1 //===--- M68k.cpp - M68k 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 "M68k.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/SmallVector.h"
15 #include "llvm/ADT/StringSwitch.h"
16 #include "llvm/Option/ArgList.h"
17 #include "llvm/Support/Host.h"
18 #include "llvm/Support/Regex.h"
19 #include <sstream>
20
21 using namespace clang::driver;
22 using namespace clang::driver::tools;
23 using namespace clang;
24 using namespace llvm::opt;
25
26 /// getM68kTargetCPU - Get the (LLVM) name of the 68000 cpu we are targeting.
getM68kTargetCPU(const ArgList & Args)27 std::string m68k::getM68kTargetCPU(const ArgList &Args) {
28 if (Arg *A = Args.getLastArg(clang::driver::options::OPT_mcpu_EQ)) {
29 // The canonical CPU name is captalize. However, we allow
30 // starting with lower case or numbers only
31 StringRef CPUName = A->getValue();
32
33 if (CPUName == "native") {
34 std::string CPU = std::string(llvm::sys::getHostCPUName());
35 if (!CPU.empty() && CPU != "generic")
36 return CPU;
37 }
38
39 if (CPUName == "common")
40 return "generic";
41
42 return llvm::StringSwitch<std::string>(CPUName)
43 .Cases("m68000", "68000", "M68000")
44 .Cases("m68010", "68010", "M68010")
45 .Cases("m68020", "68020", "M68020")
46 .Cases("m68030", "68030", "M68030")
47 .Cases("m68040", "68040", "M68040")
48 .Cases("m68060", "68060", "M68060")
49 .Default(CPUName.str());
50 }
51 // FIXME: Throw error when multiple sub-architecture flag exist
52 if (Args.hasArg(clang::driver::options::OPT_m68000))
53 return "M68000";
54 if (Args.hasArg(clang::driver::options::OPT_m68010))
55 return "M68010";
56 if (Args.hasArg(clang::driver::options::OPT_m68020))
57 return "M68020";
58 if (Args.hasArg(clang::driver::options::OPT_m68030))
59 return "M68030";
60 if (Args.hasArg(clang::driver::options::OPT_m68040))
61 return "M68040";
62 if (Args.hasArg(clang::driver::options::OPT_m68060))
63 return "M68060";
64
65 return "";
66 }
67
getM68kTargetFeatures(const Driver & D,const llvm::Triple & Triple,const ArgList & Args,std::vector<StringRef> & Features)68 void m68k::getM68kTargetFeatures(const Driver &D, const llvm::Triple &Triple,
69 const ArgList &Args,
70 std::vector<StringRef> &Features) {
71
72 m68k::FloatABI FloatABI = m68k::getM68kFloatABI(D, Args);
73 if (FloatABI == m68k::FloatABI::Soft)
74 Features.push_back("-hard-float");
75
76 // Handle '-ffixed-<register>' flags
77 if (Args.hasArg(options::OPT_ffixed_a0))
78 Features.push_back("+reserve-a0");
79 if (Args.hasArg(options::OPT_ffixed_a1))
80 Features.push_back("+reserve-a1");
81 if (Args.hasArg(options::OPT_ffixed_a2))
82 Features.push_back("+reserve-a2");
83 if (Args.hasArg(options::OPT_ffixed_a3))
84 Features.push_back("+reserve-a3");
85 if (Args.hasArg(options::OPT_ffixed_a4))
86 Features.push_back("+reserve-a4");
87 if (Args.hasArg(options::OPT_ffixed_a5))
88 Features.push_back("+reserve-a5");
89 if (Args.hasArg(options::OPT_ffixed_a6))
90 Features.push_back("+reserve-a6");
91 if (Args.hasArg(options::OPT_ffixed_d0))
92 Features.push_back("+reserve-d0");
93 if (Args.hasArg(options::OPT_ffixed_d1))
94 Features.push_back("+reserve-d1");
95 if (Args.hasArg(options::OPT_ffixed_d2))
96 Features.push_back("+reserve-d2");
97 if (Args.hasArg(options::OPT_ffixed_d3))
98 Features.push_back("+reserve-d3");
99 if (Args.hasArg(options::OPT_ffixed_d4))
100 Features.push_back("+reserve-d4");
101 if (Args.hasArg(options::OPT_ffixed_d5))
102 Features.push_back("+reserve-d5");
103 if (Args.hasArg(options::OPT_ffixed_d6))
104 Features.push_back("+reserve-d6");
105 if (Args.hasArg(options::OPT_ffixed_d7))
106 Features.push_back("+reserve-d7");
107 }
108
getM68kFloatABI(const Driver & D,const ArgList & Args)109 m68k::FloatABI m68k::getM68kFloatABI(const Driver &D, const ArgList &Args) {
110 m68k::FloatABI ABI = m68k::FloatABI::Invalid;
111 if (Arg *A =
112 Args.getLastArg(options::OPT_msoft_float, options::OPT_mhard_float)) {
113
114 if (A->getOption().matches(options::OPT_msoft_float))
115 ABI = m68k::FloatABI::Soft;
116 else if (A->getOption().matches(options::OPT_mhard_float))
117 ABI = m68k::FloatABI::Hard;
118 }
119
120 // If unspecified, choose the default based on the platform.
121 if (ABI == m68k::FloatABI::Invalid)
122 ABI = m68k::FloatABI::Hard;
123
124 return ABI;
125 }
126