; ASM implementation of a do-while loop
;
; do {
;     body
; } while (condition)
;

; include directives
global asm_main
%include "../lib/asm_io.inc"

segment .data
    ; DX directives (read only, static data)

segment .bss
    ; RESX directives (writable data)

segment .text
asm_main:                   ; entry point (called from driver.c)
    ; instructions

    enter 0,0               ; Initialize register EBP
    pusha                   ; Push register contents to the stack
    ;

    mov   ecx, 100          ; set test value

    ; start of do loop
do:

    ;body of loop
    sub   ecx, 10           ; will set a ZF at 0
    dump_regs 0             ; view flags
    jnz   do                ; continue loop if ZF is NOT set

    ;
    popa                    ; Restore register data from the stack
    mov   eax, 0            ; flush EAX of data
    leave                   ; restore the stack
    ret                     ; Return from main back into C library wrapper