[glibc] Deleted branch azanella/exp10f-optimization

[glibc] Deleted branch azanella/exp10f-optimization

[Adhemerval Zanella]

The branch 'azanella/exp10f-optimization' was deleted.
It previously pointed to:

 958dca88df... New exp10f version without SVID compat wrapper

Diff:

!!! WARNING: THE FOLLOWING COMMITS ARE NO LONGER ACCESSIBLE (LOST):
-------------------------------------------------------------------

  958dca8... New exp10f version without SVID compat wrapper
  1d912eb... i386: Use generic exp10f
  07d7ea4... math: Optimized generic exp10f with wrappers
  6c18ac0... benchtests: Add exp10f benchmark

commit 958dca88dfae18b69e0189011c78a26783d72a50
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date:   Wed Apr 8 19:51:44 2020 -0300

    New exp10f version without SVID compat wrapper
    
    This patch changes the exp10f error handling semantics to only set
    errno accoring to POSIX rules. New symbol version is introduced at
    GLIBC_2.32.  The old wrappers are kept for compat symbols.
    
    There are some outliers that need special handling:
    
      - ia64 provides an optimized implementaion of exp10f that uses ia64
        specific routines to set SVID compatibility.  The new symbol version
        is aliased to the exp10f one.
    
      - m68k with also provides an optimized implementation, adn the new
        version uses it instead of the sysdeps/ieee754/flt32 one.
    
      - riscv and csky uses the generic template implementation that
        does not provide SVID support.  For both cases a new exp10f
        version is not added, but rather the symbols version of the
        generic sysdeps/ieee754/flt32 is adjusted instead.
    
    Checked on aarch64-linux-gnu, x86_64-linux-gnu, i686-linux-gnu,
    powerpc64le-linux-gnu.

commit 1d912ebb66be1df6aaf06e708e61a6fdcc6c1757
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date:   Wed Apr 8 17:42:46 2020 -0300

    i386: Use generic exp10f
    
    The generic implementation is twice as fast.  Using the exp10f
    benchmark:
    
     * master:
      "exp10f": {
       "": {
        "duration": 4.25753e+09,
        "iterations": 3.3376e+07,
        "max": 1414.77,
        "min": 103.649,
        "mean": 127.563
       }
      }
    
     * patched:
      "exp10f": {
       "": {
        "duration": 4.05755e+09,
        "iterations": 6.9136e+07,
        "max": 1489.64,
        "min": 50.95,
        "mean": 58.6894
       }
      }
    
    Checked on i686-linux-gnu.

commit 07d7ea4aaa7fdbb028d51111e0d96cd057ea6d8b
Author: Paul Zimmermann <Paul.Zimmermann@inria.fr>
Date:   Wed Apr 8 17:32:28 2020 -0300

    math: Optimized generic exp10f with wrappers
    
    It is inspired by expf and reuses its tables and internal functions.
    The error checks are inlined and errno setting is in separate tail
    called functions, but the wrappers are kept in this patch to handle
    the _LIB_VERSION==_SVID_ case.
    
    Double precision arithmetics is used which is expected to be faster on
    most targets (including soft-float) than using single precision and it
    is easier to get good precision result with it.
    
    Result for x86_64 (i7-4790K CPU @ 4.00GHz) are:
    
    Before new code:
      "exp10f": {
       "": {
        "duration": 1.00923e+09,
        "iterations": 5.4832e+07,
        "max": 249.361,
        "min": 12.5,
        "mean": 18.4059
       }
    
    With new code:
      "exp10f": {
       "": {
        "duration": 9.7639e+08,
        "iterations": 8.1056e+07,
        "max": 563.323,
        "min": 11.54,
        "mean": 12.0459
       }
    
    Result for aarch64 (A72 @ 2GHz) are:
    
    Before new code:
      "exp10f": {
       "": {
        "duration": 1.00923e+09,
        "iterations": 5.4832e+07,
        "max": 249.361,
        "min": 12.5,
        "mean": 18.4059
       }
    
    With new code:
      "exp10f": {
       "": {
        "duration": 9.7639e+08,
        "iterations": 8.1056e+07,
        "max": 563.323,
        "min": 11.54,
        "mean": 12.0459
       }
    
    Checked on x86_64-linux-gnu, powerpc64le-linux-gnu, aarch64-linux-gnu,
    and sparc64-linux-gnu.

commit 6c18ac09bad13e4ed61268b91bb8a39eb8413f6c
Author: Paul Zimmermann <Paul.Zimmermann@inria.fr>
Date:   Wed Apr 8 17:00:06 2020 -0300

    benchtests: Add exp10f benchmark
    
    Based on random inputs.