Stream: git-wasmtime

Topic: wasmtime / issue #9684 Cranelift: The error message for t...

view this post on Zulip Wasmtime GitHub notifications bot (Nov 26 2024 at 08:20):

abc767234318 opened issue #9684:

I constructed a clif file.

multi_func8.zip

I used the following command to run it.

clif-util run -v multi_func8.clif

And I got the following error message:

cases/multi_func8.clif: Compilation error: Unsupported feature: should be implemented in ISLE: inst = `store.f16x8 notrap aligned little v2, v1`, type = `None`
1 file
Error: 1 failure

I think the error is triggered by the store.f16x8 instruction, but I can't find any store.f16x8 instruction in this clif file.

view this post on Zulip Wasmtime GitHub notifications bot (Nov 26 2024 at 08:54):

bjorn3 commented on issue #9684:

It is possible that the store.f16x8 is introduced by optimizations given that you enabled optimizations using set opt_level=speed.

view this post on Zulip Wasmtime GitHub notifications bot (Nov 26 2024 at 08:59):

abc767234318 commented on issue #9684:

It is possible that the store.f16x8 is introduced by optimizations given that you enabled optimizations using set opt_level=speed.

Is it necessary to adjust the optimization strategy to avoid similar issues from occurring?

view this post on Zulip Wasmtime GitHub notifications bot (Nov 26 2024 at 09:00):

bjorn3 commented on issue #9684:

I would recommend avoiding f16 entirely until Cranelift has proper support for it.

view this post on Zulip Wasmtime GitHub notifications bot (May 06 2025 at 17:20):

alexcrichton closed issue #9684:

I constructed a clif file.

multi_func8.zip

I used the following command to run it.

clif-util run -v multi_func8.clif

And I got the following error message:

cases/multi_func8.clif: Compilation error: Unsupported feature: should be implemented in ISLE: inst = `store.f16x8 notrap aligned little v2, v1`, type = `None`
1 file
Error: 1 failure

I think the error is triggered by the store.f16x8 instruction, but I can't find any store.f16x8 instruction in this clif file.

view this post on Zulip Wasmtime GitHub notifications bot (May 06 2025 at 17:20):

alexcrichton commented on issue #9684:

I'm going to close this as working-as-intended for now as this is generally how unsupported functionality in Cranelift can get surfaced.

Last updated: Dec 13 2025 at 19:03 UTC