1 .section .rodata
2 fmt:	.asciz "Hello World\n"
3 ifmt:	.asciz "%d\n"
4 
5 .section .data
6 arr: .dword 1, 2, 3, 4, 5
7 
8 .section .text
9 .global main
10 main:
11 	addi sp, sp, -16
12 	sd s0, 8(sp)
13 	sd ra, 0(sp)
14 
15 	jal hello
16 
17 	jal printarr
18 	jal nl
19 
20 	la a0, arr
21 	li a1, 1
22 	jal swap
23 
24 	jal printarr
25 
26 	jal nl
27 
28 	la a0, arr
29 	li a1, 0
30 	jal avg
31 	mv s0, a0
32 	jal print
33 
34 	mv a0, s0
35 	jal even
36 	jal print
37 
38 	mv a0, zero
39 	ld ra, 0(sp)
40 	ld s0, 8(sp)
41 	addi sp, sp, 16
42 	ret
43 
44 // void hello (void);
45 hello:
46 	la a0, fmt
47 	j printf
48 
49 // void nl (void);
50 nl:
51 	li a0, 10
52 	j putchar
53 
54 // void print (int);
55 print:
56 	addi sp, sp, -8
57 	sd ra, 0(sp)
58 
59 	mv a1, a0
60 	la a0, ifmt
61 	jal printf
62 	
63 	ld ra, 0(sp)
64 	addi sp, sp, 8
65 	ret
66 
67 // void printarr (void);
68 printarr:
69 	addi sp, sp, -32
70 	sd ra, 16(sp)
71 	sd s0, 8(sp)
72 	sd s1, 0(sp)
73 
74 	la s0, arr
75 	mv s1, zero
76 
77 ploop:
78 	add a0, s0, s1
79 	ld a0, 0(a0)
80 	jal print
81 
82 	addi s1, s1, 8
83 	li t0, (5 * 8)
84 	bne s1, t0, ploop
85 
86 
87 	ld s1, 0(sp)
88 	ld s0, 8(sp)
89 	ld ra, 16(sp)
90 	addi sp, sp, 32
91 	ret
92 
93 // void swap (long *v, size_t n);
94 swap:
95 	slli a1, a1, 3
96 	add t0, a0, a1
97 	ld t1, 0(t0)
98 	ld t2, 8(t0)
99 	sd t2, 0(t0)
100 	sd t1, 8(t0)
101 	ret
102 	
103 // long avg(long *v, size_t n);
104 avg:
105 	slli a1, a1, 3
106 	add a0, a0, a1
107 	ld t0, 0(a0)
108 	ld t1, 8(a0)
109 	add a0, t0, t1
110 	srli a0, a0, 1
111 	ret
112 
113 // bool even(long);
114 even:
115 	andi a0, a0, 1
116 	xor a0, a0, 1
117 	ret