xref: /freebsd/contrib/llvm-project/clang/lib/Driver/ToolChains/Arch/PPC.cpp (revision e6bfd18d21b225af6a0ed67ceeaf1293b7b9eba5)
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