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/Support/Compiler.h"
19#include "llvm/TargetParser/Triple.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 Int16Type = SignedInt;
56 Char32Type = UnsignedLong;
57 SigAtomicType = SignedChar;
58 resetDataLayout(DL: "e-P1-p:16:8-i8:8-i16:8-i32:8-i64:8-f32:8-f64:8-n8-a:8");
59 }
60
61 void getTargetDefines(const LangOptions &Opts,
62 MacroBuilder &Builder) const override;
63
64 ArrayRef<Builtin::Info> getTargetBuiltins() const override {
65 return std::nullopt;
66 }
67
68 BuiltinVaListKind getBuiltinVaListKind() const override {
69 return TargetInfo::VoidPtrBuiltinVaList;
70 }
71
72 std::string_view getClobbers() const override { return ""; }
73
74 ArrayRef<const char *> getGCCRegNames() const override {
75 static const char *const GCCRegNames[] = {
76 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9",
77 "r10", "r11", "r12", "r13", "r14", "r15", "r16", "r17", "r18", "r19",
78 "r20", "r21", "r22", "r23", "r24", "r25", "X", "Y", "Z", "SP"};
79 return llvm::ArrayRef(GCCRegNames);
80 }
81
82 ArrayRef<TargetInfo::GCCRegAlias> getGCCRegAliases() const override {
83 return std::nullopt;
84 }
85
86 ArrayRef<TargetInfo::AddlRegName> getGCCAddlRegNames() const override {
87 static const TargetInfo::AddlRegName AddlRegNames[] = {
88 {.Names: {"r26", "r27"}, .RegNum: 26},
89 {.Names: {"r28", "r29"}, .RegNum: 27},
90 {.Names: {"r30", "r31"}, .RegNum: 28},
91 {.Names: {"SPL", "SPH"}, .RegNum: 29},
92 };
93 return llvm::ArrayRef(AddlRegNames);
94 }
95
96 bool validateAsmConstraint(const char *&Name,
97 TargetInfo::ConstraintInfo &Info) const override {
98 // There aren't any multi-character AVR specific constraints.
99 if (StringRef(Name).size() > 1)
100 return false;
101
102 switch (*Name) {
103 default:
104 return false;
105 case 'a': // Simple upper registers
106 case 'b': // Base pointer registers pairs
107 case 'd': // Upper register
108 case 'l': // Lower registers
109 case 'e': // Pointer register pairs
110 case 'q': // Stack pointer register
111 case 'r': // Any register
112 case 'w': // Special upper register pairs
113 case 't': // Temporary register
114 case 'x':
115 case 'X': // Pointer register pair X
116 case 'y':
117 case 'Y': // Pointer register pair Y
118 case 'z':
119 case 'Z': // Pointer register pair Z
120 Info.setAllowsRegister();
121 return true;
122 case 'I': // 6-bit positive integer constant
123 Info.setRequiresImmediate(Min: 0, Max: 63);
124 return true;
125 case 'J': // 6-bit negative integer constant
126 Info.setRequiresImmediate(Min: -63, Max: 0);
127 return true;
128 case 'K': // Integer constant (Range: 2)
129 Info.setRequiresImmediate(2);
130 return true;
131 case 'L': // Integer constant (Range: 0)
132 Info.setRequiresImmediate(0);
133 return true;
134 case 'M': // 8-bit integer constant
135 Info.setRequiresImmediate(Min: 0, Max: 0xff);
136 return true;
137 case 'N': // Integer constant (Range: -1)
138 Info.setRequiresImmediate(-1);
139 return true;
140 case 'O': // Integer constant (Range: 8, 16, 24)
141 Info.setRequiresImmediate({8, 16, 24});
142 return true;
143 case 'P': // Integer constant (Range: 1)
144 Info.setRequiresImmediate(1);
145 return true;
146 case 'R': // Integer constant (Range: -6 to 5)
147 Info.setRequiresImmediate(Min: -6, Max: 5);
148 return true;
149 case 'G': // Floating point constant 0.0
150 Info.setRequiresImmediate(0);
151 return true;
152 case 'Q': // A memory address based on Y or Z pointer with displacement.
153 return true;
154 }
155
156 return false;
157 }
158
159 IntType getIntTypeByWidth(unsigned BitWidth, bool IsSigned) const final {
160 // AVR prefers int for 16-bit integers.
161 return BitWidth == 16 ? (IsSigned ? SignedInt : UnsignedInt)
162 : TargetInfo::getIntTypeByWidth(BitWidth, IsSigned);
163 }
164
165 IntType getLeastIntTypeByWidth(unsigned BitWidth, bool IsSigned) const final {
166 // AVR uses int for int_least16_t and int_fast16_t.
167 return BitWidth == 16
168 ? (IsSigned ? SignedInt : UnsignedInt)
169 : TargetInfo::getLeastIntTypeByWidth(BitWidth, IsSigned);
170 }
171
172 bool isValidCPUName(StringRef Name) const override;
173 void fillValidCPUList(SmallVectorImpl<StringRef> &Values) const override;
174 bool setCPU(const std::string &Name) override;
175 std::optional<std::string> handleAsmEscapedChar(char EscChar) const override;
176 StringRef getABI() const override { return ABI; }
177
178 std::pair<unsigned, unsigned> hardwareInterferenceSizes() const override {
179 return std::make_pair(x: 32, y: 32);
180 }
181
182protected:
183 std::string CPU;
184 StringRef ABI;
185 StringRef DefineName;
186 StringRef Arch;
187 int NumFlashBanks = 0;
188};
189
190} // namespace targets
191} // namespace clang
192
193#endif // LLVM_CLANG_LIB_BASIC_TARGETS_AVR_H
194