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[SOFT386]

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Implement the AAM and AAD instructions.


svn path=/branches/ntvdm/; revision=60342
This commit is contained in:
Aleksandar Andrejevic 2013-09-23 16:03:23 +00:00
parent b5a9d7490a
commit 442b56b45b
1 changed files with 60 additions and 6 deletions
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66
lib/soft386/opcodes.c
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@ -4525,18 +4525,72 @@ SOFT386_OPCODE_HANDLER(Soft386OpcodeIret)
SOFT386_OPCODE_HANDLER(Soft386OpcodeAam)
{
// TODO: NOT IMPLEMENTED
UNIMPLEMENTED;
UCHAR Base;
UCHAR Value = State->GeneralRegs[SOFT386_REG_EAX].LowByte;
return FALSE;
if (State->PrefixFlags & SOFT386_PREFIX_LOCK)
{
/* Invalid prefix */
Soft386Exception(State, SOFT386_EXCEPTION_UD);
return FALSE;
}
/* Fetch the base */
if (!Soft386FetchByte(State, &Base))
{
/* Exception occurred */
return FALSE;
}
/* Check if the base is zero */
if (Base == 0)
{
/* Divide error */
Soft386Exception(State, SOFT386_EXCEPTION_DE);
return FALSE;
}
/* Adjust */
State->GeneralRegs[SOFT386_REG_EAX].HighByte = Value / Base;
State->GeneralRegs[SOFT386_REG_EAX].LowByte = Value %= Base;
/* Update flags */
State->Flags.Zf = (Value == 0) ? TRUE : FALSE;
State->Flags.Sf = (Value & SIGN_FLAG_BYTE) ? TRUE : FALSE;
State->Flags.Pf = Soft386CalculateParity(Value);
return TRUE;
}
SOFT386_OPCODE_HANDLER(Soft386OpcodeAad)
{
// TODO: NOT IMPLEMENTED
UNIMPLEMENTED;
UCHAR Base;
UCHAR Value = State->GeneralRegs[SOFT386_REG_EAX].LowByte;
return FALSE;
if (State->PrefixFlags & SOFT386_PREFIX_LOCK)
{
/* Invalid prefix */
Soft386Exception(State, SOFT386_EXCEPTION_UD);
return FALSE;
}
/* Fetch the base */
if (!Soft386FetchByte(State, &Base))
{
/* Exception occurred */
return FALSE;
}
/* Adjust */
Value += State->GeneralRegs[SOFT386_REG_EAX].HighByte * Base;
State->GeneralRegs[SOFT386_REG_EAX].LowByte = Value;
/* Update flags */
State->Flags.Zf = (Value == 0) ? TRUE : FALSE;
State->Flags.Sf = (Value & SIGN_FLAG_BYTE) ? TRUE : FALSE;
State->Flags.Pf = Soft386CalculateParity(Value);
return TRUE;
}
SOFT386_OPCODE_HANDLER(Soft386OpcodeXlat)