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//===--- M68k.cpp - Implement M68k targets feature support-------------===//
//
// 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 implements M68k TargetInfo objects.
//
//===----------------------------------------------------------------------===//
#include "M68k.h"
#include "clang/Basic/Builtins.h"
#include "clang/Basic/Diagnostic.h"
#include "clang/Basic/TargetBuiltins.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/Support/TargetParser.h"
#include <cstdint>
#include <cstring>
#include <limits>
#include <optional>
namespace clang {
namespace targets {
M68kTargetInfo::M68kTargetInfo(const llvm::Triple &Triple,
const TargetOptions &)
: TargetInfo(Triple) {
std::string Layout;
// M68k is Big Endian
Layout += "E";
// FIXME how to wire it with the used object format?
Layout += "-m:e";
// M68k pointers are always 32 bit wide even for 16-bit CPUs
Layout += "-p:32:16:32";
// M68k integer data types
Layout += "-i8:8:8-i16:16:16-i32:16:32";
// FIXME no floats at the moment
// The registers can hold 8, 16, 32 bits
Layout += "-n8:16:32";
// 16 bit alignment for both stack and aggregate
// in order to conform to ABI used by GCC
Layout += "-a:0:16-S16";
resetDataLayout(Layout);
SizeType = UnsignedInt;
PtrDiffType = SignedInt;
IntPtrType = SignedInt;
}
bool M68kTargetInfo::setCPU(const std::string &Name) {
StringRef N = Name;
CPU = llvm::StringSwitch<CPUKind>(N)
.Case("generic", CK_68000)
.Case("M68000", CK_68000)
.Case("M68010", CK_68010)
.Case("M68020", CK_68020)
.Case("M68030", CK_68030)
.Case("M68040", CK_68040)
.Case("M68060", CK_68060)
.Default(CK_Unknown);
return CPU != CK_Unknown;
}
void M68kTargetInfo::getTargetDefines(const LangOptions &Opts,
MacroBuilder &Builder) const {
using llvm::Twine;
Builder.defineMacro("__m68k__");
Builder.defineMacro("mc68000");
Builder.defineMacro("__mc68000");
Builder.defineMacro("__mc68000__");
// For sub-architecture
switch (CPU) {
case CK_68010:
Builder.defineMacro("mc68010");
Builder.defineMacro("__mc68010");
Builder.defineMacro("__mc68010__");
break;
case CK_68020:
Builder.defineMacro("mc68020");
Builder.defineMacro("__mc68020");
Builder.defineMacro("__mc68020__");
break;
case CK_68030:
Builder.defineMacro("mc68030");
Builder.defineMacro("__mc68030");
Builder.defineMacro("__mc68030__");
break;
case CK_68040:
Builder.defineMacro("mc68040");
Builder.defineMacro("__mc68040");
Builder.defineMacro("__mc68040__");
break;
case CK_68060:
Builder.defineMacro("mc68060");
Builder.defineMacro("__mc68060");
Builder.defineMacro("__mc68060__");
break;
default:
break;
}
if (CPU >= CK_68020) {
Builder.defineMacro("__GCC_HAVE_SYNC_COMPARE_AND_SWAP_1");
Builder.defineMacro("__GCC_HAVE_SYNC_COMPARE_AND_SWAP_2");
Builder.defineMacro("__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4");
}
}
ArrayRef<Builtin::Info> M68kTargetInfo::getTargetBuiltins() const {
// FIXME: Implement.
return std::nullopt;
}
bool M68kTargetInfo::hasFeature(StringRef Feature) const {
// FIXME elaborate moar
return Feature == "M68000";
}
const char *const M68kTargetInfo::GCCRegNames[] = {
"d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7",
"a0", "a1", "a2", "a3", "a4", "a5", "a6", "a7",
"pc"};
ArrayRef<const char *> M68kTargetInfo::getGCCRegNames() const {
return llvm::ArrayRef(GCCRegNames);
}
ArrayRef<TargetInfo::GCCRegAlias> M68kTargetInfo::getGCCRegAliases() const {
// No aliases.
return std::nullopt;
}
bool M68kTargetInfo::validateAsmConstraint(
const char *&Name, TargetInfo::ConstraintInfo &info) const {
switch (*Name) {
case 'a': // address register
case 'd': // data register
info.setAllowsRegister();
return true;
case 'I': // constant integer in the range [1,8]
info.setRequiresImmediate(1, 8);
return true;
case 'J': // constant signed 16-bit integer
info.setRequiresImmediate(std::numeric_limits<int16_t>::min(),
std::numeric_limits<int16_t>::max());
return true;
case 'K': // constant that is NOT in the range of [-0x80, 0x80)
info.setRequiresImmediate();
return true;
case 'L': // constant integer in the range [-8,-1]
info.setRequiresImmediate(-8, -1);
return true;
case 'M': // constant that is NOT in the range of [-0x100, 0x100]
info.setRequiresImmediate();
return true;
case 'N': // constant integer in the range [24,31]
info.setRequiresImmediate(24, 31);
return true;
case 'O': // constant integer 16
info.setRequiresImmediate(16);
return true;
case 'P': // constant integer in the range [8,15]
info.setRequiresImmediate(8, 15);
return true;
case 'C':
++Name;
switch (*Name) {
case '0': // constant integer 0
info.setRequiresImmediate(0);
return true;
case 'i': // constant integer
case 'j': // integer constant that doesn't fit in 16 bits
info.setRequiresImmediate();
return true;
default:
break;
}
break;
default:
break;
}
return false;
}
std::optional<std::string>
M68kTargetInfo::handleAsmEscapedChar(char EscChar) const {
char C;
switch (EscChar) {
case '.':
case '#':
C = EscChar;
break;
case '/':
C = '%';
break;
case '$':
C = 's';
break;
case '&':
C = 'd';
break;
default:
return std::nullopt;
}
return std::string(1, C);
}
std::string M68kTargetInfo::convertConstraint(const char *&Constraint) const {
if (*Constraint == 'C')
// Two-character constraint; add "^" hint for later parsing
return std::string("^") + std::string(Constraint++, 2);
return std::string(1, *Constraint);
}
const char *M68kTargetInfo::getClobbers() const {
// FIXME: Is this really right?
return "";
}
TargetInfo::BuiltinVaListKind M68kTargetInfo::getBuiltinVaListKind() const {
return TargetInfo::VoidPtrBuiltinVaList;
}
} // namespace targets
} // namespace clang
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