[vector] Fix reduce_add2F/reduce_add2D for incorrect associativity

[Yang Zhang]

Looks good to me.

Regards
Yang

-----Original Message-----
From: panama-dev <panama-dev-bounces at openjdk.java.net> On Behalf Of Qi Feng
Sent: Wednesday, March 4, 2020 3:03 PM
To: panama-dev at openjdk.java.net
Cc: nd <nd at arm.com>
Subject: [vector] Fix reduce_add2F/reduce_add2D for incorrect associativity

Hi,

Please help me review this patch.

Webrev: http://cr.openjdk.java.net/~yzhang/vectorapi/vectorapi.fadd/webrev.00/

The implementation of these two instructs on AArch64 accumulate it's arguments in the wrong order, since the addition of floating point values doesn't obey associative law.

Thanks,
Qi