlag(String) ? String.lower()
+ : (Enable ? "+" : "-") + String.lower());
}
/// Find KV in array using binary search.
std::string SubtargetFeatures::getString() const {
- return Join(Features);
+ return join(Features.begin(), Features.end(), ",");
}
/// SetImpliedBits - For each feature that is (transitively) implied by this
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.
///
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;