Intel 64 and IA-32 Architectures Software Developers Manual Volume 1, Basic Architecture

5-8 Vol. 1
INSTRUCTION SET SUMMARY
INTO Interrupt on overflow
BOUND Detect value out of range
ENTER High-level procedure entry
LEAVE High-level procedure exit
5.1.8 String Instructions
The string instructions operate on strings of bytes, allowing them to be moved to and
from memory.
MOVS/MOVSB Move string/Move byte string
MOVS/MOVSW Move string/Move word string
MOVS/MOVSD Move string/Move doubleword string
CMPS/CMPSB Compare string/Compare byte string
CMPS/CMPSW Compare string/Compare word string
CMPS/CMPSD Compare string/Compare doubleword string
SCAS/SCASB Scan string/Scan byte string
SCAS/SCASW Scan string/Scan word string
SCAS/SCASD Scan string/Scan doubleword string
LODS/LODSB Load string/Load byte string
LODS/LODSW Load string/Load word string
LODS/LODSD Load string/Load doubleword string
STOS/STOSB Store string/Store byte string
STOS/STOSW Store string/Store word string
STOS/STOSD Store string/Store doubleword string
REP Repeat while ECX not zero
REPE/REPZ Repeat while equal/Repeat while zero
REPNE/REPNZ Repeat while not equal/Repeat while not zero
5.1.9 I/O Instructions
These instructions move data between the processor’s I/O ports and a register or
memory.
IN Read from a port
OUT Write to a port
INS/INSB Input string from port/Input byte string from port
INS/INSW Input string from port/Input word string from port
INS/INSD Input string from port/Input doubleword string from port