mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-24 19:52:54 +01:00
75 lines
2.3 KiB
C++
75 lines
2.3 KiB
C++
//===--------------------- llvm/Target/TargetRecip.h ------------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This class is used to customize machine-specific reciprocal estimate code
|
|
// generation in a target-independent way.
|
|
// If a target does not support operations in this specification, then code
|
|
// generation will default to using supported operations.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_TARGET_TARGETRECIP_H
|
|
#define LLVM_TARGET_TARGETRECIP_H
|
|
|
|
#include "llvm/ADT/StringRef.h"
|
|
#include <cstdint>
|
|
#include <map>
|
|
#include <string>
|
|
#include <vector>
|
|
|
|
namespace llvm {
|
|
|
|
struct TargetRecip {
|
|
public:
|
|
TargetRecip();
|
|
|
|
/// Initialize all or part of the operations from command-line options or
|
|
/// a front end.
|
|
TargetRecip(const std::vector<std::string> &Args);
|
|
|
|
/// Set whether a particular reciprocal operation is enabled and how many
|
|
/// refinement steps are needed when using it. Use "all" to set enablement
|
|
/// and refinement steps for all operations.
|
|
void setDefaults(StringRef Key, bool Enable, unsigned RefSteps);
|
|
|
|
/// Return true if the reciprocal operation has been enabled by default or
|
|
/// from the command-line. Return false if the operation has been disabled
|
|
/// by default or from the command-line.
|
|
bool isEnabled(StringRef Key) const;
|
|
|
|
/// Return the number of iterations necessary to refine the
|
|
/// the result of a machine instruction for the given reciprocal operation.
|
|
unsigned getRefinementSteps(StringRef Key) const;
|
|
|
|
bool operator==(const TargetRecip &Other) const;
|
|
|
|
private:
|
|
enum {
|
|
Uninitialized = -1
|
|
};
|
|
|
|
struct RecipParams {
|
|
int8_t Enabled;
|
|
int8_t RefinementSteps;
|
|
|
|
RecipParams() : Enabled(Uninitialized), RefinementSteps(Uninitialized) {}
|
|
};
|
|
|
|
std::map<StringRef, RecipParams> RecipMap;
|
|
typedef std::map<StringRef, RecipParams>::iterator RecipIter;
|
|
typedef std::map<StringRef, RecipParams>::const_iterator ConstRecipIter;
|
|
|
|
bool parseGlobalParams(const std::string &Arg);
|
|
void parseIndividualParams(const std::vector<std::string> &Args);
|
|
};
|
|
|
|
} // end namespace llvm
|
|
|
|
#endif // LLVM_TARGET_TARGETRECIP_H
|