-
Notifications
You must be signed in to change notification settings - Fork 0
/
figure.asm
320 lines (257 loc) · 6.17 KB
/
figure.asm
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
# MAIN
add $s7, $0, $0
addi $sp, $0, 8191
addi $a0, $0, 30 #head
addi $a1, $0, 100
addi $a2, $0, 20
jal circle
addi $a0, $0, 30 #body
addi $a1, $0, 80
addi $a2, $0, 30
addi $a3, $0, 30
jal line
addi $a0, $0, 20 #left leg
addi $a1, $0, 1
addi $a2, $0, 30
addi $a3, $0, 30
jal line
addi $a0, $0, 40 #right leg
addi $a1, $0, 1
addi $a2, $0, 30
addi $a3, $0, 30
jal line
addi $a0, $0, 15 #left arm
addi $a1, $0, 60
addi $a2, $0, 30
addi $a3, $0, 50
jal line
addi $a0, $0, 30 #right arm
addi $a1, $0, 50
addi $a2, $0, 45
addi $a3, $0, 60
jal line
addi $a0, $0, 24 #left eye
addi $a1, $0, 105
addi $a2, $0, 3
jal circle
addi $a0, $0, 36 #right eye
addi $a1, $0, 105
addi $a2, $0, 3
jal circle
addi $a0, $0, 25 #mouth center
addi $a1, $0, 90
addi $a2, $0, 35
addi $a3, $0, 90
jal line
addi $a0, $0, 25 #mouth left
addi $a1, $0, 90
addi $a2, $0, 20
addi $a3, $0, 95
jal line
addi $a0, $0, 35 #mouth right
addi $a1, $0, 90
addi $a2, $0, 40
addi $a3, $0, 95
jal line
j end
#####################################################################################
#Circle algorithms in MIPS assember
#parameters: xc, yc, r
#xc = x center, yc = y center, r = radius
#circle expects 3 arguments (arguments explained above):
#$a0 = xc
#$a1 = yc
#$a2 = r
#$s0 = xc
#$s1 = yc
#$s2 = x
#$s3 = y
#$s4 = g
#$s5 = diagonalInc
#$s6 = rightInc
#$t0 = temp
#$s7 = next address to plot to
#main is the last function in the program, so the program will exit when it completes.
j main
circle:
#save previous registers
addi $sp, $sp, -32
sw $s0, 0($sp)
sw $s1, 4($sp)
sw $s2, 8($sp)
sw $s3, 12($sp)
sw $s4, 16($sp)
sw $s5, 20($sp)
sw $s6, 24($sp)
sw $ra, 28($sp)
#initialize our registers
#x = 0, y = r
addi $s2, $0, 0 ##line 10
addi $s3, $a2, 0
#g = 3 - 2*r
add $s4, $a2, $a2
#premultiply for diagonalInc
add $s5, $s4, $s4
#continue with g
addi $t0, $0, 3
sub $s4, $t0, $s4
#diagonalInc
addi $t0, $0, 10
sub $s5, $t0, $s5
#rightInc
addi $s6, $0, 6
#xc and yc
addi $s0, $a0, 0
addi $s1, $a1, 0 ##line 20
#x Lessthan or EQualto y, which is the same as !(x>y)
xleqy: slt $t0, $s3, $s2
bne $t0, $0, xend
#the plots
add $a0, $s0, $s2
add $a1, $s1, $s3
jal plot
sub $a1, $s1, $s3
jal plot
sub $a0, $s0, $s2
add $a1, $s1, $s3
jal plot ##line 30
sub $a1, $s1, $s3
jal plot
add $a0, $s0, $s3
add $a1, $s1, $s2
jal plot
sub $a1, $s1, $s2
jal plot
sub $a0, $s0, $s3
add $a1, $s1, $s2
jal plot ##line 40
sub $a1, $s1, $s2
jal plot
##if g >= 0## (g not < 0)
slt $t0, $s4, $0
bne $t0, $0, gltz
##g+= diagonalInc##
add $s4, $s4, $s5 ##line 45
##diagonalInc+=8##
addi $s5, $s5, 8
##y-=1##
addi $s3, $s3, -1
j gend
##else##
gltz: add $s4, $s4, $s6
addi $s5, $s5, 4##line 50
#end of if(g>=0) block
gend: addi $s6, $s6, 4
addi $s2, $s2, 1
j xleqy
#end of x<=y loop
xend:
#end: restore registers
lw $s0, 0($sp)
lw $s1, 4($sp)
lw $s2, 8($sp)
lw $s3, 12($sp)
lw $s4, 16($sp)
lw $s5, 20($sp)
lw $s6, 24($sp)
lw $ra, 28($sp)
addi $sp, $sp, 32
jr $ra
plot:
sw $a0, 0($s7)
sw $a1, 4($s7)
addi $s7, $s7, 8
jr $ra
main: addi $s7, $0, 0
addi $sp, $0, 8192
addi $a0, $0, 30
addi $a1, $0, 100
addi $a2, $0, 20
jal circle
#need fake instruction to correctly run
sll $0, $0, 0
#####################################################################################
line: sub $s0, $a3, $a1 # $s0 holds y1 - y0
sub $s1, $a2, $a0 # $s1 holds x1 - x0
###### Computing abs value of y1 - y0 ######
add $t0, $s0, $0 # copies $s0 into $t0
slt $t1, $s0, $0 # is $s0 < 0?
beq $t1, $0, ypos # branch if positive
sub $t0, $0, $s0 # 0 - $s0 if negative
ypos: add $s0, $t0, $0 # abs($s0) computed
###### Computing abs value of x1 - x0 ######
add $t0, $s1, $0 # copies $s1 into $t0
slt $t1, $s1, $0 # is $s1 < 0?
beq $t1, $0, xpos # branch if positive
sub $t0, $0, $s1 # 0 - $s1 if negative
xpos: add $s1, $t0, $0 # abs($s1) computed
###### if abs(y1 - y0) > abs(x1 - x0) ######
slt $t0, $s1, $s0 # is $s1 < $s0
add $s2, $0, $0 # $s2 is st, $s2 = 0
beq $t0, $0, else0 # branch if else case
addi $s2, $0, 1 # $s2 = 1 if we fall through
###### if st == 1 and swapping ######
else0: addi $t0, $0, 1 # $t0 = 1
bne $s2, $t0, else1 # do not swap
add $t0, $a0, $0 # $t0 = $a0
add $a0, $a1, $0 # $a0 = $a1
add $a1, $t0, $0 # $a1 = $t0
add $t0, $a2, $0 # $t0 = $a2
add $a2, $a3, $0 # $a2 = $a3
add $a3, $t0, $0 # $a3 = $t0
###### if x0 > x1 and swapping #######
else1: slt $t0, $a2, $a0 # is x0 > x1?
beq $t0, $0, else2 # do not swap
add $t0, $a0, $0 # $t0 = $a0
add $a0, $a2, $0 # $a0 = $a2
add $a2, $t0, $0 # $a2 = $t0
add $t0, $a1, $0 # $t0 = $a1
add $a1, $a3, $0 # $a1 = $a3
add $a3, $t0, $0 # $a3 = $t0
else2: sub $s0, $a2, $a0 # $s0 = deltax = x1 - x0
sub $s1, $a3, $a1 # $s1 = y1 - y0
###### Computing abs value for deltay ######
add $t0, $s1, $0 # copies $s1 into $t0
slt $t1, $s1, $0 # is $s1 < 0?
beq $t1, $0, ypos2 # branch if positive
sub $t0, $0, $s1 # 0 - $s0 if negative
ypos2: add $s1, $t0, $0 # $s1 = deltay = abs(y1 - y0)
add $s3, $0, $0 # $s3 = error = 0
add $s4, $a1, $0 # $s4 = y = y0
###### if y0 < y1 ######
slt $t0, $a1, $a3 # is $a1 < $a3 (y0 < y1)
addi $s5, $0, 1 # $s5 = ystep = 1
bne $t0, $0, else3 # branch if y0 < y1 (skip else)
addi $s5, $0, -1 # $s5 = ystep = -1
###### For loop ######
else3: add $s6, $a0, $0 # $s6 = x = x0
addi $t7, $a2, 1 # $t7 = x1 + 1
# s0 = deltax
# s1 = deltay
# s2 = st
# s3 = error
# s4 = y
# s5 = ystep
# s6 = x
for1: beq $s6, $t7, end4 # end for loop if equal (x0 to x1 inclusive)
addi $t0, $0, 1 # $t0 = 1
bne $s2, $t0, else4 # if $s2 == 1 (if st == 1)
sw $s4, 0($s7) # plotting y
sw $s6, 4($s7) # plotting x
addi $s7, $s7, 8 # incrementing data mem loc
j yx # don't fall through
else4: sw $s6, 0($s7) # plotting x
sw $s4, 4($s7) # plotting y
addi $s7, $s7, 8 # incrementing data mem loc
yx: add $s3, $s3, $s1 # error = error + deltay
sll $t1, $s3, 1 # $t1 = 2*error
addi $t2, $s0, -1 # $t2 = deltax - 1
slt $t3, $t2, $t1 # is $t2 < $t1 (deltax - 1 < 2*error)
beq $t3, $0, else5 # branch if deltax - 1 > 2*error
add $s4, $s4, $s5 # y = y + ystep
sub $s3, $s3, $s0 # error = error - deltax
else5: addi $s6, $s6, 1 # increment $s6 (x) for for loop
j for1 # for loop
end4: jr $ra
end: add $0, $0, $0
add $0, $0, $0