1 //===--- PPC.cpp - PPC Helpers for Tools ------------------------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "PPC.h" 10 #include "ToolChains/CommonArgs.h" 11 #include "clang/Driver/Driver.h" 12 #include "clang/Driver/DriverDiagnostic.h" 13 #include "clang/Driver/Options.h" 14 #include "llvm/ADT/StringSwitch.h" 15 #include "llvm/Option/ArgList.h" 16 #include "llvm/Support/Host.h" 17 18 using namespace clang::driver; 19 using namespace clang::driver::tools; 20 using namespace clang; 21 using namespace llvm::opt; 22 23 /// getPPCTargetCPU - Get the (LLVM) name of the PowerPC cpu we are targeting. 24 std::string ppc::getPPCTargetCPU(const ArgList &Args) { 25 if (Arg *A = Args.getLastArg(clang::driver::options::OPT_mcpu_EQ)) { 26 StringRef CPUName = A->getValue(); 27 28 if (CPUName == "native") { 29 std::string CPU = std::string(llvm::sys::getHostCPUName()); 30 if (!CPU.empty() && CPU != "generic") 31 return CPU; 32 else 33 return ""; 34 } 35 36 return llvm::StringSwitch<const char *>(CPUName) 37 .Case("common", "generic") 38 .Case("440", "440") 39 .Case("440fp", "440") 40 .Case("450", "450") 41 .Case("601", "601") 42 .Case("602", "602") 43 .Case("603", "603") 44 .Case("603e", "603e") 45 .Case("603ev", "603ev") 46 .Case("604", "604") 47 .Case("604e", "604e") 48 .Case("620", "620") 49 .Case("630", "pwr3") 50 .Case("G3", "g3") 51 .Case("7400", "7400") 52 .Case("G4", "g4") 53 .Case("7450", "7450") 54 .Case("G4+", "g4+") 55 .Case("750", "750") 56 .Case("8548", "e500") 57 .Case("970", "970") 58 .Case("G5", "g5") 59 .Case("a2", "a2") 60 .Case("e500", "e500") 61 .Case("e500mc", "e500mc") 62 .Case("e5500", "e5500") 63 .Case("power3", "pwr3") 64 .Case("power4", "pwr4") 65 .Case("power5", "pwr5") 66 .Case("power5x", "pwr5x") 67 .Case("power6", "pwr6") 68 .Case("power6x", "pwr6x") 69 .Case("power7", "pwr7") 70 .Case("power8", "pwr8") 71 .Case("power9", "pwr9") 72 .Case("power10", "pwr10") 73 .Case("future", "future") 74 .Case("pwr3", "pwr3") 75 .Case("pwr4", "pwr4") 76 .Case("pwr5", "pwr5") 77 .Case("pwr5x", "pwr5x") 78 .Case("pwr6", "pwr6") 79 .Case("pwr6x", "pwr6x") 80 .Case("pwr7", "pwr7") 81 .Case("pwr8", "pwr8") 82 .Case("pwr9", "pwr9") 83 .Case("pwr10", "pwr10") 84 .Case("powerpc", "ppc") 85 .Case("powerpc64", "ppc64") 86 .Case("powerpc64le", "ppc64le") 87 .Default(""); 88 } 89 90 return ""; 91 } 92 93 const char *ppc::getPPCAsmModeForCPU(StringRef Name) { 94 return llvm::StringSwitch<const char *>(Name) 95 .Case("pwr7", "-mpower7") 96 .Case("power7", "-mpower7") 97 .Case("pwr8", "-mpower8") 98 .Case("power8", "-mpower8") 99 .Case("ppc64le", "-mpower8") 100 .Case("pwr9", "-mpower9") 101 .Case("power9", "-mpower9") 102 .Case("pwr10", "-mpower10") 103 .Case("power10", "-mpower10") 104 .Default("-many"); 105 } 106 107 void ppc::getPPCTargetFeatures(const Driver &D, const llvm::Triple &Triple, 108 const ArgList &Args, 109 std::vector<StringRef> &Features) { 110 // TODO Handle -mtune=. Suppress -Wunused-command-line-argument as a 111 // longstanding behavior. 112 (void)Args.getLastArg(options::OPT_mtune_EQ); 113 114 if (Triple.getSubArch() == llvm::Triple::PPCSubArch_spe) 115 Features.push_back("+spe"); 116 117 handleTargetFeaturesGroup(Args, Features, options::OPT_m_ppc_Features_Group); 118 119 ppc::FloatABI FloatABI = ppc::getPPCFloatABI(D, Args); 120 if (FloatABI == ppc::FloatABI::Soft) 121 Features.push_back("-hard-float"); 122 123 ppc::ReadGOTPtrMode ReadGOT = ppc::getPPCReadGOTPtrMode(D, Triple, Args); 124 if (ReadGOT == ppc::ReadGOTPtrMode::SecurePlt) 125 Features.push_back("+secure-plt"); 126 } 127 128 ppc::ReadGOTPtrMode ppc::getPPCReadGOTPtrMode(const Driver &D, const llvm::Triple &Triple, 129 const ArgList &Args) { 130 if (Args.getLastArg(options::OPT_msecure_plt)) 131 return ppc::ReadGOTPtrMode::SecurePlt; 132 if ((Triple.isOSFreeBSD() && Triple.getOSMajorVersion() >= 13) || 133 Triple.isOSNetBSD() || Triple.isOSOpenBSD() || Triple.isMusl()) 134 return ppc::ReadGOTPtrMode::SecurePlt; 135 else 136 return ppc::ReadGOTPtrMode::Bss; 137 } 138 139 ppc::FloatABI ppc::getPPCFloatABI(const Driver &D, const ArgList &Args) { 140 ppc::FloatABI ABI = ppc::FloatABI::Invalid; 141 if (Arg *A = 142 Args.getLastArg(options::OPT_msoft_float, options::OPT_mhard_float, 143 options::OPT_mfloat_abi_EQ)) { 144 if (A->getOption().matches(options::OPT_msoft_float)) 145 ABI = ppc::FloatABI::Soft; 146 else if (A->getOption().matches(options::OPT_mhard_float)) 147 ABI = ppc::FloatABI::Hard; 148 else { 149 ABI = llvm::StringSwitch<ppc::FloatABI>(A->getValue()) 150 .Case("soft", ppc::FloatABI::Soft) 151 .Case("hard", ppc::FloatABI::Hard) 152 .Default(ppc::FloatABI::Invalid); 153 if (ABI == ppc::FloatABI::Invalid && !StringRef(A->getValue()).empty()) { 154 D.Diag(clang::diag::err_drv_invalid_mfloat_abi) << A->getAsString(Args); 155 ABI = ppc::FloatABI::Hard; 156 } 157 } 158 } 159 160 // If unspecified, choose the default based on the platform. 161 if (ABI == ppc::FloatABI::Invalid) { 162 ABI = ppc::FloatABI::Hard; 163 } 164 165 return ABI; 166 } 167 168 bool ppc::hasPPCAbiArg(const ArgList &Args, const char *Value) { 169 Arg *A = Args.getLastArg(options::OPT_mabi_EQ); 170 return A && (A->getValue() == StringRef(Value)); 171 } 172