mirror of
https://github.com/reactos/reactos.git
synced 2024-10-15 05:37:44 +00:00
[SOFT386]
Implement the AAM and AAD instructions. svn path=/branches/ntvdm/; revision=60342
This commit is contained in:
parent
b5a9d7490a
commit
442b56b45b
|
@ -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;
|
||||
|
||||
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;
|
||||
|
||||
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)
|
||||
|
|
Loading…
Reference in a new issue