Submission #54766528

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bits 64
section .note.GNU-stack
section .text
; int read_char(void)
; 1文字(バイト)読み込み、文字コードを返す
read_char:
  xor eax, eax
  xor edi, edi
  lea rsi, [rsp - 8]
  mov edx, 1
  syscall
  cmp eax, 1
  jne read_char_error
  mov al, [rsp - 8]
  ret
read_char_error:
  mov eax, -1
  ret
 
 
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bits 64

section .note.GNU-stack
section .text

; int read_char(void)
; 1文字(バイト)読み込み、文字コードを返す
read_char:
	xor eax, eax
	xor edi, edi
	lea rsi, [rsp - 8]
	mov edx, 1
	syscall
	cmp eax, 1
	jne read_char_error
	mov al, [rsp - 8]
	ret
read_char_error:
	mov eax, -1
	ret

; void print_char(int c)
; 1文字(バイト)出力する
print_char:
	mov [rsp - 8], edi
	mov eax, 1
	mov edi, eax
	lea rsi, [rsp - 8]
	mov edx, eax
	syscall
	ret

; int read_int(void)
; 十進数の非負整数を1個読み込む
read_int:
	push rbp
	mov rbp, rsp
	sub rsp, 16
	mov [rbp - 8], ebx
	xor ebx, ebx
read_int_loop:
	call read_char
	cmp eax, '0'
	jl read_int_end
	cmp eax, '9'
	jg read_int_end
	imul ebx, ebx, 10
	sub eax, '0'
	add ebx, eax
	jmp read_int_loop
read_int_end:
	mov eax, ebx
	mov ebx, [rbp - 8]
	leave
	ret

; void print_int(int value)
; 非負整数を十進数で出力する
print_int:
	mov eax, edi
	mov rsi, rsp
	mov ecx, 10
print_int_convert_loop:
	cdq
	idiv ecx
	add dl, '0'
	dec rsi
	mov [rsi], dl
	test eax, eax
	jnz print_int_convert_loop
	mov eax, 1
	mov edi, eax
	mov rdx, rsp
	sub rdx, rsi
	syscall
	ret

global main
main:
	push rbp
	mov rbp, rsp
	sub rsp, 16
	; 3個の数値の和を出力する
	call read_int
	mov [rbp - 8], eax
	call read_int
	add [rbp - 8], eax
	call read_int
	add eax, [rbp - 8]
	mov edi, eax
	call print_int
	; 区切りとなる空白を出力する
	mov edi, ' '
	call print_char
	; 文字列を1行出力する
main_loop:
	call read_char
	mov [rbp - 16], al
	mov edi, eax
	call print_char
	cmp byte [rbp - 16], `\n`
	jne main_loop
	; 終了する
	mov eax, 60
	xor edi, edi
	syscall

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