关于前端:CCPS310-难点分析

CCPS310 – COMPUTER ORGANIZATION II
LAB 1
ARC, ARC ASSEMBLY, ARC SIMULATOR
Submission instruction: Due Feb 12th @23:00hr
Students may work in groups of 2, and are expected to do the lab together.
Submit solutions in one text file on Brightspace.
Evaluation :Correct completion of the following four programs.
Note: CS Labs: Arc Simulator program is located in the shared drive with path
‘Program Files\ArcTools\ArcTools’. OR Install on your computer from zip file on
brightspace.
!n: The ArcTool requires an added empty line at the bottom of the code to
assemble
PART 1:

1. Please add comment for each line.
   a. Explain what the program intends to do.
   b. Assemble the code by hand.
2. Run the program through the simulator
3. What is the content of %r4 after this program is executed?
   ! Program 1
   ! Hint: op3 for subcc is 010100
   .begin
   .org 2048
   dstart .equ 4000
   ld [a], %r1
   ld [b], %r2
   ld , %r3
   addcc %r2, %r3, %r0
   addcc %r1, %r0, %r4
   subcc %r2, %r4, %r2
   st %r0, [a]
   st %r2, [y]
   jmpl %r15 + 4, %r0
   .org dstart
   a: 15
   b: 54
   c: -29
   y: 0
   .end
   PART 2:
4. Please add comment for each line.
   a. Explain what the program intends to do.
   b. Assemble the code by hand.
5. Run the program through the simulator
6. What is the content of %r3 after this program is executed?
   ! Program 2
   .begin
   .org 2048
   m_start: ld [x], %r1
   ld [y], %r2
   subcc %r1, %r2, %r0
   bne else
   andcc %r1, %r2, %r3
   ba done
   else: orcc %r1, %r2, %r3
   done: st %r3, [a]
   jmpl %r15+4, %r0
   x: 30
   y: 48
   a: 0
   .end
   PART 3:
7. Please add comment for each line.
   a. Explain what the program intends to do.
   b. Assemble the code by hand.
8. Run the program through the simulator
9. What is the content of %r1 after this program is executed?
   ! Program 3
   .begin
   .org 2048
   main: ld [x], %r2
   top: subcc %r1, 4, %r0
   be done
   srl %r2, 1, %r2
   addcc %r1, 1, %r1
   ba top
   done: st %r3, [y]
   jmpl %r15+4, %r0
   .org 3000
   x: 800
   y: 0
   .end
   PART 4:
10. Please add comment for each line.
    a. Explain what the program intends to do.
    b. Assemble the code by hand.
11. Run the program through the simulator
12. What is the content of %r4 after this program is executed?
    ! Program 4
    .begin
    .org 2048
    main: ld [a], %r1
    ld [b], %r2
    ld , %r3
    top: subcc %r4, 3, %r0
    be done
    subcc %r5, %r6, %r0
    bneg else
    orcc %r1, %r2, %r1
    addcc %r6, 1, %r6
    ba bottom
    else: andcc %r1, %r3, %r1
    addcc %r5, 1, %r5
    bottom: addcc %r4, 1, %r4
    ba top
    done: st %r3, [y]
    jmpl %r15+4, %r0
    .org 3000
    a: 0xa0
    b: 0x33
    c: 0x52
    y: 2
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