Added regenerated tests of divw and remw through riscv_ctg to solve corner case of issue#300

[alitariq4589]

Description

In this PR, I have added the tests for a single corner case of divw and remw which involves dividing the most negative integer by -1 and expects an overflow in result. This corner case is stated in section 9.2 of riscv unprivilege specification.

Related Issues

#300

Ratified/Unratified Extensions

• Ratified
• Unratified

List Extensions

RV64IM

Reference Model Used

• SAIL
• Spike
• Other - < SPECIFY HERE >

Mandatory Checklist:

• All tests are compliant with the test-format spec present in this repo ?
• Ran the new tests on RISCOF with SAIL/Spike as reference model successfully ?
• Ran the new tests on RISCOF in coverage mode
• Link to Google-Drive folder containing the new coverage reports (See this for more info): link
• Link to PR in RISCV-ISAC from which the reports were generated : RISC-V ISA Coverage Generator, version 0.17.0 (Installed from pip)
• Changelog entry created with a minor patch

Optional Checklist:

• RISCV-V CTG PR link if tests were generated using it : Added corner case for dividing most neg number with -1 riscv-software-src/riscv-ctg#65
• Were the tests hand-written/modified ?
• Have you run these on any hard DUT model ? Please specify name and provide link if possible in the description
• If you have modified arch_test.h Please provide a detailed description of the changes in the Description section above.

[allenjbaum]

Ugh - regenerating this entire test means you cannot see where you added this one case.
But: does this also handle the other cases that Stacy identified as missing coverage?

[UmerShahidengr]

Ugh - regenerating this entire test means you cannot see where you added this one case. But: does this also handle the other cases that Stacy identified as missing coverage?

Yes. These tests were generated via updated cgf file which include those missing coverpoints pointed by Stacy.

[alitariq4589]

Mandatory checklist has been completed. Regarding the coverage report, I was having some confusion which file to add in the zip file. So I have zipped complete riscof work folder. This should be good to go now.

[allenjbaum]

I can see the missing case, so this is good to go.