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_GOT16 - Represents the offset into the global offset table at which
37     /// the address the relocation entry symbol resides during execution.
38     MO_GOT16,
39     MO_GOT,
40 
41     /// MO_GOT_CALL - Represents the offset into the global offset table at
42     /// which the address of a call site relocation entry symbol resides
43     /// during execution. This is different from the above since this flag
44     /// can only be present in call instructions.
45     MO_GOT_CALL,
46 
47     /// MO_GPREL - Represents the offset from the current gp value to be used
48     /// for the relocatable object file being produced.
49     MO_GPREL,
50 
51     /// MO_ABS_HI/LO - Represents the hi or low part of an absolute symbol
52     /// address.
53     MO_ABS_HI,
54     MO_ABS_LO,
55 
56     /// MO_TLSGD - Represents the offset into the global offset table at which
57     // the module ID and TSL block offset reside during execution (General
58     // Dynamic TLS).
59     MO_TLSGD,
60 
61     /// MO_TLSLDM - Represents the offset into the global offset table at which
62     // the module ID and TSL block offset reside during execution (Local
63     // Dynamic TLS).
64     MO_TLSLDM,
65     MO_DTPREL_HI,
66     MO_DTPREL_LO,
67 
68     /// MO_GOTTPREL - Represents the offset from the thread pointer (Initial
69     // Exec TLS).
70     MO_GOTTPREL,
71 
72     /// MO_TPREL_HI/LO - Represents the hi and low part of the offset from
73     // the thread pointer (Local Exec TLS).
74     MO_TPREL_HI,
75     MO_TPREL_LO,
76 
77     // N32/64 Flags.
78     MO_GPOFF_HI,
79     MO_GPOFF_LO,
80     MO_GOT_DISP,
81     MO_GOT_PAGE,
82     MO_GOT_OFST,
83 
84     /// MO_HIGHER/HIGHEST - Represents the highest or higher half word of a
85     /// 64-bit symbol address.
86     MO_HIGHER,
87     MO_HIGHEST,
88 
89     /// MO_GOT_HI16/LO16, MO_CALL_HI16/LO16 - Relocations used for large GOTs.
90     MO_GOT_HI16,
91     MO_GOT_LO16,
92     MO_CALL_HI16,
93     MO_CALL_LO16
94   };
95 
96   enum {
97     //===------------------------------------------------------------------===//
98     // Instruction encodings.  These are the standard/most common forms for
99     // Mips instructions.
100     //
101 
102     // Pseudo - This represents an instruction that is a pseudo instruction
103     // or one that has not been implemented yet.  It is illegal to code generate
104     // it, but tolerated for intermediate implementation stages.
105     Pseudo   = 0,
106 
107     /// FrmR - This form is for instructions of the format R.
108     FrmR  = 1,
109     /// FrmI - This form is for instructions of the format I.
110     FrmI  = 2,
111     /// FrmJ - This form is for instructions of the format J.
112     FrmJ  = 3,
113     /// FrmFR - This form is for instructions of the format FR.
114     FrmFR = 4,
115     /// FrmFI - This form is for instructions of the format FI.
116     FrmFI = 5,
117     /// FrmOther - This form is for instructions that have no specific format.
118     FrmOther = 6,
119 
120     FormMask = 15
121   };
122 }
123 }
124 
125 #endif
126