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Vol. 2A 3-65
INSTRUCTION SET REFERENCE, A-M
ARPL—Adjust RPL Field of Segment Selector
ELSE
ZF ← 0;
FI;
FI;
Flags Affected
The ZF flag is set to 1 if the RPL field of the destination operand is less than that of
the source operand; otherwise, it is set to 0.
Protected Mode Exceptions
#GP(0) If the destination is located in a non-writable segment.
If a memory operand effective address is outside the CS, DS,
ES, FS, or GS segment limit.
If the DS, ES, FS, or GS register is used to access memory and it
contains a NULL segment selector.
#SS(0) If a memory operand effective address is outside the SS
segment limit.
#PF(fault-code) If a page fault occurs.
#AC(0) If alignment checking is enabled and an unaligned memory
reference is made while the current privilege level is 3.
#UD If the LOCK prefix is used.
Real-Address Mode Exceptions
#UD The ARPL instruction is not recognized in real-address mode.
If the LOCK prefix is used.
Virtual-8086 Mode Exceptions
#UD The ARPL instruction is not recognized in virtual-8086 mode.
If the LOCK prefix is used.
Compatibility Mode Exceptions
Same exceptions as in protected mode.
64-Bit Mode Exceptions
Not applicable.