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Create and use LZCOUNT Pcode op

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This commit is contained in:
Pokechu22 2022-07-11 12:40:19 -07:00
parent 865cd22cab
commit 14880b53c4
47 changed files with 288 additions and 247 deletions
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6
Ghidra/Features/Decompiler/src/decompile/cpp/opbehavior.cc
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@ -102,6 +102,7 @@ void OpBehavior::registerInstructions(vector<OpBehavior *> &inst,const Translate
inst[CPUI_INSERT] = new OpBehavior(CPUI_INSERT,false);
inst[CPUI_EXTRACT] = new OpBehavior(CPUI_EXTRACT,false);
inst[CPUI_POPCOUNT] = new OpBehaviorPopcount();
inst[CPUI_LZCOUNT] = new OpBehaviorLzcount();
}
/// \param sizeout is the size of the output in bytes
@ -757,3 +758,8 @@ uintb OpBehaviorPopcount::evaluateUnary(int4 sizeout,int4 sizein,uintb in1) cons
return (uintb)popcount(in1);
}
uintb OpBehaviorLzcount::evaluateUnary(int4 sizeout,int4 sizein,uintb in1) const
{
return (uintb)(count_leading_zeros(in1) - 8*(sizeof(uintb) - sizein));
}