LLVM  9.0.0svn
AArch64TargetParser.cpp
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1 //===-- AArch64TargetParser - Parser for AArch64 features -------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file implements a target parser to recognise AArch64 hardware features
10 // such as FPU/CPU/ARCH and extension names.
11 //
12 //===----------------------------------------------------------------------===//
13 
15 #include "llvm/ADT/StringRef.h"
16 #include "llvm/ADT/StringSwitch.h"
17 #include <cctype>
18 
19 using namespace llvm;
20 
21 static unsigned checkArchVersion(llvm::StringRef Arch) {
22  if (Arch.size() >= 2 && Arch[0] == 'v' && std::isdigit(Arch[1]))
23  return (Arch[1] - 48);
24  return 0;
25 }
26 
28  if (CPU == "generic")
29  return AArch64ARCHNames[static_cast<unsigned>(AK)].DefaultFPU;
30 
31  return StringSwitch<unsigned>(CPU)
32 #define AARCH64_CPU_NAME(NAME, ID, DEFAULT_FPU, IS_DEFAULT, DEFAULT_EXT) \
33  .Case(NAME, ARM::DEFAULT_FPU)
34 #include "../../include/llvm/Support/AArch64TargetParser.def"
35  .Default(ARM::FK_INVALID);
36 }
37 
39  if (CPU == "generic")
40  return AArch64ARCHNames[static_cast<unsigned>(AK)].ArchBaseExtensions;
41 
42  return StringSwitch<unsigned>(CPU)
43 #define AARCH64_CPU_NAME(NAME, ID, DEFAULT_FPU, IS_DEFAULT, DEFAULT_EXT) \
44  .Case(NAME, AArch64ARCHNames[static_cast<unsigned>(ArchKind::ID)] \
45  .ArchBaseExtensions | \
46  DEFAULT_EXT)
47 #include "../../include/llvm/Support/AArch64TargetParser.def"
48  .Default(AArch64::AEK_INVALID);
49 }
50 
52  if (CPU == "generic")
53  return ArchKind::ARMV8A;
54 
56 #define AARCH64_CPU_NAME(NAME, ID, DEFAULT_FPU, IS_DEFAULT, DEFAULT_EXT) \
57  .Case(NAME, ArchKind::ID)
58 #include "../../include/llvm/Support/AArch64TargetParser.def"
59  .Default(ArchKind::INVALID);
60 }
61 
63  std::vector<StringRef> &Features) {
64  if (Extensions == AArch64::AEK_INVALID)
65  return false;
66 
67  if (Extensions & AEK_FP)
68  Features.push_back("+fp-armv8");
69  if (Extensions & AEK_SIMD)
70  Features.push_back("+neon");
71  if (Extensions & AEK_CRC)
72  Features.push_back("+crc");
73  if (Extensions & AEK_CRYPTO)
74  Features.push_back("+crypto");
75  if (Extensions & AEK_DOTPROD)
76  Features.push_back("+dotprod");
77  if (Extensions & AEK_FP16FML)
78  Features.push_back("+fp16fml");
79  if (Extensions & AEK_FP16)
80  Features.push_back("+fullfp16");
81  if (Extensions & AEK_PROFILE)
82  Features.push_back("+spe");
83  if (Extensions & AEK_RAS)
84  Features.push_back("+ras");
85  if (Extensions & AEK_LSE)
86  Features.push_back("+lse");
87  if (Extensions & AEK_RDM)
88  Features.push_back("+rdm");
89  if (Extensions & AEK_SVE)
90  Features.push_back("+sve");
91  if (Extensions & AEK_RCPC)
92  Features.push_back("+rcpc");
93 
94  return true;
95 }
96 
98  std::vector<StringRef> &Features) {
99  if (AK == ArchKind::ARMV8_1A)
100  Features.push_back("+v8.1a");
101  if (AK == ArchKind::ARMV8_2A)
102  Features.push_back("+v8.2a");
103  if (AK == ArchKind::ARMV8_3A)
104  Features.push_back("+v8.3a");
105  if (AK == ArchKind::ARMV8_4A)
106  Features.push_back("+v8.4a");
107  if (AK == ArchKind::ARMV8_5A)
108  Features.push_back("+v8.5a");
109 
110  return AK != ArchKind::INVALID;
111 }
112 
114  return AArch64ARCHNames[static_cast<unsigned>(AK)].getName();
115 }
116 
118  return AArch64ARCHNames[static_cast<unsigned>(AK)].getCPUAttr();
119 }
120 
122  return AArch64ARCHNames[static_cast<unsigned>(AK)].getSubArch();
123 }
124 
126  return AArch64ARCHNames[static_cast<unsigned>(AK)].ArchAttr;
127 }
128 
130  for (const auto &AE : AArch64ARCHExtNames)
131  if (ArchExtKind == AE.ID)
132  return AE.getName();
133  return StringRef();
134 }
135 
137  if (ArchExt.startswith("no")) {
138  StringRef ArchExtBase(ArchExt.substr(2));
139  for (const auto &AE : AArch64ARCHExtNames) {
140  if (AE.NegFeature && ArchExtBase == AE.getName())
141  return StringRef(AE.NegFeature);
142  }
143  }
144 
145  for (const auto &AE : AArch64ARCHExtNames)
146  if (AE.Feature && ArchExt == AE.getName())
147  return StringRef(AE.Feature);
148  return StringRef();
149 }
150 
152  ArchKind AK = parseArch(Arch);
153  if (AK == ArchKind::INVALID)
154  return StringRef();
155 
156  // Look for multiple AKs to find the default for pair AK+Name.
157  for (const auto &CPU : AArch64CPUNames)
158  if (CPU.ArchID == AK && CPU.Default)
159  return CPU.getName();
160 
161  // If we can't find a default then target the architecture instead
162  return "generic";
163 }
164 
166  for (const auto &Arch : AArch64CPUNames) {
167  if (Arch.ArchID != ArchKind::INVALID)
168  Values.push_back(Arch.getName());
169  }
170 }
171 
173  return TT.isAndroid() || TT.isOSDarwin() || TT.isOSFuchsia() ||
174  TT.isOSWindows();
175 }
176 
177 // Allows partial match, ex. "v8a" matches "armv8a".
179  Arch = ARM::getCanonicalArchName(Arch);
180  if (checkArchVersion(Arch) < 8)
181  return ArchKind::INVALID;
182 
183  StringRef Syn = ARM::getArchSynonym(Arch);
184  for (const auto A : AArch64ARCHNames) {
185  if (A.getName().endswith(Syn))
186  return A.ID;
187  }
188  return ArchKind::INVALID;
189 }
190 
192  for (const auto A : AArch64ARCHExtNames) {
193  if (ArchExt == A.getName())
194  return static_cast<ArchExtKind>(A.ID);
195  }
196  return AArch64::AEK_INVALID;
197 }
198 
200  for (const auto C : AArch64CPUNames) {
201  if (CPU == C.getName())
202  return C.ArchID;
203  }
204  return ArchKind::INVALID;
205 }
unsigned getArchAttr(ArchKind AK)
uint64_t CallInst * C
bool isOSDarwin() const
isOSDarwin - Is this a "Darwin" OS (OS X, iOS, or watchOS).
Definition: Triple.h:474
This class represents lattice values for constants.
Definition: AllocatorList.h:23
ArchKind getCPUArchKind(StringRef CPU)
LLVM_NODISCARD bool startswith(StringRef Prefix) const
Check if this string starts with the given Prefix.
Definition: StringRef.h:256
void push_back(const T &Elt)
Definition: SmallVector.h:211
const FeatureBitset Features
bool isOSFuchsia() const
Definition: Triple.h:494
StringRef getCPUAttr(ArchKind AK)
ArchExtKind parseArchExt(StringRef ArchExt)
StringRef getArchExtName(unsigned ArchExtKind)
unsigned getDefaultFPU(StringRef CPU, ArchKind AK)
StringRef getArchExtFeature(StringRef ArchExt)
static StringRef getName(Value *V)
StringRef getCanonicalArchName(StringRef Arch)
bool getExtensionFeatures(unsigned Extensions, std::vector< StringRef > &Features)
LLVM_NODISCARD StringRef substr(size_t Start, size_t N=npos) const
Return a reference to the substring from [Start, Start + N).
Definition: StringRef.h:578
ArchKind parseArch(StringRef Arch)
LLVM_NODISCARD size_t size() const
size - Get the string size.
Definition: StringRef.h:130
#define AARCH64_CPU_NAME(NAME, ID, DEFAULT_FPU, IS_DEFAULT, DEFAULT_EXT)
StringRef getArchName(ArchKind AK)
bool isOSWindows() const
Tests whether the OS is Windows.
Definition: Triple.h:527
A switch()-like statement whose cases are string literals.
Definition: StringSwitch.h:42
bool isX18ReservedByDefault(const Triple &TT)
const ARM::ExtName AArch64ARCHExtNames[]
const ARM::CpuNames< ArchKind > AArch64CPUNames[]
static const struct @393 Extensions[]
Triple - Helper class for working with autoconf configuration names.
Definition: Triple.h:43
StringRef getArchSynonym(StringRef Arch)
void fillValidCPUArchList(SmallVectorImpl< StringRef > &Values)
const ARM::ArchNames< ArchKind > AArch64ARCHNames[]
static unsigned checkArchVersion(llvm::StringRef Arch)
StringRef getName() const
Return a constant reference to the value&#39;s name.
Definition: Value.cpp:214
ArchKind parseCPUArch(StringRef CPU)
static Triple::ArchType parseArch(StringRef ArchName)
Definition: Triple.cpp:378
StringRef getSubArch(ArchKind AK)
bool isAndroid() const
Tests whether the target is Android.
Definition: Triple.h:635
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:48
bool getArchFeatures(ArchKind AK, std::vector< StringRef > &Features)
StringRef getDefaultCPU(StringRef Arch)
unsigned getDefaultExtensions(StringRef CPU, ArchKind AK)