SparcInstrFormats.td revision 96b84beb77d5209d2d5db4db9a6dc07461de2f7e 
1//===- SparcV8InstrFormats.td - SparcV8 Instr Formats ------*- tablegen -*-===//
2// 
3//                     The LLVM Compiler Infrastructure
4//
5// This file was developed by the LLVM research group and is distributed under
6// the University of Illinois Open Source License. See LICENSE.TXT for details.
7// 
8//===----------------------------------------------------------------------===//
9
10//===----------------------------------------------------------------------===//
11// Format #2 instruction classes in the SparcV8
12//===----------------------------------------------------------------------===//
13
14class F2 : InstV8 {                   // Format 2 instructions
15  bits<3>  op2;
16  bits<22> imm22;
17  let op          = 0;    // op = 0
18  let Inst{24-22} = op2;
19  let Inst{21-0}  = imm22;
20}
21
22// Specific F2 classes: SparcV8 manual, page 44
23//
24class F2_1<bits<3> op2Val, string name> : F2 {
25  bits<5>  rd;
26
27  let op2         = op2Val;
28  let Name        = name;
29
30  let Inst{29-25} = rd;
31}
32
33class F2_2<bits<4> condVal, bits<3> op2Val, string name> : F2 {
34  bits<4>   cond;
35  bit       annul = 0;     // currently unused
36
37  let cond        = condVal;
38  let op2         = op2Val;
39  let Name        = name;
40
41  let Inst{29}    = annul;
42  let Inst{28-25} = cond;
43}
44
45//===----------------------------------------------------------------------===//
46// Format #3 instruction classes in the SparcV8
47//===----------------------------------------------------------------------===//
48
49class F3 : InstV8 {
50  bits<5> rd;
51  bits<6> op3;
52  bits<5> rs1;
53  let op{1} = 1;   // Op = 2 or 3
54  let Inst{29-25} = rd;
55  let Inst{24-19} = op3;
56  let Inst{18-14} = rs1;
57}
58
59// Specific F3 classes: SparcV8 manual, page 44
60//
61class F3_1<bits<2> opVal, bits<6> op3val, dag ops, string name> : F3 {
62  bits<8> asi = 0; // asi not currently used in SparcV8
63  bits<5> rs2;
64
65  dag OperandList = ops;
66
67  let op         = opVal;
68  let op3        = op3val;
69  let Name       = name;
70
71  let Inst{13}   = 0;     // i field = 0
72  let Inst{12-5} = asi;   // address space identifier
73  let Inst{4-0}  = rs2;
74}
75
76class F3_2<bits<2> opVal, bits<6> op3val, dag ops, string name> : F3 {
77  bits<13> simm13;
78
79  dag OperandList = ops;
80  
81  let op         = opVal;
82  let op3        = op3val;
83  let Name       = name;
84
85  let Inst{13}   = 1;     // i field = 1
86  let Inst{12-0} = simm13;
87}
88
89// floating-point
90class F3_3<bits<2> opVal, bits<6> op3val, bits<9> opfval, string name> : F3 {
91  bits<5> rs2;
92
93  let op         = opVal;
94  let op3        = op3val;
95  let Name       = name;
96
97  let Inst{13-5} = opfval;   // fp opcode
98  let Inst{4-0}  = rs2;
99}
100