RFR: 8302358: Behavior of adler32 changes after JDK-8300208 [v2]

[Sandhya Viswanathan]

> This PR fixes the issue in Adler computation on x86_64. The problem was  due to a missing register clear. Also the test is updated to capture the failed test case.
> 
> Please review.
> 
> Best Regards,
> Sandhya

Sandhya Viswanathan has updated the pull request incrementally with one additional commit since the last revision:

  move register clear to beginning of SLOOP1 and some cleanup

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Changes:
  - all: https://git.openjdk.org/jdk/pull/12581/files
  - new: https://git.openjdk.org/jdk/pull/12581/files/5bc38439..b51a48f4

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=12581&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=12581&range=00-01

  Stats: 10 lines in 1 file changed: 1 ins; 5 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/12581.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/12581/head:pull/12581

PR: https://git.openjdk.org/jdk/pull/12581