bits 64

    SECTION .data
; holds 64-bit addresses of all jump target
jumptable: dq switch.c1, switch.c2, switch.c3

    SECTION .text
global _start
_start:
    %include "header.asm.inc"

        ; switch example
        mov rax, 1
switch:        
        cmp rax, 3
        jg .def

        jmp [jumptable + rax*8]

.def:   mov rbx, 0  ; default case
        jmp fin

.c1:    mov rbx, 1  ; case 1
        jmp fin
.c2:    mov rbx, 2  ; case 2
        jmp fin
.c3:    mov rbx, 3  ; case 3
        jmp fin

        ; end of switch
fin:    nop
    

    %include "sysexit.asm.inc"