Description

The jz instruction is a conditional jump that follows a test.
It jumps to the specified location if the Zero Flag (ZF) is set (1).
jz is commonly used to explicitly test for something being equal to zero whereas je is commonly found after a cmp instruction.

Syntax

jz location
je location

test eax, eax            ; test if eax=0
jz   short loc_402B13    ; if condition is met, jump to loc_402B13

dec  ecx
jz   counter_is_now_zero

cmp  edx, 42
je   short loc_402B13    ; if edx equals 42, jum to loc_402B13