int.isa revision 2706:d88c27f75121 
1// -*- mode:c++ -*-
2
3// Copyright (c) 2003-2006 The Regents of The University of Michigan
4// All rights reserved.
5//
6// Redistribution and use in source and binary forms, with or without
7// modification, are permitted provided that the following conditions are
8// met: redistributions of source code must retain the above copyright
9// notice, this list of conditions and the following disclaimer;
10// redistributions in binary form must reproduce the above copyright
11// notice, this list of conditions and the following disclaimer in the
12// documentation and/or other materials provided with the distribution;
13// neither the name of the copyright holders nor the names of its
14// contributors may be used to endorse or promote products derived from
15// this software without specific prior written permission.
16//
17// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28//
29// Authors: Korey Sewell
30
31////////////////////////////////////////////////////////////////////
32//
33// Integer operate instructions
34//
35output header {{
36#include <iostream>
37    using namespace std;
38        /**
39         * Base class for integer operations.
40         */
41        class IntOp : public MipsStaticInst
42        {
43                protected:
44
45                /// Constructor
46                IntOp(const char *mnem, MachInst _machInst, OpClass __opClass) :
47                                MipsStaticInst(mnem, _machInst, __opClass)
48                {
49                }
50
51                std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const;
52        };
53
54
55        class HiLoOp: public IntOp
56        {
57                protected:
58
59                /// Constructor
60                HiLoOp(const char *mnem, MachInst _machInst, OpClass __opClass) :
61                                IntOp(mnem, _machInst, __opClass)
62                {
63                }
64
65                std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const;
66        };
67
68        class HiLoMiscOp: public HiLoOp
69        {
70                protected:
71
72                /// Constructor
73                HiLoMiscOp(const char *mnem, MachInst _machInst, OpClass __opClass) :
74                                HiLoOp(mnem, _machInst, __opClass)
75                {
76                }
77
78                std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const;
79        };
80
81
82        class IntImmOp : public MipsStaticInst
83        {
84                protected:
85
86                int16_t imm;
87                int32_t sextImm;
88                uint32_t zextImm;
89
90                /// Constructor
91                IntImmOp(const char *mnem, MachInst _machInst, OpClass __opClass) :
92                    MipsStaticInst(mnem, _machInst, __opClass),imm(INTIMM),
93                    sextImm(INTIMM),zextImm(0x0000FFFF & INTIMM)
94                {
95                    //If Bit 15 is 1 then Sign Extend
96                    int32_t temp = sextImm & 0x00008000;
97                    if (temp > 0 && mnemonic != "lui") {
98                        sextImm |= 0xFFFF0000;
99                    }
100                }
101
102                std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const;
103
104
105        };
106
107}};
108
109// HiLo<Misc> instruction class execute method template.
110// Mainly to get instruction trace data to print out
111// correctly
112def template HiLoExecute {{
113        Fault %(class_name)s::execute(%(CPU_exec_context)s *xc, Trace::InstRecord *traceData) const
114        {
115                Fault fault = NoFault;
116
117                %(fp_enable_check)s;
118                %(op_decl)s;
119                %(op_rd)s;
120                %(code)s;
121
122                if(fault == NoFault)
123                {
124                    %(op_wb)s;
125                    //If there are 2 Destination Registers then
126                    //concatenate the values for the traceData
127                    if(traceData && _numDestRegs == 2) {
128                        uint64_t hilo_final_val = (uint64_t)HI << 32 | LO;
129                        traceData->setData(hilo_final_val);
130                    }
131                }
132                return fault;
133        }
134}};
135
136//Outputs to decoder.cc
137output decoder {{
138        std::string IntOp::generateDisassembly(Addr pc, const SymbolTable *symtab) const
139        {
140            std::stringstream ss;
141
142            ccprintf(ss, "%-10s ", mnemonic);
143
144            // just print the first dest... if there's a second one,
145            // it's generally implicit
146            if (_numDestRegs > 0) {
147                printReg(ss, _destRegIdx[0]);
148                ss << ", ";
149            }
150
151            // just print the first two source regs... if there's
152            // a third one, it's a read-modify-write dest (Rc),
153            // e.g. for CMOVxx
154            if (_numSrcRegs > 0) {
155                printReg(ss, _srcRegIdx[0]);
156            }
157
158            if (_numSrcRegs > 1) {
159                ss << ", ";
160                printReg(ss, _srcRegIdx[1]);
161            }
162
163            return ss.str();
164        }
165
166        std::string HiLoOp::generateDisassembly(Addr pc, const SymbolTable *symtab) const
167        {
168            std::stringstream ss;
169
170            ccprintf(ss, "%-10s ", mnemonic);
171
172            //Destination Registers are implicit for HI/LO ops
173            if (_numSrcRegs > 0) {
174                printReg(ss, _srcRegIdx[0]);
175            }
176
177            if (_numSrcRegs > 1) {
178                ss << ", ";
179                printReg(ss, _srcRegIdx[1]);
180            }
181
182            return ss.str();
183        }
184
185        std::string HiLoMiscOp::generateDisassembly(Addr pc, const SymbolTable *symtab) const
186        {
187            std::stringstream ss;
188
189            ccprintf(ss, "%-10s ", mnemonic);
190
191            if (_numDestRegs > 0 && _destRegIdx[0] < 32) {
192                printReg(ss, _destRegIdx[0]);
193            } else if (_numSrcRegs > 0 && _srcRegIdx[0] < 32) {
194                printReg(ss, _srcRegIdx[0]);
195            }
196
197            return ss.str();
198        }
199
200        std::string IntImmOp::generateDisassembly(Addr pc, const SymbolTable *symtab) const
201        {
202            std::stringstream ss;
203
204            ccprintf(ss, "%-10s ", mnemonic);
205
206            if (_numDestRegs > 0) {
207                printReg(ss, _destRegIdx[0]);
208            }
209
210            ss << ", ";
211
212            if (_numSrcRegs > 0) {
213                printReg(ss, _srcRegIdx[0]);
214                ss << ", ";
215            }
216
217            if( mnemonic == "lui")
218                ccprintf(ss, "0x%x ", sextImm);
219            else
220                ss << (int) sextImm;
221
222            return ss.str();
223        }
224
225}};
226
227def format IntOp(code, *opt_flags) {{
228    iop = InstObjParams(name, Name, 'IntOp', CodeBlock(code), opt_flags)
229    header_output = BasicDeclare.subst(iop)
230    decoder_output = BasicConstructor.subst(iop)
231    decode_block = OperateNopCheckDecode.subst(iop)
232    exec_output = BasicExecute.subst(iop)
233}};
234
235def format IntImmOp(code, *opt_flags) {{
236    iop = InstObjParams(name, Name, 'IntImmOp', CodeBlock(code), opt_flags)
237    header_output = BasicDeclare.subst(iop)
238    decoder_output = BasicConstructor.subst(iop)
239    decode_block = OperateNopCheckDecode.subst(iop)
240    exec_output = BasicExecute.subst(iop)
241}};
242
243def format HiLoOp(code, *opt_flags) {{
244    if '.sd' in code:
245        code = 'int64_t ' + code
246    elif '.ud' in code:
247        code = 'uint64_t ' + code
248
249    code += 'HI = val<63:32>;\n'
250    code += 'LO = val<31:0>;\n'
251
252    iop = InstObjParams(name, Name, 'HiLoOp', CodeBlock(code), opt_flags)
253    header_output = BasicDeclare.subst(iop)
254    decoder_output = BasicConstructor.subst(iop)
255    decode_block = OperateNopCheckDecode.subst(iop)
256    exec_output = HiLoExecute.subst(iop)
257}};
258
259def format HiLoMiscOp(code, *opt_flags) {{
260    iop = InstObjParams(name, Name, 'HiLoMiscOp', CodeBlock(code), opt_flags)
261    header_output = BasicDeclare.subst(iop)
262    decoder_output = BasicConstructor.subst(iop)
263    decode_block = OperateNopCheckDecode.subst(iop)
264    exec_output = HiLoExecute.subst(iop)
265}};
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