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中古ノート、買ってみた。 その112

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概要

中古ノート買ってみた。
wsl1のubuntu18.04にnasm入れてみた。
練習問題、やってみた。

練習問題

九九を表示せよ。

実行結果

# gcc -o kuku kuku.s -no-pie

# ./kuku
1 2 3 4 5 6 7 8 9
2 4 6 8 10 12 14 16 18
3 6 9 12 15 18 21 24 27
4 8 12 16 20 24 28 32 36
5 10 15 20 25 30 35 40 45
6 12 18 24 30 36 42 48 54
7 14 21 28 35 42 49 56 63
8 16 24 32 40 48 56 64 72
9 18 27 36 45 54 63 72 81

サンプルコード

.intel_syntax noprefix
.global main
.text

main:
	push	rbp
	mov		rbp, rsp
_start:
	mov 	r15, 0
	mov 	r14, 1
_loop:
	inc 	r15
	mov		eax, r14d
	mov		ecx, r15d
	mul		ecx
	mov		esi, eax
	mov		rdi, OFFSET FLAT:fmt
	mov		rax, 0
	call	printf
	cmp		r15, 9
	jne		_loop
	inc		r14
	mov		esi, eax
	mov		rdi, OFFSET FLAT:fmtn
	mov		rax, 0
	call	printf
	mov		r15, 0
	cmp		r14, 10
	jne		_loop
_end:
	mov		eax, 0
	leave
	ret

.data
	fmt:	.string "%d "
	fmtn:	.string "\n"




以上。

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