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| Rev | Author | Line No. | Line |
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| 14 | pmbaty | 1 | //===-- RISCVISAInfo.h - RISCV ISA Information ------------------*- C++ -*-===// |
| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |||
| 9 | #ifndef LLVM_SUPPORT_RISCVISAINFO_H |
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| 10 | #define LLVM_SUPPORT_RISCVISAINFO_H |
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| 11 | |||
| 12 | #include "llvm/ADT/StringRef.h" |
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| 13 | #include "llvm/Support/Error.h" |
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| 14 | |||
| 15 | #include <map> |
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| 16 | #include <string> |
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| 17 | #include <vector> |
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| 18 | |||
| 19 | namespace llvm { |
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| 20 | struct RISCVExtensionInfo { |
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| 21 | std::string ExtName; |
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| 22 | unsigned MajorVersion; |
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| 23 | unsigned MinorVersion; |
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| 24 | }; |
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| 25 | |||
| 26 | class RISCVISAInfo { |
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| 27 | public: |
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| 28 | RISCVISAInfo(const RISCVISAInfo &) = delete; |
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| 29 | RISCVISAInfo &operator=(const RISCVISAInfo &) = delete; |
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| 30 | |||
| 31 | static bool compareExtension(const std::string &LHS, const std::string &RHS); |
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| 32 | |||
| 33 | /// Helper class for OrderedExtensionMap. |
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| 34 | struct ExtensionComparator { |
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| 35 | bool operator()(const std::string &LHS, const std::string &RHS) const { |
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| 36 | return compareExtension(LHS, RHS); |
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| 37 | } |
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| 38 | }; |
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| 39 | |||
| 40 | /// OrderedExtensionMap is std::map, it's specialized to keep entries |
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| 41 | /// in canonical order of extension. |
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| 42 | typedef std::map<std::string, RISCVExtensionInfo, ExtensionComparator> |
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| 43 | OrderedExtensionMap; |
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| 44 | |||
| 45 | RISCVISAInfo(unsigned XLen, OrderedExtensionMap &Exts) |
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| 46 | : XLen(XLen), FLen(0), MinVLen(0), MaxELen(0), MaxELenFp(0), Exts(Exts) {} |
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| 47 | |||
| 48 | /// Parse RISCV ISA info from arch string. |
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| 49 | static llvm::Expected<std::unique_ptr<RISCVISAInfo>> |
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| 50 | parseArchString(StringRef Arch, bool EnableExperimentalExtension, |
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| 51 | bool ExperimentalExtensionVersionCheck = true, |
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| 52 | bool IgnoreUnknown = false); |
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| 53 | |||
| 54 | /// Parse RISCV ISA info from an arch string that is already in normalized |
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| 55 | /// form (as defined in the psABI). Unlike parseArchString, this function |
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| 56 | /// will not error for unrecognized extension names or extension versions. |
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| 57 | static llvm::Expected<std::unique_ptr<RISCVISAInfo>> |
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| 58 | parseNormalizedArchString(StringRef Arch); |
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| 59 | |||
| 60 | /// Parse RISCV ISA info from feature vector. |
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| 61 | static llvm::Expected<std::unique_ptr<RISCVISAInfo>> |
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| 62 | parseFeatures(unsigned XLen, const std::vector<std::string> &Features); |
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| 63 | |||
| 64 | /// Convert RISCV ISA info to a feature vector. |
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| 65 | void toFeatures(std::vector<StringRef> &Features, |
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| 66 | llvm::function_ref<StringRef(const Twine &)> StrAlloc, |
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| 67 | bool AddAllExtensions) const; |
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| 68 | |||
| 69 | const OrderedExtensionMap &getExtensions() const { return Exts; }; |
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| 70 | |||
| 71 | unsigned getXLen() const { return XLen; }; |
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| 72 | unsigned getFLen() const { return FLen; }; |
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| 73 | unsigned getMinVLen() const { return MinVLen; } |
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| 74 | unsigned getMaxVLen() const { return 65536; } |
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| 75 | unsigned getMaxELen() const { return MaxELen; } |
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| 76 | unsigned getMaxELenFp() const { return MaxELenFp; } |
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| 77 | |||
| 78 | bool hasExtension(StringRef Ext) const; |
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| 79 | std::string toString() const; |
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| 80 | std::vector<std::string> toFeatureVector() const; |
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| 81 | StringRef computeDefaultABI() const; |
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| 82 | |||
| 83 | static bool isSupportedExtensionFeature(StringRef Ext); |
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| 84 | static bool isSupportedExtension(StringRef Ext); |
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| 85 | static bool isSupportedExtension(StringRef Ext, unsigned MajorVersion, |
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| 86 | unsigned MinorVersion); |
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| 87 | static llvm::Expected<std::unique_ptr<RISCVISAInfo>> |
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| 88 | postProcessAndChecking(std::unique_ptr<RISCVISAInfo> &&ISAInfo); |
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| 89 | |||
| 90 | private: |
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| 91 | RISCVISAInfo(unsigned XLen) |
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| 92 | : XLen(XLen), FLen(0), MinVLen(0), MaxELen(0), MaxELenFp(0) {} |
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| 93 | |||
| 94 | unsigned XLen; |
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| 95 | unsigned FLen; |
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| 96 | unsigned MinVLen; |
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| 97 | unsigned MaxELen, MaxELenFp; |
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| 98 | |||
| 99 | OrderedExtensionMap Exts; |
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| 100 | |||
| 101 | void addExtension(StringRef ExtName, unsigned MajorVersion, |
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| 102 | unsigned MinorVersion); |
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| 103 | |||
| 104 | Error checkDependency(); |
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| 105 | |||
| 106 | void updateImplication(); |
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| 107 | void updateCombination(); |
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| 108 | void updateFLen(); |
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| 109 | void updateMinVLen(); |
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| 110 | void updateMaxELen(); |
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| 111 | }; |
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| 112 | |||
| 113 | } // namespace llvm |
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| 114 | |||
| 115 | #endif |