RFR: 8264054: Bad XMM performance on java.lang.MathBench.sqrtDouble [v4]

Wed Mar 31 20:41:42 UTC 2021

On Wed, 31 Mar 2021 08:13:17 GMT, Vladimir Ivanov <vlivanov at openjdk.org> wrote:

>> Sandhya Viswanathan has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Added comments for sqrtF_reg and sqrtD_reg rules
>
> src/hotspot/cpu/x86/x86.ad line 3235:
> 
>> 3233: %}
>> 3234: 
>> 3235: instruct sqrtF_reg(regF dst, regF src) %{
> 
> Would be helpful to have a comment describing why there are only reg-to-reg variants kept for `SqrtF`/`SqrtD`.

Done, added comments for the sqrt rules.

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PR: https://git.openjdk.java.net/jdk/pull/3256