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- //===---------------- ARMTargetParserCommon ---------------------*- 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
- //
- //===----------------------------------------------------------------------===//
- //
- // Code that is common to ARMTargetParser and AArch64TargetParser.
- //
- //===----------------------------------------------------------------------===//
- #include "llvm/TargetParser/ARMTargetParserCommon.h"
- #include "llvm/ADT/SmallVector.h"
- #include "llvm/ADT/StringSwitch.h"
- using namespace llvm;
- 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("v8.6a", "v8.6-a")
- .Case("v8.7a", "v8.7-a")
- .Case("v8.8a", "v8.8-a")
- .Case("v8.9a", "v8.9-a")
- .Case("v8r", "v8-r")
- .Cases("v9", "v9a", "v9-a")
- .Case("v9.1a", "v9.1-a")
- .Case("v9.2a", "v9.2-a")
- .Case("v9.3a", "v9.3-a")
- .Case("v9.4a", "v9.4-a")
- .Case("v8m.base", "v8-m.base")
- .Case("v8m.main", "v8-m.main")
- .Case("v8.1m.main", "v8.1-m.main")
- .Default(Arch);
- }
- 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("arm64e"))
- offset = 6;
- 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.contains("eb"))
- 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.contains("eb"))
- return Error;
- }
- // Arch will either be a 'v' name (v7a) or a marketing name (xscale).
- return A;
- }
- 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);
- }
- 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;
- }
- // Parse a branch protection specification, which has the form
- // standard | none | [bti,pac-ret[+b-key,+leaf]*]
- // Returns true on success, with individual elements of the specification
- // returned in `PBP`. Returns false in error, with `Err` containing
- // an erroneous part of the spec.
- bool ARM::parseBranchProtection(StringRef Spec, ParsedBranchProtection &PBP,
- StringRef &Err) {
- PBP = {"none", "a_key", false};
- if (Spec == "none")
- return true; // defaults are ok
- if (Spec == "standard") {
- PBP.Scope = "non-leaf";
- PBP.BranchTargetEnforcement = true;
- return true;
- }
- SmallVector<StringRef, 4> Opts;
- Spec.split(Opts, "+");
- for (int I = 0, E = Opts.size(); I != E; ++I) {
- StringRef Opt = Opts[I].trim();
- if (Opt == "bti") {
- PBP.BranchTargetEnforcement = true;
- continue;
- }
- if (Opt == "pac-ret") {
- PBP.Scope = "non-leaf";
- for (; I + 1 != E; ++I) {
- StringRef PACOpt = Opts[I + 1].trim();
- if (PACOpt == "leaf")
- PBP.Scope = "all";
- else if (PACOpt == "b-key")
- PBP.Key = "b_key";
- else
- break;
- }
- continue;
- }
- if (Opt == "")
- Err = "<empty>";
- else
- Err = Opt;
- return false;
- }
- return true;
- }
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