1 //===-- TargetParser - Parser for target features ---------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements a target parser to recognise hardware features such as
11 // FPU/CPU/ARCH names as well as specific support such as HDIV, etc.
13 //===----------------------------------------------------------------------===//
15 #include "llvm/Support/ARMBuildAttributes.h"
16 #include "llvm/Support/TargetParser.h"
17 #include "llvm/ADT/StringExtras.h"
18 #include "llvm/ADT/StringSwitch.h"
26 // List of canonical FPU names (use getFPUSynonym) and which architectural
27 // features they correspond to (use getFPUFeatures).
28 // FIXME: TableGen this.
29 // The entries must appear in the order listed in ARM::FPUKind for correct indexing
34 ARM::FPUVersion FPUVersion;
35 ARM::NeonSupportLevel NeonSupport;
36 ARM::FPURestriction Restriction;
38 StringRef getName() const { return StringRef(NameCStr, NameLength); }
40 #define ARM_FPU(NAME, KIND, VERSION, NEON_SUPPORT, RESTRICTION) \
41 { NAME, sizeof(NAME) - 1, KIND, VERSION, NEON_SUPPORT, RESTRICTION },
42 #include "llvm/Support/ARMTargetParser.def"
45 // List of canonical arch names (use getArchSynonym).
46 // This table also provides the build attribute fields for CPU arch
47 // and Arch ID, according to the Addenda to the ARM ABI, chapters
48 // 2.4 and 2.3.5.2 respectively.
49 // FIXME: SubArch values were simplified to fit into the expectations
50 // of the triples and are not conforming with their official names.
51 // Check to see if the expectation should be changed.
52 // FIXME: TableGen this.
57 const char *CPUAttrCStr;
59 const char *SubArchCStr;
61 ARMBuildAttrs::CPUArch ArchAttr; // Arch ID in build attributes.
63 StringRef getName() const { return StringRef(NameCStr, NameLength); }
65 // CPU class in build attributes.
66 StringRef getCPUAttr() const { return StringRef(CPUAttrCStr, CPUAttrLength); }
69 StringRef getSubArch() const { return StringRef(SubArchCStr, SubArchLength); }
71 #define ARM_ARCH(NAME, ID, CPU_ATTR, SUB_ARCH, ARCH_ATTR) \
72 {NAME, sizeof(NAME) - 1, ID, CPU_ATTR, sizeof(CPU_ATTR) - 1, SUB_ARCH, \
73 sizeof(SUB_ARCH) - 1, ARCH_ATTR},
74 #include "llvm/Support/ARMTargetParser.def"
77 // List of Arch Extension names.
78 // FIXME: TableGen this.
84 StringRef getName() const { return StringRef(NameCStr, NameLength); }
86 #define ARM_ARCH_EXT_NAME(NAME, ID) { NAME, sizeof(NAME) - 1, ID },
87 #include "llvm/Support/ARMTargetParser.def"
90 // List of HWDiv names (use getHWDivSynonym) and which architectural
91 // features they correspond to (use getHWDivFeatures).
92 // FIXME: TableGen this.
98 StringRef getName() const { return StringRef(NameCStr, NameLength); }
100 #define ARM_HW_DIV_NAME(NAME, ID) { NAME, sizeof(NAME) - 1, ID },
101 #include "llvm/Support/ARMTargetParser.def"
104 // List of CPU names and their arches.
105 // The same CPU can have multiple arches and can be default on multiple arches.
106 // When finding the Arch for a CPU, first-found prevails. Sort them accordingly.
107 // When this becomes table-generated, we'd probably need two tables.
108 // FIXME: TableGen this.
110 const char *NameCStr;
112 ARM::ArchKind ArchID;
113 ARM::FPUKind DefaultFPU;
114 bool Default; // is $Name the default CPU for $ArchID ?
116 StringRef getName() const { return StringRef(NameCStr, NameLength); }
118 #define ARM_CPU_NAME(NAME, ID, DEFAULT_FPU, IS_DEFAULT) \
119 { NAME, sizeof(NAME) - 1, ID, DEFAULT_FPU, IS_DEFAULT },
120 #include "llvm/Support/ARMTargetParser.def"
125 // ======================================================= //
127 // ======================================================= //
129 StringRef llvm::ARM::getFPUName(unsigned FPUKind) {
130 if (FPUKind >= ARM::FK_LAST)
132 return FPUNames[FPUKind].getName();
135 unsigned llvm::ARM::getFPUVersion(unsigned FPUKind) {
136 if (FPUKind >= ARM::FK_LAST)
138 return FPUNames[FPUKind].FPUVersion;
141 unsigned llvm::ARM::getFPUNeonSupportLevel(unsigned FPUKind) {
142 if (FPUKind >= ARM::FK_LAST)
144 return FPUNames[FPUKind].NeonSupport;
147 unsigned llvm::ARM::getFPURestriction(unsigned FPUKind) {
148 if (FPUKind >= ARM::FK_LAST)
150 return FPUNames[FPUKind].Restriction;
153 unsigned llvm::ARM::getDefaultFPU(StringRef CPU) {
154 for (const auto C : CPUNames) {
155 if (CPU == C.getName())
158 return ARM::FK_INVALID;
161 bool llvm::ARM::getHWDivFeatures(unsigned HWDivKind,
162 std::vector<const char *> &Features) {
164 if (HWDivKind == ARM::AEK_INVALID)
167 if (HWDivKind & ARM::AEK_HWDIVARM)
168 Features.push_back("+hwdiv-arm");
170 Features.push_back("-hwdiv-arm");
172 if (HWDivKind & ARM::AEK_HWDIV)
173 Features.push_back("+hwdiv");
175 Features.push_back("-hwdiv");
180 bool llvm::ARM::getFPUFeatures(unsigned FPUKind,
181 std::vector<const char *> &Features) {
183 if (FPUKind >= ARM::FK_LAST || FPUKind == ARM::FK_INVALID)
186 // fp-only-sp and d16 subtarget features are independent of each other, so we
187 // must enable/disable both.
188 switch (FPUNames[FPUKind].Restriction) {
190 Features.push_back("+fp-only-sp");
191 Features.push_back("+d16");
194 Features.push_back("-fp-only-sp");
195 Features.push_back("+d16");
198 Features.push_back("-fp-only-sp");
199 Features.push_back("-d16");
203 // FPU version subtarget features are inclusive of lower-numbered ones, so
204 // enable the one corresponding to this version and disable all that are
205 // higher. We also have to make sure to disable fp16 when vfp4 is disabled,
206 // as +vfp4 implies +fp16 but -vfp4 does not imply -fp16.
207 switch (FPUNames[FPUKind].FPUVersion) {
209 Features.push_back("+fp-armv8");
212 Features.push_back("+vfp4");
213 Features.push_back("-fp-armv8");
215 case ARM::FV_VFPV3_FP16:
216 Features.push_back("+vfp3");
217 Features.push_back("+fp16");
218 Features.push_back("-vfp4");
219 Features.push_back("-fp-armv8");
222 Features.push_back("+vfp3");
223 Features.push_back("-fp16");
224 Features.push_back("-vfp4");
225 Features.push_back("-fp-armv8");
228 Features.push_back("+vfp2");
229 Features.push_back("-vfp3");
230 Features.push_back("-fp16");
231 Features.push_back("-vfp4");
232 Features.push_back("-fp-armv8");
235 Features.push_back("-vfp2");
236 Features.push_back("-vfp3");
237 Features.push_back("-fp16");
238 Features.push_back("-vfp4");
239 Features.push_back("-fp-armv8");
243 // crypto includes neon, so we handle this similarly to FPU version.
244 switch (FPUNames[FPUKind].NeonSupport) {
246 Features.push_back("+crypto");
249 Features.push_back("+neon");
250 Features.push_back("-crypto");
253 Features.push_back("-neon");
254 Features.push_back("-crypto");
261 StringRef llvm::ARM::getArchName(unsigned ArchKind) {
262 if (ArchKind >= ARM::AK_LAST)
264 return ARCHNames[ArchKind].getName();
267 StringRef llvm::ARM::getCPUAttr(unsigned ArchKind) {
268 if (ArchKind >= ARM::AK_LAST)
270 return ARCHNames[ArchKind].getCPUAttr();
273 StringRef llvm::ARM::getSubArch(unsigned ArchKind) {
274 if (ArchKind >= ARM::AK_LAST)
276 return ARCHNames[ArchKind].getSubArch();
279 unsigned llvm::ARM::getArchAttr(unsigned ArchKind) {
280 if (ArchKind >= ARM::AK_LAST)
281 return ARMBuildAttrs::CPUArch::Pre_v4;
282 return ARCHNames[ArchKind].ArchAttr;
285 StringRef llvm::ARM::getArchExtName(unsigned ArchExtKind) {
286 for (const auto AE : ARCHExtNames) {
287 if (ArchExtKind == AE.ID)
293 StringRef llvm::ARM::getHWDivName(unsigned HWDivKind) {
294 for (const auto D : HWDivNames) {
295 if (HWDivKind == D.ID)
301 StringRef llvm::ARM::getDefaultCPU(StringRef Arch) {
302 unsigned AK = parseArch(Arch);
303 if (AK == ARM::AK_INVALID)
306 // Look for multiple AKs to find the default for pair AK+Name.
307 for (const auto CPU : CPUNames) {
308 if (CPU.ArchID == AK && CPU.Default)
309 return CPU.getName();
314 // ======================================================= //
316 // ======================================================= //
318 static StringRef getHWDivSynonym(StringRef HWDiv) {
319 return StringSwitch<StringRef>(HWDiv)
320 .Case("thumb,arm", "arm,thumb")
324 static StringRef getFPUSynonym(StringRef FPU) {
325 return StringSwitch<StringRef>(FPU)
326 .Cases("fpa", "fpe2", "fpe3", "maverick", "invalid") // Unsupported
327 .Case("vfp2", "vfpv2")
328 .Case("vfp3", "vfpv3")
329 .Case("vfp4", "vfpv4")
330 .Case("vfp3-d16", "vfpv3-d16")
331 .Case("vfp4-d16", "vfpv4-d16")
332 .Cases("fp4-sp-d16", "vfpv4-sp-d16", "fpv4-sp-d16")
333 .Cases("fp4-dp-d16", "fpv4-dp-d16", "vfpv4-d16")
334 .Case("fp5-sp-d16", "fpv5-sp-d16")
335 .Cases("fp5-dp-d16", "fpv5-dp-d16", "fpv5-d16")
336 // FIXME: Clang uses it, but it's bogus, since neon defaults to vfpv3.
337 .Case("neon-vfpv3", "neon")
341 static StringRef getArchSynonym(StringRef Arch) {
342 return StringSwitch<StringRef>(Arch)
343 .Case("v6sm", "v6s-m")
348 .Case("v7em", "v7e-m")
349 .Cases("v8", "v8a", "aarch64", "arm64", "v8-a")
350 .Case("v8.1a", "v8.1-a")
354 // MArch is expected to be of the form (arm|thumb)?(eb)?(v.+)?(eb)?, but
355 // (iwmmxt|xscale)(eb)? is also permitted. If the former, return
356 // "v.+", if the latter, return unmodified string, minus 'eb'.
357 // If invalid, return empty string.
358 StringRef llvm::ARM::getCanonicalArchName(StringRef Arch) {
359 size_t offset = StringRef::npos;
361 StringRef Error = "";
363 // Begins with "arm" / "thumb", move past it.
364 if (A.startswith("arm64"))
366 else if (A.startswith("arm"))
368 else if (A.startswith("thumb"))
370 else if (A.startswith("aarch64")) {
372 // AArch64 uses "_be", not "eb" suffix.
373 if (A.find("eb") != StringRef::npos)
375 if (A.substr(offset, 3) == "_be")
379 // Ex. "armebv7", move past the "eb".
380 if (offset != StringRef::npos && A.substr(offset, 2) == "eb")
382 // Or, if it ends with eb ("armv7eb"), chop it off.
383 else if (A.endswith("eb"))
384 A = A.substr(0, A.size() - 2);
386 if (offset != StringRef::npos)
387 A = A.substr(offset);
389 // Empty string means offset reached the end, which means it's valid.
393 // Only match non-marketing names
394 if (offset != StringRef::npos) {
395 // Must start with 'vN'.
396 if (A[0] != 'v' || !std::isdigit(A[1]))
398 // Can't have an extra 'eb'.
399 if (A.find("eb") != StringRef::npos)
403 // Arch will either be a 'v' name (v7a) or a marketing name (xscale).
407 unsigned llvm::ARM::parseHWDiv(StringRef HWDiv) {
408 StringRef Syn = getHWDivSynonym(HWDiv);
409 for (const auto D : HWDivNames) {
410 if (Syn == D.getName())
413 return ARM::AEK_INVALID;
416 unsigned llvm::ARM::parseFPU(StringRef FPU) {
417 StringRef Syn = getFPUSynonym(FPU);
418 for (const auto F : FPUNames) {
419 if (Syn == F.getName())
422 return ARM::FK_INVALID;
425 // Allows partial match, ex. "v7a" matches "armv7a".
426 unsigned llvm::ARM::parseArch(StringRef Arch) {
427 Arch = getCanonicalArchName(Arch);
428 StringRef Syn = getArchSynonym(Arch);
429 for (const auto A : ARCHNames) {
430 if (A.getName().endswith(Syn))
433 return ARM::AK_INVALID;
436 unsigned llvm::ARM::parseArchExt(StringRef ArchExt) {
437 for (const auto A : ARCHExtNames) {
438 if (ArchExt == A.getName())
441 return ARM::AEK_INVALID;
444 unsigned llvm::ARM::parseCPUArch(StringRef CPU) {
445 for (const auto C : CPUNames) {
446 if (CPU == C.getName())
449 return ARM::AK_INVALID;
452 // ARM, Thumb, AArch64
453 unsigned llvm::ARM::parseArchISA(StringRef Arch) {
454 return StringSwitch<unsigned>(Arch)
455 .StartsWith("aarch64", ARM::IK_AARCH64)
456 .StartsWith("arm64", ARM::IK_AARCH64)
457 .StartsWith("thumb", ARM::IK_THUMB)
458 .StartsWith("arm", ARM::IK_ARM)
459 .Default(ARM::EK_INVALID);
463 unsigned llvm::ARM::parseArchEndian(StringRef Arch) {
464 if (Arch.startswith("armeb") || Arch.startswith("thumbeb") ||
465 Arch.startswith("aarch64_be"))
468 if (Arch.startswith("arm") || Arch.startswith("thumb")) {
469 if (Arch.endswith("eb"))
472 return ARM::EK_LITTLE;
475 if (Arch.startswith("aarch64"))
476 return ARM::EK_LITTLE;
478 return ARM::EK_INVALID;
482 unsigned llvm::ARM::parseArchProfile(StringRef Arch) {
483 Arch = getCanonicalArchName(Arch);
484 switch (parseArch(Arch)) {
487 case ARM::AK_ARMV6SM:
488 case ARM::AK_ARMV7EM:
496 case ARM::AK_ARMV8_1A:
499 return ARM::PK_INVALID;
502 // Version number (ex. v7 = 7).
503 unsigned llvm::ARM::parseArchVersion(StringRef Arch) {
504 Arch = getCanonicalArchName(Arch);
505 switch (parseArch(Arch)) {
517 case ARM::AK_ARMV5TE:
519 case ARM::AK_IWMMXT2:
522 case ARM::AK_ARMV5TEJ:
527 case ARM::AK_ARMV6T2:
529 case ARM::AK_ARMV6ZK:
531 case ARM::AK_ARMV6SM:
532 case ARM::AK_ARMV6HL:
539 case ARM::AK_ARMV7HL:
541 case ARM::AK_ARMV7EM:
545 case ARM::AK_ARMV8_1A: