1//===--- M68k.cpp - Implement M68k targets feature support-------------===//
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 implements M68k TargetInfo objects.
10//
11//===----------------------------------------------------------------------===//
12
13#include "M68k.h"
14#include "clang/Basic/Builtins.h"
15#include "clang/Basic/Diagnostic.h"
16#include "llvm/ADT/StringRef.h"
17#include "llvm/ADT/StringSwitch.h"
18#include "llvm/TargetParser/TargetParser.h"
19#include <cstdint>
20#include <cstring>
21#include <limits>
22#include <optional>
23
24namespace clang {
25namespace targets {
26
27M68kTargetInfo::M68kTargetInfo(const llvm::Triple &Triple,
28 const TargetOptions &Opts)
29 : TargetInfo(Triple), TargetOpts(Opts) {
30 resetDataLayout();
31
32 SizeType = UnsignedInt;
33 PtrDiffType = SignedInt;
34 IntPtrType = SignedInt;
35 IntAlign = LongAlign = PointerAlign = 16;
36}
37
38bool M68kTargetInfo::setCPU(StringRef Name) {
39 CPU = llvm::StringSwitch<CPUKind>(Name)
40 .Case(S: "generic", Value: CK_68000)
41 .Case(S: "M68000", Value: CK_68000)
42 .Case(S: "M68010", Value: CK_68010)
43 .Case(S: "M68020", Value: CK_68020)
44 .Case(S: "M68030", Value: CK_68030)
45 .Case(S: "M68040", Value: CK_68040)
46 .Case(S: "M68060", Value: CK_68060)
47 .Default(Value: CK_Unknown);
48 return CPU != CK_Unknown;
49}
50
51void M68kTargetInfo::getTargetDefines(const LangOptions &Opts,
52 MacroBuilder &Builder) const {
53 using llvm::Twine;
54
55 Builder.defineMacro(Name: "__m68k__");
56
57 DefineStd(Builder, MacroName: "mc68000", Opts);
58
59 // For sub-architecture
60 switch (CPU) {
61 case CK_68010:
62 DefineStd(Builder, MacroName: "mc68010", Opts);
63 break;
64 case CK_68020:
65 DefineStd(Builder, MacroName: "mc68020", Opts);
66 break;
67 case CK_68030:
68 DefineStd(Builder, MacroName: "mc68030", Opts);
69 break;
70 case CK_68040:
71 DefineStd(Builder, MacroName: "mc68040", Opts);
72 break;
73 case CK_68060:
74 DefineStd(Builder, MacroName: "mc68060", Opts);
75 break;
76 default:
77 break;
78 }
79
80 if (CPU >= CK_68020) {
81 Builder.defineMacro(Name: "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_1");
82 Builder.defineMacro(Name: "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_2");
83 Builder.defineMacro(Name: "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4");
84 }
85
86 // Floating point
87 if (TargetOpts.FeatureMap.lookup(Key: "isa-68881") ||
88 TargetOpts.FeatureMap.lookup(Key: "isa-68882"))
89 Builder.defineMacro(Name: "__HAVE_68881__");
90}
91
92llvm::SmallVector<Builtin::InfosShard>
93M68kTargetInfo::getTargetBuiltins() const {
94 // FIXME: Implement.
95 return {};
96}
97
98bool M68kTargetInfo::hasFeature(StringRef Feature) const {
99 // FIXME elaborate moar
100 return Feature == "M68000";
101}
102
103const char *const M68kTargetInfo::GCCRegNames[] = {
104 "d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7",
105 "a0", "a1", "a2", "a3", "a4", "a5", "a6", "sp",
106 "pc"};
107
108ArrayRef<const char *> M68kTargetInfo::getGCCRegNames() const {
109 return llvm::ArrayRef(GCCRegNames);
110}
111
112const TargetInfo::GCCRegAlias M68kTargetInfo::GCCRegAliases[] = {
113 {.Aliases: {"bp"}, .Register: "a5"},
114 {.Aliases: {"fp"}, .Register: "a6"},
115 {.Aliases: {"usp", "ssp", "isp", "a7"}, .Register: "sp"},
116};
117
118ArrayRef<TargetInfo::GCCRegAlias> M68kTargetInfo::getGCCRegAliases() const {
119 return llvm::ArrayRef(GCCRegAliases);
120}
121
122bool M68kTargetInfo::validateAsmConstraint(
123 const char *&Name, TargetInfo::ConstraintInfo &info) const {
124 switch (*Name) {
125 case 'a': // address register
126 case 'd': // data register
127 info.setAllowsRegister();
128 return true;
129 case 'I': // constant integer in the range [1,8]
130 info.setRequiresImmediate(Min: 1, Max: 8);
131 return true;
132 case 'J': // constant signed 16-bit integer
133 info.setRequiresImmediate(Min: std::numeric_limits<int16_t>::min(),
134 Max: std::numeric_limits<int16_t>::max());
135 return true;
136 case 'K': // constant that is NOT in the range of [-0x80, 0x80)
137 info.setRequiresImmediate();
138 return true;
139 case 'L': // constant integer in the range [-8,-1]
140 info.setRequiresImmediate(Min: -8, Max: -1);
141 return true;
142 case 'M': // constant that is NOT in the range of [-0x100, 0x100]
143 info.setRequiresImmediate();
144 return true;
145 case 'N': // constant integer in the range [24,31]
146 info.setRequiresImmediate(Min: 24, Max: 31);
147 return true;
148 case 'O': // constant integer 16
149 info.setRequiresImmediate(16);
150 return true;
151 case 'P': // constant integer in the range [8,15]
152 info.setRequiresImmediate(Min: 8, Max: 15);
153 return true;
154 case 'C':
155 ++Name;
156 switch (*Name) {
157 case '0': // constant integer 0
158 info.setRequiresImmediate(0);
159 return true;
160 case 'i': // constant integer
161 case 'j': // integer constant that doesn't fit in 16 bits
162 info.setRequiresImmediate();
163 return true;
164 default:
165 break;
166 }
167 break;
168 case 'Q': // address register indirect addressing
169 case 'U': // address register indirect w/ constant offset addressing
170 // TODO: Handle 'S' (basically 'm' when pc-rel is enforced) when
171 // '-mpcrel' flag is properly handled by the driver.
172 info.setAllowsMemory();
173 return true;
174 default:
175 break;
176 }
177 return false;
178}
179
180std::optional<std::string>
181M68kTargetInfo::handleAsmEscapedChar(char EscChar) const {
182 char C;
183 switch (EscChar) {
184 case '.':
185 case '#':
186 C = EscChar;
187 break;
188 case '/':
189 C = '%';
190 break;
191 case '$':
192 C = 's';
193 break;
194 case '&':
195 C = 'd';
196 break;
197 default:
198 return std::nullopt;
199 }
200
201 return std::string(1, C);
202}
203
204std::string M68kTargetInfo::convertConstraint(const char *&Constraint) const {
205 if (*Constraint == 'C')
206 // Two-character constraint; add "^" hint for later parsing
207 return std::string("^") + std::string(Constraint++, 2);
208
209 return std::string(1, *Constraint);
210}
211
212std::string_view M68kTargetInfo::getClobbers() const {
213 // FIXME: Is this really right?
214 return "";
215}
216
217TargetInfo::BuiltinVaListKind M68kTargetInfo::getBuiltinVaListKind() const {
218 return TargetInfo::VoidPtrBuiltinVaList;
219}
220
221TargetInfo::CallingConvCheckResult
222M68kTargetInfo::checkCallingConvention(CallingConv CC) const {
223 switch (CC) {
224 case CC_C:
225 case CC_M68kRTD:
226 return CCCR_OK;
227 default:
228 return TargetInfo::checkCallingConvention(CC);
229 }
230}
231} // namespace targets
232} // namespace clang
233