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1 //===-- MipsBaseInfo.h - Top level definitions for MIPS MC ------*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file contains small standalone helper functions and enum definitions for
11 // the Mips target useful for the compiler back-end and the MC libraries.
12 //
13 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSBASEINFO_H
15 #define LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSBASEINFO_H
16 
17 #include "MipsFixupKinds.h"
18 #include "MipsMCTargetDesc.h"
19 #include "llvm/MC/MCExpr.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 
95   enum {
96     //===------------------------------------------------------------------===//
97     // Instruction encodings.  These are the standard/most common forms for
98     // Mips instructions.
99     //
100 
101     // Pseudo - This represents an instruction that is a pseudo instruction
102     // or one that has not been implemented yet.  It is illegal to code generate
103     // it, but tolerated for intermediate implementation stages.
104     Pseudo   = 0,
105 
106     /// FrmR - This form is for instructions of the format R.
107     FrmR  = 1,
108     /// FrmI - This form is for instructions of the format I.
109     FrmI  = 2,
110     /// FrmJ - This form is for instructions of the format J.
111     FrmJ  = 3,
112     /// FrmFR - This form is for instructions of the format FR.
113     FrmFR = 4,
114     /// FrmFI - This form is for instructions of the format FI.
115     FrmFI = 5,
116     /// FrmOther - This form is for instructions that have no specific format.
117     FrmOther = 6,
118 
119     FormMask = 15,
120     /// IsCTI - Instruction is a Control Transfer Instruction.
121     IsCTI = 1 << 4,
122     /// HasForbiddenSlot - Instruction has a forbidden slot.
123     HasForbiddenSlot = 1 << 5
124 
125   };
126 }
127 }
128 
129 #endif
130