vcpkg/toolsrc/src/vcpkg-test/uint128.cpp, branch 2020.04 Forked from https://github.com/microsoft/vcpkg [vcpkg] Correct UInt128 code 😇 (#10583) 2020-04-09T21:11:53+00:00 nicole mazzuca mazzucan@outlook.com 2020-04-09T21:11:53+00:00 47a4913834d0f1e16a3340a8718c8bcdb8431f45 * [vcpkg] Correct UInt128 code 😇 `UInt128::operator<<(x, y)` should clear the bottom 64 bits of `x` if `y >= 64`; however, we don't do this, and so we duplicate `x`'s bottom bits into `x.top` instead of moving them. Similarly, we have the opposite problem for `UInt128::operator>>`. This commit fixes these latent bugs, which we weren't hitting because the thing we use them for never actually shifts more than 64 bits. 
* [vcpkg] Correct UInt128 code 😇

`UInt128::operator<<(x, y)` should clear the bottom 64 bits of `x` if
`y >= 64`; however, we don't do this, and so we duplicate `x`'s bottom
bits into `x.top` instead of moving them. Similarly, we have the
opposite problem for `UInt128::operator>>`. This commit fixes these
latent bugs, which we weren't hitting because the thing we use them for
never actually shifts more than 64 bits.