JCXZ performs a short jump (with maximum range 128 bytes) if and
only if the contents of the CX register is 0. JECXZ does the
same thing, but with ECX.
jecxz
386 and laterJump if ECX register is 0
jecxz imm8 {near|short}No example here: this instruction either stops the program, or belongs to a mode this emulator does not run.
Forms
Every form of jecxz the assembler accepts, from NASM's own instruction table.
The second column is the processor that introduced the form; a badge marks a form that needs
an extension, that is lockable, or that long mode dropped.
| Form | Since | Notes |
|---|---|---|
| jecxz imm8 {near|short} | 386 |