trap.isa revision 7741 
1// Copyright (c) 2006-2007 The Regents of The University of Michigan
2// All rights reserved.
3//
4// Redistribution and use in source and binary forms, with or without
5// modification, are permitted provided that the following conditions are
6// met: redistributions of source code must retain the above copyright
7// notice, this list of conditions and the following disclaimer;
8// redistributions in binary form must reproduce the above copyright
9// notice, this list of conditions and the following disclaimer in the
10// documentation and/or other materials provided with the distribution;
11// neither the name of the copyright holders nor the names of its
12// contributors may be used to endorse or promote products derived from
13// this software without specific prior written permission.
14//
15// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
18// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
19// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
21// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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25// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26//
27// Authors: Gabe Black
28//          Steve Reinhardt
29
30////////////////////////////////////////////////////////////////////
31//
32// Trap instructions
33//
34
35output header {{
36        /**
37         * Base class for trap instructions,
38         * or instructions that always fault.
39         */
40        class Trap : public SparcStaticInst
41        {
42          protected:
43
44            // Constructor
45            Trap(const char *mnem, ExtMachInst _machInst, OpClass __opClass) :
46                SparcStaticInst(mnem, _machInst, __opClass), trapNum(SW_TRAP)
47            {
48            }
49
50            std::string generateDisassembly(Addr pc,
51                    const SymbolTable *symtab) const;
52
53            int trapNum;
54        };
55}};
56
57output decoder {{
58        std::string
59        Trap::generateDisassembly(Addr pc, const SymbolTable *symtab) const
60        {
61            std::stringstream response;
62
63            printMnemonic(response, mnemonic);
64            ccprintf(response, " ");
65            printReg(response, _srcRegIdx[0]);
66            ccprintf(response, ", 0x%x", trapNum);
67            ccprintf(response, ", or ");
68            printReg(response, _srcRegIdx[1]);
69            return response.str();
70        }
71}};
72
73def template TrapExecute {{
74        Fault
75        %(class_name)s::execute(%(CPU_exec_context)s *xc,
76                Trace::InstRecord *traceData) const
77        {
78            Fault fault = NoFault;
79            %(op_decl)s;
80            %(op_rd)s;
81            %(code)s
82            return fault;
83        }
84}};
85
86def template FpUnimplExecute {{
87        Fault
88        %(class_name)s::execute(%(CPU_exec_context)s *xc,
89                Trace::InstRecord *traceData) const
90        {
91            Fault fault = NoFault;
92            %(op_decl)s;
93            %(op_rd)s;
94            %(code)s
95            %(op_wb)s;
96            return fault;
97        }
98}};
99
100def format Trap(code, *opt_flags) {{
101        iop = InstObjParams(name, Name, 'Trap', code, opt_flags)
102        header_output = BasicDeclare.subst(iop)
103        decoder_output = BasicConstructor.subst(iop)
104        decode_block = BasicDecode.subst(iop)
105        exec_output = TrapExecute.subst(iop)
106}};
107
108output header {{
109        class FpUnimpl : public SparcStaticInst
110        {
111          protected:
112            FpUnimpl(const char *mnem,
113                    ExtMachInst _machInst, OpClass __opClass)
114                : SparcStaticInst(mnem, _machInst, __opClass)
115            {
116            }
117
118            std::string
119            generateDisassembly(Addr pc,  const SymbolTable *symtab) const
120            {
121                return mnemonic;
122            }
123        };
124}};
125
126def format FpUnimpl(*flags) {{
127        fpunimpl_code = '''
128            Fsr = insertBits(Fsr, 16, 14, 3);
129            fault = new FpExceptionOther;
130            '''
131        iop = InstObjParams(name, Name, 'FpUnimpl', fpunimpl_code, flags)
132        header_output = BasicDeclare.subst(iop)
133        decoder_output = BasicConstructor.subst(iop)
134        decode_block = BasicDecode.subst(iop)
135        exec_output = FpUnimplExecute.subst(iop)
136}};
137