Wasmtime GitHub notifications bot (Nov 05 2022 at 11:44): Wasmtime GitHub notifications bot (Nov 05 2022 at 11:44):uweigand edited PR #5196 from bitcast-lanes to main:
Add a MemFlags operand to the bitcast instruction, where only the
bigandlittleflags are accepted. These define the lane order to be used when casting between types of different lane counts.Update all users to pass an appropriate MemFlags argument.
Implement lane swaps where necessary in the s390x back-end.
This is the final part necessary to fix
https://github.com/bytecodealliance/wasmtime/issues/4566.CC @cfallin
This is still a RFC because of the following questions:
- Should we enforce that a byte order flag must be explicitly specified if the types differ in lane count? (This would be easily doable in the verifier.)
- There was some discussion in the issue whether or not the
MemFlagsAPI is the right choice. It seems that way to me, since it makes the semantics easy to specific, and is simple to implement based on the already existingMemFlagsinfrastructure. If you prefer some other implementation, please let me know - I'd be happy to change this.<!--
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Wasmtime GitHub notifications bot (Nov 07 2022 at 22:41):cfallin submitted PR review.
Wasmtime GitHub notifications bot (Nov 07 2022 at 22:41):cfallin merged PR #5196.
Last updated: Dec 23 2024 at 13:07 UTC