paiza.ioでaarch64アセンブラ その6

概要

paiza.ioでaarch64アセンブラやってみる。
アセンブラ、やってみた。
fizzbuzz、やってみた。

サンプルコード

use std::fs;
use std::io::{Write, BufWriter};
use std::process::Command;

fn main() {
	let b = "
.global	main
.text
.align	2

mod:
	sdiv 	x2, x0, x1
	msub	x0, x2, x1, x0
	ret

main:
	stp		x20, x30, [sp, -16]!
	str		x21, [sp, -16]!
	mov		x20, xzr
	add		x20, x20, 1
1:
	cmp		x20, 101
	bge		99f
	mov		w21, wzr
	mov		x0, x20
	mov		x1, 3
	bl		mod
	cbnz	x0, 5f
	ldr		x0, =fizz
	bl		printf
	add		w21, w21, 1
5:
	mov		x0, x20
	mov		x1, 5
	bl		mod
	cbnz	x0, 10f
	ldr		x0, =buzz
	bl		printf
	add		w21, w21, 1
10:
	cbz 	w21, 20f
	ldr		x0, =nl
	bl		puts
	b 		80f
20:
	ldr		x0, =fmt
	mov		x1, x20
	bl 		printf
80:
	add		x20, x20, 1
	b 		1b
99:
	ldr		x21, [sp], 16
	ldp		x20, x30, [sp], 16
	mov		w0, wzr
	ret

.data
	fizz:	.asciz  \"Fizz\"
	buzz:	.asciz	\"Buzz\"
	nl:		.asciz	\"\"
	fmt:	.asciz	\"%ld\\n\"

";
	let mut f = BufWriter::new(fs::File::create("test.s").unwrap()); 
	f.write(b.as_bytes()).unwrap();
	f.flush();

	let output0 = Command::new("gcc").args(&["-no-pie", "test.s"]).output().expect("failed to execute process");
	let hello0 = output0.stderr;
	println!("{}", std::str::from_utf8(&hello0).unwrap());

	let output = Command::new("./a.out").output().expect("failed to execute process");
	let hello = output.stdout;
	println!("{}", std::str::from_utf8(&hello).unwrap());
}

投入したソース

.global	main
.text
.align	2

mod:
	sdiv 	x2, x0, x1
	msub	x0, x2, x1, x0
	ret

main:
	stp		x20, x30, [sp, -16]!
	str		x21, [sp, -16]!
	mov		x20, xzr
	add		x20, x20, 1
1:
	cmp		x20, 101
	bge		99f
	mov		w21, wzr
	mov		x0, x20
	mov		x1, 3
	bl		mod
	cbnz	x0, 5f
	ldr		x0, =fizz
	bl		printf
	add		w21, w21, 1
5:
	mov		x0, x20
	mov		x1, 5
	bl		mod
	cbnz	x0, 10f
	ldr		x0, =buzz
	bl		printf
	add		w21, w21, 1
10:
	cbz 	w21, 20f
	ldr		x0, =nl
	bl		puts
	b 		80f
20:
	ldr		x0, =fmt
	mov		x1, x20
	bl 		printf
80:
	add		x20, x20, 1
	b 		1b
99:
	ldr		x21, [sp], 16
	ldp		x20, x30, [sp], 16
	mov		w0, wzr
	ret

.data
	fizz:	.asciz  "Fizz"
	buzz:	.asciz	"Buzz"
	nl:		.asciz	""
	fmt:	.asciz	"%ld\n"

実行結果

1
2
Fizz
4
Buzz
Fizz
7
8
Fizz
Buzz
11
Fizz
13
14
FizzBuzz
16
17
Fizz
19
Buzz
Fizz
22
23
Fizz
Buzz
26
Fizz
28
29
FizzBuzz
31
32
Fizz
34
Buzz
Fizz
37
38
Fizz
Buzz
41
Fizz
43
44
FizzBuzz
46
47
Fizz
49
Buzz
Fizz
52
53
Fizz
Buzz
56
Fizz
58
59
FizzBuzz
61
62
Fizz
64
Buzz
Fizz
67
68
Fizz
Buzz
71
Fizz
73
74
FizzBuzz
76
77
Fizz
79
Buzz
Fizz
82
83
Fizz
Buzz
86
Fizz
88
89
FizzBuzz
91
92
Fizz
94
Buzz
Fizz
97
98
Fizz
Buzz

成果物

以上。