[jira] Assigned: (HARMONY-6460) [classlib][fdlibm]Upgrade fdlibm5.2 to 5.3

["Regis Xu (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HARMONY-6460?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Regis Xu reassigned HARMONY-6460:
---------------------------------

    Assignee: Regis Xu

> [classlib][fdlibm]Upgrade fdlibm5.2 to 5.3
> ------------------------------------------
>
>                 Key: HARMONY-6460
>                 URL: https://issues.apache.org/jira/browse/HARMONY-6460
>             Project: Harmony
>          Issue Type: Improvement
>          Components: Classlib
>    Affects Versions: 5.0M14
>            Reporter: deven you
>            Assignee: Regis Xu
>             Fix For: 5.0M14
>
>         Attachments: HARMONY-6460.diff, HARMONY-6460.v2.diff, HY-6460.diff, TestMathTan.java
>
>   Original Estimate: 96h
>  Remaining Estimate: 96h
>
> Hi All,
> I noticed that java spec says "The Java math library is defined with respect to fdlibm version 5.3." within java.lang.StrictMath class specification from jdk 5.0. However our harmony still use fdlibm5.2. And a test case[1] shows harmony's math functions results are different compared to ri 6.0 for this reason.
>  So I think we should upgrade fdlibm from 5.2 to 5.3 to keep consistency with ri. I have done this on my local machine by following steps:
> 1. Download fdlibm5.3 zip file from http://www.validlab.com/software/
> 2. Unzip the zip file, this will unzip a folder named fdlibm53 on current path. Then enter fdlibm53 and rename fdlibm.h, Makefile, Makefile.in and s_lib_version.c with suffix .orig.
> 3. Re package all files in fdlibm53 into fdlibm_5.3.zip.
> 4. Replace HYROOT/deploy/oss/fdlibm_5.2.zip with the above fdlibm_5.3.zip, HYROOT is the root directory of harmony classlib trunk repository.
> 5. Apply attached patch[2].
> 6. Build the trunk and run corresponding test case. 
> [1][2]: see the attached files

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