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5a3180dd84
Summary: Using c++11 enum classes ensures that only valid enum values are used for ArchKind, ProfileKind, VersionKind and ISAKind. This removes the need for checks that the provided values map to a proper enum value, allows us to get rid of AK_LAST and prevents comparing values from different enums. It also removes a bunch of static_cast from unsigned to enum values and vice versa, at the cost of introducing static casts to access AArch64ARCHNames and ARMARCHNames by ArchKind. FPUKind and ArchExtKind are the only remaining old-style enum in TargetParser.h. I think it's beneficial to keep ArchExtKind as old-style enum, but FPUKind can be converted too, but this patch is quite big, so could do this in a follow-up patch. I could also split this patch up a bit, if people would prefer that. Reviewers: rengolin, javed.absar, chandlerc, rovka Reviewed By: rovka Subscribers: aemerson, kristof.beyls, llvm-commits Differential Revision: https://reviews.llvm.org/D35882 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@309287 91177308-0d34-0410-b5e6-96231b3b80d8
213 lines
6.2 KiB
C++
213 lines
6.2 KiB
C++
//===-- TargetParser - Parser for target features ---------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements a target parser to recognise hardware features such as
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// FPU/CPU/ARCH names as well as specific support such as HDIV, etc.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SUPPORT_TARGETPARSER_H
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#define LLVM_SUPPORT_TARGETPARSER_H
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// FIXME: vector is used because that's what clang uses for subtarget feature
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// lists, but SmallVector would probably be better
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#include "llvm/ADT/Triple.h"
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#include <vector>
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namespace llvm {
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class StringRef;
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// Target specific information into their own namespaces. These should be
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// generated from TableGen because the information is already there, and there
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// is where new information about targets will be added.
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// FIXME: To TableGen this we need to make some table generated files available
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// even if the back-end is not compiled with LLVM, plus we need to create a new
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// back-end to TableGen to create these clean tables.
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namespace ARM {
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// FPU Version
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enum class FPUVersion {
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NONE,
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VFPV2,
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VFPV3,
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VFPV3_FP16,
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VFPV4,
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VFPV5
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};
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// An FPU name restricts the FPU in one of three ways:
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enum class FPURestriction {
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None = 0, ///< No restriction
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D16, ///< Only 16 D registers
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SP_D16 ///< Only single-precision instructions, with 16 D registers
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};
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// An FPU name implies one of three levels of Neon support:
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enum class NeonSupportLevel {
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None = 0, ///< No Neon
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Neon, ///< Neon
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Crypto ///< Neon with Crypto
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};
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// FPU names.
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enum FPUKind {
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#define ARM_FPU(NAME, KIND, VERSION, NEON_SUPPORT, RESTRICTION) KIND,
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#include "ARMTargetParser.def"
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FK_LAST
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};
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// Arch names.
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enum class ArchKind {
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#define ARM_ARCH(NAME, ID, CPU_ATTR, SUB_ARCH, ARCH_ATTR, ARCH_FPU, ARCH_BASE_EXT) ID,
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#include "ARMTargetParser.def"
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};
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// Arch extension modifiers for CPUs.
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enum ArchExtKind : unsigned {
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AEK_INVALID = 0x0,
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AEK_NONE = 0x1,
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AEK_CRC = 0x2,
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AEK_CRYPTO = 0x4,
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AEK_FP = 0x8,
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AEK_HWDIVTHUMB = 0x10,
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AEK_HWDIVARM = 0x20,
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AEK_MP = 0x40,
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AEK_SIMD = 0x80,
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AEK_SEC = 0x100,
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AEK_VIRT = 0x200,
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AEK_DSP = 0x400,
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AEK_FP16 = 0x800,
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AEK_RAS = 0x1000,
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AEK_SVE = 0x2000,
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// Unsupported extensions.
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AEK_OS = 0x8000000,
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AEK_IWMMXT = 0x10000000,
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AEK_IWMMXT2 = 0x20000000,
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AEK_MAVERICK = 0x40000000,
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AEK_XSCALE = 0x80000000,
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};
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// ISA kinds.
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enum class ISAKind { INVALID = 0, ARM, THUMB, AARCH64 };
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// Endianness
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// FIXME: BE8 vs. BE32?
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enum class EndianKind { INVALID = 0, LITTLE, BIG };
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// v6/v7/v8 Profile
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enum class ProfileKind { INVALID = 0, A, R, M };
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StringRef getCanonicalArchName(StringRef Arch);
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// Information by ID
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StringRef getFPUName(unsigned FPUKind);
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FPUVersion getFPUVersion(unsigned FPUKind);
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NeonSupportLevel getFPUNeonSupportLevel(unsigned FPUKind);
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FPURestriction getFPURestriction(unsigned FPUKind);
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// FIXME: These should be moved to TargetTuple once it exists
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bool getFPUFeatures(unsigned FPUKind, std::vector<StringRef> &Features);
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bool getHWDivFeatures(unsigned HWDivKind, std::vector<StringRef> &Features);
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bool getExtensionFeatures(unsigned Extensions,
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std::vector<StringRef> &Features);
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StringRef getArchName(ArchKind AK);
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unsigned getArchAttr(ArchKind AK);
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StringRef getCPUAttr(ArchKind AK);
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StringRef getSubArch(ArchKind AK);
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StringRef getArchExtName(unsigned ArchExtKind);
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StringRef getArchExtFeature(StringRef ArchExt);
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StringRef getHWDivName(unsigned HWDivKind);
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// Information by Name
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unsigned getDefaultFPU(StringRef CPU, ArchKind AK);
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unsigned getDefaultExtensions(StringRef CPU, ArchKind AK);
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StringRef getDefaultCPU(StringRef Arch);
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// Parser
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unsigned parseHWDiv(StringRef HWDiv);
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unsigned parseFPU(StringRef FPU);
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ArchKind parseArch(StringRef Arch);
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unsigned parseArchExt(StringRef ArchExt);
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ArchKind parseCPUArch(StringRef CPU);
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ISAKind parseArchISA(StringRef Arch);
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EndianKind parseArchEndian(StringRef Arch);
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ProfileKind parseArchProfile(StringRef Arch);
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unsigned parseArchVersion(StringRef Arch);
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StringRef computeDefaultTargetABI(const Triple &TT, StringRef CPU);
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} // namespace ARM
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// FIXME:This should be made into class design,to avoid dupplication.
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namespace AArch64 {
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// Arch names.
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enum class ArchKind {
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#define AARCH64_ARCH(NAME, ID, CPU_ATTR, SUB_ARCH, ARCH_ATTR, ARCH_FPU, ARCH_BASE_EXT) ID,
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#include "AArch64TargetParser.def"
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};
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// Arch extension modifiers for CPUs.
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enum ArchExtKind : unsigned {
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AEK_INVALID = 0x0,
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AEK_NONE = 0x1,
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AEK_CRC = 0x2,
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AEK_CRYPTO = 0x4,
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AEK_FP = 0x8,
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AEK_SIMD = 0x10,
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AEK_FP16 = 0x20,
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AEK_PROFILE = 0x40,
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AEK_RAS = 0x80,
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AEK_LSE = 0x100,
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AEK_SVE = 0x200
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};
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StringRef getCanonicalArchName(StringRef Arch);
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// Information by ID
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StringRef getFPUName(unsigned FPUKind);
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ARM::FPUVersion getFPUVersion(unsigned FPUKind);
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ARM::NeonSupportLevel getFPUNeonSupportLevel(unsigned FPUKind);
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ARM::FPURestriction getFPURestriction(unsigned FPUKind);
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// FIXME: These should be moved to TargetTuple once it exists
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bool getFPUFeatures(unsigned FPUKind, std::vector<StringRef> &Features);
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bool getExtensionFeatures(unsigned Extensions,
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std::vector<StringRef> &Features);
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bool getArchFeatures(ArchKind AK, std::vector<StringRef> &Features);
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StringRef getArchName(ArchKind AK);
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unsigned getArchAttr(ArchKind AK);
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StringRef getCPUAttr(ArchKind AK);
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StringRef getSubArch(ArchKind AK);
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StringRef getArchExtName(unsigned ArchExtKind);
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StringRef getArchExtFeature(StringRef ArchExt);
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unsigned checkArchVersion(StringRef Arch);
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// Information by Name
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unsigned getDefaultFPU(StringRef CPU, ArchKind AK);
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unsigned getDefaultExtensions(StringRef CPU, ArchKind AK);
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StringRef getDefaultCPU(StringRef Arch);
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// Parser
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unsigned parseFPU(StringRef FPU);
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AArch64::ArchKind parseArch(StringRef Arch);
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unsigned parseArchExt(StringRef ArchExt);
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ArchKind parseCPUArch(StringRef CPU);
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ARM::ISAKind parseArchISA(StringRef Arch);
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ARM::EndianKind parseArchEndian(StringRef Arch);
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ARM::ProfileKind parseArchProfile(StringRef Arch);
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unsigned parseArchVersion(StringRef Arch);
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} // namespace AArch64
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} // namespace llvm
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#endif
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