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Complete lemmas that relate shifting with &&& allOnes #614

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tobiasgrosser opened this issue Sep 13, 2024 · 2 comments
Open

Complete lemmas that relate shifting with &&& allOnes #614

tobiasgrosser opened this issue Sep 13, 2024 · 2 comments
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@tobiasgrosser
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tobiasgrosser commented Sep 13, 2024 •
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There is a second identity in this space; we currently only have proven one:

x >>> n <<< n = x &&& BitVec.allOnes w <<< n := by
x <<< n >>> n = x &&& BitVec.allOnes w >>> n := by

Also, what about sshiftRight?
@luisacicolini luisacicolini self-assigned this Sep 19, 2024
@luisacicolini
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these are the ones solving statement 476, right?

@tobiasgrosser
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Not sure. None of these may be needed for lean-mlir, but for upstreaming we typically want to complete a family of PRs.

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