1 //===-- MipsBaseInfo.h - Top level definitions for MIPS MC ------*- 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 contains small standalone helper functions and enum definitions for
10 // the Mips target useful for the compiler back-end and the MC libraries.
11 //
12 //===----------------------------------------------------------------------===//
13 #ifndef LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSBASEINFO_H
14 #define LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSBASEINFO_H
15
16 #include "MipsFixupKinds.h"
17 #include "MipsMCTargetDesc.h"
18 #include "llvm/MC/MCExpr.h"
19 #include "llvm/MC/MCInstrDesc.h"
20 #include "llvm/Support/DataTypes.h"
21 #include "llvm/Support/ErrorHandling.h"
22
23 namespace llvm {
24
25 /// MipsII - This namespace holds all of the target specific flags that
26 /// instruction info tracks.
27 ///
28 namespace MipsII {
29 /// Target Operand Flag enum.
30 enum TOF {
31 //===------------------------------------------------------------------===//
32 // Mips Specific MachineOperand flags.
33
34 MO_NO_FLAG,
35
36 /// MO_GOT - Represents the offset into the global offset table at which
37 /// the address the relocation entry symbol resides during execution.
38 MO_GOT,
39
40 /// MO_GOT_CALL - Represents the offset into the global offset table at
41 /// which the address of a call site relocation entry symbol resides
42 /// during execution. This is different from the above since this flag
43 /// can only be present in call instructions.
44 MO_GOT_CALL,
45
46 /// MO_GPREL - Represents the offset from the current gp value to be used
47 /// for the relocatable object file being produced.
48 MO_GPREL,
49
50 /// MO_ABS_HI/LO - Represents the hi or low part of an absolute symbol
51 /// address.
52 MO_ABS_HI,
53 MO_ABS_LO,
54
55 /// MO_TLSGD - Represents the offset into the global offset table at which
56 // the module ID and TSL block offset reside during execution (General
57 // Dynamic TLS).
58 MO_TLSGD,
59
60 /// MO_TLSLDM - Represents the offset into the global offset table at which
61 // the module ID and TSL block offset reside during execution (Local
62 // Dynamic TLS).
63 MO_TLSLDM,
64 MO_DTPREL_HI,
65 MO_DTPREL_LO,
66
67 /// MO_GOTTPREL - Represents the offset from the thread pointer (Initial
68 // Exec TLS).
69 MO_GOTTPREL,
70
71 /// MO_TPREL_HI/LO - Represents the hi and low part of the offset from
72 // the thread pointer (Local Exec TLS).
73 MO_TPREL_HI,
74 MO_TPREL_LO,
75
76 // N32/64 Flags.
77 MO_GPOFF_HI,
78 MO_GPOFF_LO,
79 MO_GOT_DISP,
80 MO_GOT_PAGE,
81 MO_GOT_OFST,
82
83 /// MO_HIGHER/HIGHEST - Represents the highest or higher half word of a
84 /// 64-bit symbol address.
85 MO_HIGHER,
86 MO_HIGHEST,
87
88 /// MO_GOT_HI16/LO16, MO_CALL_HI16/LO16 - Relocations used for large GOTs.
89 MO_GOT_HI16,
90 MO_GOT_LO16,
91 MO_CALL_HI16,
92 MO_CALL_LO16,
93
94 /// Helper operand used to generate R_MIPS_JALR
95 MO_JALR
96 };
97
98 enum {
99 //===------------------------------------------------------------------===//
100 // Instruction encodings. These are the standard/most common forms for
101 // Mips instructions.
102 //
103
104 // Pseudo - This represents an instruction that is a pseudo instruction
105 // or one that has not been implemented yet. It is illegal to code generate
106 // it, but tolerated for intermediate implementation stages.
107 Pseudo = 0,
108
109 /// FrmR - This form is for instructions of the format R.
110 FrmR = 1,
111 /// FrmI - This form is for instructions of the format I.
112 FrmI = 2,
113 /// FrmJ - This form is for instructions of the format J.
114 FrmJ = 3,
115 /// FrmFR - This form is for instructions of the format FR.
116 FrmFR = 4,
117 /// FrmFI - This form is for instructions of the format FI.
118 FrmFI = 5,
119 /// FrmOther - This form is for instructions that have no specific format.
120 FrmOther = 6,
121
122 FormMask = 15,
123 /// IsCTI - Instruction is a Control Transfer Instruction.
124 IsCTI = 1 << 4,
125 /// HasForbiddenSlot - Instruction has a forbidden slot.
126 HasForbiddenSlot = 1 << 5,
127 /// HasFCCRegOperand - Instruction uses an $fcc<x> register.
128 HasFCCRegOperand = 1 << 6
129
130 };
131
132 enum OperandType : unsigned {
133 OPERAND_FIRST_MIPS_MEM_IMM = MCOI::OPERAND_FIRST_TARGET,
134 OPERAND_MEM_SIMM9 = OPERAND_FIRST_MIPS_MEM_IMM,
135 OPERAND_LAST_MIPS_MEM_IMM = OPERAND_MEM_SIMM9
136 };
137 }
138
getMSARegFromFReg(MCRegister Reg)139 inline static MCRegister getMSARegFromFReg(MCRegister Reg) {
140 if (Reg >= Mips::F0 && Reg <= Mips::F31)
141 return Reg - Mips::F0 + Mips::W0;
142 else if (Reg >= Mips::D0_64 && Reg <= Mips::D31_64)
143 return Reg - Mips::D0_64 + Mips::W0;
144 else
145 return Mips::NoRegister;
146 }
147 }
148
149 #endif
150