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Copyright 1991 David Jurgens |
SCAS - Scan String (Byte, Word or Doubleword)
Usage: SCAS string
SCASB
SCASW
SCASD (386+ only)
Modifies flags: AF CF OF PF SF ZF
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.
Clocks Size
Operands 808x 286 386 486 Bytes
string 15 7 7 6 1 (W88=19)
- see Instruction Timing
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scas |
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