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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
17 using namespace clang::driver;
18 using namespace clang::driver::tools;
19 using namespace clang;
20 using namespace llvm::opt;
21
22 /// getPPCTargetCPU - Get the (LLVM) name of the PowerPC cpu we are targeting.
23 std::string ppc::getPPCTargetCPU(const ArgList &Args) {
24   if (Arg *A = Args.getLastArg(clang::driver::options::OPT_mcpu_EQ)) {
25     StringRef CPUName = A->getValue();
26
27     if (CPUName == "native") {
28       std::string CPU = llvm::sys::getHostCPUName();
29       if (!CPU.empty() && CPU != "generic")
30         return CPU;
31       else
32         return "";
33     }
34
35     return llvm::StringSwitch<const char *>(CPUName)
36         .Case("common", "generic")
37         .Case("440", "440")
38         .Case("440fp", "440")
39         .Case("450", "450")
40         .Case("601", "601")
41         .Case("602", "602")
42         .Case("603", "603")
43         .Case("603e", "603e")
44         .Case("603ev", "603ev")
45         .Case("604", "604")
46         .Case("604e", "604e")
47         .Case("620", "620")
48         .Case("630", "pwr3")
49         .Case("G3", "g3")
50         .Case("7400", "7400")
51         .Case("G4", "g4")
52         .Case("7450", "7450")
53         .Case("G4+", "g4+")
54         .Case("750", "750")
55         .Case("970", "970")
56         .Case("G5", "g5")
57         .Case("a2", "a2")
58         .Case("a2q", "a2q")
59         .Case("e500mc", "e500mc")
60         .Case("e5500", "e5500")
61         .Case("power3", "pwr3")
62         .Case("power4", "pwr4")
63         .Case("power5", "pwr5")
64         .Case("power5x", "pwr5x")
65         .Case("power6", "pwr6")
66         .Case("power6x", "pwr6x")
67         .Case("power7", "pwr7")
68         .Case("power8", "pwr8")
69         .Case("power9", "pwr9")
70         .Case("pwr3", "pwr3")
71         .Case("pwr4", "pwr4")
72         .Case("pwr5", "pwr5")
73         .Case("pwr5x", "pwr5x")
74         .Case("pwr6", "pwr6")
75         .Case("pwr6x", "pwr6x")
76         .Case("pwr7", "pwr7")
77         .Case("pwr8", "pwr8")
78         .Case("pwr9", "pwr9")
79         .Case("powerpc", "ppc")
80         .Case("powerpc64", "ppc64")
81         .Case("powerpc64le", "ppc64le")
82         .Default("");
83   }
84
85   return "";
86 }
87
88 const char *ppc::getPPCAsmModeForCPU(StringRef Name) {
89   return llvm::StringSwitch<const char *>(Name)
90         .Case("pwr7", "-mpower7")
91         .Case("power7", "-mpower7")
92         .Case("pwr8", "-mpower8")
93         .Case("power8", "-mpower8")
94         .Case("ppc64le", "-mpower8")
95         .Case("pwr9", "-mpower9")
96         .Case("power9", "-mpower9")
97         .Default("-many");
98 }
99
100 void ppc::getPPCTargetFeatures(const Driver &D, const llvm::Triple &Triple,
101                                const ArgList &Args,
102                                std::vector<StringRef> &Features) {
103   handleTargetFeaturesGroup(Args, Features, options::OPT_m_ppc_Features_Group);
104
105   ppc::FloatABI FloatABI = ppc::getPPCFloatABI(D, Args);
106   if (FloatABI == ppc::FloatABI::Soft)
107     Features.push_back("-hard-float");
108
109   ppc::ReadGOTPtrMode ReadGOT = ppc::getPPCReadGOTPtrMode(D, Triple, Args);
110   if (ReadGOT == ppc::ReadGOTPtrMode::SecurePlt)
111     Features.push_back("+secure-plt");
112 }
113
114 ppc::ReadGOTPtrMode ppc::getPPCReadGOTPtrMode(const Driver &D, const llvm::Triple &Triple,
115                                               const ArgList &Args) {
116   if (Args.getLastArg(options::OPT_msecure_plt))
117     return ppc::ReadGOTPtrMode::SecurePlt;
118   if ((Triple.isOSFreeBSD() && Triple.getOSMajorVersion() >= 13) ||
119       Triple.isOSNetBSD() || Triple.isOSOpenBSD() || Triple.isMusl())
120     return ppc::ReadGOTPtrMode::SecurePlt;
121   else
122     return ppc::ReadGOTPtrMode::Bss;
123 }
124
125 ppc::FloatABI ppc::getPPCFloatABI(const Driver &D, const ArgList &Args) {
126   ppc::FloatABI ABI = ppc::FloatABI::Invalid;
127   if (Arg *A =
128           Args.getLastArg(options::OPT_msoft_float, options::OPT_mhard_float,
129                           options::OPT_mfloat_abi_EQ)) {
130     if (A->getOption().matches(options::OPT_msoft_float))
131       ABI = ppc::FloatABI::Soft;
132     else if (A->getOption().matches(options::OPT_mhard_float))
133       ABI = ppc::FloatABI::Hard;
134     else {
135       ABI = llvm::StringSwitch<ppc::FloatABI>(A->getValue())
136                 .Case("soft", ppc::FloatABI::Soft)
137                 .Case("hard", ppc::FloatABI::Hard)
138                 .Default(ppc::FloatABI::Invalid);
139       if (ABI == ppc::FloatABI::Invalid && !StringRef(A->getValue()).empty()) {
140         D.Diag(clang::diag::err_drv_invalid_mfloat_abi) << A->getAsString(Args);
141         ABI = ppc::FloatABI::Hard;
142       }
143     }
144   }
145
146   // If unspecified, choose the default based on the platform.
147   if (ABI == ppc::FloatABI::Invalid) {
148     ABI = ppc::FloatABI::Hard;
149   }
150
151   return ABI;
152 }
153
154 bool ppc::hasPPCAbiArg(const ArgList &Args, const char *Value) {
155   Arg *A = Args.getLastArg(options::OPT_mabi_EQ);
156   return A && (A->getValue() == StringRef(Value));
157 }