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glibc/SHARED-FILES
Paul Zimmermann 392b3f0971 replace tgammaf by the CORE-MATH implementation 
The CORE-MATH implementation is correctly rounded (for any rounding mode).
This can be checked by exhaustive tests in a few minutes since there are
less than 2^32 values to check against for example GNU MPFR.
This patch also adds some bench values for tgammaf.

Tested on x86_64 and x86 (cfarm26).

With the initial GNU libc code it gave on an Intel(R) Core(TM) i7-8700:

      "tgammaf": {
       "": {
        "duration": 3.50188e+09,
        "iterations": 2e+07,
        "max": 602.891,
        "min": 65.1415,
        "mean": 175.094
       }
      }

With the new code:

      "tgammaf": {
       "": {
        "duration": 3.30825e+09,
        "iterations": 5e+07,
        "max": 211.592,
        "min": 32.0325,
        "mean": 66.1649
       }
      }

With the initial GNU libc code it gave on cfarm26 (i686):

  "tgammaf": {
   "": {
    "duration": 3.70505e+09,
    "iterations": 6e+06,
    "max": 2420.23,
    "min": 243.154,
    "mean": 617.509
   }
  }

With the new code:

  "tgammaf": {
   "": {
    "duration": 3.24497e+09,
    "iterations": 1.8e+07,
    "max": 1238.15,
    "min": 101.155,
    "mean": 180.276
   }
  }

Signed-off-by: Alexei Sibidanov <sibid@uvic.ca>
Signed-off-by: Paul Zimmermann <Paul.Zimmermann@inria.fr>

Changes in v2:
    - include <math.h> (fix the linknamespace failures)
    - restored original benchtests/strcoll-inputs/filelist#en_US.UTF-8 file
    - restored original wrapper code (math/w_tgammaf_compat.c),
      except for the dealing with the sign
    - removed the tgammaf/float entries in all libm-test-ulps files
    - address other comments from Joseph Myers
      (https://sourceware.org/pipermail/libc-alpha/2024-July/158736.html)

Changes in v3:
    - pass NULL argument for signgam from w_tgammaf_compat.c
    - use of math_narrow_eval
    - added more comments

Changes in v4:
    - initialize local_signgam to 0 in math/w_tgamma_template.c
    - replace sysdeps/ieee754/dbl-64/gamma_productf.c by dummy file

Changes in v5:
    - do not mention local_signgam any more in math/w_tgammaf_compat.c
    - initialize local_signgam to 1 instead of 0 in w_tgamma_template.c
      and added comment

Changes in v6:
    - pass NULL as 2nd argument of __ieee754_gammaf_r in
      w_tgammaf_compat.c, and check for NULL in e_gammaf_r.c

Changes in v7:
    - added Signed-off-by line for Alexei Sibidanov (author of the code)

Changes in v8:
    - added Signed-off-by line for Paul Zimmermann (submitted of the patch)

Changes in v9:
    - address comments from review by Adhemerval Zanella
Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
2024-10-11 11:12:32 +02:00

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# Files shared with other projects. Pass a file path to the
# get_glibc_shared_code() function in the python library
# scripts/glibc_shared_code.py to get a dict object with this information. See
# the library sources for more information.
# The headers on most of these files indicate that glibc is the canonical
# source for these files, although in many cases there seem to be useful
# changes in the gnulib versions that could be merged back in. Not all gnulib
# files contain such a header and it is not always consistent in its format, so
# it would be useful to make sure that all gnulib files that are using glibc as
# upstream have a greppable header.
#
# These files are quite hard to find without a header to grep for and each file
# has to be compared manually so this list is likely incomplete or may contain
# errors.
gnulib:
argp/argp-ba.c
argp/argp-ba.c
argp/argp-eexst.c
argp/argp-fmtstream.c
argp/argp-fmtstream.h
argp/argp-fs-xinl.c
argp/argp-help.c
argp/argp-namefrob.h
argp/argp-parse.c
argp/argp-pv.c
argp/argp-pvh.c
argp/argp-xinl.c
argp/argp.h
dirent/alphasort.c
dirent/scandir.c
# Merged from gnulib 2021-09-21
include/intprops.h
# Merged from gnulib 2021-09-21
include/regex.h
locale/programs/3level.h
# Merged from gnulib 2014-6-23
malloc/obstack.c
# Merged from gnulib 2014-6-23
malloc/obstack.h
# Merged from gnulib 2014-07-10
misc/error.c
misc/error.h
misc/getpass.c
misc/mkdtemp.c
# Merged from gnulib 2021-09-21
misc/sys/cdefs.h
posix/fnmatch_loop.c
# Intended to be the same. Gnulib copy contains glibc changes.
posix/getopt.c
# Intended to be the same. Gnulib copy contains glibc changes.
posix/getopt1.c
# Intended to be the same. Gnulib copy contains glibc changes.
posix/getopt_int.h
posix/glob.c
# Merged from gnulib 2021-09-21
posix/regcomp.c
# Merged from gnulib 2021-09-21
posix/regex.c
# Merged from gnulib 2021-09-21
posix/regex.h
# Merged from gnulib 2021-09-21
posix/regex_internal.c
# Merged from gnulib 2021-09-21
posix/regex_internal.h
# Merged from gnulib 2021-09-21
posix/regexec.c
posix/spawn.c
posix/spawn_faction_addclose.c
posix/spawn_faction_adddup2.c
posix/spawn_faction_addopen.c
posix/spawn_faction_destroy.c
posix/spawn_faction_init.c
posix/spawn_int.h
posix/spawnattr_destroy.c
posix/spawnattr_getdefault.c
posix/spawnattr_getflags.c
posix/spawnattr_getpgroup.c
posix/spawnattr_getschedparam.c
posix/spawnattr_getschedpolicy.c
posix/spawnattr_getsigmask.c
posix/spawnattr_init.c
posix/spawnattr_setdefault.c
posix/spawnattr_setflags.c
posix/spawnattr_setpgroup.c
posix/spawnattr_setschedparam.c
posix/spawnattr_setschedpolicy.c
posix/spawnattr_setsigmask.c
posix/spawnp.c
stdlib/atoll.c
stdlib/getsubopt.c
stdlib/setenv.c
stdlib/strtoll.c
stdlib/strtoul.c
# Merged from gnulib 2014-6-26, needs merge back
string/memchr.c
string/memcmp.c
string/memmem.c
string/mempcpy.c
string/memrchr.c
string/rawmemchr.c
string/stpcpy.c
string/stpncpy.c
string/str-two-way.h
string/strcasestr.c
string/strcspn.c
string/strdup.c
string/strndup.c
string/strpbrk.c
string/strsignal.c
string/strstr.c
string/strtok_r.c
string/strverscmp.c
# Merged from gnulib 2024-04-08 (gnulib commit 3238349628)
stdio-common/tmpdir.c
stdio-common/tmpdir.h
sysdeps/generic/pty-private.h
sysdeps/generic/siglist.h
sysdeps/posix/euidaccess.c
sysdeps/posix/gai_strerror.c
sysdeps/posix/getcwd.c
sysdeps/posix/pwrite.c
sysdeps/posix/spawni.c
# Merged from gnulib 2024-04-08 (gnulib commit 3238349628)
sysdeps/posix/tempname.c
# Merged from gnulib 2014-6-27
time/mktime.c
time/mktime-internal.h
time/strptime.c
time/timegm.c
# The last merge was 2014-12-11 and merged gettext 0.19.3 into glibc with a
# patch submitted to the gettext mailing list for changes that could be merged
# back.
#
# This commit was omitted from the merge as it does not appear to be compatible
# with how glibc expects things to work:
#
# commit 279b57fc367251666f00e8e2b599b83703451afb
# Author: Bruno Haible <bruno@clisp.org>
# Date: Fri Jun 14 12:03:49 2002 +0000
#
# Make absolute pathnames inside $LANGUAGE work.
gettext:
intl/bindtextdom.c
intl/dcgettext.c
intl/dcigettext.c
intl/dcngettext.c
intl/dgettext.c
intl/dngettext.c
intl/explodename.c
intl/finddomain.c
intl/gettext.c
intl/gettextP.h
intl/gmo.h
intl/hash-string.c
intl/hash-string.h
intl/l10nflist.c
intl/loadinfo.h
intl/loadmsgcat.c
intl/locale.alias
intl/localealias.c
intl/ngettext.c
intl/plural-exp.c
intl/plural-exp.h
intl/plural.y
intl/textdomain.c
# The following files are shared with the upstream Unicode project and must be
# updated regularly to stay in sync with the upstream unicode releases.
#
# Merged from Unicode 16.0.0 release.
unicode:
localedata/unicode-gen/UnicodeData.txt
localedata/unicode-gen/unicode-license.txt
localedata/unicode-gen/DerivedCoreProperties.txt
localedata/unicode-gen/EastAsianWidth.txt
localedata/unicode-gen/HangulSyllableType.txt
# The following files are shared with the upstream tzcode project and must be
# updated regularly to stay in sync with the upstream releases.
#
# Currently synced to TZDB 2024b, announced and distributed here:
# https://github.com/eggert/tz/releases/tag/2024b
tzcode:
timezone/private.h
timezone/tzfile.h
timezone/tzselect.ksh
timezone/version
timezone/zdump.c
timezone/zic.c
# The following files are shared with the upstream tzdata project but is not
# synchronized regularly. The data files themselves are used only for testing
# purposes and their data is never used to generate any output. We synchronize
# them only to stay on top of newer data that might help with testing.
#
# Currently synced to tzcode 2009i, announced and distributed here:
# https://mm.icann.org/pipermail/tz/2009-June/040697.html
# https://data.iana.org/time-zones/releases/tzdata2009i.tar.gz
tzdata:
timezone/africa
timezone/antarctica
timezone/asia
timezone/australasia
timezone/europe
timezone/northamerica
timezone/southamerica
timezone/pacificnew
timezone/etcetera
timezone/factory
timezone/backward
timezone/systemv
timezone/solar87
timezone/solar88
timezone/solar89
timezone/iso3166.tab
timezone/zone.tab
timezone/leapseconds
# This is yearistype.sh in the parent project
timezone/yearistype
# The following files are shared with the CORE-MATH project
sysdeps/ieee754/flt-32/e_gammaf_r.c
(file src/binary32/tgamma/tgammaf.c in CORE-MATH)
Instructions to merge new versions:
- change the function name from cr_tgammaf to __ieee754_gammaf_r
- add "int *signgamp" as 2nd argument and add at the beginning:
if (signgamp != NULL) *signgamp = 1;
- remove the errno stuff (this is done by the wrapper)
- replace 0x1p127f * 0x1p127f by math_narrow_eval (x * 0x1p127f)
- replace 0x1p-127f * sgn[k&1] by math_narrow_eval (0x1p-127f * sgn[k&1])
- add libm_alias_finite (__ieee754_gammaf_r, __gammaf_r) at the end
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