Stream: git-wasmtime

Topic: wasmtime / Issue #1762 Replace InsertLane format with Ter...

view this post on Zulip Wasmtime GitHub notifications bot (May 26 2020 at 21:14):

abrown commented on Issue #1762:

I am also thinking of doing the same for ExtractLane--it's a bit too specific--but that can be a separate PR.

view this post on Zulip Wasmtime GitHub notifications bot (May 26 2020 at 21:40):

github-actions[bot] commented on Issue #1762:

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view this post on Zulip Wasmtime GitHub notifications bot (May 29 2020 at 15:59):

iximeow commented on Issue #1762:

I feel it's important to note here that this is a pretty x86-oriented change - do NEON instructions have similar "select-a-lane-of-the-dest-with-an-immediate" instructions? It seems like the alternative is to have different formats for different place imm8 makes sense in clif IR, which is admittedly not great..

view this post on Zulip Wasmtime GitHub notifications bot (May 29 2020 at 16:12):

iximeow edited a comment on Issue #1762:

I feel it's important to note here that this is a pretty x86-oriented change - ~do NEON instructions have similar "select-a-lane-of-the-dest-with-an-immediate" instructions?~ It seems like the alternative is to have different formats for different place imm8 makes sense in clif IR, which is admittedly not great..

edit: NEON instructions would go through the new backend machinery anyway, so that question isn't so relevant.

I don't want to single-handedly encourage orienting the old backend machinery towards x86, so: this seems like a fair change in considering other reg, reg, imm-encoded SIMD instructions but I'd like a second :heavy_check_mark: on the broader idea of this code really just supporting x86 encoding at this point.

view this post on Zulip Wasmtime GitHub notifications bot (May 29 2020 at 22:08):

abrown commented on Issue #1762:

Closing this one in favor of #1770 after chatting offline with @iximeow.

Last updated: Dec 23 2024 at 13:07 UTC