xref: /freebsd/contrib/llvm-project/llvm/lib/Target/X86/MCTargetDesc/X86MCTargetDesc.h (revision cfd6422a5217410fbd66f7a7a8a64d9d85e61229)
1 //===-- X86MCTargetDesc.h - X86 Target Descriptions -------------*- 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 // This file provides X86 specific target descriptions.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #ifndef LLVM_LIB_TARGET_X86_MCTARGETDESC_X86MCTARGETDESC_H
14 #define LLVM_LIB_TARGET_X86_MCTARGETDESC_X86MCTARGETDESC_H
15 
16 #include <memory>
17 #include <string>
18 
19 namespace llvm {
20 class formatted_raw_ostream;
21 class MCAsmBackend;
22 class MCCodeEmitter;
23 class MCContext;
24 class MCInst;
25 class MCInstPrinter;
26 class MCInstrInfo;
27 class MCObjectTargetWriter;
28 class MCObjectWriter;
29 class MCRegister;
30 class MCRegisterInfo;
31 class MCStreamer;
32 class MCSubtargetInfo;
33 class MCTargetOptions;
34 class MCTargetStreamer;
35 class Target;
36 class Triple;
37 class StringRef;
38 
39 /// Flavour of dwarf regnumbers
40 ///
41 namespace DWARFFlavour {
42   enum {
43     X86_64 = 0, X86_32_DarwinEH = 1, X86_32_Generic = 2
44   };
45 }
46 
47 ///  Native X86 register numbers
48 ///
49 namespace N86 {
50   enum {
51     EAX = 0, ECX = 1, EDX = 2, EBX = 3, ESP = 4, EBP = 5, ESI = 6, EDI = 7
52   };
53 }
54 
55 namespace X86_MC {
56 std::string ParseX86Triple(const Triple &TT);
57 
58 unsigned getDwarfRegFlavour(const Triple &TT, bool isEH);
59 
60 void initLLVMToSEHAndCVRegMapping(MCRegisterInfo *MRI);
61 
62 
63 /// Returns true if this instruction has a LOCK prefix.
64 bool hasLockPrefix(const MCInst &MI);
65 
66 /// Create a X86 MCSubtargetInfo instance. This is exposed so Asm parser, etc.
67 /// do not need to go through TargetRegistry.
68 MCSubtargetInfo *createX86MCSubtargetInfo(const Triple &TT, StringRef CPU,
69                                           StringRef FS);
70 }
71 
72 MCCodeEmitter *createX86MCCodeEmitter(const MCInstrInfo &MCII,
73                                       const MCRegisterInfo &MRI,
74                                       MCContext &Ctx);
75 
76 MCAsmBackend *createX86_32AsmBackend(const Target &T,
77                                      const MCSubtargetInfo &STI,
78                                      const MCRegisterInfo &MRI,
79                                      const MCTargetOptions &Options);
80 MCAsmBackend *createX86_64AsmBackend(const Target &T,
81                                      const MCSubtargetInfo &STI,
82                                      const MCRegisterInfo &MRI,
83                                      const MCTargetOptions &Options);
84 
85 /// Implements X86-only directives for assembly emission.
86 MCTargetStreamer *createX86AsmTargetStreamer(MCStreamer &S,
87                                              formatted_raw_ostream &OS,
88                                              MCInstPrinter *InstPrint,
89                                              bool isVerboseAsm);
90 
91 /// Implements X86-only directives for object files.
92 MCTargetStreamer *createX86ObjectTargetStreamer(MCStreamer &OS,
93                                                 const MCSubtargetInfo &STI);
94 
95 /// Construct an X86 Windows COFF machine code streamer which will generate
96 /// PE/COFF format object files.
97 ///
98 /// Takes ownership of \p AB and \p CE.
99 MCStreamer *createX86WinCOFFStreamer(MCContext &C,
100                                      std::unique_ptr<MCAsmBackend> &&AB,
101                                      std::unique_ptr<MCObjectWriter> &&OW,
102                                      std::unique_ptr<MCCodeEmitter> &&CE,
103                                      bool RelaxAll,
104                                      bool IncrementalLinkerCompatible);
105 
106 /// Construct an X86 Mach-O object writer.
107 std::unique_ptr<MCObjectTargetWriter>
108 createX86MachObjectWriter(bool Is64Bit, uint32_t CPUType, uint32_t CPUSubtype);
109 
110 /// Construct an X86 ELF object writer.
111 std::unique_ptr<MCObjectTargetWriter>
112 createX86ELFObjectWriter(bool IsELF64, uint8_t OSABI, uint16_t EMachine);
113 /// Construct an X86 Win COFF object writer.
114 std::unique_ptr<MCObjectTargetWriter>
115 createX86WinCOFFObjectWriter(bool Is64Bit);
116 
117 /// Returns the sub or super register of a specific X86 register.
118 /// e.g. getX86SubSuperRegister(X86::EAX, 16) returns X86::AX.
119 /// Aborts on error.
120 MCRegister getX86SubSuperRegister(MCRegister, unsigned, bool High=false);
121 
122 /// Returns the sub or super register of a specific X86 register.
123 /// Like getX86SubSuperRegister() but returns 0 on error.
124 MCRegister getX86SubSuperRegisterOrZero(MCRegister, unsigned,
125                                         bool High = false);
126 
127 } // End llvm namespace
128 
129 
130 // Defines symbolic names for X86 registers.  This defines a mapping from
131 // register name to register number.
132 //
133 #define GET_REGINFO_ENUM
134 #include "X86GenRegisterInfo.inc"
135 
136 // Defines symbolic names for the X86 instructions.
137 //
138 #define GET_INSTRINFO_ENUM
139 #define GET_INSTRINFO_MC_HELPER_DECLS
140 #include "X86GenInstrInfo.inc"
141 
142 #define GET_SUBTARGETINFO_ENUM
143 #include "X86GenSubtargetInfo.inc"
144 
145 #endif
146