source: liacs/coco/assignment4/debug.s@ 144

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1## Output generated by ./comp @ ubuntu8041
2## Wed Nov 19 17:50:55 2008
3
4## Compiler Construction Course - Leiden University - LIACS
5## Johan IJsveld - Rick van der Zwet
6## BSD Licenced
7
8 .data # Global data section
9 .align 4
10__x:
11 .word 0
12__y:
13 .word 0
14
15 .text # Code section
16 .align 4
17 .globl main
18
19 .ent main
20main:
21 addi $sp, $sp, -4
22 jal __example # Jump to program body
23 addi $v0, $0, 10 # Exit system call
24 syscall
25 .end main
26
27 .ent __example
28__example:
29 sw $ra, 0($sp) # Set up stack frame
30 sw $fp, -4($sp)
31 move $fp, $sp
32 addi $sp, $sp, -12
33 jal __readinteger
34 lw $t0, 0($fp) # Load integer Register
35 move $t0, $v0
36 lw $t1, __x # Load integer Register
37 move $t1, $t0
38 sw $t0, 0($fp) # Write back integer register
39 sw $t1, __x # Write back integer register
40 jal __readinteger
41 lw $t0, 0($fp) # Load integer Register
42 move $t0, $v0
43 lw $t1, __y # Load integer Register
44 move $t1, $t0
45 move $v1, $t1
46 sw $v1, 0($sp)
47 addi $sp, $sp, -4
48 lw $t2, __x # Load integer Register
49 move $v1, $t2
50 sw $v1, 0($sp)
51 addi $sp, $sp, -4
52 sw $t0, 0($fp) # Write back integer register
53 sw $t1, __y # Write back integer register
54 sw $t2, __x # Write back integer register
55 jal __gcd
56 lw $t0, 0($fp) # Load integer Register
57 move $t0, $v0
58 move $v1, $t0
59 sw $v1, 0($sp)
60 addi $sp, $sp, -4
61 sw $t0, 0($fp) # Write back integer register
62 jal __writeinteger
63 lw $ra, 0($fp) # Return from call
64 lw $fp, -4($fp)
65 addi $sp, $sp, 12
66 jr $ra
67 .end __example
68
69 .ent __gcd
70__gcd:
71 sw $ra, 0($sp) # Set up stack frame
72 sw $fp, -4($sp)
73 move $fp, $sp
74 addi $sp, $sp, -36
75 lw $t0, -4($fp) # Load integer Register
76 addi $a0, $0, 0
77 bne $a0, $t0, _L1 # Branch Instruction Int
78 lw $t1, -8($fp) # Load integer Register
79 lw $t2, 0($fp) # Load integer Register
80 move $t1, $t2
81 j _L0
82_L1:
83 lw $t3, -16($fp) # Load integer Register
84 mul $t3, $t2, $t0 # Binary Arithmetic
85 move $v1, $t3
86 sw $v1, 0($sp)
87 addi $sp, $sp, -4
88 move $v1, $t0
89 sw $v1, 0($sp)
90 addi $sp, $sp, -4
91 sw $t0, -4($fp) # Write back integer register
92 sw $t1, -8($fp) # Write back integer register
93 sw $t2, 0($fp) # Write back integer register
94 sw $t3, -16($fp) # Write back integer register
95 jal __gcd
96 lw $t0, -20($fp) # Load integer Register
97 move $t0, $v0
98 lw $t1, -8($fp) # Load integer Register
99 move $t1, $t0
100_L0:
101 sw $t0, -20($fp) # Write back integer register
102 sw $t1, -8($fp) # Write back integer register
103 lw $t0, -8($fp) # Load integer Register
104 move $v0, $t0 # Store integer return value
105 lw $ra, 0($fp) # Return from call
106 lw $fp, -4($fp)
107 addi $sp, $sp, 44
108 jr $ra
109 .end __gcd
110
111 .ent __readinteger # Start of builtin functions and procedures
112__readinteger:
113 addi $v0, $0, 5
114 syscall
115 addi $sp, $sp, 4
116 jr $ra
117 .end __readinteger
118
119 .ent __writeinteger
120__writeinteger:
121 lw $a0, 4($sp)
122 addi $v0, $0, 1
123 syscall
124 addi $sp, $sp, 4
125 jr $ra
126 .end __writeinteger
127
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