Stream: git-wasmtime

Topic: wasmtime / PR #4608 Convert `fma`, `valltrue` & `vanytrue...

Wasmtime GitHub notifications bot (Aug 04 2022 at 13:23):

dheaton-arm opened PR #4608 from isle-fma to main:

Ported the existing implementations of the following opcodes to ISLE on
AArch64:

• fma

  • Introduced missing support for fma on vector values, as per the
    docs.

• valltrue

• vanytrue

Also fixed fcmp on scalar values in the interpreter, and enabled
interpreter tests in simd-fma.clif.

This introduces the FMLA machine instruction.

Copyright (c) 2022 Arm Limited

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Wasmtime GitHub notifications bot (Aug 04 2022 at 13:27):

afonso360 submitted PR review.

Wasmtime GitHub notifications bot (Aug 04 2022 at 13:27):

afonso360 created PR review comment:

fma is somewhat broken in the interpreter for the x86_64-pc-windows-gnu target (see #4517 for more details). We have a smaller subset of fma tests for the interpreter in a separate file.

Wasmtime GitHub notifications bot (Aug 04 2022 at 13:30):

afonso360 created PR review comment:

Although it looks like we don't have those problematic inputs in this test file, so the tests will probably pass.

Wasmtime GitHub notifications bot (Aug 04 2022 at 13:30):

afonso360 submitted PR review.

Wasmtime GitHub notifications bot (Aug 04 2022 at 13:49):

afonso360 submitted PR review.

Wasmtime GitHub notifications bot (Aug 04 2022 at 16:47):

cfallin submitted PR review.

Wasmtime GitHub notifications bot (Aug 04 2022 at 16:47):

cfallin submitted PR review.

Wasmtime GitHub notifications bot (Aug 04 2022 at 16:47):

cfallin created PR review comment:

Could we add a comment here (and also on bsl while we're at it) to note that the opcode must only be used with the vec_rrr_inplace constructor?

(Note below on a better approach here by separating the types for safety, but we don't need to do it right away)

Wasmtime GitHub notifications bot (Aug 04 2022 at 16:47):

cfallin created PR review comment:

Hmm, I'm not too happy about the conditional-mod here, but it's pre-existing, so I won't ask you to do anything in this PR. But noting it regardless: it would be better to split the case out to a new enum arm (VecRRRMod?) and then make the sub-opcode enum separate (VecALUOp / VecALUModOp maybe?) for more safety at the type level. (If you want to tackle that in a followup PR, I'd be happy to review!)

Wasmtime GitHub notifications bot (Aug 04 2022 at 16:47):

cfallin created PR review comment:

the src_dst here is actually a pure source, since we move out of it below, right? Could we call it src1 instead for clarity?

Wasmtime GitHub notifications bot (Aug 05 2022 at 09:06):

dheaton-arm updated PR #4608 from isle-fma to main.

Wasmtime GitHub notifications bot (Aug 05 2022 at 16:47):

cfallin merged PR #4608.

Last updated: Dec 23 2024 at 12:05 UTC