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Line No.	Rev	Author	Line
1	2	ja_rd	`################################################################################`
2			`# opcode.s -- MIPS opcode tester for xxx project`
3			`#-------------------------------------------------------------------------------`
4			`# ORIGINAL AUTHOR: Steve Rhoads (rhoadss@yahoo.com) -- 1/10/01`
5			`#`
6			`# This file is an edited version of 'opcodes.asm', which is part of the Plasma`
7			`# project (http://opencores.org/project,plasma).`
8			`# COPYRIGHT: Software placed into the public domain by the original author.`
9			`# Software 'as is' without warranty. Author liable for nothing.`
10			`#-------------------------------------------------------------------------------`
11			`# This assembly file tests all of the opcodes supported by the xxx core.`
12			`# This test assumes that address 0x20000000 is the UART write register.`
13			`# Successful tests will print out "A" or "AB" or "ABC" or ....`
14			`# Missing letters or letters out of order indicate a failure.`
15			`#-------------------------------------------------------------------------------`
16			`# The core supports all the MIPS-I instructions, except for MULT* and DIV*.`
17			`# C code needs to be compiled with the "-mno-mul" flag and linked with 'math.c'.`
18			`# NOTE: the regular gcc compiler (v xxx) does NOT support this option!`
19			`#-------------------------------------------------------------------------------`
20			`# Summary of differences to original code:`
21			`#`
22			`# 1.- MUL* or DIV* are not implemented so that part has been commented out.`
23			`# 2.- Plasma does not need a 'delay slot' after a L* before the result is used,`
24			`# unlike the conventional MIPS-I architecture. In this code NOPs have been`
25			`# inserted where necessary so that it works whether or not the core has load`
26			`# delay slots (as opposed to load interlock). This means that this code`
27			`# can't be used to validate load interlock implementation.`
28			`#`
29			`################################################################################`
30
31
32			`# Set to >0 to test unaligned loads and/or stores`
33			`.set TEST_UNALIGNED_LOADS, 0`
34			`.set TEST_UNALIGNED_STORES, 0`
35
36			`.text`
37			`.align 2`
38			`.globl entry`
39			`.ent entry`
40			`entry:`
41			`.set noreorder`
42
43			`la $gp, _gp #initialize stack pointer`
44			`la $4, __bss_start #$4 = .sbss_start`
45			`la $5, _end #$5 = .bss_end`
46			`nop #no stack needed`
47			`nop`
48
49			`b StartTest`
50			`nop #nops required to place ISR at 0x3c`
51			`nop`
52
53			`OS_AsmPatchValue:`
54			`#Code to place at address 0x3c`
55			`lui $26, 0x1000`
56			`ori $26, $26, 0x3c`
57			`jr $26`
58			`nop`
59
60			`.org 0x3c`
61			`InterruptVector: # Address=0x3c`
62			`mfc0 $26,$14 # C0_EPC=14 (Exception PC)`
63			`jr $26`
64			`add $4,$4,5`
65
66			`StartTest:`
67			`mtc0 $0,$12 # disable interrupts`
68			`lui $20,0x2000 # serial port write address`
69			`ori $21,$0,'\n' # <CR> character`
70			`ori $22,$0,'X' # 'X' letter`
71			`ori $23,$0,'\r'`
72			`ori $24,$0,0x0f80 # temp memory`
73
74			`sb $23,0($20)`
75			`sb $21,0($20)`
76			`sb $23,0($20)`
77			`sb $21,0($20)`
78			`sb $23,0($20)`
79			`sb $21,0($20)`
80			`sb $23,0($20)`
81			`sb $21,0($20)`
82
83			`#Patch interrupt vector to 0x1000003c`
84			`la $5, OS_AsmPatchValue`
85			`sub $6,$5,0x1000`
86			`blez $6,NoPatch`
87			`nop`
88			`#lw $6, 0($5)`
89			`#sw $6, 0x3c($0)`
90			`#lw $6, 4($5)`
91			`#sw $6, 0x40($0)`
92			`#lw $6, 8($5)`
93			`#sw $6, 0x44($0)`
94			`#lw $6, 12($5)`
95			`#sw $6, 0x48($0)`
96			`NoPatch:`
97
98			`######################################`
99			`#Arithmetic Instructions`
100			`######################################`
101			`ArthmeticTest:`
102			`ori $2,$0,'A'`
103			`sb $2,0($20)`
104			`ori $2,$0,'r'`
105			`sb $2,0($20)`
106			`ori $2,$0,'i'`
107			`sb $2,0($20)`
108			`ori $2,$0,'t'`
109			`sb $2,0($20)`
110			`ori $2,$0,'h'`
111			`sb $2,0($20)`
112			`sb $23,0($20)`
113			`sb $21,0($20)`
114
115			`#a: ADD`
116			`ori $2,$0,'a'`
117			`sb $2,0($20)`
118			`ori $3,$0,5`
119			`ori $4,$0,60`
120			`add $2,$3,$4`
121			`sb $2,0($20) #A`
122			`sb $23,0($20)`
123			`sb $21,0($20)`
124
125			`#b: ADDI`
126			`ori $2,$0,'b'`
127			`sb $2,0($20)`
128			`ori $4,$0,60`
129			`addi $2,$4,5`
130			`sb $2,0($20) #A`
131			`sb $23,0($20)`
132			`sb $21,0($20)`
133
134			`#c: ADDIU`
135			`ori $2,$0,'c'`
136			`sb $2,0($20)`
137			`ori $4,$0,50`
138			`addiu $5,$4,15`
139			`sb $5,0($20) #A`
140			`sb $23,0($20)`
141			`sb $21,0($20)`
142
143			`#d: ADDU`
144			`ori $2,$0,'d'`
145			`sb $2,0($20)`
146			`ori $3,$0,5`
147			`ori $4,$0,60`
148			`add $2,$3,$4`
149			`sb $2,0($20) #A`
150			`sb $23,0($20)`
151			`sb $21,0($20)`
152
153			`# DIV not implemented so skip div test`
154			`# FIXME skip conditionaly`
155			`j skip_div_test`
156			`nop`
157
158			`#e: DIV`
159			`ori $2,$0,'e'`
160			`sb $2,0($20)`
161			`ori $2,$0,65*117+41`
162			`ori $3,$0,117`
163			`div $2,$3`
164			`nop`
165			`mflo $4`
166			`sb $4,0($20) #A`
167			`mfhi $4`
168			`addi $4,$4,66-41`
169			`sb $4,0($20) #B`
170			`li $2,-67*19`
171			`ori $3,$0,19`
172			`div $2,$3`
173			`nop`
174			`mflo $4`
175			`sub $4,$0,$4`
176			`sb $4,0($20) #C`
177			`ori $2,$0,68*23`
178			`li $3,-23`
179			`div $2,$3`
180			`nop`
181			`mflo $4`
182			`sub $4,$0,$4`
183			`sb $4,0($20) #D`
184			`li $2,-69*13`
185			`li $3,-13`
186			`div $2,$3`
187			`mflo $4`
188			`sb $4,0($20) #E`
189			`sb $23,0($20)`
190			`sb $21,0($20)`
191
192			`#f: DIVU`
193			`ori $2,$0,'f'`
194			`sb $2,0($20)`
195			`ori $2,$0,65*13`
196			`ori $3,$0,13`
197			`divu $2,$3`
198			`nop`
199			`mflo $4`
200			`sb $4,0($20) #A`
201			`sb $23,0($20)`
202			`sb $21,0($20)`
203
204			`skip_div_test:`
205
206			`# MUL not implemented so skip mul test`
207			`# FIXME skip conditionaly`
208			`j skip_mult_test`
209			`nop`
210
211			`#g: MULT`
212			`ori $2,$0,'g'`
213			`sb $2,0($20)`
214			`ori $2,$0,5`
215			`ori $3,$0,13`
216			`mult $2,$3`
217			`nop`
218			`mflo $4`
219			`sb $4,0($20) #A`
220			`li $2,-5`
221			`ori $3,$0,13`
222			`mult $2,$3`
223			`mfhi $5`
224			`mflo $4`
225			`sub $4,$0,$4`
226			`addu $4,$4,$5`
227			`addi $4,$4,2`
228			`sb $4,0($20) #B`
229			`ori $2,$0,5`
230			`li $3,-13`
231			`mult $2,$3`
232			`mfhi $5`
233			`mflo $4`
234			`sub $4,$0,$4`
235			`addu $4,$4,$5`
236			`addi $4,$4,3`
237			`sb $4,0($20) #C`
238			`li $2,-5`
239			`li $3,-13`
240			`mult $2,$3`
241			`mfhi $5`
242			`mflo $4`
243			`addu $4,$4,$5`
244			`addi $4,$4,3`
245			`sb $4,0($20) #D`
246			`lui $4,0xfe98`
247			`ori $4,$4,0x62e5`
248			`lui $5,0x6`
249			`ori $5,0x8db8`
250			`mult $4,$5`
251			`mfhi $6`
252			`addiu $7,$6,2356+1+'E' #E`
253			`sb $7,0($20)`
254			`sb $23,0($20)`
255			`sb $21,0($20)`
256
257			`#h: MULTU`
258			`ori $2,$0,'h'`
259			`sb $2,0($20)`
260			`ori $2,$0,5`
261			`ori $3,$0,13`
262			`multu $2,$3`
263			`nop`
264			`mflo $4`
265			`sb $4,0($20) #A`
266			`sb $23,0($20)`
267			`sb $21,0($20)`
268
269			`skip_mult_test:`
270
271			`#i: SLT`
272			`ori $2,$0,'i'`
273			`sb $2,0($20)`
274			`ori $2,$0,10`
275			`ori $3,$0,12`
276			`slt $4,$2,$3`
277			`addi $5,$4,64`
278			`sb $5,0($20) #A`
279			`slt $4,$3,$2`
280			`addi $5,$4,66`
281			`sb $5,0($20) #B`
282			`li $2,0xfffffff0`
283			`slt $4,$2,$3`
284			`addi $5,$4,66`
285			`sb $5,0($20) #C`
286			`slt $4,$3,$2`
287			`addi $5,$4,68`
288			`sb $5,0($20) #D`
289			`li $3,0xffffffff`
290			`slt $4,$2,$3`
291			`addi $5,$4,68`
292			`sb $5,0($20) #E`
293			`slt $4,$3,$2`
294			`addi $5,$4,70`
295			`sb $5,0($20) #F`
296			`sb $23,0($20)`
297			`sb $21,0($20)`
298
299			`#j: SLTI`
300			`ori $2,$0,'j'`
301			`sb $2,0($20)`
302			`ori $2,$0,10`
303			`slti $4,$2,12`
304			`addi $5,$4,64`
305			`sb $5,0($20) #A`
306			`slti $4,$2,8`
307			`addi $5,$4,66`
308			`sb $5,0($20) #B`
309			`sb $23,0($20)`
310			`sb $21,0($20)`
311
312			`#k: SLTIU`
313			`ori $2,$0,'k'`
314			`sb $2,0($20)`
315			`ori $2,$0,10`
316			`sltiu $4,$2,12`
317			`addi $5,$4,64`
318			`sb $5,0($20) #A`
319			`sltiu $4,$2,8`
320			`addi $5,$4,66`
321			`sb $5,0($20) #B`
322			`sb $23,0($20)`
323			`sb $21,0($20)`
324
325			`#l: SLTU`
326			`ori $2,$0,'l'`
327			`sb $2,0($20)`
328			`ori $2,$0,10`
329			`ori $3,$0,12`
330			`slt $4,$2,$3`
331			`addi $5,$4,64`
332			`sb $5,0($20) #A`
333			`slt $4,$3,$2`
334			`addi $5,$4,66`
335			`sb $5,0($20) #B`
336			`sb $23,0($20)`
337			`sb $21,0($20)`
338
339			`#m: SUB`
340			`ori $2,$0,'m'`
341			`sb $2,0($20)`
342			`ori $3,$0,70`
343			`ori $4,$0,5`
344			`sub $2,$3,$4`
345			`sb $2,0($20) #A`
346			`sb $23,0($20)`
347			`sb $21,0($20)`
348
349			`#n: SUBU`
350			`ori $2,$0,'n'`
351			`sb $2,0($20)`
352			`ori $3,$0,70`
353			`ori $4,$0,5`
354			`sub $2,$3,$4`
355			`sb $2,0($20) #A`
356			`sb $23,0($20)`
357			`sb $21,0($20)`
358
359			`######################################`
360			`#Branch and Jump Instructions`
361			`######################################`
362			`BranchTest:`
363			`ori $2,$0,'B'`
364			`sb $2,0($20)`
365			`ori $2,$0,'r'`
366			`sb $2,0($20)`
367			`ori $2,$0,'a'`
368			`sb $2,0($20)`
369			`ori $2,$0,'n'`
370			`sb $2,0($20)`
371			`ori $2,$0,'c'`
372			`sb $2,0($20)`
373			`ori $2,$0,'h'`
374			`sb $2,0($20)`
375			`sb $23,0($20)`
376			`sb $21,0($20)`
377
378			`#a: B`
379			`ori $2,$0,'a'`
380			`sb $2,0($20)`
381			`ori $10,$0,'A'`
382			`ori $11,$0,'B'`
383			`b $B1`
384			`sb $10,0($20)`
385			`sb $22,0($20)`
386			`$B1:`
387			`sb $11,0($20)`
388			`sb $23,0($20)`
389			`sb $21,0($20)`
390
391			`#b: BAL`
392			`ori $2,$0,'b'`
393			`sb $2,0($20)`
394			`ori $10,$0,'A'`
395			`ori $11,$0,'B'`
396			`ori $12,$0,'C'`
397			`ori $13,$0,'D'`
398			`ori $14,$0,'E'`
399			`ori $15,$0,'X'`
400			`bal $BAL1`
401			`sb $10,0($20)`
402			`sb $13,0($20)`
403			`b $BAL2`
404			`sb $14,0($20)`
405			`sb $15,0($20)`
406			`$BAL1:`
407			`sb $11,0($20)`
408			`jr $31`
409			`sb $12,0($20)`
410			`sb $22,0($20)`
411			`$BAL2:`
412			`sb $23,0($20)`
413			`sb $21,0($20)`
414
415			`#c: BEQ`
416			`ori $2,$0,'c'`
417			`sb $2,0($20)`
418			`ori $10,$0,'A'`
419			`ori $11,$0,'B'`
420			`ori $12,$0,'C'`
421			`ori $13,$0,'D'`
422			`ori $2,$0,100`
423			`ori $3,$0,123`
424			`ori $4,$0,123`
425			`beq $2,$3,$BEQ1`
426			`sb $10,0($20)`
427			`sb $11,0($20)`
428			`beq $3,$4,$BEQ1`
429			`sb $12,0($20)`
430			`sb $22,0($20)`
431			`$BEQ1:`
432			`sb $13,0($20)`
433			`sb $23,0($20)`
434			`sb $21,0($20)`
435
436			`#d: BGEZ`
437			`ori $2,$0,'d'`
438			`sb $2,0($20)`
439			`ori $10,$0,'A'`
440			`ori $11,$0,'B'`
441			`ori $12,$0,'C'`
442			`ori $13,$0,'D'`
443			`or $15,$0,'X'`
444			`ori $2,$0,100`
445			`li $3,0xffff1234`
446			`ori $4,$0,123`
447			`bgez $3,$BGEZ1`
448			`sb $10,0($20)`
449			`sb $11,0($20)`
450			`bgez $2,$BGEZ1`
451			`sb $12,0($20)`
452			`sb $22,0($20)`
453			`$BGEZ1:`
454			`bgez $0,$BGEZ2`
455			`nop`
456			`sb $15,0($20)`
457			`$BGEZ2:`
458			`sb $13,0($20)`
459			`sb $23,0($20)`
460			`sb $21,0($20)`
461
462			`#e: BGEZAL`
463			`ori $2,$0,'e'`
464			`sb $2,0($20)`
465			`ori $10,$0,'A'`
466			`ori $11,$0,'B'`
467			`ori $12,$0,'C'`
468			`ori $13,$0,'D'`
469			`ori $14,$0,'E'`
470			`ori $15,$0,'X'`
471			`li $3,0xffff1234`
472			`bgezal $3,$BGEZAL1`
473			`nop`
474			`sb $10,0($20)`
475			`bgezal $0,$BGEZAL1`
476			`nop`
477			`sb $13,0($20)`
478			`b $BGEZAL2`
479			`sb $14,0($20)`
480			`sb $15,0($20)`
481			`$BGEZAL1:`
482			`sb $11,0($20)`
483			`jr $31`
484			`sb $12,0($20)`
485			`sb $22,0($20)`
486			`$BGEZAL2:`
487			`sb $23,0($20)`
488			`sb $21,0($20)`
489
490			`#f: BGTZ`
491			`ori $2,$0,'f'`
492			`sb $2,0($20)`
493			`ori $10,$0,'A'`
494			`ori $11,$0,'B'`
495			`ori $12,$0,'C'`
496			`ori $13,$0,'D'`
497			`ori $2,$0,100`
498			`li $3,0xffff1234`
499			`bgtz $3,$BGTZ1`
500			`sb $10,0($20)`
501			`sb $11,0($20)`
502			`bgtz $2,$BGTZ1`
503			`sb $12,0($20)`
504			`sb $22,0($20)`
505			`$BGTZ1:`
506			`sb $13,0($20)`
507			`sb $23,0($20)`
508			`sb $21,0($20)`
509
510			`#g: BLEZ`
511			`ori $2,$0,'g'`
512			`sb $2,0($20)`
513			`ori $10,$0,'A'`
514			`ori $11,$0,'B'`
515			`ori $12,$0,'C'`
516			`ori $13,$0,'D'`
517			`ori $2,$0,100`
518			`li $3,0xffff1234`
519			`blez $2,$BLEZ1`
520			`sb $10,0($20)`
521			`sb $11,0($20)`
522			`blez $3,$BLEZ1`
523			`sb $12,0($20)`
524			`sb $22,0($20)`
525			`$BLEZ1:`
526			`blez $0,$BLEZ2`
527			`nop`
528			`sb $22,0($20)`
529			`$BLEZ2:`
530			`sb $13,0($20)`
531			`sb $23,0($20)`
532			`sb $21,0($20)`
533
534			`#h: BLTZ`
535			`ori $2,$0,'h'`
536			`sb $2,0($20)`
537			`ori $10,$0,'A'`
538			`ori $11,$0,'B'`
539			`ori $12,$0,'C'`
540			`ori $13,$0,'D'`
541			`ori $14,$0,'E'`
542			`ori $2,$0,100`
543			`li $3,0xffff1234`
544			`ori $4,$0,0`
545			`bltz $2,$BLTZ1`
546			`sb $10,0($20)`
547			`sb $11,0($20)`
548			`bltz $3,$BLTZ1`
549			`sb $12,0($20)`
550			`sb $22,0($20)`
551			`$BLTZ1:`
552			`bltz $4,$BLTZ2`
553			`nop`
554			`sb $13,0($20)`
555			`$BLTZ2:`
556			`sb $14,0($20)`
557			`sb $23,0($20)`
558			`sb $21,0($20)`
559
560			`#i: BLTZAL`
561			`ori $2,$0,'i'`
562			`sb $2,0($20)`
563			`ori $10,$0,'A'`
564			`ori $11,$0,'B'`
565			`ori $12,$0,'C'`
566			`ori $13,$0,'D'`
567			`ori $14,$0,'E'`
568			`ori $15,$0,'X'`
569			`li $3,0xffff1234`
570			`bltzal $0,$BLTZAL1`
571			`nop`
572			`sb $10,0($20)`
573			`bltzal $3,$BLTZAL1`
574			`nop`
575			`sb $13,0($20)`
576			`b $BLTZAL2`
577			`sb $14,0($20)`
578			`sb $15,0($20)`
579			`$BLTZAL1:`
580			`sb $11,0($20)`
581			`jr $31`
582			`sb $12,0($20)`
583			`sb $22,0($20)`
584			`$BLTZAL2:`
585			`sb $23,0($20)`
586			`sb $21,0($20)`
587
588			`#j: BNE`
589			`ori $2,$0,'j'`
590			`sb $2,0($20)`
591			`ori $10,$0,'A'`
592			`ori $11,$0,'B'`
593			`ori $12,$0,'C'`
594			`ori $13,$0,'D'`
595			`ori $2,$0,100`
596			`ori $3,$0,123`
597			`ori $4,$0,123`
598			`bne $3,$4,$BNE1`
599			`sb $10,0($20)`
600			`sb $11,0($20)`
601			`bne $2,$3,$BNE1`
602			`sb $12,0($20)`
603			`sb $22,0($20)`
604			`$BNE1:`
605			`sb $13,0($20)`
606			`sb $23,0($20)`
607			`sb $21,0($20)`
608
609			`#k: J`
610			`ori $2,$0,'k'`
611			`sb $2,0($20)`
612			`ori $10,$0,'A'`
613			`ori $11,$0,'B'`
614			`ori $15,$0,'X'`
615			`j $J1`
616			`sb $10,0($20)`
617			`sb $15,0($20)`
618			`$J1:`
619			`sb $11,0($20)`
620			`sb $23,0($20)`
621			`sb $21,0($20)`
622
623			`#l: JAL`
624			`ori $2,$0,'l'`
625			`sb $2,0($20)`
626			`ori $10,$0,'A'`
627			`ori $11,$0,'B'`
628			`ori $12,$0,'C'`
629			`ori $13,$0,'D'`
630			`ori $14,$0,'E'`
631			`ori $15,$0,'X'`
632			`jal $JAL1`
633			`sb $10,0($20)`
634			`sb $13,0($20)`
635			`b $JAL2`
636			`sb $14,0($20)`
637			`sb $15,0($20)`
638			`$JAL1:`
639			`sb $11,0($20)`
640			`jr $31`
641			`sb $12,0($20)`
642			`sb $22,0($20)`
643			`$JAL2:`
644			`sb $23,0($20)`
645			`sb $21,0($20)`
646
647			`#m: JALR`
648			`ori $2,$0,'m'`
649			`sb $2,0($20)`
650			`ori $10,$0,'A'`
651			`ori $11,$0,'B'`
652			`ori $12,$0,'C'`
653			`ori $13,$0,'D'`
654			`ori $14,$0,'E'`
655			`ori $15,$0,'X'`
656			`la $3,$JALR1`
657			`jalr $3`
658			`sb $10,0($20)`
659			`sb $13,0($20)`
660			`b $JALR2`
661			`sb $14,0($20)`
662			`sb $15,0($20)`
663			`$JALR1:`
664			`sb $11,0($20)`
665			`jr $31`
666			`sb $12,0($20)`
667			`sb $22,0($20)`
668			`$JALR2:`
669			`sb $23,0($20)`
670			`sb $21,0($20)`
671
672			`#n: JR`
673			`ori $2,$0,'n'`
674			`sb $2,0($20)`
675			`ori $10,$0,'A'`
676			`ori $11,$0,'B'`
677			`ori $15,$0,'X'`
678			`la $3,$JR1`
679			`jr $3`
680			`sb $10,0($20)`
681			`sb $15,0($20)`
682			`$JR1:`
683			`sb $11,0($20)`
684			`sb $23,0($20)`
685			`sb $21,0($20)`
686
687			`#o: NOP`
688			`ori $2,$0,'o'`
689			`sb $2,0($20)`
690			`ori $2,$0,65`
691			`nop`
692			`sb $2,0($20)`
693			`sb $23,0($20)`
694			`sb $21,0($20)`
695
696			`# b LoadTest`
697
698			`BreakTest:`
699			`#p: BREAK`
700			`ori $2,$0,'p'`
701			`sb $2,0($20)`
702			`ori $2,$0,'z'`
703			`ori $4,$0,59`
704			`break 0`
705			`addi $4,$4,1`
706			`sb $4,0($20)`
707			`sb $23,0($20)`
708			`sb $21,0($20)`
709
710			`#q: SYSCALL`
711			`ori $2,$0,'q'`
712			`sb $2,0($20)`
713			`ori $4,$0,61`
714			`syscall 0`
715			`addi $4,$4,-1`
716			`sb $4,0($20)`
717			`sb $23,0($20)`
718			`sb $21,0($20)`
719
720
721			`######################################`
722			`#Load, Store, and Memory Control Instructions`
723			`######################################`
724			`LoadTest:`
725			`ori $2,$0,'L'`
726			`sb $2,0($20)`
727			`ori $2,$0,'o'`
728			`sb $2,0($20)`
729			`ori $2,$0,'a'`
730			`sb $2,0($20)`
731			`ori $2,$0,'d'`
732			`sb $2,0($20)`
733			`sb $23,0($20)`
734			`sb $21,0($20)`
735
736			`#a: LB`
737			`ori $2,$0,'a'`
738			`sb $2,0($20)`
739			`or $2,$0,$24`
740			`li $3,0x414243fc`
741			`sw $3,16($2) # 16($2) = 0x414243fc`
742			`lb $4,16($2) # $4 = 0x41`
743			`sb $4,0($20) # UART = 0x41`
744			`lb $4,17($2) # $4 = 0x42`
745			`nop`
746			`sb $4,0($20) # UART = 0x42`
747			`lb $4,18($2) # $4 = 0x43`
748			`nop`
749			`sb $4,0($20) # UART = 0x43`
750			`lb $2,19($2) # $2 = 0xffff.fffc`
751			`nop`
752			`sra $3,$2,8 # $3 = 0xffff.ffff`
753			`addi $3,$3,0x45 # $3 = 0x44`
754			`sb $3,0($20) # UART = 0x44`
755			`addi $2,$2,0x49 # $4 = 0x45, overflow`
756			`sb $2,0($20) # UART = 0x45`
757			`sb $23,0($20) # UART = CR`
758			`sb $21,0($20) # UART = LF`
759
760			`#b: LBU`
761			`ori $2,$0,'b'`
762			`sb $2,0($20)`
763			`or $2,$0,$24`
764			`li $3,0x41424344`
765			`sw $3,16($2)`
766			`lb $4,16($2)`
767			`sb $4,0($20)`
768			`lb $4,17($2)`
769			`sb $4,0($20)`
770			`lb $4,18($2)`
771			`sb $4,0($20)`
772			`lb $2,19($2)`
773			`sb $2,0($20)`
774			`sb $23,0($20)`
775			`sb $21,0($20)`
776
777			`#c: LH`
778			`ori $2,$0,'c'`
779			`sb $2,0($20)`
780			`or $2,$0,$24`
781			`li $3,0x00410042`
782			`sw $3,16($2)`
783			`lh $4,16($2)`
784			`sb $4,0($20)`
785			`lh $2,18($2)`
786			`sb $2,0($20)`
787			`sb $23,0($20)`
788			`sb $21,0($20)`
789
790			`#d: LHU`
791			`ori $2,$0,'d'`
792			`sb $2,0($20)`
793			`or $2,$0,$24`
794			`li $3,0x00410042`
795			`sw $3,16($2)`
796			`lh $4,16($2)`
797			`sb $4,0($20)`
798			`lh $2,18($2)`
799			`sb $2,0($20)`
800			`sb $23,0($20)`
801			`sb $21,0($20)`
802
803			`#e: LW`
804			`ori $2,$0,'e'`
805			`sb $2,0($20)`
806			`or $2,$0,$24`
807			`li $3,'A'`
808			`sw $3,16($2)`
809			`ori $3,$0,0`
810			`lw $2,16($2)`
811			`sb $2,0($20)`
812			`sb $23,0($20)`
813			`sb $21,0($20)`
814
815			`.ifgt TEST_UNALIGNED_LOADS`
816			`#f: LWL & LWR`
817			`ori $2,$0,'f'`
818			`sb $2,0($20)`
819			`or $2,$0,$24`
820			`li $3,'A'`
821			`sw $3,16($2)`
822			`ori $3,$0,0`
823			`lwl $2,16($2)`
824			`lwr $2,16($2)`
825			`sb $2,0($20)`
826			`sb $23,0($20)`
827			`sb $21,0($20)`
828			`.endif`
829
830			`#g: SB`
831			`ori $2,$0,'g'`
832			`sb $2,0($20)`
833			`ori $2,$0,'A'`
834			`sb $2,0($20)`
835			`sb $23,0($20)`
836			`sb $21,0($20)`
837
838			`#h: SH`
839			`ori $2,$0,'h'`
840			`sb $2,0($20)`
841			`or $4,$0,$24`
842			`ori $2,$0,0x4142`
843			`sh $2,16($4)`
844			`lb $3,16($4)`
845			`sb $3,0($20)`
846			`lb $2,17($4)`
847			`sb $2,0($20)`
848			`sb $23,0($20)`
849			`sb $21,0($20)`
850
851			`#i: SW`
852			`ori $2,$0,'i'`
853			`sb $2,0($20)`
854			`or $2,$0,$24`
855			`li $3,0x41424344`
856			`sw $3,16($2)`
857			`lb $4,16($2)`
858			`sb $4,0($20)`
859			`lb $4,17($2)`
860			`sb $4,0($20)`
861			`lb $4,18($2)`
862			`sb $4,0($20)`
863			`lb $2,19($2)`
864			`sb $2,0($20)`
865			`sb $23,0($20)`
866			`sb $21,0($20)`
867
868			`.ifgt TEST_UNALIGNED_STORES`
869			`#j: SWL & SWR`
870			`ori $2,$0,'j'`
871			`sb $2,0($20)`
872			`or $2,$0,$24`
873			`li $3,0x41424344`
874			`swl $3,16($2)`
875			`swr $3,16($2)`
876			`lb $4,16($2)`
877			`sb $4,0($20)`
878			`lb $4,17($2)`
879			`sb $4,0($20)`
880			`lb $4,18($2)`
881			`sb $4,0($20)`
882			`lb $2,19($2)`
883			`sb $2,0($20)`
884			`sb $23,0($20)`
885			`sb $21,0($20)`
886			`.endif`
887
888			`######################################`
889			`#Logical Instructions`
890			`######################################`
891			`LogicalTest:`
892			`ori $2,$0,'L'`
893			`sb $2,0($20)`
894			`ori $2,$0,'o'`
895			`sb $2,0($20)`
896			`ori $2,$0,'g'`
897			`sb $2,0($20)`
898			`ori $2,$0,'i'`
899			`sb $2,0($20)`
900			`ori $2,$0,'c'`
901			`sb $2,0($20)`
902			`sb $23,0($20)`
903			`sb $21,0($20)`
904
905			`#a: AND`
906			`ori $2,$0,'a'`
907			`sb $2,0($20)`
908			`ori $2,$0,0x0741`
909			`ori $3,$0,0x60f3`
910			`and $4,$2,$3`
911			`sb $4,0($20)`
912			`sb $23,0($20)`
913			`sb $21,0($20)`
914
915			`#b: ANDI`
916			`ori $2,$0,'b'`
917			`sb $2,0($20)`
918			`ori $2,$0,0x0741`
919			`andi $4,$2,0x60f3`
920			`sb $4,0($20)`
921			`sb $23,0($20)`
922			`sb $21,0($20)`
923
924			`#c: LUI`
925			`ori $2,$0,'c'`
926			`sb $2,0($20)`
927			`lui $2,0x41`
928			`srl $3,$2,16`
929			`sb $3,0($20)`
930			`sb $23,0($20)`
931			`sb $21,0($20)`
932
933			`#d: NOR`
934			`ori $2,$0,'d'`
935			`sb $2,0($20)`
936			`li $2,0xf0fff08e`
937			`li $3,0x0f0f0f30`
938			`nor $4,$2,$3`
939			`sb $4,0($20)`
940			`sb $23,0($20)`
941			`sb $21,0($20)`
942
943			`#e: OR`
944			`ori $2,$0,'e'`
945			`sb $2,0($20)`
946			`ori $2,$0,0x40`
947			`ori $3,$0,0x01`
948			`or $4,$2,$3`
949			`sb $4,0($20)`
950			`sb $23,0($20)`
951			`sb $21,0($20)`
952
953			`#f: ORI`
954			`ori $2,$0,'f'`
955			`sb $2,0($20)`
956			`ori $2,$0,0x40`
957			`ori $4,$2,0x01`
958			`sb $4,0($20)`
959			`sb $23,0($20)`
960			`sb $21,0($20)`
961
962			`#g: XOR`
963			`ori $2,$0,'g'`
964			`sb $2,0($20)`
965			`ori $2,$0,0xf043`
966			`ori $3,$0,0xf002`
967			`xor $4,$2,$3`
968			`sb $4,0($20)`
969			`sb $23,0($20)`
970			`sb $21,0($20)`
971
972			`#h: XORI`
973			`ori $2,$0,'h'`
974			`sb $2,0($20)`
975			`ori $2,$0,0xf043`
976			`xor $4,$2,0xf002`
977			`sb $4,0($20)`
978			`sb $23,0($20)`
979			`sb $21,0($20)`
980
981
982			`######################################`
983			`#Move Instructions`
984			`######################################`
985			`MoveTest:`
986			`ori $2,$0,'M'`
987			`sb $2,0($20)`
988			`ori $2,$0,'o'`
989			`sb $2,0($20)`
990			`ori $2,$0,'v'`
991			`sb $2,0($20)`
992			`ori $2,$0,'e'`
993			`sb $2,0($20)`
994			`sb $23,0($20)`
995			`sb $21,0($20)`
996
997			`#a: MFHI`
998			`ori $2,$0,'a'`
999			`sb $2,0($20)`
1000			`ori $2,$0,65`
1001			`mthi $2`
1002			`mfhi $3`
1003			`sb $3,0($20)`
1004			`sb $23,0($20)`
1005			`sb $21,0($20)`
1006
1007			`#b: MFLO`
1008			`ori $2,$0,'b'`
1009			`sb $2,0($20)`
1010			`ori $2,$0,65`
1011			`mtlo $2`
1012			`mflo $3`
1013			`sb $3,0($20)`
1014			`sb $23,0($20)`
1015			`sb $21,0($20)`
1016
1017			`#c: MTHI`
1018			`ori $2,$0,'c'`
1019			`sb $2,0($20)`
1020			`ori $2,$0,65`
1021			`mthi $2`
1022			`mfhi $3`
1023			`sb $3,0($20)`
1024			`sb $23,0($20)`
1025			`sb $21,0($20)`
1026
1027			`#d: MTLO`
1028			`ori $2,$0,'d'`
1029			`sb $2,0($20)`
1030			`ori $2,$0,65`
1031			`mtlo $2`
1032			`mflo $3`
1033			`sb $3,0($20)`
1034			`sb $23,0($20)`
1035			`sb $21,0($20)`
1036
1037
1038			`######################################`
1039			`#Shift Instructions`
1040			`######################################`
1041			`ShiftTest:`
1042			`ori $2,$0,'S'`
1043			`sb $2,0($20)`
1044			`ori $2,$0,'h'`
1045			`sb $2,0($20)`
1046			`ori $2,$0,'i'`
1047			`sb $2,0($20)`
1048			`ori $2,$0,'f'`
1049			`sb $2,0($20)`
1050			`ori $2,$0,'t'`
1051			`sb $2,0($20)`
1052			`sb $23,0($20)`
1053			`sb $21,0($20)`
1054
1055			`#a: SLL`
1056			`ori $2,$0,'a'`
1057			`sb $2,0($20)`
1058			`li $2,0x40414243`
1059			`sll $3,$2,8`
1060			`srl $3,$3,24`
1061			`sb $3,0($20)`
1062			`sb $23,0($20)`
1063			`sb $21,0($20)`
1064
1065			`#b: SLLV`
1066			`ori $2,$0,'b'`
1067			`sb $2,0($20)`
1068			`li $2,0x40414243`
1069			`ori $3,$0,8`
1070			`sllv $3,$2,$3`
1071			`srl $3,$3,24`
1072			`sb $3,0($20)`
1073			`sb $23,0($20)`
1074			`sb $21,0($20)`
1075
1076			`#c: SRA`
1077			`ori $2,$0,'c'`
1078			`sb $2,0($20)`
1079			`li $2,0x40414243`
1080			`sra $3,$2,16`
1081			`sb $3,0($20)`
1082			`li $2,0x84000000`
1083			`sra $3,$2,25`
1084			`sub $3,$3,0x80`
1085			`sb $3,0($20)`
1086			`sb $23,0($20)`
1087			`sb $21,0($20)`
1088
1089			`#d: SRAV`
1090			`ori $2,$0,'d'`
1091			`sb $2,0($20)`
1092			`li $2,0x40414243`
1093			`ori $3,$0,16`
1094			`srav $3,$2,$3`
1095			`sb $3,0($20)`
1096			`ori $3,$0,25`
1097			`li $2,0x84000000`
1098			`srav $3,$2,$3`
1099			`sub $3,$3,0x80`
1100			`sb $3,0($20)`
1101			`sb $23,0($20)`
1102			`sb $21,0($20)`
1103
1104			`#e: SRL`
1105			`ori $2,$0,'e'`
1106			`sb $2,0($20)`
1107			`li $2,0x40414243`
1108			`srl $3,$2,16`
1109			`sb $3,0($20)`
1110			`li $2,0x84000000`
1111			`srl $3,$2,25`
1112			`sb $3,0($20)`
1113			`sb $23,0($20)`
1114			`sb $21,0($20)`
1115
1116			`#f: SRLV`
1117			`ori $2,$0,'f'`
1118			`sb $2,0($20)`
1119			`li $2,0x40414243`
1120			`ori $3,$0,16`
1121			`srlv $4,$2,$3`
1122			`sb $4,0($20)`
1123			`ori $3,$0,25`
1124			`li $2,0x84000000`
1125			`srlv $3,$2,$3`
1126			`sb $3,0($20)`
1127			`sb $23,0($20)`
1128			`sb $21,0($20)`
1129
1130
1131			`ori $2,$0,'D'`
1132			`sb $2,0($20)`
1133			`ori $2,$0,'o'`
1134			`sb $2,0($20)`
1135			`ori $2,$0,'n'`
1136			`sb $2,0($20)`
1137			`ori $2,$0,'e'`
1138			`sb $2,0($20)`
1139			`sb $23,0($20)`
1140			`sb $21,0($20)`
1141
1142
1143			`$DONE:`
1144			`j $DONE`
1145			`nop`
1146
1147			`.set reorder`
1148			`.end entry`
1149

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