WHILE OPERATOR: "INTEL" EXAMPLES

On this page you can see the results of WHILE operator's realization in Intel code. You may need to look additionally for some details about conditions coding.

1. WHILE x<5 DO {cycle's body}; (4FE - address of variable x)

Address, code	Operations	Pascal comments
286 A1 FE 04	mov ax,[4FE]	Extract x
289 B9 05 00 28C 39 C8	mov cx,5 cmp ax,cx	Is x < 5 ?
28E 7D0D	jge 29D (if >=0)	Exit if FALSE
290 ... 29A	{cycle's body}
29B EB E9	jmp 286	To repeat cycle
29D

2. WHILE b DO {cycle's body}; (4FF - address of BOOLEAN variable b)

Address, code	Operations	Pascal comments
286 A0 FF 04 289 30 E4	mov al,[4FF] xor ah,ah (0 ==> ah)	Extract b (byte value)
28B B9 00 00 28E 39 C8	mov cx,0 cmp ax,cx	Is b <> 0 (TRUE)?
290 740D	jz 29F (if =0)	Exit if FALSE
291 ... 29C	{cycle's body}
29D EB E7	jmp 286	To repeat cycle
29F