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Enable/disable bit manipulation instruction sets based on the architecture instead of with a feature flag #6

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gnzlbg opened this issue Jun 19, 2016 · 2 comments
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Enable/disable bit manipulation instruction sets based on the architecture instead of with a feature flag #6

gnzlbg opened this issue Jun 19, 2016 · 2 comments

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@gnzlbg
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gnzlbg commented Jun 19, 2016

Right now the feature flag bmi2 must be explicitly passed to the library to enable the BMI2.0 instruction set. It would be better to enable this depending on the architecture.

Blocked on rust-lang/rust#30462 .
@gnzlbg
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gnzlbg commented Jun 21, 2016

Blocked on rust-lang/rust#34397 which would allow using -C target-feature=... or letting llc detect it based on the target architecture.

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gnzlbg commented Feb 2, 2017

This is handled by bitintr build.rs.

@gnzlbg gnzlbg closed this as completed Feb 2, 2017
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