clang  9.0.0svn
AVR.h
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1 //===--- AVR.h - Declare AVR target feature support -------------*- 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 declares AVR TargetInfo objects.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #ifndef LLVM_CLANG_LIB_BASIC_TARGETS_AVR_H
14 #define LLVM_CLANG_LIB_BASIC_TARGETS_AVR_H
15 
16 #include "clang/Basic/TargetInfo.h"
18 #include "llvm/ADT/Triple.h"
19 #include "llvm/Support/Compiler.h"
20 
21 namespace clang {
22 namespace targets {
23 
24 // AVR Target
25 class LLVM_LIBRARY_VISIBILITY AVRTargetInfo : public TargetInfo {
26 public:
27  AVRTargetInfo(const llvm::Triple &Triple, const TargetOptions &)
28  : TargetInfo(Triple) {
29  TLSSupported = false;
30  PointerWidth = 16;
31  PointerAlign = 8;
32  IntWidth = 16;
33  IntAlign = 8;
34  LongWidth = 32;
35  LongAlign = 8;
36  LongLongWidth = 64;
37  LongLongAlign = 8;
38  SuitableAlign = 8;
39  DefaultAlignForAttributeAligned = 8;
40  HalfWidth = 16;
41  HalfAlign = 8;
42  FloatWidth = 32;
43  FloatAlign = 8;
44  DoubleWidth = 32;
45  DoubleAlign = 8;
46  DoubleFormat = &llvm::APFloat::IEEEsingle();
47  LongDoubleWidth = 32;
48  LongDoubleAlign = 8;
49  LongDoubleFormat = &llvm::APFloat::IEEEsingle();
50  SizeType = UnsignedInt;
51  PtrDiffType = SignedInt;
52  IntPtrType = SignedInt;
53  Char16Type = UnsignedInt;
54  WIntType = SignedInt;
55  Char32Type = UnsignedLong;
56  SigAtomicType = SignedChar;
57  resetDataLayout("e-P1-p:16:8-i8:8-i16:8-i32:8-i64:8-f32:8-f64:8-n8-a:8");
58  }
59 
60  void getTargetDefines(const LangOptions &Opts,
61  MacroBuilder &Builder) const override;
62 
63  ArrayRef<Builtin::Info> getTargetBuiltins() const override { return None; }
64 
67  }
68 
69  const char *getClobbers() const override { return ""; }
70 
72  static const char *const GCCRegNames[] = {
73  "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9",
74  "r10", "r11", "r12", "r13", "r14", "r15", "r16", "r17", "r18", "r19",
75  "r20", "r21", "r22", "r23", "r24", "r25", "X", "Y", "Z", "SP"
76  };
77  return llvm::makeArrayRef(GCCRegNames);
78  }
79 
81  return None;
82  }
83 
85  static const TargetInfo::AddlRegName AddlRegNames[] = {
86  {{"r26", "r27"}, 26},
87  {{"r28", "r29"}, 27},
88  {{"r30", "r31"}, 28},
89  {{"SPL", "SPH"}, 29},
90  };
91  return llvm::makeArrayRef(AddlRegNames);
92  }
93 
94  bool validateAsmConstraint(const char *&Name,
95  TargetInfo::ConstraintInfo &Info) const override {
96  // There aren't any multi-character AVR specific constraints.
97  if (StringRef(Name).size() > 1)
98  return false;
99 
100  switch (*Name) {
101  default:
102  return false;
103  case 'a': // Simple upper registers
104  case 'b': // Base pointer registers pairs
105  case 'd': // Upper register
106  case 'l': // Lower registers
107  case 'e': // Pointer register pairs
108  case 'q': // Stack pointer register
109  case 'r': // Any register
110  case 'w': // Special upper register pairs
111  case 't': // Temporary register
112  case 'x':
113  case 'X': // Pointer register pair X
114  case 'y':
115  case 'Y': // Pointer register pair Y
116  case 'z':
117  case 'Z': // Pointer register pair Z
118  Info.setAllowsRegister();
119  return true;
120  case 'I': // 6-bit positive integer constant
121  Info.setRequiresImmediate(0, 63);
122  return true;
123  case 'J': // 6-bit negative integer constant
124  Info.setRequiresImmediate(-63, 0);
125  return true;
126  case 'K': // Integer constant (Range: 2)
127  Info.setRequiresImmediate(2);
128  return true;
129  case 'L': // Integer constant (Range: 0)
130  Info.setRequiresImmediate(0);
131  return true;
132  case 'M': // 8-bit integer constant
133  Info.setRequiresImmediate(0, 0xff);
134  return true;
135  case 'N': // Integer constant (Range: -1)
136  Info.setRequiresImmediate(-1);
137  return true;
138  case 'O': // Integer constant (Range: 8, 16, 24)
139  Info.setRequiresImmediate({8, 16, 24});
140  return true;
141  case 'P': // Integer constant (Range: 1)
142  Info.setRequiresImmediate(1);
143  return true;
144  case 'R': // Integer constant (Range: -6 to 5)
145  Info.setRequiresImmediate(-6, 5);
146  return true;
147  case 'G': // Floating point constant
148  case 'Q': // A memory address based on Y or Z pointer with displacement.
149  return true;
150  }
151 
152  return false;
153  }
154 
155  IntType getIntTypeByWidth(unsigned BitWidth, bool IsSigned) const final {
156  // AVR prefers int for 16-bit integers.
157  return BitWidth == 16 ? (IsSigned ? SignedInt : UnsignedInt)
158  : TargetInfo::getIntTypeByWidth(BitWidth, IsSigned);
159  }
160 
161  IntType getLeastIntTypeByWidth(unsigned BitWidth, bool IsSigned) const final {
162  // AVR uses int for int_least16_t and int_fast16_t.
163  return BitWidth == 16
164  ? (IsSigned ? SignedInt : UnsignedInt)
165  : TargetInfo::getLeastIntTypeByWidth(BitWidth, IsSigned);
166  }
167 
168  bool isValidCPUName(StringRef Name) const override;
169  void fillValidCPUList(SmallVectorImpl<StringRef> &Values) const override;
170  bool setCPU(const std::string &Name) override {
171  bool isValid = isValidCPUName(Name);
172  if (isValid)
173  CPU = Name;
174  return isValid;
175  }
176 
177 protected:
178  std::string CPU;
179 };
180 
181 } // namespace targets
182 } // namespace clang
183 
184 #endif // LLVM_CLANG_LIB_BASIC_TARGETS_AVR_H
AVRTargetInfo(const llvm::Triple &Triple, const TargetOptions &)
Definition: AVR.h:27
virtual IntType getLeastIntTypeByWidth(unsigned BitWidth, bool IsSigned) const
Return the smallest integer type with at least the specified width.
Definition: TargetInfo.cpp:244
ArrayRef< TargetInfo::AddlRegName > getGCCAddlRegNames() const override
Definition: AVR.h:84
IntType getLeastIntTypeByWidth(unsigned BitWidth, bool IsSigned) const final
Return the smallest integer type with at least the specified width.
Definition: AVR.h:161
void setRequiresImmediate(int Min, int Max)
Definition: TargetInfo.h:871
Options for controlling the target.
Definition: TargetOptions.h:26
const char * getClobbers() const override
Returns a string of target-specific clobbers, in LLVM format.
Definition: AVR.h:69
const TargetInfo::AddlRegName AddlRegNames[]
Definition: X86.cpp:67
Keeps track of the various options that can be enabled, which controls the dialect of C or C++ that i...
Definition: LangOptions.h:49
ArrayRef< TargetInfo::GCCRegAlias > getGCCRegAliases() const override
Definition: AVR.h:80
bool setCPU(const std::string &Name) override
Target the specified CPU.
Definition: AVR.h:170
static const char *const GCCRegNames[]
Definition: X86.cpp:43
typedef void* __builtin_va_list;
Definition: TargetInfo.h:228
Exposes information about the current target.
Definition: TargetInfo.h:161
IntType getIntTypeByWidth(unsigned BitWidth, bool IsSigned) const final
Return integer type with specified width.
Definition: AVR.h:155
ArrayRef< const char * > getGCCRegNames() const override
Definition: AVR.h:71
Defines the clang::TargetOptions class.
IntType
===-— Target Data Type Query Methods ----------------------------—===//
Definition: TargetInfo.h:104
Dataflow Directional Tag Classes.
virtual IntType getIntTypeByWidth(unsigned BitWidth, bool IsSigned) const
Return integer type with specified width.
Definition: TargetInfo.cpp:229
BuiltinVaListKind
The different kinds of __builtin_va_list types defined by the target implementation.
Definition: TargetInfo.h:223
BuiltinVaListKind getBuiltinVaListKind() const override
Returns the kind of __builtin_va_list type that should be used with this target.
Definition: AVR.h:65
Defines the clang::TargetInfo interface.
ArrayRef< Builtin::Info > getTargetBuiltins() const override
Return information about target-specific builtins for the current primary target, and info about whic...
Definition: AVR.h:63
bool validateAsmConstraint(const char *&Name, TargetInfo::ConstraintInfo &Info) const override
Definition: AVR.h:94