6bf71f96f3
Now, must create g++ compilable code ...
arch/mips/isa/decoder.isa:
missing a '}' ... edited a few instruction decodings ...
arch/mips/isa/formats.isa:
rearranged #include
arch/mips/isa/formats/branch.isa:
add Branch Likely and Unconditional format
arch/mips/isa/formats/int.isa:
move OperateNopCheckDecode template to another file ...
arch/mips/isa/formats/noop.isa:
change Alpha to Mips in noop.isa
--HG--
extra : convert_revision : 4bf955fa6dffbbc99fb95fee7878f691e3df5424
88 lines
2.2 KiB
C++
88 lines
2.2 KiB
C++
// -*- mode:c++ -*-
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////////////////////////////////////////////////////////////////////
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//
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// Nop
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//
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output header {{
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/**
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* Static instruction class for no-ops. This is a leaf class.
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*/
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class Nop : public MipsStaticInst
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{
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/// Disassembly of original instruction.
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const std::string originalDisassembly;
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public:
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/// Constructor
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Nop(const std::string _originalDisassembly, MachInst _machInst)
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: MipsStaticInst("nop", _machInst, No_OpClass),
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originalDisassembly(_originalDisassembly)
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{
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flags[IsNop] = true;
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}
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~Nop() { }
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std::string
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generateDisassembly(Addr pc, const SymbolTable *symtab) const;
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%(BasicExecDeclare)s
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};
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}};
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output decoder {{
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std::string Nop::generateDisassembly(Addr pc,
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const SymbolTable *symtab) const
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{
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#ifdef SS_COMPATIBLE_DISASSEMBLY
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return originalDisassembly;
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#else
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return csprintf("%-10s (%s)", "nop", originalDisassembly);
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#endif
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}
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/// Helper function for decoding nops. Substitute Nop object
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/// for original inst passed in as arg (and delete latter).
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inline
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MipsStaticInst *
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makeNop(MipsStaticInst *inst)
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{
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MipsStaticInst *nop = new Nop(inst->disassemble(0), inst->machInst);
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delete inst;
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return nop;
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}
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}};
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output exec {{
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Fault
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Nop::execute(%(CPU_exec_context)s *, Trace::InstRecord *) const
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{
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return No_Fault;
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}
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}};
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// integer & FP operate instructions use Rc as dest, so check for
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// Rc == 31 to detect nops
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def template OperateNopCheckDecode {{
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{
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MipsStaticInst *i = new %(class_name)s(machInst);
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if (RC == 31) {
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i = makeNop(i);
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}
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return i;
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}
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}};
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// Like BasicOperate format, but generates NOP if RC/FC == 31
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def format BasicOperateWithNopCheck(code, *opt_args) {{
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iop = InstObjParams(name, Name, 'MipsStaticInst', CodeBlock(code),
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opt_args)
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header_output = BasicDeclare.subst(iop)
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decoder_output = BasicConstructor.subst(iop)
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decode_block = OperateNopCheckDecode.subst(iop)
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exec_output = BasicExecute.subst(iop)
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}};
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