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"
17#include "clang/Basic/TargetOptions.h"
18#include "llvm/ADT/Triple.h"
19#include "llvm/Support/Compiler.h"
20
21namespace clang {
22namespace targets {
23
24// AVR Target
25class LLVM_LIBRARY_VISIBILITY AVRTargetInfo : public TargetInfo {
26public:
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
65  BuiltinVaListKind getBuiltinVaListKind() const override {
66    return TargetInfo::VoidPtrBuiltinVaList;
67  }
68
69  const char *getClobbers() const override { return ""; }
70
71  ArrayRef<const char *> getGCCRegNames() const override {
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
80  ArrayRef<TargetInfo::GCCRegAlias> getGCCRegAliases() const override {
81    return None;
82  }
83
84  ArrayRef<TargetInfo::AddlRegName> getGCCAddlRegNames() const override {
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
177protected:
178  std::string CPU;
179};
180
181} // namespace targets
182} // namespace clang
183
184#endif // LLVM_CLANG_LIB_BASIC_TARGETS_AVR_H
185