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3-532 Vol. 2A LDS/LES/LFS/LGS/LSS—Load Far Pointer
INSTRUCTION SET REFERENCE, A-M
FI;
DEST ← Offset(SRC);
Real-Address or Virtual-8086 Mode
SegmentRegister ← SegmentSelector(SRC); FI;
DEST ← Offset(SRC);
Flags Affected
None.
Protected Mode Exceptions
#UD If source operand is not a memory location.
If the LOCK prefix is used.
#GP(0) If a NULL selector is loaded into the SS register.
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.
#GP(selector) If the SS register is being loaded and any of the following is true:
the segment selector index is not within the descriptor table
limits, the segment selector RPL is not equal to CPL, the
segment is a non-writable data segment, or DPL is not equal to
CPL.
If the DS, ES, FS, or GS register is being loaded with a non-NULL
segment selector and any of the following is true: the segment
selector index is not within descriptor table limits, the segment
is neither a data nor a readable code segment, or the segment is
a data or nonconforming-code segment and both RPL and CPL
are greater than DPL.
#SS(0) If a memory operand effective address is outside the SS
segment limit.
#SS(selector) If the SS register is being loaded and the segment is marked not
present.
#NP(selector) If DS, ES, FS, or GS register is being loaded with a non-NULL
segment selector and the segment is marked not present.
#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.
Real-Address Mode Exceptions
#GP If a memory operand effective address is outside the CS, DS,
ES, FS, or GS segment limit.