RSLI register not changing

[Bianca M]

SFU ID:301366608

Github username:biancago

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

Line and file: line 203 part2.c

Expected behavior: return rd = 10 0x0a

Observed behavior: returs rd= 11 0x0b

Question: I have no clue why the actual value says its 0x0b when I checked the register it's 0x0a and even printed it out

[Bianca M]

sorry I meant he rd is 0x0a but the register is still 0xb

[Parmida Vahdatnia]

I can't understand what you're doing in your SRL and SRA, either insert comments in your code so I could go through it or try to implement it with a switch case of if-else statement checking  instruction.rtype.funct7, it will clean up your code and make debugging easier. 

[Bianca M]

 I just wrote comments on my SRAI and SRLI

[Bianca M]

I tried returning rd = 10   but still converts it to 11 ,   i tried returning other values like 26 0x1a and it makes it into 0x1b

[Bianca M]

I've already checked store, load, and every instruction and none of them are causing it... I'm so lost.

[Artun]

I had the same problem with my SRLI. I changed my switch statement to if/else statements for SRLI/SRAI and it's working now.

[Arrvindh Shriraman]

1. Your shifting is bogus. 

Read RISCV_CARD carefully: https://www.cs.sfu.ca/~ashriram/Courses/CS295/assets/notebooks/RISCV/RISCV_CARD.pdf

https://web.cecs.pdx.edu/~harry/riscv/RISCV-Summary.pdf (Page 54)

Note that shift values have to be between 0..31; right now your wont be; I will let you figure out why.

2. Not sure why you need filter; 

3. Switch-case is also appears bogus. If you convert it to if-else it will be easier to spot the bug if any.