Compares value at ES:DI (even if operand is specified) from the accumulator and sets the flags similar to a subtraction.
DI is incremented/decremented based on the instruction format (or operand size) and the state of the Direction Flag.
Use with REP prefixes.
Usage:
SCAS string SCASB SCASW SCASD ; 386+ only
Modifies flags:
AF CF OF PF SF ZF
| Clocks | Size | |||||
|---|---|---|---|---|---|---|
| Operands | 808x | 286 | 386 | 486 | Bytes | |
| string | 15 | 7 | 7 | 6 | 1 | (W88=19) |