tree aefec40f01cf5dc42fab0dd20fbc309fd9671b72
parent 7effd64e1180aa386cd36da9ca55a1e9fc7cf7cb
author Ilya Tocar <ilya.tocar@intel.com> 1519924502 -0600
committer Ilya Tocar <ilya.tocar@intel.com> 1520535384 +0000

ripemd160: use bits.Rotate for rotates

Replace x << k | x >> (32 - k) with bits.RotateLeft32 and add
benchmark to check performance. This makes code cleaner and improves performance:

MillionA-6  34.8ms ± 1%  26.7ms ± 1%  -23.41%  (p=0.000 n=10+10)

Change-Id: I1b0c45f5ea12c7b53ab1ec5a26efc1903555fa66
Reviewed-on: https://go-review.googlesource.com/97915
Run-TryBot: Ilya Tocar <ilya.tocar@intel.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>