| //===--- PPC.cpp - PPC Helpers for Tools ------------------------*- 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "PPC.h" |
| #include "ToolChains/CommonArgs.h" |
| #include "clang/Driver/Driver.h" |
| #include "clang/Driver/DriverDiagnostic.h" |
| #include "clang/Driver/Options.h" |
| #include "llvm/ADT/StringSwitch.h" |
| #include "llvm/Option/ArgList.h" |
| #include "llvm/TargetParser/Host.h" |
| |
| using namespace clang::driver; |
| using namespace clang::driver::tools; |
| using namespace clang; |
| using namespace llvm::opt; |
| |
| static std::string getPPCGenericTargetCPU(const llvm::Triple &T) { |
| // LLVM may default to generating code for the native CPU, |
| // but, like gcc, we default to a more generic option for |
| // each architecture. (except on AIX) |
| if (T.isOSAIX()) |
| return "pwr7"; |
| else if (T.getArch() == llvm::Triple::ppc64le) |
| return "ppc64le"; |
| else if (T.getArch() == llvm::Triple::ppc64) |
| return "ppc64"; |
| else |
| return "ppc"; |
| } |
| |
| static std::string normalizeCPUName(StringRef CPUName, const llvm::Triple &T) { |
| // Clang/LLVM does not actually support code generation |
| // for the 405 CPU. However, there are uses of this CPU ID |
| // in projects that previously used GCC and rely on Clang |
| // accepting it. Clang has always ignored it and passed the |
| // generic CPU ID to the back end. |
| if (CPUName == "generic" || CPUName == "405") |
| return getPPCGenericTargetCPU(T); |
| |
| if (CPUName == "native") { |
| std::string CPU = std::string(llvm::sys::getHostCPUName()); |
| if (!CPU.empty() && CPU != "generic") |
| return CPU; |
| else |
| return getPPCGenericTargetCPU(T); |
| } |
| |
| return llvm::StringSwitch<const char *>(CPUName) |
| .Case("common", "generic") |
| .Case("440fp", "440") |
| .Case("630", "pwr3") |
| .Case("G3", "g3") |
| .Case("G4", "g4") |
| .Case("G4+", "g4+") |
| .Case("8548", "e500") |
| .Case("G5", "g5") |
| .Case("power3", "pwr3") |
| .Case("power4", "pwr4") |
| .Case("power5", "pwr5") |
| .Case("power5x", "pwr5x") |
| .Case("power6", "pwr6") |
| .Case("power6x", "pwr6x") |
| .Case("power7", "pwr7") |
| .Case("power8", "pwr8") |
| .Case("power9", "pwr9") |
| .Case("power10", "pwr10") |
| .Case("future", "future") |
| .Case("powerpc", "ppc") |
| .Case("powerpc64", "ppc64") |
| .Case("powerpc64le", "ppc64le") |
| .Default(CPUName.data()); |
| } |
| |
| /// Get the (LLVM) name of the PowerPC cpu we are tuning for. |
| std::string ppc::getPPCTuneCPU(const ArgList &Args, const llvm::Triple &T) { |
| if (Arg *A = Args.getLastArg(clang::driver::options::OPT_mtune_EQ)) |
| return normalizeCPUName(A->getValue(), T); |
| return getPPCGenericTargetCPU(T); |
| } |
| |
| /// Get the (LLVM) name of the PowerPC cpu we are targeting. |
| std::string ppc::getPPCTargetCPU(const Driver &D, const ArgList &Args, |
| const llvm::Triple &T) { |
| if (Arg *A = Args.getLastArg(clang::driver::options::OPT_mcpu_EQ)) |
| return normalizeCPUName(A->getValue(), T); |
| return getPPCGenericTargetCPU(T); |
| } |
| |
| const char *ppc::getPPCAsmModeForCPU(StringRef Name) { |
| return llvm::StringSwitch<const char *>(Name) |
| .Case("pwr7", "-mpower7") |
| .Case("power7", "-mpower7") |
| .Case("pwr8", "-mpower8") |
| .Case("power8", "-mpower8") |
| .Case("ppc64le", "-mpower8") |
| .Case("pwr9", "-mpower9") |
| .Case("power9", "-mpower9") |
| .Case("pwr10", "-mpower10") |
| .Case("power10", "-mpower10") |
| .Default("-many"); |
| } |
| |
| void ppc::getPPCTargetFeatures(const Driver &D, const llvm::Triple &Triple, |
| const ArgList &Args, |
| std::vector<StringRef> &Features) { |
| if (Triple.getSubArch() == llvm::Triple::PPCSubArch_spe) |
| Features.push_back("+spe"); |
| |
| handleTargetFeaturesGroup(D, Triple, Args, Features, |
| options::OPT_m_ppc_Features_Group); |
| |
| ppc::FloatABI FloatABI = ppc::getPPCFloatABI(D, Args); |
| if (FloatABI == ppc::FloatABI::Soft) |
| Features.push_back("-hard-float"); |
| |
| ppc::ReadGOTPtrMode ReadGOT = ppc::getPPCReadGOTPtrMode(D, Triple, Args); |
| if (ReadGOT == ppc::ReadGOTPtrMode::SecurePlt) |
| Features.push_back("+secure-plt"); |
| } |
| |
| ppc::ReadGOTPtrMode ppc::getPPCReadGOTPtrMode(const Driver &D, const llvm::Triple &Triple, |
| const ArgList &Args) { |
| if (Args.getLastArg(options::OPT_msecure_plt)) |
| return ppc::ReadGOTPtrMode::SecurePlt; |
| if (Triple.isPPC32SecurePlt()) |
| return ppc::ReadGOTPtrMode::SecurePlt; |
| else |
| return ppc::ReadGOTPtrMode::Bss; |
| } |
| |
| ppc::FloatABI ppc::getPPCFloatABI(const Driver &D, const ArgList &Args) { |
| ppc::FloatABI ABI = ppc::FloatABI::Invalid; |
| if (Arg *A = |
| Args.getLastArg(options::OPT_msoft_float, options::OPT_mhard_float, |
| options::OPT_mfloat_abi_EQ)) { |
| if (A->getOption().matches(options::OPT_msoft_float)) |
| ABI = ppc::FloatABI::Soft; |
| else if (A->getOption().matches(options::OPT_mhard_float)) |
| ABI = ppc::FloatABI::Hard; |
| else { |
| ABI = llvm::StringSwitch<ppc::FloatABI>(A->getValue()) |
| .Case("soft", ppc::FloatABI::Soft) |
| .Case("hard", ppc::FloatABI::Hard) |
| .Default(ppc::FloatABI::Invalid); |
| if (ABI == ppc::FloatABI::Invalid && !StringRef(A->getValue()).empty()) { |
| D.Diag(clang::diag::err_drv_invalid_mfloat_abi) << A->getAsString(Args); |
| ABI = ppc::FloatABI::Hard; |
| } |
| } |
| } |
| |
| // If unspecified, choose the default based on the platform. |
| if (ABI == ppc::FloatABI::Invalid) { |
| ABI = ppc::FloatABI::Hard; |
| } |
| |
| return ABI; |
| } |
| |
| bool ppc::hasPPCAbiArg(const ArgList &Args, const char *Value) { |
| Arg *A = Args.getLastArg(options::OPT_mabi_EQ); |
| return A && (A->getValue() == StringRef(Value)); |
| } |