forked from OSchip/llvm-project
581 lines
16 KiB
C++
581 lines
16 KiB
C++
//===-- ARMTargetParser - Parser for ARM target features --------*- 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 implements a target parser to recognise ARM hardware features
|
|
// such as FPU/CPU/ARCH/extensions and specific support such as HWDIV.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Support/ARMTargetParser.h"
|
|
#include "llvm/ADT/StringSwitch.h"
|
|
#include <cctype>
|
|
|
|
using namespace llvm;
|
|
|
|
static StringRef getHWDivSynonym(StringRef HWDiv) {
|
|
return StringSwitch<StringRef>(HWDiv)
|
|
.Case("thumb,arm", "arm,thumb")
|
|
.Default(HWDiv);
|
|
}
|
|
|
|
// Allows partial match, ex. "v7a" matches "armv7a".
|
|
ARM::ArchKind ARM::parseArch(StringRef Arch) {
|
|
Arch = getCanonicalArchName(Arch);
|
|
StringRef Syn = getArchSynonym(Arch);
|
|
for (const auto A : ARCHNames) {
|
|
if (A.getName().endswith(Syn))
|
|
return A.ID;
|
|
}
|
|
return ArchKind::INVALID;
|
|
}
|
|
|
|
// Version number (ex. v7 = 7).
|
|
unsigned ARM::parseArchVersion(StringRef Arch) {
|
|
Arch = getCanonicalArchName(Arch);
|
|
switch (parseArch(Arch)) {
|
|
case ArchKind::ARMV2:
|
|
case ArchKind::ARMV2A:
|
|
return 2;
|
|
case ArchKind::ARMV3:
|
|
case ArchKind::ARMV3M:
|
|
return 3;
|
|
case ArchKind::ARMV4:
|
|
case ArchKind::ARMV4T:
|
|
return 4;
|
|
case ArchKind::ARMV5T:
|
|
case ArchKind::ARMV5TE:
|
|
case ArchKind::IWMMXT:
|
|
case ArchKind::IWMMXT2:
|
|
case ArchKind::XSCALE:
|
|
case ArchKind::ARMV5TEJ:
|
|
return 5;
|
|
case ArchKind::ARMV6:
|
|
case ArchKind::ARMV6K:
|
|
case ArchKind::ARMV6T2:
|
|
case ArchKind::ARMV6KZ:
|
|
case ArchKind::ARMV6M:
|
|
return 6;
|
|
case ArchKind::ARMV7A:
|
|
case ArchKind::ARMV7VE:
|
|
case ArchKind::ARMV7R:
|
|
case ArchKind::ARMV7M:
|
|
case ArchKind::ARMV7S:
|
|
case ArchKind::ARMV7EM:
|
|
case ArchKind::ARMV7K:
|
|
return 7;
|
|
case ArchKind::ARMV8A:
|
|
case ArchKind::ARMV8_1A:
|
|
case ArchKind::ARMV8_2A:
|
|
case ArchKind::ARMV8_3A:
|
|
case ArchKind::ARMV8_4A:
|
|
case ArchKind::ARMV8_5A:
|
|
case ArchKind::ARMV8R:
|
|
case ArchKind::ARMV8MBaseline:
|
|
case ArchKind::ARMV8MMainline:
|
|
return 8;
|
|
case ArchKind::INVALID:
|
|
return 0;
|
|
}
|
|
llvm_unreachable("Unhandled architecture");
|
|
}
|
|
|
|
// Profile A/R/M
|
|
ARM::ProfileKind ARM::parseArchProfile(StringRef Arch) {
|
|
Arch = getCanonicalArchName(Arch);
|
|
switch (parseArch(Arch)) {
|
|
case ArchKind::ARMV6M:
|
|
case ArchKind::ARMV7M:
|
|
case ArchKind::ARMV7EM:
|
|
case ArchKind::ARMV8MMainline:
|
|
case ArchKind::ARMV8MBaseline:
|
|
return ProfileKind::M;
|
|
case ArchKind::ARMV7R:
|
|
case ArchKind::ARMV8R:
|
|
return ProfileKind::R;
|
|
case ArchKind::ARMV7A:
|
|
case ArchKind::ARMV7VE:
|
|
case ArchKind::ARMV7K:
|
|
case ArchKind::ARMV8A:
|
|
case ArchKind::ARMV8_1A:
|
|
case ArchKind::ARMV8_2A:
|
|
case ArchKind::ARMV8_3A:
|
|
case ArchKind::ARMV8_4A:
|
|
case ArchKind::ARMV8_5A:
|
|
return ProfileKind::A;
|
|
case ArchKind::ARMV2:
|
|
case ArchKind::ARMV2A:
|
|
case ArchKind::ARMV3:
|
|
case ArchKind::ARMV3M:
|
|
case ArchKind::ARMV4:
|
|
case ArchKind::ARMV4T:
|
|
case ArchKind::ARMV5T:
|
|
case ArchKind::ARMV5TE:
|
|
case ArchKind::ARMV5TEJ:
|
|
case ArchKind::ARMV6:
|
|
case ArchKind::ARMV6K:
|
|
case ArchKind::ARMV6T2:
|
|
case ArchKind::ARMV6KZ:
|
|
case ArchKind::ARMV7S:
|
|
case ArchKind::IWMMXT:
|
|
case ArchKind::IWMMXT2:
|
|
case ArchKind::XSCALE:
|
|
case ArchKind::INVALID:
|
|
return ProfileKind::INVALID;
|
|
}
|
|
llvm_unreachable("Unhandled architecture");
|
|
}
|
|
|
|
StringRef ARM::getArchSynonym(StringRef Arch) {
|
|
return StringSwitch<StringRef>(Arch)
|
|
.Case("v5", "v5t")
|
|
.Case("v5e", "v5te")
|
|
.Case("v6j", "v6")
|
|
.Case("v6hl", "v6k")
|
|
.Cases("v6m", "v6sm", "v6s-m", "v6-m")
|
|
.Cases("v6z", "v6zk", "v6kz")
|
|
.Cases("v7", "v7a", "v7hl", "v7l", "v7-a")
|
|
.Case("v7r", "v7-r")
|
|
.Case("v7m", "v7-m")
|
|
.Case("v7em", "v7e-m")
|
|
.Cases("v8", "v8a", "v8l", "aarch64", "arm64", "v8-a")
|
|
.Case("v8.1a", "v8.1-a")
|
|
.Case("v8.2a", "v8.2-a")
|
|
.Case("v8.3a", "v8.3-a")
|
|
.Case("v8.4a", "v8.4-a")
|
|
.Case("v8.5a", "v8.5-a")
|
|
.Case("v8r", "v8-r")
|
|
.Case("v8m.base", "v8-m.base")
|
|
.Case("v8m.main", "v8-m.main")
|
|
.Default(Arch);
|
|
}
|
|
|
|
bool ARM::getFPUFeatures(unsigned FPUKind, std::vector<StringRef> &Features) {
|
|
|
|
if (FPUKind >= FK_LAST || FPUKind == FK_INVALID)
|
|
return false;
|
|
|
|
// fp-only-sp and d16 subtarget features are independent of each other, so we
|
|
// must enable/disable both.
|
|
switch (FPUNames[FPUKind].Restriction) {
|
|
case FPURestriction::SP_D16:
|
|
Features.push_back("+fp-only-sp");
|
|
Features.push_back("+d16");
|
|
break;
|
|
case FPURestriction::D16:
|
|
Features.push_back("-fp-only-sp");
|
|
Features.push_back("+d16");
|
|
break;
|
|
case FPURestriction::None:
|
|
Features.push_back("-fp-only-sp");
|
|
Features.push_back("-d16");
|
|
break;
|
|
}
|
|
|
|
// FPU version subtarget features are inclusive of lower-numbered ones, so
|
|
// enable the one corresponding to this version and disable all that are
|
|
// higher. We also have to make sure to disable fp16 when vfp4 is disabled,
|
|
// as +vfp4 implies +fp16 but -vfp4 does not imply -fp16.
|
|
switch (FPUNames[FPUKind].FPUVer) {
|
|
case FPUVersion::VFPV5:
|
|
Features.push_back("+fp-armv8");
|
|
break;
|
|
case FPUVersion::VFPV4:
|
|
Features.push_back("+vfp4");
|
|
Features.push_back("-fp-armv8");
|
|
break;
|
|
case FPUVersion::VFPV3_FP16:
|
|
Features.push_back("+vfp3");
|
|
Features.push_back("+fp16");
|
|
Features.push_back("-vfp4");
|
|
Features.push_back("-fp-armv8");
|
|
break;
|
|
case FPUVersion::VFPV3:
|
|
Features.push_back("+vfp3");
|
|
Features.push_back("-fp16");
|
|
Features.push_back("-vfp4");
|
|
Features.push_back("-fp-armv8");
|
|
break;
|
|
case FPUVersion::VFPV2:
|
|
Features.push_back("+vfp2");
|
|
Features.push_back("-vfp3");
|
|
Features.push_back("-fp16");
|
|
Features.push_back("-vfp4");
|
|
Features.push_back("-fp-armv8");
|
|
break;
|
|
case FPUVersion::NONE:
|
|
Features.push_back("-vfp2");
|
|
Features.push_back("-vfp3");
|
|
Features.push_back("-fp16");
|
|
Features.push_back("-vfp4");
|
|
Features.push_back("-fp-armv8");
|
|
break;
|
|
}
|
|
|
|
// crypto includes neon, so we handle this similarly to FPU version.
|
|
switch (FPUNames[FPUKind].NeonSupport) {
|
|
case NeonSupportLevel::Crypto:
|
|
Features.push_back("+neon");
|
|
Features.push_back("+crypto");
|
|
break;
|
|
case NeonSupportLevel::Neon:
|
|
Features.push_back("+neon");
|
|
Features.push_back("-crypto");
|
|
break;
|
|
case NeonSupportLevel::None:
|
|
Features.push_back("-neon");
|
|
Features.push_back("-crypto");
|
|
break;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
// Little/Big endian
|
|
ARM::EndianKind ARM::parseArchEndian(StringRef Arch) {
|
|
if (Arch.startswith("armeb") || Arch.startswith("thumbeb") ||
|
|
Arch.startswith("aarch64_be"))
|
|
return EndianKind::BIG;
|
|
|
|
if (Arch.startswith("arm") || Arch.startswith("thumb")) {
|
|
if (Arch.endswith("eb"))
|
|
return EndianKind::BIG;
|
|
else
|
|
return EndianKind::LITTLE;
|
|
}
|
|
|
|
if (Arch.startswith("aarch64") || Arch.startswith("aarch64_32"))
|
|
return EndianKind::LITTLE;
|
|
|
|
return EndianKind::INVALID;
|
|
}
|
|
|
|
// ARM, Thumb, AArch64
|
|
ARM::ISAKind ARM::parseArchISA(StringRef Arch) {
|
|
return StringSwitch<ISAKind>(Arch)
|
|
.StartsWith("aarch64", ISAKind::AARCH64)
|
|
.StartsWith("arm64", ISAKind::AARCH64)
|
|
.StartsWith("thumb", ISAKind::THUMB)
|
|
.StartsWith("arm", ISAKind::ARM)
|
|
.Default(ISAKind::INVALID);
|
|
}
|
|
|
|
unsigned ARM::parseFPU(StringRef FPU) {
|
|
StringRef Syn = getFPUSynonym(FPU);
|
|
for (const auto F : FPUNames) {
|
|
if (Syn == F.getName())
|
|
return F.ID;
|
|
}
|
|
return FK_INVALID;
|
|
}
|
|
|
|
ARM::NeonSupportLevel ARM::getFPUNeonSupportLevel(unsigned FPUKind) {
|
|
if (FPUKind >= FK_LAST)
|
|
return NeonSupportLevel::None;
|
|
return FPUNames[FPUKind].NeonSupport;
|
|
}
|
|
|
|
// MArch is expected to be of the form (arm|thumb)?(eb)?(v.+)?(eb)?, but
|
|
// (iwmmxt|xscale)(eb)? is also permitted. If the former, return
|
|
// "v.+", if the latter, return unmodified string, minus 'eb'.
|
|
// If invalid, return empty string.
|
|
StringRef ARM::getCanonicalArchName(StringRef Arch) {
|
|
size_t offset = StringRef::npos;
|
|
StringRef A = Arch;
|
|
StringRef Error = "";
|
|
|
|
// Begins with "arm" / "thumb", move past it.
|
|
if (A.startswith("arm64_32"))
|
|
offset = 8;
|
|
else if (A.startswith("arm64"))
|
|
offset = 5;
|
|
else if (A.startswith("aarch64_32"))
|
|
offset = 10;
|
|
else if (A.startswith("arm"))
|
|
offset = 3;
|
|
else if (A.startswith("thumb"))
|
|
offset = 5;
|
|
else if (A.startswith("aarch64")) {
|
|
offset = 7;
|
|
// AArch64 uses "_be", not "eb" suffix.
|
|
if (A.find("eb") != StringRef::npos)
|
|
return Error;
|
|
if (A.substr(offset, 3) == "_be")
|
|
offset += 3;
|
|
}
|
|
|
|
// Ex. "armebv7", move past the "eb".
|
|
if (offset != StringRef::npos && A.substr(offset, 2) == "eb")
|
|
offset += 2;
|
|
// Or, if it ends with eb ("armv7eb"), chop it off.
|
|
else if (A.endswith("eb"))
|
|
A = A.substr(0, A.size() - 2);
|
|
// Trim the head
|
|
if (offset != StringRef::npos)
|
|
A = A.substr(offset);
|
|
|
|
// Empty string means offset reached the end, which means it's valid.
|
|
if (A.empty())
|
|
return Arch;
|
|
|
|
// Only match non-marketing names
|
|
if (offset != StringRef::npos) {
|
|
// Must start with 'vN'.
|
|
if (A.size() >= 2 && (A[0] != 'v' || !std::isdigit(A[1])))
|
|
return Error;
|
|
// Can't have an extra 'eb'.
|
|
if (A.find("eb") != StringRef::npos)
|
|
return Error;
|
|
}
|
|
|
|
// Arch will either be a 'v' name (v7a) or a marketing name (xscale).
|
|
return A;
|
|
}
|
|
|
|
StringRef ARM::getFPUSynonym(StringRef FPU) {
|
|
return StringSwitch<StringRef>(FPU)
|
|
.Cases("fpa", "fpe2", "fpe3", "maverick", "invalid") // Unsupported
|
|
.Case("vfp2", "vfpv2")
|
|
.Case("vfp3", "vfpv3")
|
|
.Case("vfp4", "vfpv4")
|
|
.Case("vfp3-d16", "vfpv3-d16")
|
|
.Case("vfp4-d16", "vfpv4-d16")
|
|
.Cases("fp4-sp-d16", "vfpv4-sp-d16", "fpv4-sp-d16")
|
|
.Cases("fp4-dp-d16", "fpv4-dp-d16", "vfpv4-d16")
|
|
.Case("fp5-sp-d16", "fpv5-sp-d16")
|
|
.Cases("fp5-dp-d16", "fpv5-dp-d16", "fpv5-d16")
|
|
// FIXME: Clang uses it, but it's bogus, since neon defaults to vfpv3.
|
|
.Case("neon-vfpv3", "neon")
|
|
.Default(FPU);
|
|
}
|
|
|
|
StringRef ARM::getFPUName(unsigned FPUKind) {
|
|
if (FPUKind >= FK_LAST)
|
|
return StringRef();
|
|
return FPUNames[FPUKind].getName();
|
|
}
|
|
|
|
ARM::FPUVersion ARM::getFPUVersion(unsigned FPUKind) {
|
|
if (FPUKind >= FK_LAST)
|
|
return FPUVersion::NONE;
|
|
return FPUNames[FPUKind].FPUVer;
|
|
}
|
|
|
|
ARM::FPURestriction ARM::getFPURestriction(unsigned FPUKind) {
|
|
if (FPUKind >= FK_LAST)
|
|
return FPURestriction::None;
|
|
return FPUNames[FPUKind].Restriction;
|
|
}
|
|
|
|
unsigned ARM::getDefaultFPU(StringRef CPU, ARM::ArchKind AK) {
|
|
if (CPU == "generic")
|
|
return ARM::ARCHNames[static_cast<unsigned>(AK)].DefaultFPU;
|
|
|
|
return StringSwitch<unsigned>(CPU)
|
|
#define ARM_CPU_NAME(NAME, ID, DEFAULT_FPU, IS_DEFAULT, DEFAULT_EXT) \
|
|
.Case(NAME, DEFAULT_FPU)
|
|
#include "llvm/Support/ARMTargetParser.def"
|
|
.Default(ARM::FK_INVALID);
|
|
}
|
|
|
|
unsigned ARM::getDefaultExtensions(StringRef CPU, ARM::ArchKind AK) {
|
|
if (CPU == "generic")
|
|
return ARM::ARCHNames[static_cast<unsigned>(AK)].ArchBaseExtensions;
|
|
|
|
return StringSwitch<unsigned>(CPU)
|
|
#define ARM_CPU_NAME(NAME, ID, DEFAULT_FPU, IS_DEFAULT, DEFAULT_EXT) \
|
|
.Case(NAME, \
|
|
ARCHNames[static_cast<unsigned>(ArchKind::ID)].ArchBaseExtensions | \
|
|
DEFAULT_EXT)
|
|
#include "llvm/Support/ARMTargetParser.def"
|
|
.Default(ARM::AEK_INVALID);
|
|
}
|
|
|
|
bool ARM::getHWDivFeatures(unsigned HWDivKind,
|
|
std::vector<StringRef> &Features) {
|
|
|
|
if (HWDivKind == AEK_INVALID)
|
|
return false;
|
|
|
|
if (HWDivKind & AEK_HWDIVARM)
|
|
Features.push_back("+hwdiv-arm");
|
|
else
|
|
Features.push_back("-hwdiv-arm");
|
|
|
|
if (HWDivKind & AEK_HWDIVTHUMB)
|
|
Features.push_back("+hwdiv");
|
|
else
|
|
Features.push_back("-hwdiv");
|
|
|
|
return true;
|
|
}
|
|
|
|
bool ARM::getExtensionFeatures(unsigned Extensions,
|
|
std::vector<StringRef> &Features) {
|
|
|
|
if (Extensions == AEK_INVALID)
|
|
return false;
|
|
|
|
if (Extensions & AEK_CRC)
|
|
Features.push_back("+crc");
|
|
else
|
|
Features.push_back("-crc");
|
|
|
|
if (Extensions & AEK_DSP)
|
|
Features.push_back("+dsp");
|
|
else
|
|
Features.push_back("-dsp");
|
|
|
|
if (Extensions & AEK_FP16FML)
|
|
Features.push_back("+fp16fml");
|
|
else
|
|
Features.push_back("-fp16fml");
|
|
|
|
if (Extensions & AEK_RAS)
|
|
Features.push_back("+ras");
|
|
else
|
|
Features.push_back("-ras");
|
|
|
|
if (Extensions & AEK_DOTPROD)
|
|
Features.push_back("+dotprod");
|
|
else
|
|
Features.push_back("-dotprod");
|
|
|
|
return getHWDivFeatures(Extensions, Features);
|
|
}
|
|
|
|
StringRef ARM::getArchName(ARM::ArchKind AK) {
|
|
return ARCHNames[static_cast<unsigned>(AK)].getName();
|
|
}
|
|
|
|
StringRef ARM::getCPUAttr(ARM::ArchKind AK) {
|
|
return ARCHNames[static_cast<unsigned>(AK)].getCPUAttr();
|
|
}
|
|
|
|
StringRef ARM::getSubArch(ARM::ArchKind AK) {
|
|
return ARCHNames[static_cast<unsigned>(AK)].getSubArch();
|
|
}
|
|
|
|
unsigned ARM::getArchAttr(ARM::ArchKind AK) {
|
|
return ARCHNames[static_cast<unsigned>(AK)].ArchAttr;
|
|
}
|
|
|
|
StringRef ARM::getArchExtName(unsigned ArchExtKind) {
|
|
for (const auto AE : ARCHExtNames) {
|
|
if (ArchExtKind == AE.ID)
|
|
return AE.getName();
|
|
}
|
|
return StringRef();
|
|
}
|
|
|
|
StringRef ARM::getArchExtFeature(StringRef ArchExt) {
|
|
if (ArchExt.startswith("no")) {
|
|
StringRef ArchExtBase(ArchExt.substr(2));
|
|
for (const auto AE : ARCHExtNames) {
|
|
if (AE.NegFeature && ArchExtBase == AE.getName())
|
|
return StringRef(AE.NegFeature);
|
|
}
|
|
}
|
|
for (const auto AE : ARCHExtNames) {
|
|
if (AE.Feature && ArchExt == AE.getName())
|
|
return StringRef(AE.Feature);
|
|
}
|
|
|
|
return StringRef();
|
|
}
|
|
|
|
StringRef ARM::getHWDivName(unsigned HWDivKind) {
|
|
for (const auto D : HWDivNames) {
|
|
if (HWDivKind == D.ID)
|
|
return D.getName();
|
|
}
|
|
return StringRef();
|
|
}
|
|
|
|
StringRef ARM::getDefaultCPU(StringRef Arch) {
|
|
ArchKind AK = parseArch(Arch);
|
|
if (AK == ArchKind::INVALID)
|
|
return StringRef();
|
|
|
|
// Look for multiple AKs to find the default for pair AK+Name.
|
|
for (const auto CPU : CPUNames) {
|
|
if (CPU.ArchID == AK && CPU.Default)
|
|
return CPU.getName();
|
|
}
|
|
|
|
// If we can't find a default then target the architecture instead
|
|
return "generic";
|
|
}
|
|
|
|
unsigned ARM::parseHWDiv(StringRef HWDiv) {
|
|
StringRef Syn = getHWDivSynonym(HWDiv);
|
|
for (const auto D : HWDivNames) {
|
|
if (Syn == D.getName())
|
|
return D.ID;
|
|
}
|
|
return AEK_INVALID;
|
|
}
|
|
|
|
unsigned ARM::parseArchExt(StringRef ArchExt) {
|
|
for (const auto A : ARCHExtNames) {
|
|
if (ArchExt == A.getName())
|
|
return A.ID;
|
|
}
|
|
return AEK_INVALID;
|
|
}
|
|
|
|
ARM::ArchKind ARM::parseCPUArch(StringRef CPU) {
|
|
for (const auto C : CPUNames) {
|
|
if (CPU == C.getName())
|
|
return C.ArchID;
|
|
}
|
|
return ArchKind::INVALID;
|
|
}
|
|
|
|
void ARM::fillValidCPUArchList(SmallVectorImpl<StringRef> &Values) {
|
|
for (const CpuNames<ArchKind> &Arch : CPUNames) {
|
|
if (Arch.ArchID != ArchKind::INVALID)
|
|
Values.push_back(Arch.getName());
|
|
}
|
|
}
|
|
|
|
StringRef ARM::computeDefaultTargetABI(const Triple &TT, StringRef CPU) {
|
|
StringRef ArchName =
|
|
CPU.empty() ? TT.getArchName() : getArchName(parseCPUArch(CPU));
|
|
|
|
if (TT.isOSBinFormatMachO()) {
|
|
if (TT.getEnvironment() == Triple::EABI ||
|
|
TT.getOS() == Triple::UnknownOS ||
|
|
parseArchProfile(ArchName) == ProfileKind::M)
|
|
return "aapcs";
|
|
if (TT.isWatchABI())
|
|
return "aapcs16";
|
|
return "apcs-gnu";
|
|
} else if (TT.isOSWindows())
|
|
// FIXME: this is invalid for WindowsCE.
|
|
return "aapcs";
|
|
|
|
// Select the default based on the platform.
|
|
switch (TT.getEnvironment()) {
|
|
case Triple::Android:
|
|
case Triple::GNUEABI:
|
|
case Triple::GNUEABIHF:
|
|
case Triple::MuslEABI:
|
|
case Triple::MuslEABIHF:
|
|
return "aapcs-linux";
|
|
case Triple::EABIHF:
|
|
case Triple::EABI:
|
|
return "aapcs";
|
|
default:
|
|
if (TT.isOSNetBSD())
|
|
return "apcs-gnu";
|
|
if (TT.isOSOpenBSD())
|
|
return "aapcs-linux";
|
|
return "aapcs";
|
|
}
|
|
}
|