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Implement msub/msubu

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This commit is contained in:
Henrik Rydgard 2012-11-07 16:18:37 +01:00
parent 1391d83afd
commit dc86fbe818
2 changed files with 22 additions and 2 deletions
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20
Core/MIPS/MIPSInt.cpp
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@ -525,6 +525,26 @@ namespace MIPSInt
HI = (u32)(result>>32);
}
break;
case 46: //msub
{
u32 a=R(rs),b=R(rt),hi=HI,lo=LO;
u64 origValBits = (u64)lo | ((u64)(hi)<<32);
s64 origVal = (s64)origValBits;
s64 result = origVal - (s64)(s32)a * (s64)(s32)b;
u64 resultBits = (u64)(result);
LO = (u32)(resultBits);
HI = (u32)(resultBits>>32);
}
break;
case 47: //msubu
{
u32 a=R(rs),b=R(rt),hi=HI,lo=LO;
u64 origVal = (u64)lo | ((u64)(hi)<<32);
u64 result = origVal - (u64)a * (u64)b;
LO = (u32)(result);
HI = (u32)(result>>32);
}
break;
case 16: R(rd) = HI; break; //mfhi
case 17: HI = R(rs); break; //mthi
case 18: R(rd) = LO; break; //mflo

4
Core/MIPS/MIPSTables.cpp
View File

@ -227,8 +227,8 @@ const MIPSInstruction tableSpecial[64] = /// 000000 ...... ...... .......... xxx
INSTR("sltu", &Jit::Comp_Generic, Dis_RType3, Int_RType3,IN_RS|IN_RT|OUT_RD),
INSTR("max", &Jit::Comp_Generic, Dis_RType3, Int_RType3,IN_RS|IN_RT|OUT_RD),
INSTR("min", &Jit::Comp_Generic, Dis_RType3, Int_RType3,IN_RS|IN_RT|OUT_RD),
{-2},
{-2},
INSTR("msub", &Jit::Comp_Generic, Dis_MulDivType, Int_MulDivType, IN_RS|IN_RT|OUT_OTHER),
INSTR("msubu", &Jit::Comp_Generic, Dis_MulDivType, Int_MulDivType, IN_RS|IN_RT|OUT_OTHER),
//48
INSTR("tge", &Jit::Comp_Generic, Dis_RType3, 0, 0),