/usr/include/llvm-3.5/llvm/MC/SubtargetFeature.h is in llvm-3.5-dev 1:3.5~svn201651-1ubuntu1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 | //===-- llvm/MC/SubtargetFeature.h - CPU characteristics --------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines and manages user or tool specified CPU characteristics.
// The intent is to be able to package specific features that should or should
// not be used on a specific target processor. A tool, such as llc, could, as
// as example, gather chip info from the command line, a long with features
// that should be used on that chip.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_MC_SUBTARGETFEATURE_H
#define LLVM_MC_SUBTARGETFEATURE_H
#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
/// CPU bit flags.
//
struct SubtargetFeatureKV {
const char *Key; // K-V key string
const char *Desc; // Help descriptor
uint64_t Value; // K-V integer value
uint64_t Implies; // K-V bit mask
// 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
/// pointers.
//
struct SubtargetInfoKV {
const char *Key; // K-V key string
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
/// specific features. Features are encoded as a string of the form
/// "+attr1,+attr2,-attr3,...,+attrN"
/// A comma separates each feature from the next (all lowercase.)
/// 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 StringRef Initial = "");
/// Features string accessors.
std::string getString() const;
/// Adding Features.
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 StringRef CPU,
const SubtargetFeatureKV *CPUTable,
size_t CPUTableSize,
const SubtargetFeatureKV *FeatureTable,
size_t FeatureTableSize);
/// Print feature string.
void print(raw_ostream &OS) const;
// Dump feature info.
void dump() const;
/// Adds the default features for the specified target triple.
void getDefaultSubtargetFeatures(const Triple& Triple);
};
} // End namespace llvm
#endif
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