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 "clang/Driver/CommonArgs.h"
11#include "clang/Driver/Driver.h"
12#include "clang/Driver/Options.h"
13#include "llvm/ADT/StringSwitch.h"
14#include "llvm/Option/ArgList.h"
15#include "llvm/TargetParser/Host.h"
16
17using namespace clang::driver;
18using namespace clang::driver::tools;
19using namespace clang;
20using namespace llvm::opt;
21
22const char *ppc::getPPCAsmModeForCPU(StringRef Name) {
23 return llvm::StringSwitch<const char *>(Name)
24 .Case(S: "pwr7", Value: "-mpower7")
25 .Case(S: "power7", Value: "-mpower7")
26 .Case(S: "pwr8", Value: "-mpower8")
27 .Case(S: "power8", Value: "-mpower8")
28 .Case(S: "ppc64le", Value: "-mpower8")
29 .Case(S: "pwr9", Value: "-mpower9")
30 .Case(S: "power9", Value: "-mpower9")
31 .Case(S: "pwr10", Value: "-mpower10")
32 .Case(S: "power10", Value: "-mpower10")
33 .Case(S: "pwr11", Value: "-mpower11")
34 .Case(S: "power11", Value: "-mpower11")
35 .Default(Value: "-many");
36}
37
38void ppc::getPPCTargetFeatures(const Driver &D, const llvm::Triple &Triple,
39 const ArgList &Args,
40 std::vector<StringRef> &Features) {
41 if (Triple.getSubArch() == llvm::Triple::PPCSubArch_spe)
42 Features.push_back(x: "+spe");
43
44 handleTargetFeaturesGroup(D, Triple, Args, Features,
45 Group: options::OPT_m_ppc_Features_Group);
46
47 ppc::FloatABI FloatABI = ppc::getPPCFloatABI(D, Args);
48 if (FloatABI == ppc::FloatABI::Soft)
49 Features.push_back(x: "-hard-float");
50
51 ppc::ReadGOTPtrMode ReadGOT = ppc::getPPCReadGOTPtrMode(D, Triple, Args);
52 if (ReadGOT == ppc::ReadGOTPtrMode::SecurePlt)
53 Features.push_back(x: "+secure-plt");
54
55 bool UseSeparateSections = isUseSeparateSections(Triple);
56 bool HasDefaultDataSections = Triple.isOSBinFormatXCOFF();
57 if (Args.hasArg(Ids: options::OPT_maix_small_local_exec_tls) ||
58 Args.hasArg(Ids: options::OPT_maix_small_local_dynamic_tls)) {
59 if (!Triple.isOSAIX() || !Triple.isArch64Bit())
60 D.Diag(DiagID: diag::err_opt_not_valid_on_target)
61 << "-maix-small-local-[exec|dynamic]-tls";
62
63 // The -maix-small-local-[exec|dynamic]-tls option should only be used with
64 // -fdata-sections, as having data sections turned off with this option
65 // is not ideal for performance. Moreover, the
66 // small-local-[exec|dynamic]-tls region is a limited resource, and should
67 // not be used for variables that may be replaced.
68 if (!Args.hasFlag(Pos: options::OPT_fdata_sections,
69 Neg: options::OPT_fno_data_sections,
70 Default: UseSeparateSections || HasDefaultDataSections))
71 D.Diag(DiagID: diag::err_drv_argument_only_allowed_with)
72 << "-maix-small-local-[exec|dynamic]-tls" << "-fdata-sections";
73 }
74
75 if (Args.hasArg(Ids: options::OPT_maix_shared_lib_tls_model_opt) &&
76 !(Triple.isOSAIX() && Triple.isArch64Bit()))
77 D.Diag(DiagID: diag::err_opt_not_valid_on_target)
78 << "-maix-shared-lib-tls-model-opt";
79}
80
81ppc::ReadGOTPtrMode ppc::getPPCReadGOTPtrMode(const Driver &D, const llvm::Triple &Triple,
82 const ArgList &Args) {
83 if (Args.getLastArg(Ids: options::OPT_msecure_plt))
84 return ppc::ReadGOTPtrMode::SecurePlt;
85 if (Triple.isPPC32SecurePlt())
86 return ppc::ReadGOTPtrMode::SecurePlt;
87 else
88 return ppc::ReadGOTPtrMode::Bss;
89}
90
91ppc::FloatABI ppc::getPPCFloatABI(const Driver &D, const ArgList &Args) {
92 ppc::FloatABI ABI = ppc::FloatABI::Invalid;
93 if (Arg *A =
94 Args.getLastArg(Ids: options::OPT_msoft_float, Ids: options::OPT_mhard_float,
95 Ids: options::OPT_mfloat_abi_EQ)) {
96 if (A->getOption().matches(ID: options::OPT_msoft_float))
97 ABI = ppc::FloatABI::Soft;
98 else if (A->getOption().matches(ID: options::OPT_mhard_float))
99 ABI = ppc::FloatABI::Hard;
100 else {
101 ABI = llvm::StringSwitch<ppc::FloatABI>(A->getValue())
102 .Case(S: "soft", Value: ppc::FloatABI::Soft)
103 .Case(S: "hard", Value: ppc::FloatABI::Hard)
104 .Default(Value: ppc::FloatABI::Invalid);
105 if (ABI == ppc::FloatABI::Invalid && !StringRef(A->getValue()).empty()) {
106 D.Diag(DiagID: clang::diag::err_drv_invalid_mfloat_abi) << A->getAsString(Args);
107 ABI = ppc::FloatABI::Hard;
108 }
109 }
110 }
111
112 // If unspecified, choose the default based on the platform.
113 if (ABI == ppc::FloatABI::Invalid) {
114 ABI = ppc::FloatABI::Hard;
115 }
116
117 return ABI;
118}
119
120bool ppc::hasPPCAbiArg(const ArgList &Args, const char *Value) {
121 Arg *A = Args.getLastArg(Ids: options::OPT_mabi_EQ);
122 return A && (A->getValue() == StringRef(Value));
123}
124