SparcInstrFormats.td revision 17187e936a37171260b81b838a411db128fb1690 
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  bits<22> imm;
27
28  let op2         = op2Val;
29  let Name        = name;
30
31  let Inst{29-25} = rd;
32}
33
34class F2_2<bits<4> condVal, bits<3> op2Val, string name> : F2 {
35  bits<4>   cond;
36  bit       annul = 0;     // currently unused
37
38  let cond        = condVal;
39  let op2         = op2Val;
40  let Name        = name;
41
42  let Inst{29}    = annul;
43  let Inst{28-25} = cond;
44}
45
46//===----------------------------------------------------------------------===//
47// Format #3 instruction classes in the SparcV8
48//===----------------------------------------------------------------------===//
49
50class F3 : InstV8 {
51  bits<5> rd;
52  bits<6> op3;
53  bits<5> rs1;
54  let op{1} = 1;   // Op = 2 or 3
55  let Inst{29-25} = rd;
56  let Inst{24-19} = op3;
57  let Inst{18-14} = rs1;
58}
59
60// Specific F3 classes: SparcV8 manual, page 44
61//
62class F3_1<bits<2> opVal, bits<6> op3val, string name> : F3 {
63  bits<8> asi = 0; // asi not currently used in SparcV8
64  bits<5> rs2;
65
66  let op         = opVal;
67  let op3        = op3val;
68  let Name       = name;
69
70  let Inst{13}   = 0;     // i field = 0
71  let Inst{12-5} = asi;   // address space identifier
72  let Inst{4-0}  = rs2;
73}
74
75class F3_2<bits<2> opVal, bits<6> op3val, string name> : F3 {
76  bits<13> simm13;
77
78  let op         = opVal;
79  let op3        = op3val;
80  let Name       = name;
81
82  let Inst{13}   = 1;     // i field = 1
83  let Inst{12-0} = simm13;
84}
85
86// floating-point
87class F3_3<bits<2> opVal, bits<6> op3val, bits<9> opfval, string name> : F3 {
88  bits<5> rs2;
89
90  let op         = opVal;
91  let op3        = op3val;
92  let Name       = name;
93
94  let Inst{13-5} = opfval;   // fp opcode
95  let Inst{4-0}  = rs2;
96}
97