#ifndef LLVM_MC_SUBTARGETFEATURE_H
#define LLVM_MC_SUBTARGETFEATURE_H
-#include <string>
-#include <vector>
#include "llvm/ADT/Triple.h"
#include "llvm/Support/DataTypes.h"
+#include <vector>
namespace llvm {
class raw_ostream;
-
+ class StringRef;
+
//===----------------------------------------------------------------------===//
///
/// SubtargetFeatureKV - Used to provide key value pairs for feature and
const char *Desc; // Help descriptor
uint64_t Value; // K-V integer value
uint64_t Implies; // K-V bit mask
-
- // Compare routine for std binary search
- bool operator<(const SubtargetFeatureKV &S) const {
- return strcmp(Key, S.Key) < 0;
+
+ // Compare routine for std::lower_bound
+ bool operator<(StringRef S) const {
+ return StringRef(Key) < S;
}
};
-
+
//===----------------------------------------------------------------------===//
///
/// SubtargetInfoKV - Used to provide key value pairs for CPU and arbitrary
//
struct SubtargetInfoKV {
const char *Key; // K-V key string
- void *Value; // K-V pointer value
-
- // Compare routine for std binary search
- bool operator<(const SubtargetInfoKV &S) const {
- return strcmp(Key, S.Key) < 0;
+ const void *Value; // K-V pointer value
+
+ // Compare routine for std::lower_bound
+ bool operator<(StringRef S) const {
+ return StringRef(Key) < S;
}
};
-
+
//===----------------------------------------------------------------------===//
///
-/// SubtargetFeatures - Manages the enabling and disabling of subtarget
+/// SubtargetFeatures - Manages the enabling and disabling of subtarget
/// specific features. Features are encoded as a string of the form
-/// "cpu,+attr1,+attr2,-attr3,...,+attrN"
+/// "+attr1,+attr2,-attr3,...,+attrN"
/// A comma separates each feature from the next (all lowercase.)
-/// The first feature is always the CPU subtype (eg. pentiumm). If the CPU
-/// value is "generic" then the CPU subtype should be generic for the target.
/// Each of the remaining features is prefixed with + or - indicating whether
/// that feature should be enabled or disabled contrary to the cpu
/// specification.
class SubtargetFeatures {
std::vector<std::string> Features; // Subtarget features as a vector
public:
- explicit SubtargetFeatures(const std::string &Initial = std::string());
+ explicit SubtargetFeatures(const StringRef Initial = "");
/// Features string accessors.
std::string getString() const;
- void setString(const std::string &Initial);
/// Adding Features.
- void AddFeature(const std::string &String, bool IsEnabled = true);
-
+ void AddFeature(const StringRef String, bool IsEnabled = true);
+
+ /// ToggleFeature - Toggle a feature and returns the newly updated feature
+ /// bits.
+ uint64_t ToggleFeature(uint64_t Bits, const StringRef String,
+ const SubtargetFeatureKV *FeatureTable,
+ size_t FeatureTableSize);
+
/// Get feature bits of a CPU.
- uint64_t getFeatureBits(const std::string &CPU,
+ uint64_t getFeatureBits(const StringRef CPU,
const SubtargetFeatureKV *CPUTable,
size_t CPUTableSize,
const SubtargetFeatureKV *FeatureTable,
size_t FeatureTableSize);
-
- /// Get scheduling itinerary of a CPU.
- void *getItinerary(const std::string &CPU,
- const SubtargetInfoKV *Table, size_t TableSize);
-
+
/// Print feature string.
void print(raw_ostream &OS) const;
-
+
// Dump feature info.
void dump() const;
- /// Retrieve a formatted string of the default features for the specified
- /// target triple.
+ /// Adds the default features for the specified target triple.
void getDefaultSubtargetFeatures(const Triple& Triple);
};