specop.isa revision 6047 
1// Copyright (c) 2007-2008 The Hewlett-Packard Development Company
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41//
42// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
43// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
44// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
45// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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52// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
53//
54// Authors: Gabe Black
55
56//////////////////////////////////////////////////////////////////////////
57//
58// Fault Microop
59//
60//////////////////////////////////////////////////////////////////////////
61
62output header {{
63    class MicroFaultBase : public X86ISA::X86MicroopBase
64    {
65      protected:
66        Fault fault;
67        uint8_t cc;
68
69      public:
70        MicroFaultBase(ExtMachInst _machInst, const char * instMnem,
71                bool isMicro, bool isDelayed, bool isFirst, bool isLast,
72                Fault _fault, uint8_t _cc);
73
74        MicroFaultBase(ExtMachInst _machInst, const char * instMnem,
75                Fault _fault, uint8_t _cc);
76
77        std::string generateDisassembly(Addr pc,
78                const SymbolTable *symtab) const;
79    };
80
81    class MicroHalt : public X86ISA::X86MicroopBase
82    {
83      public:
84        MicroHalt(ExtMachInst _machInst, const char * instMnem,
85                bool isMicro, bool isDelayed, bool isFirst, bool isLast) :
86            X86MicroopBase(_machInst, "halt", instMnem,
87                    isMicro, isDelayed, isFirst, isLast, No_OpClass)
88        {
89        }
90
91        MicroHalt(ExtMachInst _machInst, const char * instMnem) :
92            X86MicroopBase(_machInst, "halt", instMnem,
93                    false, false, false, false, No_OpClass)
94        {
95        }
96
97        %(BasicExecDeclare)s
98
99        std::string generateDisassembly(Addr pc,
100                const SymbolTable *symtab) const;
101    };
102}};
103
104def template MicroFaultDeclare {{
105    class %(class_name)s : public %(base_class)s
106    {
107      private:
108        void buildMe();
109      public:
110        %(class_name)s(ExtMachInst _machInst, const char * instMnem,
111                bool isMicro, bool isDelayed, bool isFirst, bool isLast,
112                Fault _fault, uint8_t _cc);
113
114        %(class_name)s(ExtMachInst _machInst, const char * instMnem,
115                Fault _fault, uint8_t _cc);
116
117        %(BasicExecDeclare)s
118    };
119}};
120
121def template MicroFaultExecute {{
122        Fault %(class_name)s::execute(%(CPU_exec_context)s *xc,
123                Trace::InstRecord *traceData) const
124        {
125            %(op_decl)s;
126            %(op_rd)s;
127            if (%(cond_test)s) {
128                //Return the fault we were constructed with
129                return fault;
130            } else {
131                return NoFault;
132            }
133        }
134}};
135
136output exec {{
137    Fault
138    MicroHalt::execute(%(CPU_exec_context)s *xc,
139            Trace::InstRecord * traceData) const
140    {
141        xc->tcBase()->suspend();
142        return NoFault;
143    }
144}};
145
146output decoder {{
147    inline MicroFaultBase::MicroFaultBase(
148            ExtMachInst machInst, const char * instMnem,
149            Fault _fault, uint8_t _cc) :
150        X86MicroopBase(machInst, "fault", instMnem,
151                false, false, false, false, No_OpClass),
152        fault(_fault), cc(_cc)
153    {
154    }
155
156    inline MicroFaultBase::MicroFaultBase(
157            ExtMachInst machInst, const char * instMnem,
158            bool isMicro, bool isDelayed, bool isFirst, bool isLast,
159            Fault _fault, uint8_t _cc) :
160        X86MicroopBase(machInst, "fault", instMnem,
161                isMicro, isDelayed, isFirst, isLast, No_OpClass),
162                fault(_fault), cc(_cc)
163    {
164    }
165}};
166
167def template MicroFaultConstructor {{
168
169    inline void %(class_name)s::buildMe()
170    {
171        %(constructor)s;
172    }
173
174    inline %(class_name)s::%(class_name)s(
175            ExtMachInst machInst, const char * instMnem,
176            Fault _fault, uint8_t _cc) :
177        %(base_class)s(machInst, instMnem, _fault, _cc)
178    {
179        buildMe();
180    }
181
182    inline %(class_name)s::%(class_name)s(
183            ExtMachInst machInst, const char * instMnem,
184            bool isMicro, bool isDelayed, bool isFirst, bool isLast,
185            Fault _fault, uint8_t _cc) :
186        %(base_class)s(machInst, instMnem,
187                isMicro, isDelayed, isFirst, isLast, _fault, _cc)
188    {
189        buildMe();
190    }
191}};
192
193output decoder {{
194    std::string MicroFaultBase::generateDisassembly(Addr pc,
195            const SymbolTable *symtab) const
196    {
197        std::stringstream response;
198
199        printMnemonic(response, instMnem, mnemonic);
200        if(fault)
201            response << fault->name();
202        else
203            response << "No Fault";
204
205        return response.str();
206    }
207
208    std::string MicroHalt::generateDisassembly(Addr pc,
209            const SymbolTable *symtab) const
210    {
211        std::stringstream response;
212
213        printMnemonic(response, instMnem, mnemonic);
214
215        return response.str();
216    }
217}};
218
219let {{
220    class Fault(X86Microop):
221        className = "MicroFault"
222        def __init__(self, fault, flags=None):
223            self.fault = fault
224            if flags:
225                if not isinstance(flags, (list, tuple)):
226                    raise Exception, "flags must be a list or tuple of flags"
227                self.cond = " | ".join(flags)
228                self.className += "Flags"
229            else:
230                self.cond = "0"
231
232        def getAllocator(self, *microFlags):
233            allocator = '''new %(class_name)s(machInst, macrocodeBlock
234                    %(flags)s, %(fault)s, %(cc)s)''' % {
235                "class_name" : self.className,
236                "flags" : self.microFlagsText(microFlags),
237                "fault" : self.fault,
238                "cc" : self.cond}
239            return allocator
240
241    iop = InstObjParams("fault", "MicroFaultFlags", "MicroFaultBase",
242            {"code": "",
243             "cond_test": "checkCondition(ccFlagBits, cc)"})
244    exec_output = MicroFaultExecute.subst(iop)
245    header_output = MicroFaultDeclare.subst(iop)
246    decoder_output = MicroFaultConstructor.subst(iop)
247    iop = InstObjParams("fault", "MicroFault", "MicroFaultBase",
248            {"code": "",
249             "cond_test": "true"})
250    exec_output += MicroFaultExecute.subst(iop)
251    header_output += MicroFaultDeclare.subst(iop)
252    decoder_output += MicroFaultConstructor.subst(iop)
253    microopClasses["fault"] = Fault
254
255    class Halt(X86Microop):
256        className = "MicroHalt"
257        def __init__(self):
258            pass
259
260        def getAllocator(self, *microFlags):
261            return "new MicroHalt(machInst, macrocodeBlock %s)" % \
262                    self.microFlagsText(microFlags)
263
264    microopClasses["halt"] = Halt
265}};
266