Intel 253666-024US - Manual (Page 603)

Vol. 2A 3-557
INSTRUCTION SET REFERENCE, A-M
LOOP/LOOPcc—Loop According to ECX Counter
Protected Mode Exceptions
#GP(0) If the offset being jumped to is beyond the limits of the CS
segment.
#UD If the LOCK prefix is used.
Real-Address Mode Exceptions
#GP If the offset being jumped to is beyond the limits of the CS
segment or is outside of the effective address space from 0 to
FFFFH. This condition can occur if a 32-bit address size override
prefix is used.
#UD If the LOCK prefix is used.
Virtual-8086 Mode Exceptions
Same exceptions as in real address mode.
Compatibility Mode Exceptions
Same exceptions as in protected mode.
64-Bit Mode Exceptions
#GP(0) If the offset being jumped to is in a non-canonical form.
#UD If the LOCK prefix is used.