tree 7495b97c2e1d5dacd0a900e483cea8b5ece3f6a2
parent 4f45737414dc36c02b62c3adac99418bd1fa70db
author Paul E. Murphy <murp@ibm.com> 1618841648 -0500
committer Lynn Boger <laboger@linux.vnet.ibm.com> 1619015324 +0000

poly1305: cleanup ppc64le R0/$0 usage

There is some implicit R0 == $0 here which may not be desired.

"CMP $0, Rx" translates to "cmpd r0, rX" which is less preferred
than "cmpdi r0, 0".  Likewise, "ADDE $0, Rx" also turns into
"adde R0, Rx, Rx" which can be simplified to a similar instruction
which adds to zero with carry, "ADDZE Rx, Rx".

Change-Id: I5de17ff5b02c7c9d57daf014c7fe9420bfbeeeab
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/311372
Reviewed-by: Carlos Eduardo Seo <carlos.seo@linaro.org>
Trust: Carlos Eduardo Seo <carlos.seo@linaro.org>
Trust: Lynn Boger <laboger@linux.vnet.ibm.com>