Intel ITANIUM ARCHITECTURE - SOFTWARE DEVELOPERS MANUAL VOLUME 1 REV 2.3 Manual page 1362
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CLD—Clear Direction Flag
Opcode
FC
Description
Clears the DF flag in the EFLAGS register. When the DF flag is set to 0, string operations
increment the index registers (ESI and/or EDI).
Operation
DF 0;
Flags Affected
The DF flag is cleared to 0. The CF, OF, ZF, SF, AF, and PF flags are unaffected.
Exceptions (All Operating Modes)
None.
4:60
Instruction
CLD
Description
Clear DF flag
Volume 4: Base IA-32 Instruction Reference
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