AMD Am186 Series, Instruction Set

Page: 197 / 320

Instruction Set 4-157
MOVS MOVS
Operation It Performs
Flag Settings After Instruction
if (size( destination) == 8)
/* copy bytes */
{
ES:[DI] = DS:[SI];
if (DF == 0) /* forward */
increment = 1;
else /* backward */
increment = -1;
}
if (size( destination) == 16)
/* copy words */
{
ES:[DI] = DS:[SI];
if (DF == 0) /* forward */
increment = 2;
else /* backward */
increment = -2;
}
/* point to next string component */
DI = DI + increment;
SI = SI + increment;
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Processor Status
Flags Register
reserved
OF DF IF TF SF ZF AF PF CF
? = undefined; – = unchanged
– – – – – – res – res – res –