Stream: git-wasmtime

Topic: wasmtime / Issue #2647 Support more atomic_rmw ops

Wasmtime GitHub notifications bot (Feb 09 2021 at 13:33):

bjorn3 opened Issue #2647:

<!-- Please try to describe precisely what you would like to do in
Cranelift/Wasmtime and/or expect from it. You can answer the questions below if
they're relevant and delete this text before submitting. Thanks for opening an
issue! -->

Feature

Support the following operations:

• (u){min,max}
• nand

Benefit

This is required for implementing certain rust intrinsics.

Implementation

<!-- Do you have an implementation plan, and/or ideas for data structures or
algorithms to use? -->

Alternatives

• Use a global lock instead of atomic instructions in cg_clif (bad perf)
• Don't implement these stable operations in cg_clif

Wasmtime GitHub notifications bot (Feb 10 2021 at 19:58):

bjorn3 commented on Issue #2647:

Looks like LLVM uses cmpxchg for these. I guess I could lower to that manually in cg_clif.

Wasmtime GitHub notifications bot (Feb 18 2021 at 16:34):

cfallin closed Issue #2647:

<!-- Please try to describe precisely what you would like to do in
Cranelift/Wasmtime and/or expect from it. You can answer the questions below if
they're relevant and delete this text before submitting. Thanks for opening an
issue! -->

Feature

Support the following operations:

• (u){min,max}
• nand

Benefit

This is required for implementing certain rust intrinsics.

Implementation

<!-- Do you have an implementation plan, and/or ideas for data structures or
algorithms to use? -->

Alternatives

• Use a global lock instead of atomic instructions in cg_clif (bad perf)
• Don't implement these stable operations in cg_clif

Last updated: Dec 23 2024 at 12:05 UTC