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back2root:ibm-pc-ms-dos:instr:jcxz

JCXZ-JECXZ

JCXZ/JECXZ - Jump if Register (E)CX is Zero

Causes execution to branch to “label” if register CX is zero.

Uses unsigned comparaison.

Usage:

	JCXZ	destination	;
	JECXZ	destination	; 386+ only

	Jump ?	Clocks				Size
Operands		808x	286	386	486	Bytes
label	Y	18	8+m	9+m	8	2
label	N	6	4	5	5	2

see Instructions list, Instruction Timing, 8086 Architecture, CPU

2023/01/05 22:53 · frater

back2root/ibm-pc-ms-dos/instr/jcxz.txt · Dernière modification : 2023/03/03 18:06 de frater