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
18using namespace clang::driver;
19using namespace clang::driver::tools;
20using namespace clang;
21using namespace llvm::opt;
22
23/// getPPCTargetCPU - Get the (LLVM) name of the PowerPC cpu we are targeting.
24std::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 = 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("a2q", "a2q")
61        .Case("e500", "e500")
62        .Case("e500mc", "e500mc")
63        .Case("e5500", "e5500")
64        .Case("power3", "pwr3")
65        .Case("power4", "pwr4")
66        .Case("power5", "pwr5")
67        .Case("power5x", "pwr5x")
68        .Case("power6", "pwr6")
69        .Case("power6x", "pwr6x")
70        .Case("power7", "pwr7")
71        .Case("power8", "pwr8")
72        .Case("power9", "pwr9")
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("powerpc", "ppc")
84        .Case("powerpc64", "ppc64")
85        .Case("powerpc64le", "ppc64le")
86        .Default("");
87  }
88
89  return "";
90}
91
92const char *ppc::getPPCAsmModeForCPU(StringRef Name) {
93  return llvm::StringSwitch<const char *>(Name)
94        .Case("pwr7", "-mpower7")
95        .Case("power7", "-mpower7")
96        .Case("pwr8", "-mpower8")
97        .Case("power8", "-mpower8")
98        .Case("ppc64le", "-mpower8")
99        .Case("pwr9", "-mpower9")
100        .Case("power9", "-mpower9")
101        .Default("-many");
102}
103
104void ppc::getPPCTargetFeatures(const Driver &D, const llvm::Triple &Triple,
105                               const ArgList &Args,
106                               std::vector<StringRef> &Features) {
107  if (Triple.getSubArch() == llvm::Triple::PPCSubArch_spe)
108    Features.push_back("+spe");
109
110  handleTargetFeaturesGroup(Args, Features, options::OPT_m_ppc_Features_Group);
111
112  ppc::FloatABI FloatABI = ppc::getPPCFloatABI(D, Args);
113  if (FloatABI == ppc::FloatABI::Soft)
114    Features.push_back("-hard-float");
115
116  ppc::ReadGOTPtrMode ReadGOT = ppc::getPPCReadGOTPtrMode(D, Triple, Args);
117  if (ReadGOT == ppc::ReadGOTPtrMode::SecurePlt)
118    Features.push_back("+secure-plt");
119}
120
121ppc::ReadGOTPtrMode ppc::getPPCReadGOTPtrMode(const Driver &D, const llvm::Triple &Triple,
122                                              const ArgList &Args) {
123  if (Args.getLastArg(options::OPT_msecure_plt))
124    return ppc::ReadGOTPtrMode::SecurePlt;
125  if ((Triple.isOSFreeBSD() && Triple.getOSMajorVersion() >= 13) ||
126      Triple.isOSNetBSD() || Triple.isOSOpenBSD() || Triple.isMusl())
127    return ppc::ReadGOTPtrMode::SecurePlt;
128  else
129    return ppc::ReadGOTPtrMode::Bss;
130}
131
132ppc::FloatABI ppc::getPPCFloatABI(const Driver &D, const ArgList &Args) {
133  ppc::FloatABI ABI = ppc::FloatABI::Invalid;
134  if (Arg *A =
135          Args.getLastArg(options::OPT_msoft_float, options::OPT_mhard_float,
136                          options::OPT_mfloat_abi_EQ)) {
137    if (A->getOption().matches(options::OPT_msoft_float))
138      ABI = ppc::FloatABI::Soft;
139    else if (A->getOption().matches(options::OPT_mhard_float))
140      ABI = ppc::FloatABI::Hard;
141    else {
142      ABI = llvm::StringSwitch<ppc::FloatABI>(A->getValue())
143                .Case("soft", ppc::FloatABI::Soft)
144                .Case("hard", ppc::FloatABI::Hard)
145                .Default(ppc::FloatABI::Invalid);
146      if (ABI == ppc::FloatABI::Invalid && !StringRef(A->getValue()).empty()) {
147        D.Diag(clang::diag::err_drv_invalid_mfloat_abi) << A->getAsString(Args);
148        ABI = ppc::FloatABI::Hard;
149      }
150    }
151  }
152
153  // If unspecified, choose the default based on the platform.
154  if (ABI == ppc::FloatABI::Invalid) {
155    ABI = ppc::FloatABI::Hard;
156  }
157
158  return ABI;
159}
160
161bool ppc::hasPPCAbiArg(const ArgList &Args, const char *Value) {
162  Arg *A = Args.getLastArg(options::OPT_mabi_EQ);
163  return A && (A->getValue() == StringRef(Value));
164}
165