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80386 Programmer's Reference Manual -- Opcode CLD

CLD -- Clear Direction Flag

Opcode	Instruction	Clocks	Description	Example
FC	cld	2	Clear direction flag	`cld`

Operation




DF := 0;

Description

CLD clears the direction flag. No other flags or registers are affected. After CLD is executed, string operations will increment the index registers (SI and/or DI) that they use.

Flags Affected

DF := 0

Protected Mode Exceptions

None

Real Address Mode Exceptions

None

Virtual 8086 Mode Exceptions

None

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