| //===--- 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) |
| .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"}, {"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", 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 + "\""); |
| Builder.defineMacro("_MIPS_ARCH_" + StringRef(CPU).upper()); |
| |
| // 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; |
| } |