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The Div functions in math/bits (Div, Div32, and Div64) compute both quotients and remainders, but they panic if the quotients do not not fit a 32/64 uint. Since, on the other hand, the remainder will always fit the size of the divisor, it is useful to have Div variants that only compute the remainder, and don't panic on a quotient overflow. This change adds to the math/bits package three new functions: Rem(hi, lo, y uint) uint Rem32(hi, lo, y uint32) uint32 Rem64(hi, lo, y uint64) uint64 which can be used to compute (hi,lo)%y even when the quotient overflows the uint size. Fixes #28970 Change-Id: I119948429f737670c5e5ceb8756121e6a738dbdc Reviewed-on: https://go-review.googlesource.com/c/go/+/197838 Run-TryBot: Alberto Donizetti <alb.donizetti@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Keith Randall <khr@golang.org> |
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