1 files changed, 296 insertions, 0 deletions

diff --git a/contrib/llvm-project/clang/lib/Basic/Targets/Mips.cpp b/contrib/llvm-project/clang/lib/Basic/Targets/Mips.cpp
new file mode 100644
index 000000000000..b9ab80df6194
--- /dev/null
+++ b/contrib/llvm-project/clang/lib/Basic/Targets/Mips.cpp
@@ -0,0 +1,296 @@
+//===--- Mips.cpp - Implement Mips target feature support -----------------===//
+//
+// 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 Mips TargetInfo objects.
+//
+//===----------------------------------------------------------------------===//
+
+#include "Mips.h"
+#include "Targets.h"
+#include "clang/Basic/Diagnostic.h"
+#include "clang/Basic/MacroBuilder.h"
+#include "clang/Basic/TargetBuiltins.h"
+#include "llvm/ADT/StringSwitch.h"
+
+using namespace clang;
+using namespace clang::targets;
+
+const Builtin::Info MipsTargetInfo::BuiltinInfo[] = {
+#define BUILTIN(ID, TYPE, ATTRS)                                               \
+  {#ID, TYPE, ATTRS, nullptr, ALL_LANGUAGES, nullptr},
+#define LIBBUILTIN(ID, TYPE, ATTRS, HEADER)                                    \
+  {#ID, TYPE, ATTRS, HEADER, ALL_LANGUAGES, nullptr},
+#include "clang/Basic/BuiltinsMips.def"
+};
+
+bool MipsTargetInfo::processorSupportsGPR64() const {
+  return llvm::StringSwitch<bool>(CPU)
+      .Case("mips3", true)
+      .Case("mips4", true)
+      .Case("mips5", true)
+      .Case("mips64", true)
+      .Case("mips64r2", true)
+      .Case("mips64r3", true)
+      .Case("mips64r5", true)
+      .Case("mips64r6", true)
+      .Case("octeon", true)
+      .Case("octeon+", true)
+      .Default(false);
+  return false;
+}
+
+static constexpr llvm::StringLiteral ValidCPUNames[] = {
+    {"mips1"},  {"mips2"},    {"mips3"},    {"mips4"},    {"mips5"},
+    {"mips32"}, {"mips32r2"}, {"mips32r3"}, {"mips32r5"}, {"mips32r6"},
+    {"mips64"}, {"mips64r2"}, {"mips64r3"}, {"mips64r5"}, {"mips64r6"},
+    {"octeon"}, {"octeon+"}, {"p5600"}};
+
+bool MipsTargetInfo::isValidCPUName(StringRef Name) const {
+  return llvm::find(ValidCPUNames, Name) != std::end(ValidCPUNames);
+}
+
+void MipsTargetInfo::fillValidCPUList(
+    SmallVectorImpl<StringRef> &Values) const {
+  Values.append(std::begin(ValidCPUNames), std::end(ValidCPUNames));
+}
+
+unsigned MipsTargetInfo::getISARev() const {
+  return llvm::StringSwitch<unsigned>(getCPU())
+             .Cases("mips32", "mips64", 1)
+             .Cases("mips32r2", "mips64r2", "octeon", "octeon+", 2)
+             .Cases("mips32r3", "mips64r3", 3)
+             .Cases("mips32r5", "mips64r5", 5)
+             .Cases("mips32r6", "mips64r6", 6)
+             .Default(0);
+}
+
+void MipsTargetInfo::getTargetDefines(const LangOptions &Opts,
+                                      MacroBuilder &Builder) const {
+  if (BigEndian) {
+    DefineStd(Builder, "MIPSEB", Opts);
+    Builder.defineMacro("_MIPSEB");
+  } else {
+    DefineStd(Builder, "MIPSEL", Opts);
+    Builder.defineMacro("_MIPSEL");
+  }
+
+  Builder.defineMacro("__mips__");
+  Builder.defineMacro("_mips");
+  if (Opts.GNUMode)
+    Builder.defineMacro("mips");
+
+  if (ABI == "o32") {
+    Builder.defineMacro("__mips", "32");
+    Builder.defineMacro("_MIPS_ISA", "_MIPS_ISA_MIPS32");
+  } else {
+    Builder.defineMacro("__mips", "64");
+    Builder.defineMacro("__mips64");
+    Builder.defineMacro("__mips64__");
+    Builder.defineMacro("_MIPS_ISA", "_MIPS_ISA_MIPS64");
+  }
+
+  const std::string ISARev = std::to_string(getISARev());
+
+  if (!ISARev.empty())
+    Builder.defineMacro("__mips_isa_rev", ISARev);
+
+  if (ABI == "o32") {
+    Builder.defineMacro("__mips_o32");
+    Builder.defineMacro("_ABIO32", "1");
+    Builder.defineMacro("_MIPS_SIM", "_ABIO32");
+  } else if (ABI == "n32") {
+    Builder.defineMacro("__mips_n32");
+    Builder.defineMacro("_ABIN32", "2");
+    Builder.defineMacro("_MIPS_SIM", "_ABIN32");
+  } else if (ABI == "n64") {
+    Builder.defineMacro("__mips_n64");
+    Builder.defineMacro("_ABI64", "3");
+    Builder.defineMacro("_MIPS_SIM", "_ABI64");
+  } else
+    llvm_unreachable("Invalid ABI.");
+
+  if (!IsNoABICalls) {
+    Builder.defineMacro("__mips_abicalls");
+    if (CanUseBSDABICalls)
+      Builder.defineMacro("__ABICALLS__");
+  }
+
+  Builder.defineMacro("__REGISTER_PREFIX__", "");
+
+  switch (FloatABI) {
+  case HardFloat:
+    Builder.defineMacro("__mips_hard_float", Twine(1));
+    break;
+  case SoftFloat:
+    Builder.defineMacro("__mips_soft_float", Twine(1));
+    break;
+  }
+
+  if (IsSingleFloat)
+    Builder.defineMacro("__mips_single_float", Twine(1));
+
+  switch (FPMode) {
+  case FPXX:
+    Builder.defineMacro("__mips_fpr", Twine(0));
+    break;
+  case FP32:
+    Builder.defineMacro("__mips_fpr", Twine(32));
+    break;
+  case FP64:
+    Builder.defineMacro("__mips_fpr", Twine(64));
+    break;
+}
+
+  if (FPMode == FP64 || IsSingleFloat)
+    Builder.defineMacro("_MIPS_FPSET", Twine(32));
+  else
+    Builder.defineMacro("_MIPS_FPSET", Twine(16));
+
+  if (IsMips16)
+    Builder.defineMacro("__mips16", Twine(1));
+
+  if (IsMicromips)
+    Builder.defineMacro("__mips_micromips", Twine(1));
+
+  if (IsNan2008)
+    Builder.defineMacro("__mips_nan2008", Twine(1));
+
+  if (IsAbs2008)
+    Builder.defineMacro("__mips_abs2008", Twine(1));
+
+  switch (DspRev) {
+  default:
+    break;
+  case DSP1:
+    Builder.defineMacro("__mips_dsp_rev", Twine(1));
+    Builder.defineMacro("__mips_dsp", Twine(1));
+    break;
+  case DSP2:
+    Builder.defineMacro("__mips_dsp_rev", Twine(2));
+    Builder.defineMacro("__mips_dspr2", Twine(1));
+    Builder.defineMacro("__mips_dsp", Twine(1));
+    break;
+  }
+
+  if (HasMSA)
+    Builder.defineMacro("__mips_msa", Twine(1));
+
+  if (DisableMadd4)
+    Builder.defineMacro("__mips_no_madd4", Twine(1));
+
+  Builder.defineMacro("_MIPS_SZPTR", Twine(getPointerWidth(0)));
+  Builder.defineMacro("_MIPS_SZINT", Twine(getIntWidth()));
+  Builder.defineMacro("_MIPS_SZLONG", Twine(getLongWidth()));
+
+  Builder.defineMacro("_MIPS_ARCH", "\"" + CPU + "\"");
+  if (CPU == "octeon+")
+    Builder.defineMacro("_MIPS_ARCH_OCTEONP");
+  else
+    Builder.defineMacro("_MIPS_ARCH_" + StringRef(CPU).upper());
+
+  if (StringRef(CPU).startswith("octeon"))
+    Builder.defineMacro("__OCTEON__");
+
+  // These shouldn't be defined for MIPS-I but there's no need to check
+  // for that since MIPS-I isn't supported.
+  Builder.defineMacro("__GCC_HAVE_SYNC_COMPARE_AND_SWAP_1");
+  Builder.defineMacro("__GCC_HAVE_SYNC_COMPARE_AND_SWAP_2");
+  Builder.defineMacro("__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4");
+
+  // 32-bit MIPS processors don't have the necessary lld/scd instructions
+  // found in 64-bit processors. In the case of O32 on a 64-bit processor,
+  // the instructions exist but using them violates the ABI since they
+  // require 64-bit GPRs and O32 only supports 32-bit GPRs.
+  if (ABI == "n32" || ABI == "n64")
+    Builder.defineMacro("__GCC_HAVE_SYNC_COMPARE_AND_SWAP_8");
+}
+
+bool MipsTargetInfo::hasFeature(StringRef Feature) const {
+  return llvm::StringSwitch<bool>(Feature)
+      .Case("mips", true)
+      .Case("fp64", FPMode == FP64)
+      .Default(false);
+}
+
+ArrayRef<Builtin::Info> MipsTargetInfo::getTargetBuiltins() const {
+  return llvm::makeArrayRef(BuiltinInfo, clang::Mips::LastTSBuiltin -
+                                             Builtin::FirstTSBuiltin);
+}
+
+unsigned MipsTargetInfo::getUnwindWordWidth() const {
+  return llvm::StringSwitch<unsigned>(ABI)
+      .Case("o32", 32)
+      .Case("n32", 64)
+      .Case("n64", 64)
+      .Default(getPointerWidth(0));
+}
+
+bool MipsTargetInfo::validateTarget(DiagnosticsEngine &Diags) const {
+  // microMIPS64R6 backend was removed.
+  if (getTriple().isMIPS64() && IsMicromips && (ABI == "n32" || ABI == "n64")) {
+    Diags.Report(diag::err_target_unsupported_cpu_for_micromips) << CPU;
+    return false;
+  }
+  // FIXME: It's valid to use O32 on a 64-bit CPU but the backend can't handle
+  //        this yet. It's better to fail here than on the backend assertion.
+  if (processorSupportsGPR64() && ABI == "o32") {
+    Diags.Report(diag::err_target_unsupported_abi) << ABI << CPU;
+    return false;
+  }
+
+  // 64-bit ABI's require 64-bit CPU's.
+  if (!processorSupportsGPR64() && (ABI == "n32" || ABI == "n64")) {
+    Diags.Report(diag::err_target_unsupported_abi) << ABI << CPU;
+    return false;
+  }
+
+  // FIXME: It's valid to use O32 on a mips64/mips64el triple but the backend
+  //        can't handle this yet. It's better to fail here than on the
+  //        backend assertion.
+  if (getTriple().isMIPS64() && ABI == "o32") {
+    Diags.Report(diag::err_target_unsupported_abi_for_triple)
+        << ABI << getTriple().str();
+    return false;
+  }
+
+  // FIXME: It's valid to use N32/N64 on a mips/mipsel triple but the backend
+  //        can't handle this yet. It's better to fail here than on the
+  //        backend assertion.
+  if (getTriple().isMIPS32() && (ABI == "n32" || ABI == "n64")) {
+    Diags.Report(diag::err_target_unsupported_abi_for_triple)
+        << ABI << getTriple().str();
+    return false;
+  }
+
+  // -fpxx is valid only for the o32 ABI
+  if (FPMode == FPXX && (ABI == "n32" || ABI == "n64")) {
+    Diags.Report(diag::err_unsupported_abi_for_opt) << "-mfpxx" << "o32";
+    return false;
+  }
+
+  // -mfp32 and n32/n64 ABIs are incompatible
+  if (FPMode != FP64 && FPMode != FPXX && !IsSingleFloat &&
+      (ABI == "n32" || ABI == "n64")) {
+    Diags.Report(diag::err_opt_not_valid_with_opt) << "-mfpxx" << CPU;
+    return false;
+  }
+  // Mips revision 6 and -mfp32 are incompatible
+  if (FPMode != FP64 && FPMode != FPXX && (CPU == "mips32r6" ||
+      CPU == "mips64r6")) {
+    Diags.Report(diag::err_opt_not_valid_with_opt) << "-mfp32" << CPU;
+    return false;
+  }
+  // Option -mfp64 permitted on Mips32 iff revision 2 or higher is present
+  if (FPMode == FP64 && (CPU == "mips1" || CPU == "mips2" ||
+      getISARev() < 2) && ABI == "o32") {
+    Diags.Report(diag::err_mips_fp64_req) << "-mfp64";
+    return false;
+  }
+
+  return true;
+}