[Bug math/28765] New: x86_64 libmvec atan2 accuracy

[Bug math/28765] New: x86_64 libmvec atan2 accuracy

[skpgkp2 at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=28765

            Bug ID: 28765
           Summary: x86_64 libmvec atan2 accuracy
           Product: glibc
           Version: 2.35
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: math
          Assignee: unassigned at sourceware dot org
          Reporter: skpgkp2 at gmail dot com
  Target Milestone: ---

libmvec vector function atan2 has greater than 4 ulps accuracy on SSE4.2 for
following inputs.

atan2(_ZGVbN2vv_atan2@GLIBC_2.35) on SSE4.2:

    {0x1.bcab29da0e947p-54,0x1.bc41f4d2294b8p-54}     4.19888 ulps
    {0x1.b836ed678be29p-588,0x1.b7be6f5a03a8cp-588}   4.09889 ulps

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[Bug math/28765] x86_64 libmvec atan2 accuracy

[skpgkp2 at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=28765

Sunil Pandey <skpgkp2 at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |hjl.tools at gmail dot com,
                   |                            |zimmerma+gcc at loria dot fr

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[Bug math/28765] x86_64 libmvec atan2 accuracy

[hjl.tools at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=28765

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |2.35
     Ever confirmed|0                           |1
           Assignee|unassigned at sourceware dot org   |skpgkp2 at gmail dot com
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2022-01-11

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[Bug math/28765] x86_64 libmvec atan2 accuracy

[cvs-commit at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=28765

--- Comment #1 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Sunil Pandey <skpgkp2@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=49e2bf58d57758df244eb621d63cedd2ab6d1971

commit 49e2bf58d57758df244eb621d63cedd2ab6d1971
Author: Sunil K Pandey <skpgkp2@gmail.com>
Date:   Wed Jan 12 11:02:19 2022 -0800

    x86_64: Fix SSE4.2 libmvec atan2 function accuracy [BZ #28765]

    This patch fixes SSE4.2 libmvec atan2 function accuracy for following
    inputs to less than 4 ulps.

    {0x1.bcab29da0e947p-54,0x1.bc41f4d2294b8p-54}   4.19888 ulps
    {0x1.b836ed678be29p-588,0x1.b7be6f5a03a8cp-588} 4.09889 ulps

    This fixes BZ #28765.

    Reviewed-by: H.J. Lu <hjl.tools@gmail.com>

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[Bug math/28765] x86_64 libmvec atan2 accuracy

[cvs-commit at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=28765

--- Comment #2 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Sunil Pandey <skpgkp2@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=047512374a95b7bc42a996f61def50843f2bd5e7

commit 047512374a95b7bc42a996f61def50843f2bd5e7
Author: Sunil K Pandey <skpgkp2@gmail.com>
Date:   Wed Jan 12 12:26:35 2022 -0800

    math: Add more inputs to atan2 accuracy tests [BZ #28765]

    This patch adds following inputs:

    0x1.bcab29da0e947p-54 0x1.bc41f4d2294b8p-54
    0x1.a11891ec004d4p-348 0x1.814830510be26p-348
    0x1.b836ed678be29p-588 0x1.b7be6f5a03a8cp-588
    0x1.a83f842ef3f73p-633 0x1.a799d8a6677ep-633

    to atan2 tests and updates x86_64 double atan2 ulps.

    This fixes BZ #28765.

    Reviewed-By: Paul Zimmermann <Paul.Zimmermann@inria.fr>

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[Bug math/28765] x86_64 libmvec atan2 accuracy

[hjl.tools at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=28765

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
Fixed.

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