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//===-- RISCVISAInfo.h - RISC-V ISA Information -----------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_SUPPORT_RISCVISAINFO_H
#define LLVM_SUPPORT_RISCVISAINFO_H
#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/Error.h"
#include <map>
#include <string>
#include <vector>
namespace llvm {
void riscvExtensionsHelp(StringMap<StringRef> DescMap);
class RISCVISAInfo {
public:
RISCVISAInfo(const RISCVISAInfo &) = delete;
RISCVISAInfo &operator=(const RISCVISAInfo &) = delete;
/// Represents the major and version number components of a RISC-V extension.
struct ExtensionVersion {
unsigned Major;
unsigned Minor;
};
static bool compareExtension(const std::string &LHS, const std::string &RHS);
/// Helper class for OrderedExtensionMap.
struct ExtensionComparator {
bool operator()(const std::string &LHS, const std::string &RHS) const {
return compareExtension(LHS, RHS);
}
};
/// OrderedExtensionMap is std::map, it's specialized to keep entries
/// in canonical order of extension.
typedef std::map<std::string, ExtensionVersion, ExtensionComparator>
OrderedExtensionMap;
RISCVISAInfo(unsigned XLen, OrderedExtensionMap &Exts)
: XLen(XLen), FLen(0), MinVLen(0), MaxELen(0), MaxELenFp(0), Exts(Exts) {}
/// Parse RISC-V ISA info from arch string.
/// If IgnoreUnknown is set, any unrecognised extension names or
/// extensions with unrecognised versions will be silently dropped, except
/// for the special case of the base 'i' and 'e' extensions, where the
/// default version will be used (as ignoring the base is not possible).
static llvm::Expected<std::unique_ptr<RISCVISAInfo>>
parseArchString(StringRef Arch, bool EnableExperimentalExtension,
bool ExperimentalExtensionVersionCheck = true,
bool IgnoreUnknown = false);
/// Parse RISC-V ISA info from an arch string that is already in normalized
/// form (as defined in the psABI). Unlike parseArchString, this function
/// will not error for unrecognized extension names or extension versions.
static llvm::Expected<std::unique_ptr<RISCVISAInfo>>
parseNormalizedArchString(StringRef Arch);
/// Parse RISC-V ISA info from feature vector.
static llvm::Expected<std::unique_ptr<RISCVISAInfo>>
parseFeatures(unsigned XLen, const std::vector<std::string> &Features);
/// Convert RISC-V ISA info to a feature vector.
std::vector<std::string> toFeatures(bool AddAllExtensions = false,
bool IgnoreUnknown = true) const;
const OrderedExtensionMap &getExtensions() const { return Exts; }
unsigned getXLen() const { return XLen; }
unsigned getFLen() const { return FLen; }
unsigned getMinVLen() const { return MinVLen; }
unsigned getMaxVLen() const { return 65536; }
unsigned getMaxELen() const { return MaxELen; }
unsigned getMaxELenFp() const { return MaxELenFp; }
bool hasExtension(StringRef Ext) const;
std::string toString() const;
StringRef computeDefaultABI() const;
static bool isSupportedExtensionFeature(StringRef Ext);
static bool isSupportedExtension(StringRef Ext);
static bool isSupportedExtensionWithVersion(StringRef Ext);
static bool isSupportedExtension(StringRef Ext, unsigned MajorVersion,
unsigned MinorVersion);
static llvm::Expected<std::unique_ptr<RISCVISAInfo>>
postProcessAndChecking(std::unique_ptr<RISCVISAInfo> &&ISAInfo);
static std::string getTargetFeatureForExtension(StringRef Ext);
private:
RISCVISAInfo(unsigned XLen)
: XLen(XLen), FLen(0), MinVLen(0), MaxELen(0), MaxELenFp(0) {}
unsigned XLen;
unsigned FLen;
unsigned MinVLen;
unsigned MaxELen, MaxELenFp;
OrderedExtensionMap Exts;
void addExtension(StringRef ExtName, ExtensionVersion Version);
Error checkDependency();
void updateImplication();
void updateCombination();
void updateFLen();
void updateMinVLen();
void updateMaxELen();
};
} // namespace llvm
#endif
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