unimp.isa (12236:126ac9da6050) unimp.isa (12291:2c0d8c31fc3d)
1// -*- mode:c++ -*-
2
3// Copyright (c) 2003-2005 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

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28//
29// Authors: Steve Reinhardt
30
31////////////////////////////////////////////////////////////////////
32//
33// Unimplemented instructions
34//
35
1// -*- mode:c++ -*-
2
3// Copyright (c) 2003-2005 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

--- 19 unchanged lines hidden (view full) ---

28//
29// Authors: Steve Reinhardt
30
31////////////////////////////////////////////////////////////////////
32//
33// Unimplemented instructions
34//
35
36output header {{
37 /**
38 * Static instruction class for unimplemented instructions that
39 * cause simulator termination. Note that these are recognized
40 * (legal) instructions that the simulator does not support; the
41 * 'Unknown' class is used for unrecognized/illegal instructions.
42 * This is a leaf class.
43 */
44 class FailUnimplemented : public SparcStaticInst
45 {
46 public:
47 /// Constructor
48 FailUnimplemented(const char *_mnemonic, ExtMachInst _machInst)
49 : SparcStaticInst(_mnemonic, _machInst, No_OpClass)
50 {
51 // don't call execute() (which panics) if we're on a
52 // speculative path
53 flags[IsNonSpeculative] = true;
54 }
55
56 Fault execute(ExecContext *, Trace::InstRecord *) const;
57
58 std::string
59 generateDisassembly(Addr pc, const SymbolTable *symtab) const;
60 };
61
62 /**
63 * Base class for unimplemented instructions that cause a warning
64 * to be printed (but do not terminate simulation). This
65 * implementation is a little screwy in that it will print a
66 * warning for each instance of a particular unimplemented machine
67 * instruction, not just for each unimplemented opcode. Should
68 * probably make the 'warned' flag a static member of the derived
69 * class.
70 */
71 class WarnUnimplemented : public SparcStaticInst
72 {
73 private:
74 /// Have we warned on this instruction yet?
75 mutable bool warned;
76
77 public:
78 /// Constructor
79 WarnUnimplemented(const char *_mnemonic, ExtMachInst _machInst)
80 : SparcStaticInst(_mnemonic, _machInst, No_OpClass), warned(false)
81 {
82 // don't call execute() (which panics) if we're on a
83 // speculative path
84 flags[IsNonSpeculative] = true;
85 }
86
87 Fault execute(ExecContext *, Trace::InstRecord *) const;
88
89 std::string
90 generateDisassembly(Addr pc, const SymbolTable *symtab) const;
91 };
92}};
93
94output decoder {{
95 std::string
96 FailUnimplemented::generateDisassembly(Addr pc,
97 const SymbolTable *symtab) const
98 {
99 return csprintf("%-10s (unimplemented)", mnemonic);
100 }
101
102 std::string
103 WarnUnimplemented::generateDisassembly(Addr pc,
104 const SymbolTable *symtab) const
105 {
106 return csprintf("%-10s (unimplemented)", mnemonic);
107 }
108}};
109
110output exec {{
111 Fault
112 FailUnimplemented::execute(ExecContext *xc,
113 Trace::InstRecord *traceData) const
114 {
115 panic("attempt to execute unimplemented instruction '%s' "
116 "(inst 0x%08x)", mnemonic, machInst);
117 return NoFault;
118 }
119
120 Fault
121 WarnUnimplemented::execute(ExecContext *xc,
122 Trace::InstRecord *traceData) const
123 {
124 if (!warned) {
125 warn("instruction '%s' unimplemented\n", mnemonic);
126 warned = true;
127 }
128
129 return NoFault;
130 }
131}};
132
133
134def format FailUnimpl() {{
135 iop = InstObjParams(name, 'FailUnimplemented')
136 decode_block = BasicDecodeWithMnemonic.subst(iop)
137}};
138
139def format WarnUnimpl() {{
140 iop = InstObjParams(name, 'WarnUnimplemented')
141 decode_block = BasicDecodeWithMnemonic.subst(iop)
142}};
143
36def format FailUnimpl() {{
37 iop = InstObjParams(name, 'FailUnimplemented')
38 decode_block = BasicDecodeWithMnemonic.subst(iop)
39}};
40
41def format WarnUnimpl() {{
42 iop = InstObjParams(name, 'WarnUnimplemented')
43 decode_block = BasicDecodeWithMnemonic.subst(iop)
44}};
45