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  1. section .text
  2. global _start
  3.  
  4. %define		stdin		0
  5. %define		stdout		1
  6. %define		sys_read	3
  7. %define		sys_write	4
  8. %define		sys_exit	1
  9.  
  10. _start:
  11.  
  12. 	mov	eax, sys_read		; read A
  13. 	mov	ebx, stdin
  14. 	mov	ecx, _abuff
  15. 	mov	edx, 5			; A,B <= 200 (so we need 3 bytes + 1 for LF = 4)
  16. 	int	80h
  17.  
  18. 		pushfd
  19. 		push	eax
  20. 		push	ebx
  21. 		push	ecx
  22. 		push	edx
  23. 		push	esi
  24.  
  25. 		xor	esi, esi
  26. 		xor	ebx, ebx
  27. 		mov	bl, 10
  28.  
  29. ._a_sti:
  30. 		xor	ax, ax
  31. 		mov	al, [_abuff+esi]
  32. 		cmp	al, 10
  33. 		je	._a_end
  34.  
  35. 		inc	esi
  36. 		sub	al, "0"
  37. 		mov	cl, al
  38.  
  39. 		mov	al, [_a]
  40. 		mul	bl
  41. 		add	al, cl
  42. 		mov	[_a], al
  43.  
  44. 		jmp	._a_sti
  45.  
  46. ._a_end:
  47.  
  48. 		pop	esi
  49. 		pop	edx
  50. 		pop	ecx
  51. 		pop	ebx
  52. 		pop	eax
  53. 		popfd
  54.  
  55.  
  56. 	mov	eax, sys_read		; read B
  57. 	mov	ebx, stdin
  58. 	mov	ecx, _bbuff
  59. 	mov	edx, 5
  60. 	int	80h
  61.  
  62. 		pushfd
  63. 		push	eax
  64. 		push	ebx
  65. 		push	ecx
  66. 		push	edx
  67. 		push	esi
  68.  
  69. 		xor	esi, esi
  70. 		xor	ebx, ebx
  71. 		mov	bl, 10
  72.  
  73. ._b_sti:
  74. 		xor	ax, ax
  75. 		mov	al, [_bbuff+esi]
  76. 		cmp	al, 10
  77. 		je	._b_end
  78.  
  79. 		inc	esi
  80. 		sub	al, "0"
  81. 		mov	cl, al
  82.  
  83. 		mov	al, [_b]
  84. 		mul	bl
  85. 		add	al, cl
  86. 		mov	[_b], al
  87.  
  88. 		jmp	._b_sti
  89.  
  90. ._b_end:
  91.  
  92. 		pop	esi
  93. 		pop	edx
  94. 		pop	ecx
  95. 		pop	ebx
  96. 		pop	eax
  97. 		popfd
  98.  
  99.  
  100. 	xor	ax, ax			; 0 to register
  101. 	xor	bx, bx			; 0 to register
  102. 	mov	al, [_a]
  103. 	mov	bl, [_b]
  104. 	add	ax, bx			; ax = A + B
  105.  
  106. 	call	_pr_ax
  107. 	call	_pr_lf
  108.  
  109. 	mov	eax, sys_exit		; sys_exit
  110. 	mov	ebx, 0			; exit code
  111. 	int	80h
  112.  
  113. _pr_ax:
  114. 	pushfd
  115. 	push	eax
  116. 	push	ebx
  117. 	push	edx
  118. 	push	esi
  119.  
  120. 	xor	esi, esi
  121. 	mov	bx, 10		; przez 10 będziemy dzielić
  122.  
  123. ._div_more:
  124. 	xor	dx, dx
  125. 	div	bx
  126. 	add	dl, "0"			; add "0"
  127. 	mov	[_rbuff+esi], dl
  128. 	inc	esi
  129. 	xor	dl, dl
  130. 	cmp	ax, dx
  131. 	jne	._div_more
  132.  
  133. 	xor	ecx, ecx
  134.  
  135. ._reverse:
  136. 	dec	esi
  137. 	mov	al, [_rbuff+esi]
  138. 	mov	[_prbuff+ecx], al
  139. 	inc	ecx
  140. 	cmp	esi, 0
  141. 	jnz	._reverse
  142.  
  143. 	mov	esi, ecx
  144.  
  145. 	mov	eax, sys_write
  146. 	mov	ebx, stdout
  147. 	mov	ecx, _prbuff
  148. 	mov	edx, esi
  149. 	int	80h
  150.  
  151. 	pop	esi
  152. 	pop	edx
  153. 	pop	ebx
  154. 	pop	eax
  155. 	popfd
  156.  
  157. 	ret
  158.  
  159. _pr_lf:
  160. 	pushfd
  161. 	push	eax
  162. 	push	edi
  163. 	push	esi
  164. 	push	edx
  165.  
  166. 	mov	eax, sys_write
  167. 	mov	ebx, stdout
  168. 	mov	ecx, _lf
  169. 	mov	edx, 1
  170. 	int	80h
  171.  
  172. 	pop	edx
  173. 	pop	esi
  174. 	pop	edi
  175. 	pop	eax
  176. 	popfd
  177.  
  178. 	ret
  179.  
  180. section .data
  181. 	_abuff		times	5	db	0
  182. 	_bbuff		times	5	db	0
  183. 	_rbuff		times	4	db	0
  184. 	_prbuff		times	4	db	0
  185. 	_lf	db	10
  186. 	_a	db	0
  187. 	_b	db	0
  188. 	_len	db	0
  189.  
Success #stdin #stdout 0.02s 144KB
comments (?)
stdin 
3
4
stdout 
179
https://ideone.com/AtQga
language:
Assembler 32bit (nasm 2.14)
created:
14 years ago
visibility:
public

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