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URL https://opencores.org/ocsvn/yacc/yacc/trunk

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[/] [yacc/] [trunk/] [doc/] [instruction.htm] - Blame information for rev 4

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1 2 tak.sugawa 
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
2 
<HTML>
3 
<HEAD>
4 
<META http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
5 
<META name="GENERATOR" content="IBM WebSphere Studio Homepage Builder Version 9.0.2.0 for Windows">
6 
<META http-equiv="Content-Style-Type" content="text/css">
7 
<TITLE></TITLE>
8 
</HEAD>
9 
<BODY>
10 
<P><B>2.3 Supported Instructions</B><BR>
11 
<BR>
12 
Not supported item is displayed as <FONT color="#ff0000">red characters</FONT>.<BR>
13 
Unaligned load and store operations (LWL,SWL,LWR,SWR) are not supported.<BR>
14 
</P>
15 
<H3>ADD -- <I>Add</I></H3>
16 
<TABLE border=1>
17 
<TBODY>
18 
<TR>
19 
<TD>Description:
20 
 
21 
 
22 
      <TD>Adds two registers and stores the result in a register<FONT color="#ff0000">(Exception by Overflow)</FONT>
23 
 
24 
 
25 
 
26 
    <TR>
27 
<TD>Operation:
28 
 
29 
 
30 
      <TD>$d = $s + $t;
31 
 
32 
 
33 
 
34 
    <TR>
35 
<TD>Syntax:
36 
 
37 
 
38 
      <TD>add $d, $s, $t
39 
 
40 
 
41 
 
42 
 
43 
    <TR>
44 
<TD>Encoding:
45 
 
46 
 
47 
      <TD>
48 
      <TABLE border="1" width="476">
49 
        <TBODY>
50 
          <TR>
51 
            <TD width="93" height="35">OPCODE</TD>
52 
            <TD width="25" height="35">Source</TD>
53 
            <TD width="82" height="35">Target</TD>
54 
            <TD width="62" height="35">Destination</TD>
55 
            <TD width="134" height="35">Shift</TD>
56 
            <TD height="35">Function</TD>
57 
          </TR>
58 
          <TR>
59 
            <TD width="93" height="30">6fbOOOOOO</TD>
60 
            <TD width="25" height="30">5bit</TD>
61 
            <TD width="82" height="30">5bit</TD>
62 
            <TD width="62" height="30">5bit</TD>
63 
            <TD width="134" height="30">5bit</TD>
64 
            <TD height="30">6'b100_000</TD>
65 
          </TR>
66 
        </TBODY>
67 
      </TABLE>
68 
 
69 
 
70 
    </TR>
71 
  </TBODY>
72 
</TABLE>
73 
<H3>ADDI -- <I>Add immediate</I></H3>
74 
<TABLE border=1>
75 
<TBODY>
76 
<TR>
77 
<TD>Description:
78 
 
79 
 
80 
      <TD>Adds a register and a signed immediate value and stores the result in a
81 
register
82 
 
83 
 
84 
 
85 
 
86 
    <TR>
87 
<TD>Operation:
88 
 
89 
 
90 
      <TD>$t = $s + imm;
91 
 
92 
 
93 
 
94 
    <TR>
95 
<TD>Syntax:
96 
 
97 
 
98 
      <TD>addi $t, $s, imm
99 
 
100 
 
101 
 
102 
 
103 
    <TR>
104 
<TD>Encoding:
105 
 
106 
 
107 
      <TD>
108 
      <TABLE border="1" width="507">
109 
        <TBODY>
110 
          <TR>
111 
            <TD width="93" height="35">OPCODE</TD>
112 
            <TD width="25" height="35">Source</TD>
113 
            <TD width="82" height="35">Target</TD>
114 
            <TD colspan="4">Immediate</TD>
115 
          </TR>
116 
          <TR>
117 
            <TD width="93" height="30"><CODE>6'b001000</CODE></TD>
118 
            <TD width="25" height="30">5bit</TD>
119 
            <TD width="82" height="30">5bit</TD>
120 
            <TD colspan="4">16bit</TD>
121 
          </TR>
122 
        </TBODY>
123 
      </TABLE>
124 
 
125 
 
126 
    </TR>
127 
  </TBODY>
128 
</TABLE>
129 
<H3>ADDIU -- <I>Add immediate unsigned</I></H3>
130 
<TABLE border="1" width="595" height="152">
131 
<TBODY>
132 
<TR>
133 
<TD>Description:
134 
 
135 
 
136 
      <TD>Adds a register and an unsigned immediate value and stores the result in a
137 
register
138 
 
139 
 
140 
 
141 
 
142 
    <TR>
143 
<TD>Operation:
144 
 
145 
 
146 
      <TD>$t = $s + imm;
147 
 
148 
 
149 
 
150 
    <TR>
151 
<TD>Syntax:
152 
 
153 
 
154 
      <TD>addiu $t, $s, imm
155 
 
156 
 
157 
 
158 
 
159 
    <TR>
160 
<TD>Encoding:
161 
 
162 
 
163 
      <TD>
164 
      <TABLE border="1" width="507">
165 
        <TBODY>
166 
          <TR>
167 
            <TD width="93" height="35">OPCODE</TD>
168 
            <TD width="25" height="35">Source</TD>
169 
            <TD width="82" height="35">Target</TD>
170 
            <TD colspan="4">Immediate</TD>
171 
          </TR>
172 
          <TR>
173 
            <TD width="93" height="30"><CODE>6'b001001</CODE></TD>
174 
            <TD width="25" height="30">5bit</TD>
175 
            <TD width="82" height="30">5bit</TD>
176 
            <TD colspan="4">16bit</TD>
177 
          </TR>
178 
        </TBODY>
179 
      </TABLE>
180 
 
181 
 
182 
    </TR>
183 
  </TBODY>
184 
</TABLE>
185 
<H3>ADDU -- <I>Add unsigned</I></H3>
186 
<TABLE border=1>
187 
<TBODY>
188 
<TR>
189 
<TD>Description:
190 
 
191 
 
192 
      <TD>Adds two registers and stores the result in a register
193 
 
194 
 
195 
 
196 
    <TR>
197 
<TD>Operation:
198 
 
199 
 
200 
      <TD>$d = $s + $t;
201 
 
202 
 
203 
 
204 
    <TR>
205 
<TD>Syntax:
206 
 
207 
 
208 
      <TD>addu $d, $s, $t
209 
 
210 
 
211 
 
212 
 
213 
    <TR>
214 
<TD>Encoding:
215 
 
216 
 
217 
      <TD>
218 
      <TABLE border="1" width="476">
219 
        <TBODY>
220 
          <TR>
221 
            <TD width="93" height="35">OPCODE</TD>
222 
            <TD width="25" height="35">Source</TD>
223 
            <TD width="82" height="35">Target</TD>
224 
            <TD width="62" height="35">Destination</TD>
225 
            <TD width="134" height="35">Shift</TD>
226 
            <TD height="35">Function</TD>
227 
          </TR>
228 
          <TR>
229 
            <TD width="93" height="30">6fbOOOOOO</TD>
230 
            <TD width="25" height="30">5bit</TD>
231 
            <TD width="82" height="30">5bit</TD>
232 
            <TD width="62" height="30">5bit</TD>
233 
            <TD width="134" height="30">5'h0</TD>
234 
            <TD height="30">6'b100_001</TD>
235 
          </TR>
236 
        </TBODY>
237 
      </TABLE>
238 
 
239 
 
240 
    </TR>
241 
  </TBODY>
242 
</TABLE>
243 
<H3>AND -- <I>Bitwise and</I></H3>
244 
<TABLE border=1>
245 
<TBODY>
246 
<TR>
247 
<TD>Description:
248 
 
249 
 
250 
      <TD>Bitwise ands two registers and stores the result in a register
251 
 
252 
 
253 
 
254 
 
255 
    <TR>
256 
<TD>Operation:
257 
 
258 
 
259 
      <TD>$d = $s &amp; $t;
260 
 
261 
 
262 
 
263 
    <TR>
264 
<TD>Syntax:
265 
 
266 
 
267 
      <TD>and $d, $s, $t
268 
 
269 
 
270 
 
271 
 
272 
    <TR>
273 
<TD>Encoding:
274 
 
275 
 
276 
      <TD>
277 
      <TABLE border="1" width="476">
278 
        <TBODY>
279 
          <TR>
280 
            <TD width="98" height="42">OPCODE</TD>
281 
            <TD width="32" height="42">Source</TD>
282 
            <TD width="82" height="42">Target</TD>
283 
            <TD width="62" height="42">Destination</TD>
284 
            <TD width="134" height="42">Shift</TD>
285 
            <TD height="42">Function</TD>
286 
          </TR>
287 
          <TR>
288 
            <TD width="98" height="25">6fbOOOOOO</TD>
289 
            <TD width="32" height="25">5bit</TD>
290 
            <TD width="82" height="25">5bit</TD>
291 
            <TD width="62" height="25">5bit</TD>
292 
            <TD width="134" height="25">5'h0</TD>
293 
            <TD height="25">6'b100100</TD>
294 
          </TR>
295 
        </TBODY>
296 
      </TABLE>
297 
 
298 
 
299 
    </TR>
300 
  </TBODY>
301 
</TABLE>
302 
<H3>ANDI -- <I>Bitwise and immediate</I></H3>
303 
<TABLE border=1>
304 
<TBODY>
305 
<TR>
306 
<TD>Description:
307 
 
308 
 
309 
      <TD>Bitwise ands a register and an immediate value and stores the result in a
310 
register
311 
 
312 
 
313 
 
314 
 
315 
    <TR>
316 
<TD>Operation:
317 
 
318 
 
319 
      <TD>$t = $s &amp; imm;
320 
 
321 
 
322 
 
323 
    <TR>
324 
<TD>Syntax:
325 
 
326 
 
327 
      <TD>andi $t, $s, imm
328 
 
329 
 
330 
 
331 
 
332 
    <TR>
333 
<TD>Encoding:
334 
 
335 
 
336 
      <TD>
337 
      <TABLE border="1" width="519">
338 
        <TBODY>
339 
          <TR>
340 
            <TD width="93" height="37">OPCODE</TD>
341 
            <TD width="25" height="37">Source</TD>
342 
            <TD width="82" height="37">Target</TD>
343 
            <TD colspan="4" width="286" height="37">Immediate</TD>
344 
          </TR>
345 
          <TR>
346 
            <TD width="93" height="28"><CODE>6'b001100</CODE></TD>
347 
            <TD width="25" height="28">5bit</TD>
348 
            <TD width="82" height="28">5bit</TD>
349 
            <TD colspan="4" width="286" height="28">16bit</TD>
350 
          </TR>
351 
        </TBODY>
352 
      </TABLE>
353 
 
354 
 
355 
    </TR>
356 
  </TBODY>
357 
</TABLE>
358 
<H3>BEQ -- <I>Branch on equal</I></H3>
359 
<TABLE border=1>
360 
<TBODY>
361 
<TR>
362 
<TD>Description:
363 
 
364 
 
365 
      <TD>Branches if the two registers are equal
366 
 
367 
 
368 
 
369 
 
370 
    <TR>
371 
<TD>Operation:
372 
 
373 
 
374 
      <TD>if $s == $t PC +=imm &lt;&lt; 2;
375 
 
376 
 
377 
 
378 
    <TR>
379 
<TD>Syntax:
380 
 
381 
 
382 
      <TD>beq $s, $t, imm
383 
 
384 
 
385 
 
386 
    <TR>
387 
<TD>Encoding:
388 
 
389 
 
390 
      <TD>
391 
      <TABLE border="1" width="507">
392 
        <TBODY>
393 
          <TR>
394 
            <TD width="93" height="35">OPCODE</TD>
395 
            <TD width="25" height="35">Source</TD>
396 
            <TD width="82" height="35">Target</TD>
397 
            <TD colspan="4">Immediate</TD>
398 
          </TR>
399 
          <TR>
400 
            <TD width="93" height="30"><CODE>6'b000100</CODE></TD>
401 
            <TD width="25" height="30">5bit</TD>
402 
            <TD width="82" height="30">5'h0</TD>
403 
            <TD colspan="4">16bit</TD>
404 
          </TR>
405 
        </TBODY>
406 
      </TABLE>
407 
 
408 
 
409 
    </TR>
410 
  </TBODY>
411 
</TABLE>
412 
<H3>BGEZ -- <I>Branch on greater than or equal to zero</I></H3>
413 
<TABLE border=1>
414 
<TBODY>
415 
<TR>
416 
<TD>Description:
417 
 
418 
 
419 
      <TD>Branches if the register is greater than or equal to zero
420 
 
421 
 
422 
 
423 
 
424 
    <TR>
425 
<TD>Operation:
426 
 
427 
 
428 
      <TD>if $s &gt;= 0 PC +=offset &lt;&lt; 2;
429 
 
430 
 
431 
 
432 
    <TR>
433 
<TD>Syntax:
434 
 
435 
 
436 
      <TD>bgez $s, offset
437 
 
438 
 
439 
 
440 
 
441 
    <TR>
442 
<TD>Encoding:
443 
 
444 
 
445 
      <TD>
446 
      <TABLE border="1" width="507">
447 
        <TBODY>
448 
          <TR>
449 
            <TD width="93" height="35">OPCODE</TD>
450 
            <TD width="25" height="35">Source</TD>
451 
            <TD width="82" height="35">Target</TD>
452 
            <TD colspan="4">Immediate</TD>
453 
          </TR>
454 
          <TR>
455 
            <TD width="93" height="30"><CODE>6'b000001</CODE></TD>
456 
            <TD width="25" height="30">5bit</TD>
457 
            <TD width="82" height="30">5'b00001</TD>
458 
            <TD colspan="4">16bit</TD>
459 
          </TR>
460 
        </TBODY>
461 
      </TABLE>
462 
 
463 
 
464 
    </TR>
465 
  </TBODY>
466 
</TABLE>
467 
<H3><FONT color="#ff0000">BGEZAL -- Branch on greater than or equal to zero and link</FONT></H3>
468 
<TABLE border=1>
469 
<TBODY>
470 
<TR>
471 
<TD>Description:
472 
 
473 
 
474 
      <TD>Branches if the register is greater than or equal to zero and saves the
475 
return address in $31
476 
 
477 
 
478 
 
479 
 
480 
    <TR>
481 
<TD>Operation:
482 
 
483 
 
484 
      <TD>if $s &gt;= 0 $31 = PC + 8 ; PC +=imm &lt;&lt; 2;
485 
 
486 
 
487 
 
488 
    <TR>
489 
<TD>Syntax:
490 
 
491 
 
492 
      <TD>bgezal $s, imm
493 
 
494 
 
495 
 
496 
    <TR>
497 
<TD>Encoding:
498 
 
499 
 
500 
      <TD>
501 
      <TABLE border="1" width="595">
502 
        <TBODY>
503 
          <TR>
504 
            <TD width="93" height="35">OPCODE</TD>
505 
            <TD width="25" height="35">Source</TD>
506 
            <TD width="82" height="35">Target</TD>
507 
            <TD colspan="4">Immediate</TD>
508 
          </TR>
509 
          <TR>
510 
            <TD width="93" height="30"><CODE>6'b000001</CODE></TD>
511 
            <TD width="25" height="30">5bit</TD>
512 
            <TD width="82" height="30">5'h10001</TD>
513 
            <TD colspan="4">16bit</TD>
514 
          </TR>
515 
        </TBODY>
516 
      </TABLE>
517 
 
518 
 
519 
    </TR>
520 
  </TBODY>
521 
</TABLE>
522 
<H3>BGTZ -- <I>Branch on greater than zero</I></H3>
523 
<TABLE border=1>
524 
<TBODY>
525 
<TR>
526 
<TD>Description:
527 
 
528 
 
529 
      <TD>Branches if the register is greater than zero
530 
 
531 
 
532 
 
533 
 
534 
    <TR>
535 
<TD>Operation:
536 
 
537 
 
538 
      <TD>if $s &gt; 0 PC +=imm &lt;&lt; 2;
539 
 
540 
 
541 
 
542 
    <TR>
543 
<TD>Syntax:
544 
 
545 
 
546 
      <TD>bgtz $s, imm
547 
 
548 
 
549 
 
550 
    <TR>
551 
<TD>Encoding:
552 
 
553 
 
554 
      <TD>
555 
      <TABLE border="1" width="507">
556 
        <TBODY>
557 
          <TR>
558 
            <TD width="93" height="35">OPCODE</TD>
559 
            <TD width="25" height="35">Source</TD>
560 
            <TD width="82" height="35">Target</TD>
561 
            <TD colspan="4">Immediate</TD>
562 
          </TR>
563 
          <TR>
564 
            <TD width="93" height="30"><CODE>6'b000111</CODE></TD>
565 
            <TD width="25" height="30">5bit</TD>
566 
            <TD width="82" height="30">5'h0</TD>
567 
            <TD colspan="4">16bit</TD>
568 
          </TR>
569 
        </TBODY>
570 
      </TABLE>
571 
 
572 
 
573 
    </TR>
574 
  </TBODY>
575 
</TABLE>
576 
<H3>BLEZ -- <I>Branch on less than or equal to zero</I></H3>
577 
<TABLE border=1>
578 
<TBODY>
579 
<TR>
580 
<TD>Description:
581 
 
582 
 
583 
      <TD>Branches if the register is less than or equal to zero
584 
 
585 
 
586 
 
587 
 
588 
    <TR>
589 
<TD>Operation:
590 
 
591 
 
592 
      <TD>if $s &lt;= 0 PC +=imm &lt;&lt; 2;
593 
 
594 
 
595 
 
596 
    <TR>
597 
<TD>Syntax:
598 
 
599 
 
600 
      <TD>blez $s, imm
601 
 
602 
 
603 
 
604 
    <TR>
605 
<TD>Encoding:
606 
 
607 
 
608 
      <TD>
609 
      <TABLE border="1" width="507">
610 
        <TBODY>
611 
          <TR>
612 
            <TD width="93" height="35">OPCODE</TD>
613 
            <TD width="25" height="35">Source</TD>
614 
            <TD width="82" height="35">Target</TD>
615 
            <TD colspan="4">Immediate</TD>
616 
          </TR>
617 
          <TR>
618 
            <TD width="93" height="30"><CODE>6'b000110</CODE></TD>
619 
            <TD width="25" height="30">5bit</TD>
620 
            <TD width="82" height="30">5'h0</TD>
621 
            <TD colspan="4">16bit</TD>
622 
          </TR>
623 
        </TBODY>
624 
      </TABLE>
625 
 
626 
 
627 
    </TR>
628 
  </TBODY>
629 
</TABLE>
630 
<H3>BLTZ -- <I>Branch on less than zero</I></H3>
631 
<TABLE border=1>
632 
<TBODY>
633 
<TR>
634 
<TD>Description:
635 
 
636 
 
637 
      <TD>Branches if the register is less than zero
638 
 
639 
 
640 
 
641 
 
642 
    <TR>
643 
<TD>Operation:
644 
 
645 
 
646 
      <TD>if $s &lt; 0 PC+=imm &lt;&lt; 2;
647 
 
648 
 
649 
 
650 
    <TR>
651 
<TD>Syntax:
652 
 
653 
 
654 
      <TD>bltz $s, imm
655 
 
656 
 
657 
 
658 
    <TR>
659 
<TD>Encoding:
660 
 
661 
 
662 
      <TD>
663 
      <TABLE border="1" width="507">
664 
        <TBODY>
665 
          <TR>
666 
            <TD width="93" height="35">OPCODE</TD>
667 
            <TD width="25" height="35">Source</TD>
668 
            <TD width="82" height="35">Target</TD>
669 
            <TD colspan="4">Immediate</TD>
670 
          </TR>
671 
          <TR>
672 
            <TD width="93" height="30"><CODE>6'b00001</CODE></TD>
673 
            <TD width="25" height="30">5bit</TD>
674 
            <TD width="82" height="30">5'b00000</TD>
675 
            <TD colspan="4">16bit</TD>
676 
          </TR>
677 
        </TBODY>
678 
      </TABLE>
679 
 
680 
 
681 
    </TR>
682 
  </TBODY>
683 
</TABLE>
684 
<H3><FONT color="#ff0000">BLTZAL -- Branch on less than zero and link</FONT></H3>
685 
<TABLE border=1>
686 
<TBODY>
687 
<TR>
688 
<TD>Description:
689 
 
690 
 
691 
      <TD>Branches if the register is less than zero and saves the return address in
692 
$31
693 
 
694 
 
695 
 
696 
 
697 
    <TR>
698 
<TD>Operation:
699 
 
700 
 
701 
      <TD>if $s &lt; 0 $31 = PC + 8 ; PC+=imm &lt;&lt; 2;
702 
 
703 
 
704 
 
705 
    <TR>
706 
<TD>Syntax:
707 
 
708 
 
709 
      <TD>bltzal $s, imm
710 
 
711 
 
712 
 
713 
    <TR>
714 
<TD>Encoding:
715 
 
716 
 
717 
      <TD>
718 
      <TABLE border="1" width="507">
719 
        <TBODY>
720 
          <TR>
721 
            <TD width="93" height="35">OPCODE</TD>
722 
            <TD width="25" height="35">Source</TD>
723 
            <TD width="82" height="35">Target</TD>
724 
            <TD colspan="4">Immediate</TD>
725 
          </TR>
726 
          <TR>
727 
            <TD width="93" height="30"><CODE>6'b000001</CODE></TD>
728 
            <TD width="25" height="30">5bit</TD>
729 
            <TD width="82" height="30">5'b10000</TD>
730 
            <TD colspan="4">16bit</TD>
731 
          </TR>
732 
        </TBODY>
733 
      </TABLE>
734 
 
735 
 
736 
    </TR>
737 
  </TBODY>
738 
</TABLE>
739 
<H3>BNE -- <I>Branch on not equal</I></H3>
740 
<TABLE border=1>
741 
<TBODY>
742 
<TR>
743 
<TD>Description:
744 
 
745 
 
746 
      <TD>Branches if the two registers are not equal
747 
 
748 
 
749 
 
750 
 
751 
    <TR>
752 
<TD>Operation:
753 
 
754 
 
755 
      <TD>if $s != $t PC+=imm &lt;&lt; 2;
756 
 
757 
 
758 
 
759 
    <TR>
760 
<TD>Syntax:
761 
 
762 
 
763 
      <TD>bne $s, $t, imm
764 
 
765 
 
766 
 
767 
    <TR>
768 
<TD>Encoding:
769 
 
770 
 
771 
      <TD>
772 
      <TABLE border="1" width="507">
773 
        <TBODY>
774 
          <TR>
775 
            <TD width="93" height="35">OPCODE</TD>
776 
            <TD width="25" height="35">Source</TD>
777 
            <TD width="82" height="35">Target</TD>
778 
            <TD colspan="4">Immediate</TD>
779 
          </TR>
780 
          <TR>
781 
            <TD width="93" height="30"><CODE>6'b000101</CODE></TD>
782 
            <TD width="25" height="30">5bit</TD>
783 
            <TD width="82" height="30">5'h0</TD>
784 
            <TD colspan="4">16bit</TD>
785 
          </TR>
786 
        </TBODY>
787 
      </TABLE>
788 
 
789 
 
790 
    </TR>
791 
  </TBODY>
792 
</TABLE>
793 
<H3><FONT color="#ff0000">Break -- Break</FONT> </H3>
794 
<TABLE border=1>
795 
<TBODY>
796 
<TR>
797 
<TD>Description:
798 
 
799 
 
800 
 
801 
      <TD>Generates break point.
802 
 
803 
 
804 
 
805 
    <TR>
806 
<TD>Operation:
807 
 
808 
 
809 
 
810 
      <TD>
811 
 
812 
 
813 
 
814 
 
815 
 
816 
    <TR>
817 
<TD>Syntax:
818 
 
819 
 
820 
 
821 
      <TD>break
822 
 
823 
 
824 
 
825 
    <TR>
826 
<TD>Encoding:
827 
 
828 
 
829 
 
830 
      <TD>
831 
      <TABLE border="1" width="476">
832 
        <TBODY>
833 
          <TR>
834 
            <TD width="98" height="42">OPCODE</TD>
835 
            <TD width="32" height="42">Source</TD>
836 
            <TD width="82" height="42">Target</TD>
837 
            <TD width="62" height="42">Destination</TD>
838 
            <TD width="134" height="42">Shift</TD>
839 
            <TD height="42">Function</TD>
840 
          </TR>
841 
          <TR>
842 
            <TD width="98" height="25">6fbOOOOOO</TD>
843 
            <TD width="32" height="25">?????</TD>
844 
            <TD width="82" height="25">?????</TD>
845 
            <TD width="62" height="25">?????</TD>
846 
            <TD width="134" height="25">?????</TD>
847 
            <TD height="25">6'b001101</TD>
848 
          </TR>
849 
        </TBODY>
850 
      </TABLE>
851 
 
852 
 
853 
    </TR>
854 
  </TBODY>
855 
</TABLE>
856 
<P><BR>
857 
<BR>
858 
</P>
859 
<H3>DIV -- <I>Divide</I></H3>
860 
<TABLE border="1" width="597" height="167">
861 
<TBODY>
862 
<TR>
863 
<TD>Description:
864 
 
865 
 
866 
      <TD>Divides $s by $t and stores the quotient in $LO and the remainder in $HI
867 
 
868 
 
869 
 
870 
 
871 
    <TR>
872 
<TD>Operation:
873 
 
874 
 
875 
      <TD>$LO = $s / $t; $HI = $s % $t;
876 
 
877 
 
878 
 
879 
    <TR>
880 
<TD>Syntax:
881 
 
882 
 
883 
      <TD>div $s, $t
884 
 
885 
 
886 
 
887 
 
888 
    <TR>
889 
<TD>Encoding:
890 
 
891 
 
892 
      <TD>
893 
      <TABLE border="1" width="515">
894 
        <TBODY>
895 
          <TR>
896 
            <TD width="99" height="25">OPCODE</TD>
897 
            <TD width="30" height="25">Source</TD>
898 
            <TD width="82" height="25">Target</TD>
899 
            <TD width="62" height="25">Destination</TD>
900 
            <TD width="134" height="25">Shift</TD>
901 
            <TD width="115" height="25">Function</TD>
902 
          </TR>
903 
          <TR>
904 
            <TD width="99" height="42">6fbOOOOOO</TD>
905 
            <TD width="30" height="42">5bit</TD>
906 
            <TD width="82" height="42">5bit</TD>
907 
            <TD width="62" height="42">5'h0</TD>
908 
            <TD width="134" height="42">5'h0</TD>
909 
            <TD width="115" height="42">6'b011010</TD>
910 
          </TR>
911 
        </TBODY>
912 
      </TABLE>
913 
 
914 
 
915 
    </TR>
916 
  </TBODY>
917 
</TABLE>
918 
<H3>DIVU -- <I>Divide unsigned</I></H3>
919 
<TABLE border="1" width="615">
920 
<TBODY>
921 
<TR>
922 
<TD>Description:
923 
 
924 
 
925 
      <TD>Divides $s by $t and stores the quotient in $LO and the remainder in $HI
926 
 
927 
 
928 
 
929 
 
930 
    <TR>
931 
<TD>Operation:
932 
 
933 
 
934 
      <TD>$LO = $s / $t; $HI = $s % $t;
935 
 
936 
 
937 
 
938 
    <TR>
939 
<TD>Syntax:
940 
 
941 
 
942 
      <TD>divu $s, $t
943 
 
944 
 
945 
 
946 
 
947 
    <TR>
948 
<TD>Encoding:
949 
 
950 
 
951 
      <TD>
952 
      <TABLE border="1" width="524">
953 
        <TBODY>
954 
          <TR>
955 
            <TD width="100" height="39">OPCODE</TD>
956 
            <TD width="31" height="39">Source</TD>
957 
            <TD width="52" height="39">Target</TD>
958 
            <TD width="62" height="39">Destination</TD>
959 
            <TD width="134" height="39">Shift</TD>
960 
            <TD width="94" height="39">Function</TD>
961 
          </TR>
962 
          <TR>
963 
            <TD width="100" height="32">6fbOOOOOO</TD>
964 
            <TD width="31" height="32">5bit</TD>
965 
            <TD width="52" height="32">5bit</TD>
966 
            <TD width="62" height="32">5'h0</TD>
967 
            <TD width="134" height="32">5'h0</TD>
968 
            <TD width="94" height="32">6'b011011</TD>
969 
          </TR>
970 
        </TBODY>
971 
      </TABLE>
972 
 
973 
 
974 
    </TR>
975 
  </TBODY>
976 
</TABLE>
977 
<H3>J -- <I>Jump</I></H3>
978 
<TABLE border=1>
979 
<TBODY>
980 
<TR>
981 
<TD>Description:
982 
 
983 
 
984 
      <TD>Jumps to the calculated address
985 
 
986 
 
987 
 
988 
 
989 
    <TR>
990 
<TD>Operation:
991 
 
992 
 
993 
      <TD>PC = nPC; nPC = (PC &amp; 0xf0000000) | (imm26 &lt;&lt; 2);
994 
 
995 
 
996 
 
997 
    <TR>
998 
<TD>Syntax:
999 
 
1000 
 
1001 
      <TD>j imm26
1002 
 
1003 
 
1004 
 
1005 
    <TR>
1006 
<TD>Encoding:
1007 
 
1008 
 
1009 
      <TD>
1010 
      <TABLE border="1" width="476">
1011 
        <TBODY>
1012 
          <TR>
1013 
            <TD width="93" height="35">OPCODE</TD>
1014 
            <TD height="35" colspan="5">Immediate</TD>
1015 
          </TR>
1016 
          <TR>
1017 
            <TD width="93" height="30">6'b000010</TD>
1018 
            <TD height="30" width="31" colspan="5">26bit</TD>
1019 
          </TR>
1020 
        </TBODY>
1021 
      </TABLE>
1022 
 
1023 
 
1024 
    </TR>
1025 
  </TBODY>
1026 
</TABLE>
1027 
<H3>JAL -- <I>Jump and link</I></H3>
1028 
<TABLE border=1>
1029 
<TBODY>
1030 
<TR>
1031 
<TD>Description:
1032 
 
1033 
 
1034 
      <TD>Jumps to the calculated address and stores the return address in $31
1035 
 
1036 
 
1037 
 
1038 
 
1039 
    <TR>
1040 
<TD>Operation:
1041 
 
1042 
 
1043 
      <TD>$31 = PC + 8 ; PC = nPC; nPC = (PC &amp; 0xf0000000) | (imm26 &lt;&lt;
1044 
      2);
1045 
 
1046 
 
1047 
 
1048 
    <TR>
1049 
<TD>Syntax:
1050 
 
1051 
 
1052 
      <TD>jal imm26
1053 
 
1054 
 
1055 
 
1056 
    <TR>
1057 
<TD>Encoding:
1058 
 
1059 
 
1060 
      <TD>
1061 
      <TABLE border="1" width="476">
1062 
        <TBODY>
1063 
          <TR>
1064 
            <TD width="93" height="35">OPCODE</TD>
1065 
            <TD height="35" colspan="5">Immediate</TD>
1066 
          </TR>
1067 
          <TR>
1068 
            <TD width="93" height="30">6'b000011</TD>
1069 
            <TD height="30" width="31" colspan="5">26bit</TD>
1070 
          </TR>
1071 
        </TBODY>
1072 
      </TABLE>
1073 
 
1074 
 
1075 
    </TR>
1076 
  </TBODY>
1077 
</TABLE>
1078 
<H3>JALR -- <I>Jump and link Register</I></H3>
1079 
<TABLE border=1>
1080 
<TBODY>
1081 
<TR>
1082 
<TD>Description:
1083 
 
1084 
 
1085 
 
1086 
      <TD>Jump to the address contained in register $s and stores the return address
1087 
      in $d
1088 
 
1089 
 
1090 
 
1091 
    <TR>
1092 
<TD>Operation:
1093 
 
1094 
 
1095 
 
1096 
      <TD>$d = PC + 8 ; PC = $s
1097 
 
1098 
 
1099 
 
1100 
    <TR>
1101 
<TD>Syntax:
1102 
 
1103 
 
1104 
 
1105 
      <TD>jalr $d,$s
1106 
 
1107 
 
1108 
 
1109 
    <TR>
1110 
<TD>Encoding:
1111 
 
1112 
 
1113 
 
1114 
      <TD>
1115 
      <TABLE border="1" width="524">
1116 
        <TBODY>
1117 
          <TR>
1118 
            <TD width="100" height="39">OPCODE</TD>
1119 
            <TD width="31" height="39">Source</TD>
1120 
            <TD width="52" height="39">Target</TD>
1121 
            <TD width="62" height="39">Destination</TD>
1122 
            <TD width="134" height="39">Shift</TD>
1123 
            <TD width="94" height="39">Function</TD>
1124 
          </TR>
1125 
          <TR>
1126 
            <TD width="100" height="32">6fbOOOOOO</TD>
1127 
            <TD width="31" height="32">5bit</TD>
1128 
            <TD width="52" height="32">5'h0</TD>
1129 
            <TD width="62" height="32">5bit</TD>
1130 
            <TD width="134" height="32">5'h0</TD>
1131 
            <TD width="94" height="32">6'b001001</TD>
1132 
          </TR>
1133 
        </TBODY>
1134 
      </TABLE>
1135 
 
1136 
 
1137 
    </TR>
1138 
  </TBODY>
1139 
</TABLE>
1140 
<H3>JR -- <I>Jump register</I></H3>
1141 
<TABLE border=1>
1142 
<TBODY>
1143 
<TR>
1144 
<TD>Description:
1145 
 
1146 
 
1147 
      <TD>Jump to the address contained in register $s
1148 
 
1149 
 
1150 
 
1151 
    <TR>
1152 
<TD>Operation:
1153 
 
1154 
 
1155 
      <TD>PC = nPC; nPC = $s;
1156 
 
1157 
 
1158 
 
1159 
 
1160 
    <TR>
1161 
<TD>Syntax:
1162 
 
1163 
 
1164 
      <TD>jr $s
1165 
 
1166 
 
1167 
 
1168 
 
1169 
    <TR>
1170 
<TD>Encoding:
1171 
 
1172 
 
1173 
      <TD>
1174 
      <TABLE border="1" width="524">
1175 
        <TBODY>
1176 
          <TR>
1177 
            <TD width="100" height="39">OPCODE</TD>
1178 
            <TD width="31" height="39">Source</TD>
1179 
            <TD width="52" height="39">Target</TD>
1180 
            <TD width="62" height="39">Destination</TD>
1181 
            <TD width="134" height="39">Shift</TD>
1182 
            <TD width="94" height="39">Function</TD>
1183 
          </TR>
1184 
          <TR>
1185 
            <TD width="100" height="32">6fbOOOOOO</TD>
1186 
            <TD width="31" height="32">5bit</TD>
1187 
            <TD width="52" height="32">5'h0</TD>
1188 
            <TD width="62" height="32">5'h0</TD>
1189 
            <TD width="134" height="32">5'h0</TD>
1190 
            <TD width="94" height="32">6'b001000</TD>
1191 
          </TR>
1192 
        </TBODY>
1193 
      </TABLE>
1194 
 
1195 
 
1196 
    </TR>
1197 
  </TBODY>
1198 
</TABLE>
1199 
<H3>LB -- <I>Load byte</I></H3>
1200 
<TABLE border=1>
1201 
<TBODY>
1202 
<TR>
1203 
<TD>Description:
1204 
 
1205 
 
1206 
      <TD>A signed extented byte is loaded into a register from the specified address.
1207 
 
1208 
 
1209 
 
1210 
    <TR>
1211 
<TD>Operation:
1212 
 
1213 
 
1214 
      <TD>$t = MEM[$s + imm]; ;
1215 
 
1216 
 
1217 
 
1218 
    <TR>
1219 
<TD>Syntax:
1220 
 
1221 
 
1222 
      <TD>lb $t, imm($s)
1223 
 
1224 
 
1225 
 
1226 
    <TR>
1227 
<TD>Encoding:
1228 
 
1229 
 
1230 
      <TD>
1231 
      <TABLE border="1" width="507">
1232 
        <TBODY>
1233 
          <TR>
1234 
            <TD width="93" height="35">OPCODE</TD>
1235 
            <TD width="25" height="35">Source</TD>
1236 
            <TD width="82" height="35">Target</TD>
1237 
            <TD colspan="4">Immediate</TD>
1238 
          </TR>
1239 
          <TR>
1240 
            <TD width="93" height="30"><CODE>6'b100000</CODE></TD>
1241 
            <TD width="25" height="30">5bit</TD>
1242 
            <TD width="82" height="30">5bit</TD>
1243 
            <TD colspan="4">16bit</TD>
1244 
          </TR>
1245 
        </TBODY>
1246 
      </TABLE>
1247 
 
1248 
 
1249 
    </TR>
1250 
  </TBODY>
1251 
</TABLE>
1252 
<H3>LBU -- <I>Load byte unsigned</I></H3>
1253 
<TABLE border=1>
1254 
<TBODY>
1255 
<TR>
1256 
<TD>Description:
1257 
 
1258 
 
1259 
 
1260 
      <TD>A unsigned extented byte is loaded into a register from the specified address.
1261 
 
1262 
 
1263 
 
1264 
    <TR>
1265 
<TD>Operation:
1266 
 
1267 
 
1268 
 
1269 
      <TD>$t = MEM[$s + imm]; ;
1270 
 
1271 
 
1272 
 
1273 
 
1274 
 
1275 
    <TR>
1276 
<TD>Syntax:
1277 
 
1278 
 
1279 
 
1280 
      <TD>lbu $t, imm($s)
1281 
 
1282 
 
1283 
 
1284 
    <TR>
1285 
<TD>Encoding:
1286 
 
1287 
 
1288 
 
1289 
      <TD>
1290 
      <TABLE border="1" width="507">
1291 
        <TBODY>
1292 
          <TR>
1293 
            <TD width="93" height="35">OPCODE</TD>
1294 
            <TD width="25" height="35">Source</TD>
1295 
            <TD width="82" height="35">Target</TD>
1296 
            <TD colspan="4">Immediate</TD>
1297 
          </TR>
1298 
          <TR>
1299 
            <TD width="93" height="30"><CODE>6'b100100</CODE></TD>
1300 
            <TD width="25" height="30">5bit</TD>
1301 
            <TD width="82" height="30">5bit</TD>
1302 
            <TD colspan="4">16bit</TD>
1303 
          </TR>
1304 
        </TBODY>
1305 
      </TABLE>
1306 
 
1307 
 
1308 
    </TR>
1309 
  </TBODY>
1310 
</TABLE>
1311 
<P><BR>
1312 
</P>
1313 
<H3>LH -- <I>Load Half</I></H3>
1314 
<TABLE border=1>
1315 
<TBODY>
1316 
<TR>
1317 
<TD>Description:
1318 
 
1319 
 
1320 
 
1321 
      <TD>A signed extented half word is loaded into a register from the specified
1322 
      address.
1323 
 
1324 
 
1325 
 
1326 
    <TR>
1327 
<TD>Operation:
1328 
 
1329 
 
1330 
 
1331 
      <TD>$t = MEM[$s + imm]; ;
1332 
 
1333 
 
1334 
 
1335 
 
1336 
 
1337 
    <TR>
1338 
<TD>Syntax:
1339 
 
1340 
 
1341 
 
1342 
      <TD>lh $t, imm($s)
1343 
 
1344 
 
1345 
 
1346 
    <TR>
1347 
<TD>Encoding:
1348 
 
1349 
 
1350 
 
1351 
      <TD>
1352 
      <TABLE border="1" width="507">
1353 
        <TBODY>
1354 
          <TR>
1355 
            <TD width="93" height="35">OPCODE</TD>
1356 
            <TD width="25" height="35">Source</TD>
1357 
            <TD width="82" height="35">Target</TD>
1358 
            <TD colspan="4">Immediate</TD>
1359 
          </TR>
1360 
          <TR>
1361 
            <TD width="93" height="30"><CODE>6'b100001</CODE></TD>
1362 
            <TD width="25" height="30">5bit</TD>
1363 
            <TD width="82" height="30">5bit</TD>
1364 
            <TD colspan="4">16bit</TD>
1365 
          </TR>
1366 
        </TBODY>
1367 
      </TABLE>
1368 
 
1369 
 
1370 
    </TR>
1371 
  </TBODY>
1372 
</TABLE>
1373 
<P><BR>
1374 
</P>
1375 
<H3>LHU -- <I>Load Half unsigned</I></H3>
1376 
<TABLE border=1>
1377 
<TBODY>
1378 
<TR>
1379 
<TD>Description:
1380 
 
1381 
 
1382 
 
1383 
 
1384 
      <TD>A byte is loaded into a register from the specified address.
1385 
 
1386 
 
1387 
 
1388 
 
1389 
 
1390 
 
1391 
 
1392 
 
1393 
    <TR>
1394 
<TD>Operation:
1395 
 
1396 
 
1397 
 
1398 
 
1399 
      <TD>$t = MEM[$s + imm]; ;
1400 
 
1401 
 
1402 
 
1403 
 
1404 
 
1405 
 
1406 
 
1407 
    <TR>
1408 
<TD>Syntax:
1409 
 
1410 
 
1411 
 
1412 
 
1413 
      <TD>lhu $t, imm($s)
1414 
 
1415 
 
1416 
 
1417 
    <TR>
1418 
<TD>Encoding:
1419 
 
1420 
 
1421 
 
1422 
 
1423 
      <TD>
1424 
      <TABLE border="1" width="507">
1425 
        <TBODY>
1426 
          <TR>
1427 
            <TD width="93" height="35">OPCODE</TD>
1428 
            <TD width="25" height="35">Source</TD>
1429 
            <TD width="82" height="35">Target</TD>
1430 
            <TD colspan="4">Immediate</TD>
1431 
          </TR>
1432 
          <TR>
1433 
            <TD width="93" height="30"><CODE>6'b100101</CODE></TD>
1434 
            <TD width="25" height="30">5bit</TD>
1435 
            <TD width="82" height="30">5bit</TD>
1436 
            <TD colspan="4">16bit</TD>
1437 
          </TR>
1438 
        </TBODY>
1439 
      </TABLE>
1440 
 
1441 
 
1442 
    </TR>
1443 
  </TBODY>
1444 
</TABLE>
1445 
<P><BR>
1446 
</P>
1447 
<H3>LUI -- <I>Load upper immediate</I></H3>
1448 
<TABLE border=1>
1449 
<TBODY>
1450 
<TR>
1451 
<TD>Description:
1452 
 
1453 
 
1454 
      <TD>The immediate value is shifted left 16 bits and stored in the register. The
1455 
lower 16 bits are zeroes.
1456 
 
1457 
 
1458 
 
1459 
 
1460 
    <TR>
1461 
<TD>Operation:
1462 
 
1463 
 
1464 
      <TD>$t = (imm &lt;&lt; 16);
1465 
 
1466 
 
1467 
 
1468 
    <TR>
1469 
<TD>Syntax:
1470 
 
1471 
 
1472 
      <TD>lui $t, imm
1473 
 
1474 
 
1475 
 
1476 
 
1477 
    <TR>
1478 
<TD>Encoding:
1479 
 
1480 
 
1481 
      <TD>
1482 
      <TABLE border="1" width="634">
1483 
        <TBODY>
1484 
          <TR>
1485 
            <TD width="93" height="35">OPCODE</TD>
1486 
            <TD width="25" height="35">Source</TD>
1487 
            <TD width="82" height="35">Target</TD>
1488 
            <TD colspan="4">Immediate</TD>
1489 
          </TR>
1490 
          <TR>
1491 
            <TD width="93" height="30"><CODE>6'b001111</CODE></TD>
1492 
            <TD width="25" height="30">?????</TD>
1493 
            <TD width="82" height="30">5bit</TD>
1494 
            <TD colspan="4">16bit</TD>
1495 
          </TR>
1496 
        </TBODY>
1497 
      </TABLE>
1498 
 
1499 
 
1500 
    </TR>
1501 
  </TBODY>
1502 
</TABLE>
1503 
<H3>LW -- <I>Load word</I></H3>
1504 
<TABLE border=1>
1505 
<TBODY>
1506 
<TR>
1507 
<TD>Description:
1508 
 
1509 
 
1510 
      <TD>A word is loaded into a register from the specified address.
1511 
 
1512 
 
1513 
 
1514 
 
1515 
    <TR>
1516 
<TD>Operation:
1517 
 
1518 
 
1519 
      <TD>$t = MEM[$s + imm];
1520 
 
1521 
 
1522 
 
1523 
    <TR>
1524 
<TD>Syntax:
1525 
 
1526 
 
1527 
      <TD>lw $t, imm($s)
1528 
 
1529 
 
1530 
 
1531 
    <TR>
1532 
<TD>Encoding:
1533 
 
1534 
 
1535 
      <TD>
1536 
      <TABLE border="1" width="507">
1537 
        <TBODY>
1538 
          <TR>
1539 
            <TD width="93" height="35">OPCODE</TD>
1540 
            <TD width="25" height="35">Source</TD>
1541 
            <TD width="82" height="35">Target</TD>
1542 
            <TD colspan="4">Immediate</TD>
1543 
          </TR>
1544 
          <TR>
1545 
            <TD width="93" height="30"><CODE>6'b100011</CODE></TD>
1546 
            <TD width="25" height="30">5bit</TD>
1547 
            <TD width="82" height="30">5bit</TD>
1548 
            <TD colspan="4">16bit</TD>
1549 
          </TR>
1550 
        </TBODY>
1551 
      </TABLE>
1552 
 
1553 
 
1554 
    </TR>
1555 
  </TBODY>
1556 
</TABLE>
1557 
<H3>MFHI -- <I>Move from HI</I></H3>
1558 
<TABLE border=1>
1559 
<TBODY>
1560 
<TR>
1561 
<TD>Description:
1562 
 
1563 
 
1564 
      <TD>The contents of register HI are moved to the specified register.
1565 
 
1566 
 
1567 
 
1568 
 
1569 
    <TR>
1570 
<TD>Operation:
1571 
 
1572 
 
1573 
      <TD>$d = $HI;
1574 
 
1575 
 
1576 
 
1577 
    <TR>
1578 
<TD>Syntax:
1579 
 
1580 
 
1581 
      <TD>mfhi $d
1582 
 
1583 
 
1584 
 
1585 
 
1586 
    <TR>
1587 
<TD>Encoding:
1588 
 
1589 
 
1590 
      <TD>
1591 
      <TABLE border="1" width="524">
1592 
        <TBODY>
1593 
          <TR>
1594 
            <TD width="100" height="39">OPCODE</TD>
1595 
            <TD width="31" height="39">Source</TD>
1596 
            <TD width="52" height="39">Target</TD>
1597 
            <TD width="62" height="39">Destination</TD>
1598 
            <TD width="134" height="39">Shift</TD>
1599 
            <TD width="94" height="39">Function</TD>
1600 
          </TR>
1601 
          <TR>
1602 
            <TD width="100" height="32">6fbOOOOOO</TD>
1603 
            <TD width="31" height="32">5'h0</TD>
1604 
            <TD width="52" height="32">5'h0</TD>
1605 
            <TD width="62" height="32">5bit</TD>
1606 
            <TD width="134" height="32">5'h0</TD>
1607 
            <TD width="94" height="32">6'b010000</TD>
1608 
          </TR>
1609 
        </TBODY>
1610 
      </TABLE>
1611 
 
1612 
 
1613 
    </TR>
1614 
  </TBODY>
1615 
</TABLE>
1616 
<H3>MFLO -- <I>Move from LO</I></H3>
1617 
<TABLE border=1>
1618 
<TBODY>
1619 
<TR>
1620 
<TD>Description:
1621 
 
1622 
 
1623 
      <TD>The contents of register LO are moved to the specified register.
1624 
 
1625 
 
1626 
 
1627 
 
1628 
    <TR>
1629 
<TD>Operation:
1630 
 
1631 
 
1632 
      <TD>$d = $LO;
1633 
 
1634 
 
1635 
 
1636 
    <TR>
1637 
<TD>Syntax:
1638 
 
1639 
 
1640 
      <TD>mflo $d
1641 
 
1642 
 
1643 
 
1644 
 
1645 
    <TR>
1646 
<TD>Encoding:
1647 
 
1648 
 
1649 
      <TD>
1650 
      <TABLE border="1" width="524">
1651 
        <TBODY>
1652 
          <TR>
1653 
            <TD width="100" height="39">OPCODE</TD>
1654 
            <TD width="31" height="39">Source</TD>
1655 
            <TD width="52" height="39">Target</TD>
1656 
            <TD width="62" height="39">Destination</TD>
1657 
            <TD width="134" height="39">Shift</TD>
1658 
            <TD width="94" height="39">Function</TD>
1659 
          </TR>
1660 
          <TR>
1661 
            <TD width="100" height="32">6fbOOOOOO</TD>
1662 
            <TD width="31" height="32">5'h0</TD>
1663 
            <TD width="52" height="32">5'h0</TD>
1664 
            <TD width="62" height="32">5bit</TD>
1665 
            <TD width="134" height="32">5'h0</TD>
1666 
            <TD width="94" height="32">6'b010010</TD>
1667 
          </TR>
1668 
        </TBODY>
1669 
      </TABLE>
1670 
 
1671 
 
1672 
    </TR>
1673 
  </TBODY>
1674 
</TABLE>
1675 
<H3><FONT color="#ff0000">MTHI -- Move to HI</FONT></H3>
1676 
<TABLE border=1>
1677 
<TBODY>
1678 
<TR>
1679 
<TD>Description:
1680 
 
1681 
 
1682 
 
1683 
      <TD>The contents of register $s are moved to $HI.
1684 
 
1685 
 
1686 
 
1687 
    <TR>
1688 
<TD>Operation:
1689 
 
1690 
 
1691 
 
1692 
      <TD> $HI=$s;
1693 
 
1694 
 
1695 
 
1696 
    <TR>
1697 
<TD>Syntax:
1698 
 
1699 
 
1700 
 
1701 
      <TD>mthi $s
1702 
 
1703 
 
1704 
 
1705 
    <TR>
1706 
<TD>Encoding:
1707 
 
1708 
 
1709 
 
1710 
      <TD>
1711 
      <TABLE border="1" width="524">
1712 
        <TBODY>
1713 
          <TR>
1714 
            <TD width="100" height="39">OPCODE</TD>
1715 
            <TD width="31" height="39">Source</TD>
1716 
            <TD width="52" height="39">Target</TD>
1717 
            <TD width="62" height="39">Destination</TD>
1718 
            <TD width="134" height="39">Shift</TD>
1719 
            <TD width="94" height="39">Function</TD>
1720 
          </TR>
1721 
          <TR>
1722 
            <TD width="100" height="32">6fbOOOOOO</TD>
1723 
            <TD width="31" height="32">5'bit</TD>
1724 
            <TD width="52" height="32">5'h0</TD>
1725 
            <TD width="62" height="32">5'h0</TD>
1726 
            <TD width="134" height="32">5'h0</TD>
1727 
            <TD width="94" height="32">6'b010001</TD>
1728 
          </TR>
1729 
        </TBODY>
1730 
      </TABLE>
1731 
 
1732 
 
1733 
    </TR>
1734 
  </TBODY>
1735 
</TABLE>
1736 
<H3><FONT color="#ff0000">MTLO -- Move to LO</FONT></H3>
1737 
<TABLE border=1>
1738 
<TBODY>
1739 
<TR>
1740 
<TD>Description:
1741 
 
1742 
 
1743 
 
1744 
 
1745 
      <TD>The contents of register $s are moved to $HI.
1746 
 
1747 
 
1748 
 
1749 
    <TR>
1750 
<TD>Operation:
1751 
 
1752 
 
1753 
 
1754 
 
1755 
      <TD>$LO=$s;
1756 
 
1757 
 
1758 
 
1759 
    <TR>
1760 
<TD>Syntax:
1761 
 
1762 
 
1763 
 
1764 
 
1765 
      <TD>mtlo $s
1766 
 
1767 
 
1768 
 
1769 
    <TR>
1770 
<TD>Encoding:
1771 
 
1772 
 
1773 
 
1774 
 
1775 
      <TD>
1776 
      <TABLE border="1" width="524">
1777 
        <TBODY>
1778 
          <TR>
1779 
            <TD width="100" height="39">OPCODE</TD>
1780 
            <TD width="31" height="39">Source</TD>
1781 
            <TD width="52" height="39">Target</TD>
1782 
            <TD width="62" height="39">Destination</TD>
1783 
            <TD width="134" height="39">Shift</TD>
1784 
            <TD width="94" height="39">Function</TD>
1785 
          </TR>
1786 
          <TR>
1787 
            <TD width="100" height="32">6fbOOOOOO</TD>
1788 
            <TD width="31" height="32">5'bit</TD>
1789 
            <TD width="52" height="32">5'h0</TD>
1790 
            <TD width="62" height="32">5'h0</TD>
1791 
            <TD width="134" height="32">5'h0</TD>
1792 
            <TD width="94" height="32">6'b010011</TD>
1793 
          </TR>
1794 
        </TBODY>
1795 
      </TABLE>
1796 
 
1797 
 
1798 
 
1799 
    </TR>
1800 
  </TBODY>
1801 
</TABLE>
1802 
<P><BR>
1803 
</P>
1804 
<H3>MULT -- <I>Multiply</I></H3>
1805 
<TABLE border=1>
1806 
<TBODY>
1807 
<TR>
1808 
<TD>Description:
1809 
 
1810 
 
1811 
      <TD>Multiplies $s by $t and stores the result in $LO.
1812 
 
1813 
 
1814 
 
1815 
 
1816 
    <TR>
1817 
<TD>Operation:
1818 
 
1819 
 
1820 
      <TD>$LO = $s * $t;
1821 
 
1822 
 
1823 
 
1824 
    <TR>
1825 
<TD>Syntax:
1826 
 
1827 
 
1828 
      <TD>mult $s, $t
1829 
 
1830 
 
1831 
 
1832 
 
1833 
    <TR>
1834 
<TD>Encoding:
1835 
 
1836 
 
1837 
      <TD>
1838 
      <TABLE border="1" width="515">
1839 
        <TBODY>
1840 
          <TR>
1841 
            <TD width="99" height="25">OPCODE</TD>
1842 
            <TD width="30" height="25">Source</TD>
1843 
            <TD width="82" height="25">Target</TD>
1844 
            <TD width="62" height="25">Destination</TD>
1845 
            <TD width="134" height="25">Shift</TD>
1846 
            <TD width="115" height="25">Function</TD>
1847 
          </TR>
1848 
          <TR>
1849 
            <TD width="99" height="42">6fbOOOOOO</TD>
1850 
            <TD width="30" height="42">5bit</TD>
1851 
            <TD width="82" height="42">5bit</TD>
1852 
            <TD width="62" height="42">5'h0</TD>
1853 
            <TD width="134" height="42">5'h0</TD>
1854 
            <TD width="115" height="42">6'b011000</TD>
1855 
          </TR>
1856 
        </TBODY>
1857 
      </TABLE>
1858 
 
1859 
 
1860 
    </TR>
1861 
  </TBODY>
1862 
</TABLE>
1863 
<H3>MULTU -- <I>Multiply unsigned</I></H3>
1864 
<TABLE border=1>
1865 
<TBODY>
1866 
<TR>
1867 
<TD>Description:
1868 
 
1869 
 
1870 
      <TD>Multiplies $s by $t and stores the result in $LO.
1871 
 
1872 
 
1873 
 
1874 
 
1875 
    <TR>
1876 
<TD>Operation:
1877 
 
1878 
 
1879 
      <TD>$LO = $s * $t;
1880 
 
1881 
 
1882 
 
1883 
    <TR>
1884 
<TD>Syntax:
1885 
 
1886 
 
1887 
      <TD>multu $s, $t
1888 
 
1889 
 
1890 
 
1891 
 
1892 
    <TR>
1893 
<TD>Encoding:
1894 
 
1895 
 
1896 
      <TD>
1897 
      <TABLE border="1" width="515">
1898 
        <TBODY>
1899 
          <TR>
1900 
            <TD width="99" height="25">OPCODE</TD>
1901 
            <TD width="30" height="25">Source</TD>
1902 
            <TD width="82" height="25">Target</TD>
1903 
            <TD width="62" height="25">Destination</TD>
1904 
            <TD width="134" height="25">Shift</TD>
1905 
            <TD width="115" height="25">Function</TD>
1906 
          </TR>
1907 
          <TR>
1908 
            <TD width="99" height="42">6fbOOOOOO</TD>
1909 
            <TD width="30" height="42">5bit</TD>
1910 
            <TD width="82" height="42">5bit</TD>
1911 
            <TD width="62" height="42">5'h0</TD>
1912 
            <TD width="134" height="42">5'h0</TD>
1913 
            <TD width="115" height="42">6'b011001</TD>
1914 
          </TR>
1915 
        </TBODY>
1916 
      </TABLE>
1917 
 
1918 
 
1919 
    </TR>
1920 
  </TBODY>
1921 
</TABLE>
1922 
<H3>NOR -- <I>Bitwise nor</I></H3>
1923 
<TABLE border=1>
1924 
<TBODY>
1925 
<TR>
1926 
<TD>Description:
1927 
 
1928 
 
1929 
 
1930 
      <TD>Bitwise logical nors two registers and stores the result in a register
1931 
 
1932 
 
1933 
 
1934 
    <TR>
1935 
<TD>Operation:
1936 
 
1937 
 
1938 
 
1939 
      <TD>$d = ~($s | $t);
1940 
 
1941 
 
1942 
 
1943 
    <TR>
1944 
<TD>Syntax:
1945 
 
1946 
 
1947 
 
1948 
      <TD>nor $d, $s, $t
1949 
 
1950 
 
1951 
 
1952 
    <TR>
1953 
<TD>Encoding:
1954 
 
1955 
 
1956 
 
1957 
      <TD>
1958 
      <TABLE border="1" width="476">
1959 
        <TBODY>
1960 
          <TR>
1961 
            <TD width="98" height="42">OPCODE</TD>
1962 
            <TD width="32" height="42">Source</TD>
1963 
            <TD width="82" height="42">Target</TD>
1964 
            <TD width="62" height="42">Destination</TD>
1965 
            <TD width="134" height="42">Shift</TD>
1966 
            <TD height="42">Function</TD>
1967 
          </TR>
1968 
          <TR>
1969 
            <TD width="98" height="25">6fbOOOOOO</TD>
1970 
            <TD width="32" height="25">5bit</TD>
1971 
            <TD width="82" height="25">5bit</TD>
1972 
            <TD width="62" height="25">5bit</TD>
1973 
            <TD width="134" height="25">5'h0</TD>
1974 
            <TD height="25">6'b100111</TD>
1975 
          </TR>
1976 
        </TBODY>
1977 
      </TABLE>
1978 
 
1979 
 
1980 
 
1981 
    </TR>
1982 
  </TBODY>
1983 
</TABLE>
1984 
<P>
1985 
<BR>
1986 
</P>
1987 
<H3>OR -- <I>Bitwise or</I></H3>
1988 
<TABLE border=1>
1989 
<TBODY>
1990 
<TR>
1991 
<TD>Description:
1992 
 
1993 
 
1994 
      <TD>Bitwise logical ors two registers and stores the result in a register
1995 
 
1996 
 
1997 
 
1998 
 
1999 
    <TR>
2000 
<TD>Operation:
2001 
 
2002 
 
2003 
      <TD>$d = $s | $t;
2004 
 
2005 
 
2006 
 
2007 
    <TR>
2008 
<TD>Syntax:
2009 
 
2010 
 
2011 
      <TD>or $d, $s, $t
2012 
 
2013 
 
2014 
 
2015 
 
2016 
    <TR>
2017 
<TD>Encoding:
2018 
 
2019 
 
2020 
      <TD>
2021 
      <TABLE border="1" width="476">
2022 
        <TBODY>
2023 
          <TR>
2024 
            <TD width="98" height="42">OPCODE</TD>
2025 
            <TD width="32" height="42">Source</TD>
2026 
            <TD width="82" height="42">Target</TD>
2027 
            <TD width="62" height="42">Destination</TD>
2028 
            <TD width="134" height="42">Shift</TD>
2029 
            <TD height="42">Function</TD>
2030 
          </TR>
2031 
          <TR>
2032 
            <TD width="98" height="25">6fbOOOOOO</TD>
2033 
            <TD width="32" height="25">5bit</TD>
2034 
            <TD width="82" height="25">5bit</TD>
2035 
            <TD width="62" height="25">5bit</TD>
2036 
            <TD width="134" height="25">5'h0</TD>
2037 
            <TD height="25">6'b100101</TD>
2038 
          </TR>
2039 
        </TBODY>
2040 
      </TABLE>
2041 
 
2042 
 
2043 
    </TR>
2044 
  </TBODY>
2045 
</TABLE>
2046 
<H3>ORI -- <I>Bitwise or immediate</I></H3>
2047 
<TABLE border=1>
2048 
<TBODY>
2049 
<TR>
2050 
<TD>Description:
2051 
 
2052 
 
2053 
      <TD>Bitwise ors a register and an immediate value and stores the result in a
2054 
register
2055 
 
2056 
 
2057 
 
2058 
 
2059 
    <TR>
2060 
<TD>Operation:
2061 
 
2062 
 
2063 
      <TD>$t = $s | imm;
2064 
 
2065 
 
2066 
 
2067 
    <TR>
2068 
<TD>Syntax:
2069 
 
2070 
 
2071 
      <TD>ori $t, $s, imm
2072 
 
2073 
 
2074 
 
2075 
 
2076 
    <TR>
2077 
<TD>Encoding:
2078 
 
2079 
 
2080 
      <TD>
2081 
      <TABLE border="1" width="507">
2082 
        <TBODY>
2083 
          <TR>
2084 
            <TD width="93" height="34">OPCODE</TD>
2085 
            <TD width="25" height="34">Source</TD>
2086 
            <TD width="82" height="34">Target</TD>
2087 
            <TD colspan="4" width="261" height="34">Immediate</TD>
2088 
          </TR>
2089 
          <TR>
2090 
            <TD width="93" height="31"><CODE>6'b001101</CODE></TD>
2091 
            <TD width="25" height="31">5bit</TD>
2092 
            <TD width="82" height="31">5bit</TD>
2093 
            <TD colspan="4" width="261" height="31">16bit</TD>
2094 
          </TR>
2095 
        </TBODY>
2096 
      </TABLE>
2097 
 
2098 
 
2099 
    </TR>
2100 
  </TBODY>
2101 
</TABLE>
2102 
<H3>SB -- <I>Store byte</I></H3>
2103 
<TABLE border=1>
2104 
<TBODY>
2105 
<TR>
2106 
<TD>Description:
2107 
 
2108 
 
2109 
      <TD>The least significant byte of $t is stored at the specified address.
2110 
 
2111 
 
2112 
 
2113 
 
2114 
    <TR>
2115 
<TD>Operation:
2116 
 
2117 
 
2118 
      <TD>MEM[$s + imm] = (0xff &amp; $t);
2119 
 
2120 
 
2121 
 
2122 
    <TR>
2123 
<TD>Syntax:
2124 
 
2125 
 
2126 
      <TD>sb $t, imm($s)
2127 
 
2128 
 
2129 
 
2130 
    <TR>
2131 
<TD>Encoding:
2132 
 
2133 
 
2134 
      <TD>
2135 
      <TABLE border="1" width="507">
2136 
        <TBODY>
2137 
          <TR>
2138 
            <TD width="93" height="35">OPCODE</TD>
2139 
            <TD width="25" height="35">Source</TD>
2140 
            <TD width="82" height="35">Target</TD>
2141 
            <TD colspan="4">Immediate</TD>
2142 
          </TR>
2143 
          <TR>
2144 
            <TD width="93" height="30"><CODE>6'b101000</CODE></TD>
2145 
            <TD width="25" height="30">5bit</TD>
2146 
            <TD width="82" height="30">5bit</TD>
2147 
            <TD colspan="4">16bit</TD>
2148 
          </TR>
2149 
        </TBODY>
2150 
      </TABLE>
2151 
 
2152 
 
2153 
    </TR>
2154 
  </TBODY>
2155 
</TABLE>
2156 
<H3>SH -- <I>Store Half</I></H3>
2157 
<TABLE border=1>
2158 
<TBODY>
2159 
<TR>
2160 
<TD>Description:
2161 
 
2162 
 
2163 
 
2164 
      <TD>The least significant half word of $t is stored at the specified address.
2165 
 
2166 
 
2167 
 
2168 
    <TR>
2169 
<TD>Operation:
2170 
 
2171 
 
2172 
 
2173 
      <TD>MEM[$s + imm] = (0xffff &amp; $t);
2174 
 
2175 
 
2176 
 
2177 
    <TR>
2178 
<TD>Syntax:
2179 
 
2180 
 
2181 
 
2182 
      <TD>sh $t, imm($s)
2183 
 
2184 
 
2185 
 
2186 
    <TR>
2187 
<TD>Encoding:
2188 
 
2189 
 
2190 
 
2191 
      <TD>
2192 
      <TABLE border="1" width="507">
2193 
        <TBODY>
2194 
          <TR>
2195 
            <TD width="93" height="35">OPCODE</TD>
2196 
            <TD width="25" height="35">Source</TD>
2197 
            <TD width="82" height="35">Target</TD>
2198 
            <TD colspan="4">Immediate</TD>
2199 
          </TR>
2200 
          <TR>
2201 
            <TD width="93" height="30"><CODE>6'b101001</CODE></TD>
2202 
            <TD width="25" height="30">5bit</TD>
2203 
            <TD width="82" height="30">5bit</TD>
2204 
            <TD colspan="4">16bit</TD>
2205 
          </TR>
2206 
        </TBODY>
2207 
      </TABLE>
2208 
 
2209 
 
2210 
    </TR>
2211 
  </TBODY>
2212 
</TABLE>
2213 
<P><BR>
2214 
</P>
2215 
<H3>SLL -- <I>Shift left logical </I></H3>
2216 
<TABLE border=1>
2217 
<TBODY>
2218 
<TR>
2219 
<TD>Description:
2220 
 
2221 
 
2222 
      <TD>Shifts a register value left by the shift amount listed in the instruction
2223 
and places the result in a third register. Zeroes are shifted in.
2224 
 
2225 
 
2226 
 
2227 
 
2228 
    <TR>
2229 
<TD>Operation:
2230 
 
2231 
 
2232 
      <TD>$d = $t &lt;&lt; h;
2233 
 
2234 
 
2235 
 
2236 
    <TR>
2237 
<TD>Syntax:
2238 
 
2239 
 
2240 
      <TD>sll $d, $t, h
2241 
 
2242 
 
2243 
 
2244 
 
2245 
    <TR>
2246 
<TD>Encoding:
2247 
 
2248 
 
2249 
      <TD>
2250 
      <TABLE border="1" width="779">
2251 
        <TBODY>
2252 
          <TR>
2253 
            <TD width="98" height="38">OPCODE</TD>
2254 
            <TD width="32" height="38">Source</TD>
2255 
            <TD width="82" height="38">Target</TD>
2256 
            <TD width="62" height="38">Destination</TD>
2257 
            <TD width="134" height="38">Shift</TD>
2258 
            <TD width="388" height="38">Function</TD>
2259 
          </TR>
2260 
          <TR>
2261 
            <TD width="98" height="36">6fbOOOOOO</TD>
2262 
            <TD width="32" height="36">5bit</TD>
2263 
            <TD width="82" height="36">5bit</TD>
2264 
            <TD width="62" height="36">5bit</TD>
2265 
            <TD width="134" height="36">h</TD>
2266 
            <TD width="388" height="36">6'b000000</TD>
2267 
          </TR>
2268 
        </TBODY>
2269 
      </TABLE>
2270 
 
2271 
 
2272 
    </TR>
2273 
  </TBODY>
2274 
</TABLE>
2275 
<H3>SLLV -- <I>Shift left logical variable</I></H3>
2276 
<TABLE border=1>
2277 
<TBODY>
2278 
<TR>
2279 
<TD>Description:
2280 
 
2281 
 
2282 
      <TD>Shifts a register value left by the value in a second register and places
2283 
the result in a third register. Zeroes are shifted in.
2284 
 
2285 
 
2286 
 
2287 
 
2288 
    <TR>
2289 
<TD>Operation:
2290 
 
2291 
 
2292 
      <TD>$d = $t &lt;&lt; $s;
2293 
 
2294 
 
2295 
 
2296 
    <TR>
2297 
<TD>Syntax:
2298 
 
2299 
 
2300 
      <TD>sllv $d, $t, $s
2301 
 
2302 
 
2303 
 
2304 
 
2305 
    <TR>
2306 
<TD>Encoding:
2307 
 
2308 
 
2309 
      <TD>
2310 
      <TABLE border="1" width="775">
2311 
        <TBODY>
2312 
          <TR>
2313 
            <TD width="98" height="37">OPCODE</TD>
2314 
            <TD width="32" height="37">Source</TD>
2315 
            <TD width="82" height="37">Target</TD>
2316 
            <TD width="62" height="37">Destination</TD>
2317 
            <TD width="134" height="37">Shift</TD>
2318 
            <TD width="415" height="37">Function</TD>
2319 
          </TR>
2320 
          <TR>
2321 
            <TD width="98" height="37">6fbOOOOOO</TD>
2322 
            <TD width="32" height="37">5bit</TD>
2323 
            <TD width="82" height="37">5bit</TD>
2324 
            <TD width="62" height="37">5bit</TD>
2325 
            <TD width="134" height="37">?????</TD>
2326 
            <TD width="415" height="37">6'b000100</TD>
2327 
          </TR>
2328 
        </TBODY>
2329 
      </TABLE>
2330 
 
2331 
 
2332 
    </TR>
2333 
  </TBODY>
2334 
</TABLE>
2335 
<H3>SLT -- <I>Set on less than (signed)</I></H3>
2336 
<TABLE border=1>
2337 
<TBODY>
2338 
<TR>
2339 
<TD>Description:
2340 
 
2341 
 
2342 
      <TD>If $s is less than $t, $d is set to one. It gets zero otherwise.
2343 
 
2344 
 
2345 
 
2346 
 
2347 
    <TR>
2348 
<TD>Operation:
2349 
 
2350 
 
2351 
      <TD>if $s &lt; $t $d = 1;  else $d = 0;
2352 
 
2353 
 
2354 
 
2355 
    <TR>
2356 
<TD>Syntax:
2357 
 
2358 
 
2359 
      <TD>slt $d, $s, $t
2360 
 
2361 
 
2362 
 
2363 
 
2364 
    <TR>
2365 
<TD>Encoding:
2366 
 
2367 
 
2368 
      <TD>
2369 
      <TABLE border="1" width="476">
2370 
        <TBODY>
2371 
          <TR>
2372 
            <TD width="98" height="42">OPCODE</TD>
2373 
            <TD width="32" height="42">Source</TD>
2374 
            <TD width="82" height="42">Target</TD>
2375 
            <TD width="62" height="42">Destination</TD>
2376 
            <TD width="134" height="42">Shift</TD>
2377 
            <TD height="42">Function</TD>
2378 
          </TR>
2379 
          <TR>
2380 
            <TD width="98" height="25">6fbOOOOOO</TD>
2381 
            <TD width="32" height="25">5bit</TD>
2382 
            <TD width="82" height="25">5bit</TD>
2383 
            <TD width="62" height="25">5bit</TD>
2384 
            <TD width="134" height="25">5'h0</TD>
2385 
            <TD height="25">6'b101010</TD>
2386 
          </TR>
2387 
        </TBODY>
2388 
      </TABLE>
2389 
 
2390 
 
2391 
    </TR>
2392 
  </TBODY>
2393 
</TABLE>
2394 
<H3>SLTI -- <I>Set on less than immediate (signed)</I></H3>
2395 
<TABLE border=1>
2396 
<TBODY>
2397 
<TR>
2398 
<TD>Description:
2399 
 
2400 
 
2401 
      <TD>If $s is less than immediate, $t is set to one. It gets zero otherwise.
2402 
 
2403 
 
2404 
 
2405 
 
2406 
    <TR>
2407 
<TD>Operation:
2408 
 
2409 
 
2410 
      <TD>if $s &lt; imm $t = 1;  else $t = 0;
2411 
 
2412 
 
2413 
 
2414 
    <TR>
2415 
<TD>Syntax:
2416 
 
2417 
 
2418 
      <TD>slti $t, $s, imm
2419 
 
2420 
 
2421 
 
2422 
 
2423 
    <TR>
2424 
<TD>Encoding:
2425 
 
2426 
 
2427 
      <TD>
2428 
      <TABLE border="1" width="530">
2429 
        <TBODY>
2430 
          <TR>
2431 
            <TD width="93" height="35">OPCODE</TD>
2432 
            <TD width="25" height="35">Source</TD>
2433 
            <TD width="82" height="35">Target</TD>
2434 
            <TD colspan="4">Immediate</TD>
2435 
          </TR>
2436 
          <TR>
2437 
            <TD width="93" height="30"><CODE>6'b001010</CODE></TD>
2438 
            <TD width="25" height="30">5bit</TD>
2439 
            <TD width="82" height="30">5bit</TD>
2440 
            <TD colspan="4">16bit</TD>
2441 
          </TR>
2442 
        </TBODY>
2443 
      </TABLE>
2444 
 
2445 
 
2446 
    </TR>
2447 
  </TBODY>
2448 
</TABLE>
2449 
<H3>SLTIU -- <I>Set on less than immediate unsigned</I></H3>
2450 
<TABLE border=1>
2451 
<TBODY>
2452 
<TR>
2453 
<TD>Description:
2454 
 
2455 
 
2456 
      <TD>If $s is less than the unsigned immediate, $t is set to one. It gets zero
2457 
otherwise.
2458 
 
2459 
 
2460 
 
2461 
 
2462 
    <TR>
2463 
<TD>Operation:
2464 
 
2465 
 
2466 
      <TD>if $s &lt; imm $t = 1;  else $t = 0;
2467 
 
2468 
 
2469 
 
2470 
    <TR>
2471 
<TD>Syntax:
2472 
 
2473 
 
2474 
      <TD>sltiu $t, $s, imm
2475 
 
2476 
 
2477 
 
2478 
 
2479 
    <TR>
2480 
<TD>Encoding:
2481 
 
2482 
 
2483 
      <TD>
2484 
      <TABLE border="1" width="530">
2485 
        <TBODY>
2486 
          <TR>
2487 
            <TD width="93" height="35">OPCODE</TD>
2488 
            <TD width="25" height="35">Source</TD>
2489 
            <TD width="82" height="35">Target</TD>
2490 
            <TD colspan="4">Immediate</TD>
2491 
          </TR>
2492 
          <TR>
2493 
            <TD width="93" height="30"><CODE>6'b001011</CODE></TD>
2494 
            <TD width="25" height="30">5bit</TD>
2495 
            <TD width="82" height="30">5bit</TD>
2496 
            <TD colspan="4">16bit</TD>
2497 
          </TR>
2498 
        </TBODY>
2499 
      </TABLE>
2500 
 
2501 
 
2502 
    </TR>
2503 
  </TBODY>
2504 
</TABLE>
2505 
<H3>SLTU -- <I>Set on less than unsigned</I></H3>
2506 
<TABLE border=1>
2507 
<TBODY>
2508 
<TR>
2509 
<TD>Description:
2510 
 
2511 
 
2512 
      <TD>If $s is less than $t, $d is set to one. It gets zero otherwise.
2513 
 
2514 
 
2515 
 
2516 
 
2517 
    <TR>
2518 
<TD>Operation:
2519 
 
2520 
 
2521 
      <TD>if $s &lt; $t $d = 1;  else $d = 0;
2522 
 
2523 
 
2524 
 
2525 
    <TR>
2526 
<TD>Syntax:
2527 
 
2528 
 
2529 
      <TD>sltu $d, $s, $t
2530 
 
2531 
 
2532 
 
2533 
 
2534 
    <TR>
2535 
<TD>Encoding:
2536 
 
2537 
 
2538 
      <TD>
2539 
      <TABLE border="1" width="476">
2540 
        <TBODY>
2541 
          <TR>
2542 
            <TD width="98" height="42">OPCODE</TD>
2543 
            <TD width="32" height="42">Source</TD>
2544 
            <TD width="82" height="42">Target</TD>
2545 
            <TD width="62" height="42">Destination</TD>
2546 
            <TD width="134" height="42">Shift</TD>
2547 
            <TD height="42">Function</TD>
2548 
          </TR>
2549 
          <TR>
2550 
            <TD width="98" height="25">6fbOOOOOO</TD>
2551 
            <TD width="32" height="25">5bit</TD>
2552 
            <TD width="82" height="25">5bit</TD>
2553 
            <TD width="62" height="25">5bit</TD>
2554 
            <TD width="134" height="25">5'h0</TD>
2555 
            <TD height="25">6'b101011</TD>
2556 
          </TR>
2557 
        </TBODY>
2558 
      </TABLE>
2559 
 
2560 
 
2561 
    </TR>
2562 
  </TBODY>
2563 
</TABLE>
2564 
<H3>SRA -- <I>Shift right arithmetic</I></H3>
2565 
<TABLE border=1>
2566 
<TBODY>
2567 
<TR>
2568 
<TD>Description:
2569 
 
2570 
 
2571 
      <TD>Shifts a register value right by the shift amount (shamt) and places the
2572 
value in the destination register. The sign bit is shifted in.
2573 
 
2574 
 
2575 
 
2576 
 
2577 
    <TR>
2578 
<TD>Operation:
2579 
 
2580 
 
2581 
      <TD>$d = $t &gt;&gt; h;
2582 
 
2583 
 
2584 
 
2585 
    <TR>
2586 
<TD>Syntax:
2587 
 
2588 
 
2589 
      <TD>sra $d, $t, h
2590 
 
2591 
 
2592 
 
2593 
 
2594 
    <TR>
2595 
<TD>Encoding:
2596 
 
2597 
 
2598 
      <TD>
2599 
      <TABLE border="1" width="775">
2600 
        <TBODY>
2601 
          <TR>
2602 
            <TD width="98" height="42">OPCODE</TD>
2603 
            <TD width="32" height="42">Source</TD>
2604 
            <TD width="82" height="42">Target</TD>
2605 
            <TD width="62" height="42">Destination</TD>
2606 
            <TD width="134" height="42">Shift</TD>
2607 
            <TD width="415" height="42">Function</TD>
2608 
          </TR>
2609 
          <TR>
2610 
            <TD width="98" height="32">6fbOOOOOO</TD>
2611 
            <TD width="32" height="32">5bit</TD>
2612 
            <TD width="82" height="32">5bit</TD>
2613 
            <TD width="62" height="32">5bit</TD>
2614 
            <TD width="134" height="32">h</TD>
2615 
            <TD width="415" height="32">6'b000011</TD>
2616 
          </TR>
2617 
        </TBODY>
2618 
      </TABLE>
2619 
 
2620 
 
2621 
    </TR>
2622 
  </TBODY>
2623 
</TABLE>
2624 
<P><BR>
2625 
</P>
2626 
<H3>SRAV -- <I>Shift right arithmatic variable</I></H3>
2627 
<TABLE border=1>
2628 
<TBODY>
2629 
<TR>
2630 
<TD>Description:
2631 
 
2632 
 
2633 
 
2634 
      <TD>Shifts a register value right by the value in a second register and places
2635 
      the result in a third register. the sign bit is shifterd in.
2636 
 
2637 
 
2638 
 
2639 
    <TR>
2640 
<TD>Operation:
2641 
 
2642 
 
2643 
 
2644 
      <TD>$d = $t &gt;&gt; $s;
2645 
 
2646 
 
2647 
 
2648 
    <TR>
2649 
<TD>Syntax:
2650 
 
2651 
 
2652 
 
2653 
      <TD>srav $d, $t, $s
2654 
 
2655 
 
2656 
 
2657 
    <TR>
2658 
<TD>Encoding:
2659 
 
2660 
 
2661 
 
2662 
      <TD>
2663 
      <TABLE border="1" width="775">
2664 
        <TBODY>
2665 
          <TR>
2666 
            <TD width="98" height="37">OPCODE</TD>
2667 
            <TD width="32" height="37">Source</TD>
2668 
            <TD width="82" height="37">Target</TD>
2669 
            <TD width="62" height="37">Destination</TD>
2670 
            <TD width="134" height="37">Shift</TD>
2671 
            <TD width="415" height="37">Function</TD>
2672 
          </TR>
2673 
          <TR>
2674 
            <TD width="98" height="37">6fbOOOOOO</TD>
2675 
            <TD width="32" height="37">5bit</TD>
2676 
            <TD width="82" height="37">5bit</TD>
2677 
            <TD width="62" height="37">5bit</TD>
2678 
            <TD width="134" height="37">?????</TD>
2679 
            <TD width="415" height="37">6'b000111</TD>
2680 
          </TR>
2681 
        </TBODY>
2682 
      </TABLE>
2683 
 
2684 
 
2685 
 
2686 
    </TR>
2687 
  </TBODY>
2688 
</TABLE>
2689 
<P><BR>
2690 
</P>
2691 
<H3>SRL -- <I>Shift right logical</I></H3>
2692 
<TABLE border=1>
2693 
<TBODY>
2694 
<TR>
2695 
<TD>Description:
2696 
 
2697 
 
2698 
      <TD>Shifts a register value right by the shift amount (shamt) and places the
2699 
value in the destination register. Zeroes are shifted in.
2700 
 
2701 
 
2702 
 
2703 
 
2704 
    <TR>
2705 
<TD>Operation:
2706 
 
2707 
 
2708 
      <TD>$d = $t &gt;&gt; h;
2709 
 
2710 
 
2711 
 
2712 
    <TR>
2713 
<TD>Syntax:
2714 
 
2715 
 
2716 
      <TD>srl $d, $t, h
2717 
 
2718 
 
2719 
 
2720 
 
2721 
    <TR>
2722 
<TD>Encoding:
2723 
 
2724 
 
2725 
      <TD>
2726 
      <TABLE border="1" width="476">
2727 
        <TBODY>
2728 
          <TR>
2729 
            <TD width="98" height="42">OPCODE</TD>
2730 
            <TD width="32" height="42">Source</TD>
2731 
            <TD width="82" height="42">Target</TD>
2732 
            <TD width="62" height="42">Destination</TD>
2733 
            <TD width="134" height="42">Shift</TD>
2734 
            <TD height="42">Function</TD>
2735 
          </TR>
2736 
          <TR>
2737 
            <TD width="98" height="25">6fbOOOOOO</TD>
2738 
            <TD width="32" height="25">5bit</TD>
2739 
            <TD width="82" height="25">5bit</TD>
2740 
            <TD width="62" height="25">5bit</TD>
2741 
            <TD width="134" height="25">h</TD>
2742 
            <TD height="25">6'b000010</TD>
2743 
          </TR>
2744 
        </TBODY>
2745 
      </TABLE>
2746 
 
2747 
 
2748 
    </TR>
2749 
  </TBODY>
2750 
</TABLE>
2751 
<H3>SRLV -- <I>Shift right logical variable</I></H3>
2752 
<TABLE border=1>
2753 
<TBODY>
2754 
<TR>
2755 
<TD>Description:
2756 
 
2757 
 
2758 
      <TD>Shifts a register value right by the amount specified in $s and places the
2759 
value in the destination register. Zeroes are shifted in.
2760 
 
2761 
 
2762 
 
2763 
 
2764 
    <TR>
2765 
<TD>Operation:
2766 
 
2767 
 
2768 
      <TD>$d = $t &gt;&gt; $s;
2769 
 
2770 
 
2771 
 
2772 
    <TR>
2773 
<TD>Syntax:
2774 
 
2775 
 
2776 
      <TD>srlv $d, $t, $s
2777 
 
2778 
 
2779 
 
2780 
 
2781 
    <TR>
2782 
<TD>Encoding:
2783 
 
2784 
 
2785 
      <TD>
2786 
      <TABLE border="1" width="476">
2787 
        <TBODY>
2788 
          <TR>
2789 
            <TD width="98" height="42">OPCODE</TD>
2790 
            <TD width="32" height="42">Source</TD>
2791 
            <TD width="82" height="42">Target</TD>
2792 
            <TD width="62" height="42">Destination</TD>
2793 
            <TD width="134" height="42">Shift</TD>
2794 
            <TD height="42">Function</TD>
2795 
          </TR>
2796 
          <TR>
2797 
            <TD width="98" height="25">6fbOOOOOO</TD>
2798 
            <TD width="32" height="25">5bit</TD>
2799 
            <TD width="82" height="25">5bit</TD>
2800 
            <TD width="62" height="25">5bit</TD>
2801 
            <TD width="134" height="25">5'h0</TD>
2802 
            <TD height="25">6'b000110</TD>
2803 
          </TR>
2804 
        </TBODY>
2805 
      </TABLE>
2806 
 
2807 
 
2808 
    </TR>
2809 
  </TBODY>
2810 
</TABLE>
2811 
<H3>SUB -- <I>Subtract</I></H3>
2812 
<TABLE border=1>
2813 
<TBODY>
2814 
<TR>
2815 
<TD>Description:
2816 
 
2817 
 
2818 
      <TD>Subtracts two registers and stores the result in a register<FONT color="#ff0000">(Exception by Overflow)</FONT>
2819 
 
2820 
 
2821 
 
2822 
    <TR>
2823 
<TD>Operation:
2824 
 
2825 
 
2826 
      <TD>$d = $s - $t;
2827 
 
2828 
 
2829 
 
2830 
    <TR>
2831 
<TD>Syntax:
2832 
 
2833 
 
2834 
      <TD>sub $d, $s, $t
2835 
 
2836 
 
2837 
 
2838 
 
2839 
    <TR>
2840 
<TD>Encoding:
2841 
 
2842 
 
2843 
      <TD>
2844 
      <TABLE border="1" width="476">
2845 
        <TBODY>
2846 
          <TR>
2847 
            <TD width="98" height="42">OPCODE</TD>
2848 
            <TD width="32" height="42">Source</TD>
2849 
            <TD width="82" height="42">Target</TD>
2850 
            <TD width="62" height="42">Destination</TD>
2851 
            <TD width="134" height="42">Shift</TD>
2852 
            <TD height="42">Function</TD>
2853 
          </TR>
2854 
          <TR>
2855 
            <TD width="98" height="25">6fbOOOOOO</TD>
2856 
            <TD width="32" height="25">5bit</TD>
2857 
            <TD width="82" height="25">5bit</TD>
2858 
            <TD width="62" height="25">5bit</TD>
2859 
            <TD width="134" height="25">5'h0</TD>
2860 
            <TD height="25">6'b100010</TD>
2861 
          </TR>
2862 
        </TBODY>
2863 
      </TABLE>
2864 
 
2865 
 
2866 
    </TR>
2867 
  </TBODY>
2868 
</TABLE>
2869 
<H3>SUBU -- <I>Subtract unsigned</I></H3>
2870 
<TABLE border=1>
2871 
<TBODY>
2872 
<TR>
2873 
<TD>Description:
2874 
 
2875 
 
2876 
      <TD>Subtracts two registers and stores the result in a register
2877 
 
2878 
 
2879 
 
2880 
 
2881 
    <TR>
2882 
<TD>Operation:
2883 
 
2884 
 
2885 
      <TD>$d = $s - $t;
2886 
 
2887 
 
2888 
 
2889 
    <TR>
2890 
<TD>Syntax:
2891 
 
2892 
 
2893 
      <TD>subu $d, $s, $t
2894 
 
2895 
 
2896 
 
2897 
 
2898 
    <TR>
2899 
<TD>Encoding:
2900 
 
2901 
 
2902 
      <TD>
2903 
      <TABLE border="1" width="476">
2904 
        <TBODY>
2905 
          <TR>
2906 
            <TD width="98" height="42">OPCODE</TD>
2907 
            <TD width="32" height="42">Source</TD>
2908 
            <TD width="82" height="42">Target</TD>
2909 
            <TD width="62" height="42">Destination</TD>
2910 
            <TD width="134" height="42">Shift</TD>
2911 
            <TD height="42">Function</TD>
2912 
          </TR>
2913 
          <TR>
2914 
            <TD width="98" height="25">6fbOOOOOO</TD>
2915 
            <TD width="32" height="25">5bit</TD>
2916 
            <TD width="82" height="25">5bit</TD>
2917 
            <TD width="62" height="25">5bit</TD>
2918 
            <TD width="134" height="25">5'h0</TD>
2919 
            <TD height="25">6'b100011</TD>
2920 
          </TR>
2921 
        </TBODY>
2922 
      </TABLE>
2923 
 
2924 
 
2925 
    </TR>
2926 
  </TBODY>
2927 
</TABLE>
2928 
<H3>SW -- <I>Store word</I></H3>
2929 
<TABLE border=1>
2930 
<TBODY>
2931 
<TR>
2932 
<TD>Description:
2933 
 
2934 
 
2935 
      <TD>The contents of $t is stored at the specified address.
2936 
 
2937 
 
2938 
 
2939 
 
2940 
    <TR>
2941 
<TD>Operation:
2942 
 
2943 
 
2944 
      <TD>MEM[$s + imm] = $t;
2945 
 
2946 
 
2947 
 
2948 
    <TR>
2949 
<TD>Syntax:
2950 
 
2951 
 
2952 
      <TD>sw $t, imm($s)
2953 
 
2954 
 
2955 
 
2956 
    <TR>
2957 
<TD>Encoding:
2958 
 
2959 
 
2960 
      <TD>
2961 
      <TABLE border="1" width="507">
2962 
        <TBODY>
2963 
          <TR>
2964 
            <TD width="93" height="35">OPCODE</TD>
2965 
            <TD width="25" height="35">Source</TD>
2966 
            <TD width="82" height="35">Target</TD>
2967 
            <TD colspan="4">Immediate</TD>
2968 
          </TR>
2969 
          <TR>
2970 
            <TD width="93" height="30"><CODE>6'b101011</CODE></TD>
2971 
            <TD width="25" height="30">5bit</TD>
2972 
            <TD width="82" height="30">5bit</TD>
2973 
            <TD colspan="4">16bit</TD>
2974 
          </TR>
2975 
        </TBODY>
2976 
      </TABLE>
2977 
 
2978 
 
2979 
    </TR>
2980 
  </TBODY>
2981 
</TABLE>
2982 
<H3><FONT color="#ff0000">SYSCALL -- System call</FONT></H3>
2983 
<TABLE border=1>
2984 
<TBODY>
2985 
<TR>
2986 
<TD>Description:
2987 
 
2988 
 
2989 
      <TD>Generates a software interrupt.
2990 
 
2991 
 
2992 
 
2993 
 
2994 
    <TR>
2995 
<TD>Operation:
2996 
 
2997 
 
2998 
      <TD>
2999 
 
3000 
 
3001 
 
3002 
    <TR>
3003 
<TD>Syntax:
3004 
 
3005 
 
3006 
      <TD>syscall
3007 
 
3008 
 
3009 
 
3010 
 
3011 
    <TR>
3012 
<TD>Encoding:
3013 
 
3014 
 
3015 
      <TD>
3016 
      <TABLE border="1" width="476">
3017 
        <TBODY>
3018 
          <TR>
3019 
            <TD width="98" height="42">OPCODE</TD>
3020 
            <TD width="32" height="42">Source</TD>
3021 
            <TD width="82" height="42">Target</TD>
3022 
            <TD width="62" height="42">Destination</TD>
3023 
            <TD width="134" height="42">Shift</TD>
3024 
            <TD height="42">Function</TD>
3025 
          </TR>
3026 
          <TR>
3027 
            <TD width="98" height="25">6fbOOOOOO</TD>
3028 
            <TD width="32" height="25">?????</TD>
3029 
            <TD width="82" height="25">?????</TD>
3030 
            <TD width="62" height="25">?????</TD>
3031 
            <TD width="134" height="25">?????</TD>
3032 
            <TD height="25">6'b001100</TD>
3033 
          </TR>
3034 
        </TBODY>
3035 
      </TABLE>
3036 
 
3037 
 
3038 
    </TR>
3039 
  </TBODY>
3040 
</TABLE>
3041 
<H3>XOR -- <I>Bitwise exclusive or</I></H3>
3042 
<TABLE border=1>
3043 
<TBODY>
3044 
<TR>
3045 
<TD>Description:
3046 
 
3047 
 
3048 
      <TD>Exclusive ors two registers and stores the result in a register
3049 
 
3050 
 
3051 
 
3052 
 
3053 
    <TR>
3054 
<TD>Operation:
3055 
 
3056 
 
3057 
      <TD>$d = $s ^ $t;
3058 
 
3059 
 
3060 
 
3061 
    <TR>
3062 
<TD>Syntax:
3063 
 
3064 
 
3065 
      <TD>xor $d, $s, $t
3066 
 
3067 
 
3068 
 
3069 
 
3070 
    <TR>
3071 
<TD>Encoding:
3072 
 
3073 
 
3074 
      <TD>
3075 
      <TABLE border="1" width="476">
3076 
        <TBODY>
3077 
          <TR>
3078 
            <TD width="98" height="42">OPCODE</TD>
3079 
            <TD width="32" height="42">Source</TD>
3080 
            <TD width="82" height="42">Target</TD>
3081 
            <TD width="62" height="42">Destination</TD>
3082 
            <TD width="134" height="42">Shift</TD>
3083 
            <TD height="42">Function</TD>
3084 
          </TR>
3085 
          <TR>
3086 
            <TD width="98" height="25">6fbOOOOOO</TD>
3087 
            <TD width="32" height="25">5bit</TD>
3088 
            <TD width="82" height="25">5bit</TD>
3089 
            <TD width="62" height="25">5bit</TD>
3090 
            <TD width="134" height="25">?????</TD>
3091 
            <TD height="25">6'b100110</TD>
3092 
          </TR>
3093 
        </TBODY>
3094 
      </TABLE>
3095 
 
3096 
 
3097 
    </TR>
3098 
  </TBODY>
3099 
</TABLE>
3100 
<H3>XORI -- <I>Bitwise exclusive or immediate</I></H3>
3101 
<TABLE border=1>
3102 
<TBODY>
3103 
<TR>
3104 
<TD>Description:
3105 
 
3106 
 
3107 
      <TD>Bitwise exclusive ors a register and an immediate value and stores the
3108 
result in a register
3109 
 
3110 
 
3111 
 
3112 
 
3113 
    <TR>
3114 
<TD>Operation:
3115 
 
3116 
 
3117 
      <TD>$t = $s ^ imm;
3118 
 
3119 
 
3120 
 
3121 
    <TR>
3122 
<TD>Syntax:
3123 
 
3124 
 
3125 
      <TD>xori $t, $s, imm
3126 
 
3127 
 
3128 
 
3129 
 
3130 
    <TR>
3131 
<TD>Encoding:
3132 
 
3133 
 
3134 
      <TD>
3135 
      <TABLE border="1" width="577">
3136 
        <TBODY>
3137 
          <TR>
3138 
            <TD width="93" height="35">OPCODE</TD>
3139 
            <TD width="25" height="35">Source</TD>
3140 
            <TD width="82" height="35">Target</TD>
3141 
            <TD colspan="4">Immediate</TD>
3142 
          </TR>
3143 
          <TR>
3144 
            <TD width="93" height="30"><CODE>6'b001110</CODE></TD>
3145 
            <TD width="25" height="30">5bit</TD>
3146 
            <TD width="82" height="30">5bit</TD>
3147 
            <TD colspan="4">16bit</TD>
3148 
          </TR>
3149 
        </TBODY>
3150 
      </TABLE>
3151 
 
3152 
 
3153 
    </TR>
3154 
  </TBODY>
3155 
</TABLE>
3156 
<P><BR>
3157 
<BR>
3158 
</P>
3159 
</BODY>
3160 
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