AVR.h source code [clang_source_code/lib/Basic/Targets/AVR.h]

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
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
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
177	protected:
178	std::string CPU;
179	};
180
181	} // namespace targets
182	} // namespace clang
183
184	#endif // LLVM_CLANG_LIB_BASIC_TARGETS_AVR_H
185

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