Assign 2 - Part 2 - Random Test

[Danial]

SFU ID: 301390696 (danialk)

Github username: danialkhan4

Github: https://github.com/CMPT-295-SFU/assignment-2-danialkhan4

Line and file:  part2.c (line unknown)

Expected behavior: pass all tests

Observed behavior: all tests passed except random

Question:

When running bash ./scripts/localci.sh I get the following error:

### *****python3 part2_tester.py random*****
```
Starting random test
ERROR: instruction 8, register 5. Expected: 0xffffffff, Actual: 0xfffff41f
ERROR: instruction 9, register 10. Expected: 0x00000001, Actual: 0x00000000
ERROR: instruction 10, register 5. Expected: 0x00000000, Actual: 0xfffff41f
ERROR: instruction 12, register 10. Expected: 0x0000000a, Actual: 0x00000015
ERROR: reference trace finished before student trace
random test has failed.

- My output random.trace file is more lines than the reference random.trace

- for instruction 8, the actual value is changing when I redo my test, for example if i run bash again without remaking, I get a different value like 0xfffff41f or sometimes no error

[Danial]

random.trace file at instruction 7, 8, 9

[Arrvindh Shriraman]

PC is broken; you are jumping somewhere in the middle and jumping again. Hard to debug; track down the value of the PC after every instruction.

random is just straight line code so you should just be running instructions in code.

[Danial]

It seems it increments normally for every instruction, after the final instruction I get Illegal ecall number 30

 

It should stop at instruction 14 but continues to instruction 19 

[Arrvindh Shriraman]

Then check the implementation of instructions that write to a0