BF16 tests

[adlr]

Description

First cut of tests for BF16. I would like to get community feedback on these, either in this change or the other supporting changes:

riscv-software-src/riscv-isac#77
riscv-software-src/riscv-ctg#82

Related Issues

NA

Ratified/Unratified Extensions

• Ratified
• Unratified

List Extensions

Zfbfmin, Zvfbfmin Zvfbfwma

https://github.com/riscv/riscv-bfloat16/releases/download/20230629/riscv-bfloat16.pdf

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): < SPECIFY HERE >
• Link to PR in RISCV-ISAC from which the reports were generated : Changes to support BF16 riscv-software-src/riscv-isac#77
• Changelog entry created with a minor patch

Optional Checklist:

• RISCV-V CTG PR link if tests were generated using it : < SPECIFY HERE >
• 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]

Please change this as a pull into the dev branch instead of the main branch to avoid merge issues

[allenjbaum]

Can you explain why you are defining FLREG to be a 64b load for Zfinx? Note that this definition must also work for an RV32_Zfinx which doesn't implement ld, which is RV64 only

[UmerShahidengr]

@adlr are you still working on BF16? I have closed your PR at ctg because of the conflicts with Zfa coverpoints. Please take a look at the coverpoints, also deliver the coverpoints and ACTs in a single PR. Apologies any inconvenience.

[adlr]

Hi Umer, no worries at all! I haven't been working on BF16 for a while and I'm pretty preoccupied with a number of other things. If someone wants to take this over and make the changes, please do!