1//===--- SystemZ.cpp - SystemZ 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 "SystemZ.h"
10#include "clang/Config/config.h"
11#include "clang/Driver/Options.h"
12#include "llvm/Option/ArgList.h"
13#include "llvm/TargetParser/Host.h"
14
15using namespace clang::driver;
16using namespace clang::driver::tools;
17using namespace clang;
18using namespace llvm::opt;
19
20systemz::FloatABI systemz::getSystemZFloatABI(const Driver &D,
21 const ArgList &Args) {
22 // Hard float is the default.
23 systemz::FloatABI ABI = systemz::FloatABI::Hard;
24 if (Args.hasArg(Ids: options::OPT_mfloat_abi_EQ))
25 D.Diag(DiagID: diag::err_drv_unsupported_opt)
26 << Args.getLastArg(Ids: options::OPT_mfloat_abi_EQ)->getAsString(Args);
27
28 if (Arg *A = Args.getLastArg(Ids: clang::driver::options::OPT_msoft_float,
29 Ids: options::OPT_mhard_float))
30 if (A->getOption().matches(ID: clang::driver::options::OPT_msoft_float))
31 ABI = systemz::FloatABI::Soft;
32
33 return ABI;
34}
35
36std::string systemz::getSystemZTargetCPU(const ArgList &Args,
37 const llvm::Triple &T) {
38 if (const Arg *A = Args.getLastArg(Ids: clang::driver::options::OPT_march_EQ)) {
39 llvm::StringRef CPUName = A->getValue();
40
41 if (CPUName == "native") {
42 std::string CPU = std::string(llvm::sys::getHostCPUName());
43 if (!CPU.empty() && CPU != "generic")
44 return CPU;
45 else
46 return "";
47 }
48
49 return std::string(CPUName);
50 }
51 if (T.isOSzOS())
52 return "zEC12";
53 return CLANG_SYSTEMZ_DEFAULT_ARCH;
54}
55
56void systemz::getSystemZTargetFeatures(const Driver &D, const ArgList &Args,
57 std::vector<llvm::StringRef> &Features) {
58 // -m(no-)htm overrides use of the transactional-execution facility.
59 if (Arg *A = Args.getLastArg(Ids: options::OPT_mhtm, Ids: options::OPT_mno_htm)) {
60 if (A->getOption().matches(ID: options::OPT_mhtm))
61 Features.push_back(x: "+transactional-execution");
62 else
63 Features.push_back(x: "-transactional-execution");
64 }
65 // -m(no-)vx overrides use of the vector facility.
66 if (Arg *A = Args.getLastArg(Ids: options::OPT_mvx, Ids: options::OPT_mno_vx)) {
67 if (A->getOption().matches(ID: options::OPT_mvx))
68 Features.push_back(x: "+vector");
69 else
70 Features.push_back(x: "-vector");
71 }
72
73 systemz::FloatABI FloatABI = systemz::getSystemZFloatABI(D, Args);
74 if (FloatABI == systemz::FloatABI::Soft)
75 Features.push_back(x: "+soft-float");
76
77 if (const Arg *A = Args.getLastArg(Ids: options::OPT_munaligned_symbols,
78 Ids: options::OPT_mno_unaligned_symbols)) {
79 if (A->getOption().matches(ID: options::OPT_munaligned_symbols))
80 Features.push_back(x: "+unaligned-symbols");
81 else
82 Features.push_back(x: "-unaligned-symbols");
83 }
84}
85