1//===--- PPC.h - Declare PPC 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 PPC TargetInfo objects.
10//
11//===----------------------------------------------------------------------===//
12
13#ifndef LLVM_CLANG_LIB_BASIC_TARGETS_PPC_H
14#define LLVM_CLANG_LIB_BASIC_TARGETS_PPC_H
15
16#include "OSTargets.h"
17#include "clang/Basic/TargetInfo.h"
18#include "clang/Basic/TargetOptions.h"
19#include "llvm/ADT/StringSwitch.h"
20#include "llvm/Support/Compiler.h"
21#include "llvm/TargetParser/Triple.h"
22
23namespace clang {
24namespace targets {
25
26// PPC abstract base class
27class LLVM_LIBRARY_VISIBILITY PPCTargetInfo : public TargetInfo {
28
29 /// Flags for architecture specific defines.
30 typedef enum {
31 ArchDefineNone = 0,
32 ArchDefineName = 1 << 0, // <name> is substituted for arch name.
33 ArchDefinePpcgr = 1 << 1,
34 ArchDefinePpcsq = 1 << 2,
35 ArchDefine440 = 1 << 3,
36 ArchDefine603 = 1 << 4,
37 ArchDefine604 = 1 << 5,
38 ArchDefinePwr4 = 1 << 6,
39 ArchDefinePwr5 = 1 << 7,
40 ArchDefinePwr5x = 1 << 8,
41 ArchDefinePwr6 = 1 << 9,
42 ArchDefinePwr6x = 1 << 10,
43 ArchDefinePwr7 = 1 << 11,
44 ArchDefinePwr8 = 1 << 12,
45 ArchDefinePwr9 = 1 << 13,
46 ArchDefinePwr10 = 1 << 14,
47 ArchDefinePwr11 = 1 << 15,
48 ArchDefineFuture = 1 << 16,
49 ArchDefineA2 = 1 << 17,
50 ArchDefineE500 = 1 << 18
51 } ArchDefineTypes;
52
53 ArchDefineTypes ArchDefs = ArchDefineNone;
54 static const char *const GCCRegNames[];
55 static const TargetInfo::GCCRegAlias GCCRegAliases[];
56 std::string CPU;
57 enum PPCFloatABI { HardFloat, SoftFloat } FloatABI;
58
59 // Target cpu features.
60 bool HasAltivec = false;
61 bool HasMMA = false;
62 bool HasROPProtect = false;
63 bool HasVSX = false;
64 bool HasP8Vector = false;
65 bool HasP8Crypto = false;
66 bool HasHTM = false;
67 bool HasP9Vector = false;
68 bool HasSPE = false;
69 bool HasFrsqrte = false;
70 bool HasFrsqrtes = false;
71 bool HasP10Vector = false;
72 bool HasPCRelativeMemops = false;
73 bool HasQuadwordAtomics = false;
74 bool UseLongCalls = false;
75
76protected:
77 std::string ABI;
78
79public:
80 PPCTargetInfo(const llvm::Triple &Triple, const TargetOptions &)
81 : TargetInfo(Triple) {
82 SuitableAlign = 128;
83 LongDoubleWidth = LongDoubleAlign = 128;
84 LongDoubleFormat = &llvm::APFloat::PPCDoubleDouble();
85 HasStrictFP = true;
86 HasIbm128 = true;
87 HasUnalignedAccess = true;
88 }
89
90 // Set the language option for altivec based on our value.
91 void adjust(DiagnosticsEngine &Diags, LangOptions &Opts) override;
92
93 // Note: GCC recognizes the following additional cpus:
94 // 401, 403, 405, 405fp, 440fp, 464, 464fp, 476, 476fp, 505, 740, 801,
95 // 821, 823, 8540, e300c2, e300c3, e500mc64, e6500, 860, cell, titan, rs64.
96 bool isValidCPUName(StringRef Name) const override;
97 void fillValidCPUList(SmallVectorImpl<StringRef> &Values) const override;
98
99 bool setCPU(const std::string &Name) override {
100 bool CPUKnown = isValidCPUName(Name);
101 if (CPUKnown) {
102 CPU = Name;
103
104 // CPU identification.
105 ArchDefs =
106 (ArchDefineTypes)llvm::StringSwitch<int>(CPU)
107 .Case(S: "440", Value: ArchDefineName)
108 .Case(S: "450", Value: ArchDefineName | ArchDefine440)
109 .Case(S: "601", Value: ArchDefineName)
110 .Case(S: "602", Value: ArchDefineName | ArchDefinePpcgr)
111 .Case(S: "603", Value: ArchDefineName | ArchDefinePpcgr)
112 .Case(S: "603e", Value: ArchDefineName | ArchDefine603 | ArchDefinePpcgr)
113 .Case(S: "603ev", Value: ArchDefineName | ArchDefine603 | ArchDefinePpcgr)
114 .Case(S: "604", Value: ArchDefineName | ArchDefinePpcgr)
115 .Case(S: "604e", Value: ArchDefineName | ArchDefine604 | ArchDefinePpcgr)
116 .Case(S: "620", Value: ArchDefineName | ArchDefinePpcgr)
117 .Case(S: "630", Value: ArchDefineName | ArchDefinePpcgr)
118 .Case(S: "7400", Value: ArchDefineName | ArchDefinePpcgr)
119 .Case(S: "7450", Value: ArchDefineName | ArchDefinePpcgr)
120 .Case(S: "750", Value: ArchDefineName | ArchDefinePpcgr)
121 .Case(S: "970", Value: ArchDefineName | ArchDefinePwr4 | ArchDefinePpcgr |
122 ArchDefinePpcsq)
123 .Case(S: "a2", Value: ArchDefineA2)
124 .Cases(S0: "power3", S1: "pwr3", Value: ArchDefinePpcgr)
125 .Cases(S0: "power4", S1: "pwr4",
126 Value: ArchDefinePwr4 | ArchDefinePpcgr | ArchDefinePpcsq)
127 .Cases(S0: "power5", S1: "pwr5",
128 Value: ArchDefinePwr5 | ArchDefinePwr4 | ArchDefinePpcgr |
129 ArchDefinePpcsq)
130 .Cases(S0: "power5x", S1: "pwr5x",
131 Value: ArchDefinePwr5x | ArchDefinePwr5 | ArchDefinePwr4 |
132 ArchDefinePpcgr | ArchDefinePpcsq)
133 .Cases(S0: "power6", S1: "pwr6",
134 Value: ArchDefinePwr6 | ArchDefinePwr5x | ArchDefinePwr5 |
135 ArchDefinePwr4 | ArchDefinePpcgr | ArchDefinePpcsq)
136 .Cases(S0: "power6x", S1: "pwr6x",
137 Value: ArchDefinePwr6x | ArchDefinePwr6 | ArchDefinePwr5x |
138 ArchDefinePwr5 | ArchDefinePwr4 | ArchDefinePpcgr |
139 ArchDefinePpcsq)
140 .Cases(S0: "power7", S1: "pwr7",
141 Value: ArchDefinePwr7 | ArchDefinePwr6 | ArchDefinePwr5x |
142 ArchDefinePwr5 | ArchDefinePwr4 | ArchDefinePpcgr |
143 ArchDefinePpcsq)
144 // powerpc64le automatically defaults to at least power8.
145 .Cases(S0: "power8", S1: "pwr8", S2: "ppc64le",
146 Value: ArchDefinePwr8 | ArchDefinePwr7 | ArchDefinePwr6 |
147 ArchDefinePwr5x | ArchDefinePwr5 | ArchDefinePwr4 |
148 ArchDefinePpcgr | ArchDefinePpcsq)
149 .Cases(S0: "power9", S1: "pwr9",
150 Value: ArchDefinePwr9 | ArchDefinePwr8 | ArchDefinePwr7 |
151 ArchDefinePwr6 | ArchDefinePwr5x | ArchDefinePwr5 |
152 ArchDefinePwr4 | ArchDefinePpcgr | ArchDefinePpcsq)
153 .Cases(S0: "power10", S1: "pwr10",
154 Value: ArchDefinePwr10 | ArchDefinePwr9 | ArchDefinePwr8 |
155 ArchDefinePwr7 | ArchDefinePwr6 | ArchDefinePwr5x |
156 ArchDefinePwr5 | ArchDefinePwr4 | ArchDefinePpcgr |
157 ArchDefinePpcsq)
158 .Cases(S0: "power11", S1: "pwr11",
159 Value: ArchDefinePwr11 | ArchDefinePwr10 | ArchDefinePwr9 |
160 ArchDefinePwr8 | ArchDefinePwr7 | ArchDefinePwr6 |
161 ArchDefinePwr5x | ArchDefinePwr5 | ArchDefinePwr4 |
162 ArchDefinePpcgr | ArchDefinePpcsq)
163 .Case(S: "future",
164 Value: ArchDefineFuture | ArchDefinePwr11 | ArchDefinePwr10 |
165 ArchDefinePwr9 | ArchDefinePwr8 | ArchDefinePwr7 |
166 ArchDefinePwr6 | ArchDefinePwr5x | ArchDefinePwr5 |
167 ArchDefinePwr4 | ArchDefinePpcgr | ArchDefinePpcsq)
168 .Cases(S0: "8548", S1: "e500", Value: ArchDefineE500)
169 .Default(Value: ArchDefineNone);
170 }
171 return CPUKnown;
172 }
173
174 StringRef getABI() const override { return ABI; }
175
176 llvm::SmallVector<Builtin::InfosShard> getTargetBuiltins() const override;
177
178 bool isCLZForZeroUndef() const override { return false; }
179
180 void getTargetDefines(const LangOptions &Opts,
181 MacroBuilder &Builder) const override;
182
183 bool
184 initFeatureMap(llvm::StringMap<bool> &Features, DiagnosticsEngine &Diags,
185 StringRef CPU,
186 const std::vector<std::string> &FeaturesVec) const override;
187
188 void addP10SpecificFeatures(llvm::StringMap<bool> &Features) const;
189 void addP11SpecificFeatures(llvm::StringMap<bool> &Features) const;
190 void addFutureSpecificFeatures(llvm::StringMap<bool> &Features) const;
191
192 bool handleTargetFeatures(std::vector<std::string> &Features,
193 DiagnosticsEngine &Diags) override;
194
195 bool hasFeature(StringRef Feature) const override;
196
197 void setFeatureEnabled(llvm::StringMap<bool> &Features, StringRef Name,
198 bool Enabled) const override;
199
200 bool supportsTargetAttributeTune() const override { return true; }
201
202 ArrayRef<const char *> getGCCRegNames() const override;
203
204 ArrayRef<TargetInfo::GCCRegAlias> getGCCRegAliases() const override;
205
206 ArrayRef<TargetInfo::AddlRegName> getGCCAddlRegNames() const override;
207
208 bool validateAsmConstraint(const char *&Name,
209 TargetInfo::ConstraintInfo &Info) const override {
210 switch (*Name) {
211 default:
212 return false;
213 case 'O': // Zero
214 break;
215 case 'f': // Floating point register
216 // Don't use floating point registers on soft float ABI.
217 if (FloatABI == SoftFloat)
218 return false;
219 [[fallthrough]];
220 case 'b': // Base register
221 Info.setAllowsRegister();
222 break;
223 // FIXME: The following are added to allow parsing.
224 // I just took a guess at what the actions should be.
225 // Also, is more specific checking needed? I.e. specific registers?
226 case 'd': // Floating point register (containing 64-bit value)
227 case 'v': // Altivec vector register
228 // Don't use floating point and altivec vector registers
229 // on soft float ABI
230 if (FloatABI == SoftFloat)
231 return false;
232 Info.setAllowsRegister();
233 break;
234 case 'w':
235 switch (Name[1]) {
236 case 'd': // VSX vector register to hold vector double data
237 case 'f': // VSX vector register to hold vector float data
238 case 's': // VSX vector register to hold scalar double data
239 case 'w': // VSX vector register to hold scalar double data
240 case 'a': // Any VSX register
241 case 'c': // An individual CR bit
242 case 'i': // FP or VSX register to hold 64-bit integers data
243 break;
244 default:
245 return false;
246 }
247 Info.setAllowsRegister();
248 Name++; // Skip over 'w'.
249 break;
250 case 'h': // `MQ', `CTR', or `LINK' register
251 case 'q': // `MQ' register
252 case 'c': // `CTR' register
253 case 'l': // `LINK' register
254 case 'x': // `CR' register (condition register) number 0
255 case 'y': // `CR' register (condition register)
256 case 'z': // `XER[CA]' carry bit (part of the XER register)
257 Info.setAllowsRegister();
258 break;
259 case 'I': // Signed 16-bit constant
260 case 'J': // Unsigned 16-bit constant shifted left 16 bits
261 // (use `L' instead for SImode constants)
262 case 'K': // Unsigned 16-bit constant
263 case 'L': // Signed 16-bit constant shifted left 16 bits
264 case 'M': // Constant larger than 31
265 case 'N': // Exact power of 2
266 case 'P': // Constant whose negation is a signed 16-bit constant
267 case 'G': // Floating point constant that can be loaded into a
268 // register with one instruction per word
269 case 'H': // Integer/Floating point constant that can be loaded
270 // into a register using three instructions
271 break;
272 case 'm': // Memory operand. Note that on PowerPC targets, m can
273 // include addresses that update the base register. It
274 // is therefore only safe to use `m' in an asm statement
275 // if that asm statement accesses the operand exactly once.
276 // The asm statement must also use `%U<opno>' as a
277 // placeholder for the "update" flag in the corresponding
278 // load or store instruction. For example:
279 // asm ("st%U0 %1,%0" : "=m" (mem) : "r" (val));
280 // is correct but:
281 // asm ("st %1,%0" : "=m" (mem) : "r" (val));
282 // is not. Use es rather than m if you don't want the base
283 // register to be updated.
284 case 'e':
285 if (Name[1] != 's')
286 return false;
287 // es: A "stable" memory operand; that is, one which does not
288 // include any automodification of the base register. Unlike
289 // `m', this constraint can be used in asm statements that
290 // might access the operand several times, or that might not
291 // access it at all.
292 Info.setAllowsMemory();
293 Name++; // Skip over 'e'.
294 break;
295 case 'Q': // Memory operand that is an offset from a register (it is
296 // usually better to use `m' or `es' in asm statements)
297 Info.setAllowsRegister();
298 [[fallthrough]];
299 case 'Z': // Memory operand that is an indexed or indirect from a
300 // register (it is usually better to use `m' or `es' in
301 // asm statements)
302 Info.setAllowsMemory();
303 break;
304 case 'a': // Address operand that is an indexed or indirect from a
305 // register (`p' is preferable for asm statements)
306 // TODO: Add full support for this constraint
307 return false;
308 case 'R': // AIX TOC entry
309 case 'S': // Constant suitable as a 64-bit mask operand
310 case 'T': // Constant suitable as a 32-bit mask operand
311 case 'U': // System V Release 4 small data area reference
312 case 't': // AND masks that can be performed by two rldic{l, r}
313 // instructions
314 case 'W': // Vector constant that does not require memory
315 case 'j': // Vector constant that is all zeros.
316 break;
317 // End FIXME.
318 }
319 return true;
320 }
321
322 std::string convertConstraint(const char *&Constraint) const override {
323 std::string R;
324 switch (*Constraint) {
325 case 'e':
326 case 'w':
327 // Two-character constraint; add "^" hint for later parsing.
328 R = std::string("^") + std::string(Constraint, 2);
329 Constraint++;
330 break;
331 default:
332 return TargetInfo::convertConstraint(Constraint);
333 }
334 return R;
335 }
336
337 std::string_view getClobbers() const override { return ""; }
338 int getEHDataRegisterNumber(unsigned RegNo) const override {
339 if (RegNo == 0)
340 return 3;
341 if (RegNo == 1)
342 return 4;
343 return -1;
344 }
345
346 bool hasSjLjLowering() const override { return true; }
347
348 const char *getLongDoubleMangling() const override {
349 if (LongDoubleWidth == 64)
350 return "e";
351 return LongDoubleFormat == &llvm::APFloat::PPCDoubleDouble()
352 ? "g"
353 : "u9__ieee128";
354 }
355 const char *getFloat128Mangling() const override { return "u9__ieee128"; }
356 const char *getIbm128Mangling() const override { return "g"; }
357
358 bool hasBitIntType() const override { return true; }
359
360 bool isSPRegName(StringRef RegName) const override {
361 return RegName == "r1" || RegName == "x1";
362 }
363
364 // We support __builtin_cpu_supports/__builtin_cpu_is on targets that
365 // have Glibc since it is Glibc that provides the HWCAP[2] in the auxv.
366 static constexpr int MINIMUM_AIX_OS_MAJOR = 7;
367 static constexpr int MINIMUM_AIX_OS_MINOR = 2;
368 bool supportsCpuSupports() const override {
369 llvm::Triple Triple = getTriple();
370 // AIX 7.2 is the minimum requirement to support __builtin_cpu_supports().
371 return Triple.isOSGlibc() ||
372 (Triple.isOSAIX() &&
373 !Triple.isOSVersionLT(Major: MINIMUM_AIX_OS_MAJOR, Minor: MINIMUM_AIX_OS_MINOR));
374 }
375
376 bool supportsCpuIs() const override {
377 llvm::Triple Triple = getTriple();
378 // AIX 7.2 is the minimum requirement to support __builtin_cpu_is().
379 return Triple.isOSGlibc() ||
380 (Triple.isOSAIX() &&
381 !Triple.isOSVersionLT(Major: MINIMUM_AIX_OS_MAJOR, Minor: MINIMUM_AIX_OS_MINOR));
382 }
383 bool validateCpuSupports(StringRef Feature) const override;
384 bool validateCpuIs(StringRef Name) const override;
385};
386
387class LLVM_LIBRARY_VISIBILITY PPC32TargetInfo : public PPCTargetInfo {
388public:
389 PPC32TargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
390 : PPCTargetInfo(Triple, Opts) {
391 if (Triple.isOSAIX())
392 resetDataLayout(DL: "E-m:a-p:32:32-Fi32-i64:64-n32");
393 else if (Triple.getArch() == llvm::Triple::ppcle)
394 resetDataLayout(DL: "e-m:e-p:32:32-Fn32-i64:64-n32");
395 else
396 resetDataLayout(DL: "E-m:e-p:32:32-Fn32-i64:64-n32");
397
398 switch (getTriple().getOS()) {
399 case llvm::Triple::Linux:
400 case llvm::Triple::FreeBSD:
401 case llvm::Triple::NetBSD:
402 SizeType = UnsignedInt;
403 PtrDiffType = SignedInt;
404 IntPtrType = SignedInt;
405 break;
406 case llvm::Triple::AIX:
407 SizeType = UnsignedLong;
408 PtrDiffType = SignedLong;
409 IntPtrType = SignedLong;
410 LongDoubleWidth = 64;
411 LongDoubleAlign = DoubleAlign = 32;
412 LongDoubleFormat = &llvm::APFloat::IEEEdouble();
413 break;
414 default:
415 break;
416 }
417
418 if (Triple.isOSFreeBSD() || Triple.isOSNetBSD() || Triple.isOSOpenBSD() ||
419 Triple.isMusl()) {
420 LongDoubleWidth = LongDoubleAlign = 64;
421 LongDoubleFormat = &llvm::APFloat::IEEEdouble();
422 }
423
424 // PPC32 supports atomics up to 4 bytes.
425 MaxAtomicPromoteWidth = MaxAtomicInlineWidth = 32;
426 }
427
428 BuiltinVaListKind getBuiltinVaListKind() const override {
429 // This is the ELF definition
430 return TargetInfo::PowerABIBuiltinVaList;
431 }
432
433 std::pair<unsigned, unsigned> hardwareInterferenceSizes() const override {
434 return std::make_pair(x: 32, y: 32);
435 }
436};
437
438// Note: ABI differences may eventually require us to have a separate
439// TargetInfo for little endian.
440class LLVM_LIBRARY_VISIBILITY PPC64TargetInfo : public PPCTargetInfo {
441public:
442 PPC64TargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
443 : PPCTargetInfo(Triple, Opts) {
444 LongWidth = LongAlign = PointerWidth = PointerAlign = 64;
445 IntMaxType = SignedLong;
446 Int64Type = SignedLong;
447 std::string DataLayout;
448
449 if (Triple.isOSAIX()) {
450 // TODO: Set appropriate ABI for AIX platform.
451 DataLayout = "E-m:a-Fi64-i64:64-i128:128-n32:64";
452 LongDoubleWidth = 64;
453 LongDoubleAlign = DoubleAlign = 32;
454 LongDoubleFormat = &llvm::APFloat::IEEEdouble();
455 } else if ((Triple.getArch() == llvm::Triple::ppc64le)) {
456 DataLayout = "e-m:e-Fn32-i64:64-i128:128-n32:64";
457 ABI = "elfv2";
458 } else {
459 DataLayout = "E-m:e";
460 if (Triple.isPPC64ELFv2ABI()) {
461 ABI = "elfv2";
462 DataLayout += "-Fn32";
463 } else {
464 ABI = "elfv1";
465 DataLayout += "-Fi64";
466 }
467 DataLayout += "-i64:64-i128:128-n32:64";
468 }
469
470 if (Triple.isOSFreeBSD() || Triple.isOSOpenBSD() || Triple.isMusl()) {
471 LongDoubleWidth = LongDoubleAlign = 64;
472 LongDoubleFormat = &llvm::APFloat::IEEEdouble();
473 }
474
475 if (Triple.isOSAIX() || Triple.isOSLinux())
476 DataLayout += "-S128-v256:256:256-v512:512:512";
477 resetDataLayout(DL: DataLayout);
478
479 // Newer PPC64 instruction sets support atomics up to 16 bytes.
480 MaxAtomicPromoteWidth = 128;
481 // Baseline PPC64 supports inlining atomics up to 8 bytes.
482 MaxAtomicInlineWidth = 64;
483 }
484
485 void setMaxAtomicWidth() override {
486 // For power8 and up, backend is able to inline 16-byte atomic lock free
487 // code.
488 // TODO: We should allow AIX to inline quadword atomics in the future.
489 if (!getTriple().isOSAIX() && hasFeature(Feature: "quadword-atomics"))
490 MaxAtomicInlineWidth = 128;
491 }
492
493 BuiltinVaListKind getBuiltinVaListKind() const override {
494 return TargetInfo::CharPtrBuiltinVaList;
495 }
496
497 // PPC64 Linux-specific ABI options.
498 bool setABI(const std::string &Name) override {
499 if (Name == "elfv1" || Name == "elfv2") {
500 ABI = Name;
501 return true;
502 }
503 return false;
504 }
505
506 CallingConvCheckResult checkCallingConvention(CallingConv CC) const override {
507 switch (CC) {
508 case CC_Swift:
509 return CCCR_OK;
510 case CC_SwiftAsync:
511 return CCCR_Error;
512 default:
513 return CCCR_Warning;
514 }
515 }
516
517 std::pair<unsigned, unsigned> hardwareInterferenceSizes() const override {
518 return std::make_pair(x: 128, y: 128);
519 }
520};
521
522class LLVM_LIBRARY_VISIBILITY AIXPPC32TargetInfo :
523 public AIXTargetInfo<PPC32TargetInfo> {
524public:
525 using AIXTargetInfo::AIXTargetInfo;
526 BuiltinVaListKind getBuiltinVaListKind() const override {
527 return TargetInfo::CharPtrBuiltinVaList;
528 }
529};
530
531class LLVM_LIBRARY_VISIBILITY AIXPPC64TargetInfo :
532 public AIXTargetInfo<PPC64TargetInfo> {
533public:
534 using AIXTargetInfo::AIXTargetInfo;
535};
536
537} // namespace targets
538} // namespace clang
539#endif // LLVM_CLANG_LIB_BASIC_TARGETS_PPC_H
540

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source code of clang/lib/Basic/Targets/PPC.h