Conversation
The `cpubits` crate contains a macro for selecting between 32-bit and 64-bit backends, incorporating 64-bit overrides for certain natively 32-bit targets with native ISA support for operations "register pairs", namely ARMv7 and WASM. It also supports overriding the selection with `cfg(cpubits = "...")` This switches the selection of the 32-bit vs 64-bit soft backend, always compiled into the crate as it's used as a fallback implementation if intrinsics aren't available, to using `cpubits`. The crate contains a vendored copy of `cfg-if`, so this also replaces `cfg-if` as a dependency with `cpubits`.
newpavlov
approved these changes
Feb 2, 2026
Co-authored-by: Artyom Pavlov <newpavlov@gmail.com>
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
The
cpubitscrate contains a macro for selecting between 32-bit and 64-bit backends, incorporating 64-bit overrides for certain natively 32-bit targets with native ISA support for operations on "register pairs", namely ARMv7 and WASM. It also supports overriding the selection withcfg(cpubits = "...")This switches the selection of the 32-bit vs 64-bit soft backend, always compiled into the crate as it's used as a fallback implementation if intrinsics aren't available, to using
cpubits.The crate contains a vendored copy of
cfg-if, so this also replacescfg-ifas a dependency withcpubits.