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//===--- AVR.h - Declare AVR target feature support -------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file declares AVR TargetInfo objects.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_LIB_BASIC_TARGETS_AVR_H
#define LLVM_CLANG_LIB_BASIC_TARGETS_AVR_H
#include "clang/Basic/TargetInfo.h"
#include "clang/Basic/TargetOptions.h"
#include "llvm/ADT/Triple.h"
#include "llvm/Support/Compiler.h"
namespace clang {
namespace targets {
// AVR Target
class LLVM_LIBRARY_VISIBILITY AVRTargetInfo : public TargetInfo {
public:
AVRTargetInfo(const llvm::Triple &Triple, const TargetOptions &)
: TargetInfo(Triple) {
TLSSupported = false;
PointerWidth = 16;
PointerAlign = 8;
IntWidth = 16;
IntAlign = 8;
LongWidth = 32;
LongAlign = 8;
LongLongWidth = 64;
LongLongAlign = 8;
SuitableAlign = 8;
DefaultAlignForAttributeAligned = 8;
HalfWidth = 16;
HalfAlign = 8;
FloatWidth = 32;
FloatAlign = 8;
DoubleWidth = 32;
DoubleAlign = 8;
DoubleFormat = &llvm::APFloat::IEEEsingle();
LongDoubleWidth = 32;
LongDoubleAlign = 8;
LongDoubleFormat = &llvm::APFloat::IEEEsingle();
SizeType = UnsignedInt;
PtrDiffType = SignedInt;
IntPtrType = SignedInt;
Char16Type = UnsignedInt;
WIntType = SignedInt;
Int16Type = SignedInt;
Char32Type = UnsignedLong;
SigAtomicType = SignedChar;
resetDataLayout("e-P1-p:16:8-i8:8-i16:8-i32:8-i64:8-f32:8-f64:8-n8-a:8");
}
void getTargetDefines(const LangOptions &Opts,
MacroBuilder &Builder) const override;
ArrayRef<Builtin::Info> getTargetBuiltins() const override {
return std::nullopt;
}
BuiltinVaListKind getBuiltinVaListKind() const override {
return TargetInfo::VoidPtrBuiltinVaList;
}
const char *getClobbers() const override { return ""; }
ArrayRef<const char *> getGCCRegNames() const override {
static const char *const GCCRegNames[] = {
"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9",
"r10", "r11", "r12", "r13", "r14", "r15", "r16", "r17", "r18", "r19",
"r20", "r21", "r22", "r23", "r24", "r25", "X", "Y", "Z", "SP"};
return llvm::ArrayRef(GCCRegNames);
}
ArrayRef<TargetInfo::GCCRegAlias> getGCCRegAliases() const override {
return std::nullopt;
}
ArrayRef<TargetInfo::AddlRegName> getGCCAddlRegNames() const override {
static const TargetInfo::AddlRegName AddlRegNames[] = {
{{"r26", "r27"}, 26},
{{"r28", "r29"}, 27},
{{"r30", "r31"}, 28},
{{"SPL", "SPH"}, 29},
};
return llvm::ArrayRef(AddlRegNames);
}
bool validateAsmConstraint(const char *&Name,
TargetInfo::ConstraintInfo &Info) const override {
// There aren't any multi-character AVR specific constraints.
if (StringRef(Name).size() > 1)
return false;
switch (*Name) {
default:
return false;
case 'a': // Simple upper registers
case 'b': // Base pointer registers pairs
case 'd': // Upper register
case 'l': // Lower registers
case 'e': // Pointer register pairs
case 'q': // Stack pointer register
case 'r': // Any register
case 'w': // Special upper register pairs
case 't': // Temporary register
case 'x':
case 'X': // Pointer register pair X
case 'y':
case 'Y': // Pointer register pair Y
case 'z':
case 'Z': // Pointer register pair Z
Info.setAllowsRegister();
return true;
case 'I': // 6-bit positive integer constant
Info.setRequiresImmediate(0, 63);
return true;
case 'J': // 6-bit negative integer constant
Info.setRequiresImmediate(-63, 0);
return true;
case 'K': // Integer constant (Range: 2)
Info.setRequiresImmediate(2);
return true;
case 'L': // Integer constant (Range: 0)
Info.setRequiresImmediate(0);
return true;
case 'M': // 8-bit integer constant
Info.setRequiresImmediate(0, 0xff);
return true;
case 'N': // Integer constant (Range: -1)
Info.setRequiresImmediate(-1);
return true;
case 'O': // Integer constant (Range: 8, 16, 24)
Info.setRequiresImmediate({8, 16, 24});
return true;
case 'P': // Integer constant (Range: 1)
Info.setRequiresImmediate(1);
return true;
case 'R': // Integer constant (Range: -6 to 5)
Info.setRequiresImmediate(-6, 5);
return true;
case 'G': // Floating point constant
case 'Q': // A memory address based on Y or Z pointer with displacement.
return true;
}
return false;
}
IntType getIntTypeByWidth(unsigned BitWidth, bool IsSigned) const final {
// AVR prefers int for 16-bit integers.
return BitWidth == 16 ? (IsSigned ? SignedInt : UnsignedInt)
: TargetInfo::getIntTypeByWidth(BitWidth, IsSigned);
}
IntType getLeastIntTypeByWidth(unsigned BitWidth, bool IsSigned) const final {
// AVR uses int for int_least16_t and int_fast16_t.
return BitWidth == 16
? (IsSigned ? SignedInt : UnsignedInt)
: TargetInfo::getLeastIntTypeByWidth(BitWidth, IsSigned);
}
bool isValidCPUName(StringRef Name) const override;
void fillValidCPUList(SmallVectorImpl<StringRef> &Values) const override;
bool setCPU(const std::string &Name) override;
StringRef getABI() const override { return ABI; }
protected:
std::string CPU;
StringRef ABI;
StringRef DefineName;
StringRef Arch;
int NumFlashBanks = 0;
};
} // namespace targets
} // namespace clang
#endif // LLVM_CLANG_LIB_BASIC_TARGETS_AVR_H
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