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* Update copyright dates with scripts/update-copyrightsJoseph Myers2023-01-061-1/+1
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* Update copyright dates with scripts/update-copyrightsPaul Eggert2022-01-011-1/+1
| | | | | | | | | | | | | | | | | | | | | | | I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 7061 files FOO. I then removed trailing white space from math/tgmath.h, support/tst-support-open-dev-null-range.c, and sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following obscure pre-commit check failure diagnostics from Savannah. I don't know why I run into these diagnostics whereas others evidently do not. remote: *** 912-#endif remote: *** 913: remote: *** 914- remote: *** error: lines with trailing whitespace found ... remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
* Use GCC builtins for roundeven functions if desired.Shen-Ta Hsieh2021-06-271-0/+5
| | | | | | | | | | | | | This patch is using the corresponding GCC builtin for roundevenf, roundeven and roundevenl if the USE_FUNCTION_BUILTIN macros are defined to one in math-use-builtins.h. These builtin functions is supported since GCC 10. The code of the generic implementation is not changed. Signed-off-by: Shen-Ta Hsieh <ibmibmibm.tw@gmail.com> Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
* math: redirect roundeven functionShen-Ta Hsieh2021-06-271-0/+3
| | | | | | | This patch redirect roundeven function for futhermore changes. Signed-off-by: Shen-Ta Hsieh <ibmibmibm.tw@gmail.com> Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
* Update copyright dates with scripts/update-copyrightsPaul Eggert2021-01-021-1/+1
| | | | | | | | | | | | | | | | I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 6694 files FOO. I then removed trailing white space from benchtests/bench-pthread-locks.c and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this diagnostic from Savannah: remote: *** pre-commit check failed ... remote: *** error: lines with trailing whitespace found remote: error: hook declined to update refs/heads/master
* Update copyright dates with scripts/update-copyrights.Joseph Myers2020-01-011-1/+1
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* Prefer https to http for gnu.org and fsf.org URLsPaul Eggert2019-09-071-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Also, change sources.redhat.com to sourceware.org. This patch was automatically generated by running the following shell script, which uses GNU sed, and which avoids modifying files imported from upstream: sed -ri ' s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g ' \ $(find $(git ls-files) -prune -type f \ ! -name '*.po' \ ! -name 'ChangeLog*' \ ! -path COPYING ! -path COPYING.LIB \ ! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \ ! -path manual/texinfo.tex ! -path scripts/config.guess \ ! -path scripts/config.sub ! -path scripts/install-sh \ ! -path scripts/mkinstalldirs ! -path scripts/move-if-change \ ! -path INSTALL ! -path locale/programs/charmap-kw.h \ ! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \ ! '(' -name configure \ -execdir test -f configure.ac -o -f configure.in ';' ')' \ ! '(' -name preconfigure \ -execdir test -f preconfigure.ac ';' ')' \ -print) and then by running 'make dist-prepare' to regenerate files built from the altered files, and then executing the following to cleanup: chmod a+x sysdeps/unix/sysv/linux/riscv/configure # Omit irrelevant whitespace and comment-only changes, # perhaps from a slightly-different Autoconf version. git checkout -f \ sysdeps/csky/configure \ sysdeps/hppa/configure \ sysdeps/riscv/configure \ sysdeps/unix/sysv/linux/csky/configure # Omit changes that caused a pre-commit check to fail like this: # remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines git checkout -f \ sysdeps/powerpc/powerpc64/ppc-mcount.S \ sysdeps/unix/sysv/linux/s390/s390-64/syscall.S # Omit change that caused a pre-commit check to fail like this: # remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
* Update copyright dates with scripts/update-copyrights.Joseph Myers2019-01-011-1/+1
| | | | | | | * All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
* Update copyright dates with scripts/update-copyrights.Joseph Myers2018-01-011-1/+1
| | | | | | | * All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
* Use libm_alias_float in flt-32.Joseph Myers2017-09-221-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch makes flt-32 libm functions use libm_alias_float to define public interfaces (in cases where _Float32 aliases of those interfaces would be appropriate, so not for finitef / isinff / isnanf). Tested for x86_64. Also tested with build-many-glibcs.py that installed stripped shared libraries are unchanged by the patch. * sysdeps/ieee754/flt-32/s_asinhf.c: Include <libm-alias-float.h>. (asinhf): Define using libm_alias_float. * sysdeps/ieee754/flt-32/s_atanf.c: Include <libm-alias-float.h>. (atanf): Define using libm_alias_float. * sysdeps/ieee754/flt-32/s_cbrtf.c: Include <libm-alias-float.h>. (cbrtf): Define using libm_alias_float. * sysdeps/ieee754/flt-32/s_ceilf.c: Include <libm-alias-float.h>. (ceilf): Define using libm_alias_float. * sysdeps/ieee754/flt-32/s_copysignf.c: Include <libm-alias-float.h>. (copysignf): Define using libm_alias_float. * sysdeps/ieee754/flt-32/s_cosf.c: Include <libm-alias-float.h>. (cosf): Define using libm_alias_float. * sysdeps/ieee754/flt-32/s_erff.c: Include <libm-alias-float.h>. (erff): Define using libm_alias_float. (erfcf): Likewise. * sysdeps/ieee754/flt-32/s_expm1f.c: Include <libm-alias-float.h>. (expm1f): Define using libm_alias_float. * sysdeps/ieee754/flt-32/s_fabsf.c: Include <libm-alias-float.h>. (fabsf): Define using libm_alias_float. * sysdeps/ieee754/flt-32/s_floorf.c: Include <libm-alias-float.h>. (floorf): Define using libm_alias_float. * sysdeps/ieee754/flt-32/s_frexpf.c: Include <libm-alias-float.h>. (frexpf): Define using libm_alias_float. * sysdeps/ieee754/flt-32/s_fromfpf.c (fromfpf): Define using libm_alias_float. * sysdeps/ieee754/flt-32/s_fromfpf_main.c: Include <libm-alias-float.h>. * sysdeps/ieee754/flt-32/s_fromfpxf.c (fromfpxf): Define using libm_alias_float. * sysdeps/ieee754/flt-32/s_getpayloadf.c: Include <libm-alias-float.h>. (getpayloadf): Define using libm_alias_float. * sysdeps/ieee754/flt-32/s_llrintf.c: Include <libm-alias-float.h>. (llrintf): Define using libm_alias_float. * sysdeps/ieee754/flt-32/s_llroundf.c: Include <libm-alias-float.h>. (llroundf): Define using libm_alias_float. * sysdeps/ieee754/flt-32/s_logbf.c: Include <libm-alias-float.h>. (logbf): Define using libm_alias_float. * sysdeps/ieee754/flt-32/s_lrintf.c: Include <libm-alias-float.h>. (lrintf): Define using libm_alias_float. * sysdeps/ieee754/flt-32/s_lroundf.c: Include <libm-alias-float.h>. (lroundf): Define using libm_alias_float. * sysdeps/ieee754/flt-32/s_modff.c: Include <libm-alias-float.h>. (modff): Define using libm_alias_float. * sysdeps/ieee754/flt-32/s_nearbyintf.c: Include <libm-alias-float.h>. (nearbyintf): Define using libm_alias_float. * sysdeps/ieee754/flt-32/s_nextafterf.c: Include <libm-alias-float.h>. (nextafterf): Define using libm_alias_float. * sysdeps/ieee754/flt-32/s_nextupf.c: Include <libm-alias-float.h>. (nextupf): Define using libm_alias_float. * sysdeps/ieee754/flt-32/s_remquof.c: Include <libm-alias-float.h>. (remquof): Define using libm_alias_float. * sysdeps/ieee754/flt-32/s_rintf.c: Include <libm-alias-float.h>. (rintf): Define using libm_alias_float. * sysdeps/ieee754/flt-32/s_roundevenf.c: Include <libm-alias-float.h>. (roundevenf): Define using libm_alias_float. * sysdeps/ieee754/flt-32/s_roundf.c: Include <libm-alias-float.h>. (roundf): Define using libm_alias_float. * sysdeps/ieee754/flt-32/s_setpayloadf.c (setpayloadf): Define using libm_alias_float. * sysdeps/ieee754/flt-32/s_setpayloadf_main.c: Include <libm-alias-float.h>. * sysdeps/ieee754/flt-32/s_setpayloadsigf.c (setpayloadsigf): Define using libm_alias_float. * sysdeps/ieee754/flt-32/s_sincosf.c: Include <libm-alias-float.h>. (sincosf): Define using libm_alias_float. * sysdeps/ieee754/flt-32/s_sinf.c: Include <libm-alias-float.h>. (sinf): Define using libm_alias_float. * sysdeps/ieee754/flt-32/s_tanf.c: Include <libm-alias-float.h>. (tanf): Define using libm_alias_float. * sysdeps/ieee754/flt-32/s_tanhf.c: Include <libm-alias-float.h>. (tanhf): Define using libm_alias_float. * sysdeps/ieee754/flt-32/s_totalorderf.c: Include <libm-alias-float.h>. (totalorderf): Define using libm_alias_float. * sysdeps/ieee754/flt-32/s_totalordermagf.c: Include <libm-alias-float.h>. (totalordermagf): Define using libm_alias_float. * sysdeps/ieee754/flt-32/s_truncf.c: Include <libm-alias-float.h>. (truncf): Define using libm_alias_float. * sysdeps/ieee754/flt-32/s_ufromfpf.c (ufromfpf): Define using libm_alias_float. * sysdeps/ieee754/flt-32/s_ufromfpxf.c (ufromfpxf): Define using libm_alias_float.
* Make more libm functions into weak aliases.Joseph Myers2017-09-141-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Many libm functions define the function as __<func> and then define <func> as a weak alias. This is not at all limited to cases where there is an internal call that has namespace reasons to need to call __<func> instead of <func>. The common macros for creating libm function aliases work on the basis of public function names all being aliases; that is, they define aliases for functions using the above pattern. Thus, where a function just defines the public name <func> directly, changing that to be a weak alias enables a subsequent conversion to the common macros to retain the exact existing symbols (and so be testable by comparison of stripped binaries). This patch converts many existing functions to use the weak alias pattern, as preparation for subsequent conversions to common macros. I do expect that _FloatN/_FloatNx function aliases will end up needing new variants of the common macros that do *not* create the original float / double / long double name of a function - for cases where that name is created specially to give it a particular symbol version, for example - but for functions that can use the most common macros to create all the public names as aliases, it makes sense for them to do so. Regarding the Bessel function wrappers in this patch: only float and double wrappers are changed because the long double wrappers already used the weak alias pattern. Tested for x86_64, and with build-many-glibcs.py. * include/math.h (roundeven): Change hidden_proto call to __roundeven. * math/w_j0_compat.c (j0): Rename to __j0 and define as weak alias. [NO_LONG_DOUBLE] (__j0l): New strong alias. (y0): Rename to __y0 and define as weak alias. [NO_LONG_DOUBLE] (__y0l): New strong alias. * math/w_j0f_compat.c (j0f): Rename to __j0f and define as weak alias. (y0f): Rename to __y0f and define as weak alias. * math/w_j1_compat.c (j1): Rename to __j1 and define as weak alias. [NO_LONG_DOUBLE] (__j1l): New strong alias. (y1): Rename to __y1 and define as weak alias. [NO_LONG_DOUBLE] (__y1l): New strong alias. * math/w_j1f_compat.c (j1f): Rename to __j1f and define as weak alias. (y1f): Rename to __y1f and define as weak alias. * math/w_jn_compat.c (jn): Rename to __jn and define as weak alias. [NO_LONG_DOUBLE] (__jnl): New strong alias. (yn): Rename to __yn and define as weak alias. [NO_LONG_DOUBLE] (__ynl): New strong alias. * math/w_jnf_compat.c (jnf): Rename to __jnf and define as weak alias. (ynf): Rename to __ynf and define as weak alias. * sysdeps/ieee754/dbl-64/s_fromfp.c (FUNC): Define to __fromfp. (fromfp): Define as weak alias. [NO_LONG_DOUBLE] (__fromfpl): New strong alias. * sysdeps/ieee754/dbl-64/s_fromfpx.c (FUNC): Define to __fromfpx. (fromfpx): Define as weak alias. [NO_LONG_DOUBLE] (__fromfpxl): New strong alias. * sysdeps/ieee754/dbl-64/s_getpayload.c (getpayload): Rename to __getpayload and define as weak alias. [NO_LONG_DOUBLE] (__getpayloadl): New strong alias. * sysdeps/ieee754/dbl-64/s_roundeven.c (roundeven): Rename to __roundeven and define as weak alias. [NO_LONG_DOUBLE] (__roundevenl): New strong alias. * sysdeps/ieee754/dbl-64/s_setpayload.c (FUNC): Define to __setpayload. (setpayload): Define as weak alias. [NO_LONG_DOUBLE] (__setpayloadl): New strong alias. * sysdeps/ieee754/dbl-64/s_setpayloadsig.c (FUNC): Define to __setpayloadsig. (setpayloadsig): Define as weak alias. [NO_LONG_DOUBLE] (__setpayloadsigl): New strong alias. * sysdeps/ieee754/dbl-64/s_totalorder.c (totalorder): Rename to __totalorder and define as weak alias. [NO_LONG_DOUBLE] (__totalorderl): New strong alias. * sysdeps/ieee754/dbl-64/s_totalordermag.c (totalordermag): Rename to __totalordermag and define as weak alias. [NO_LONG_DOUBLE] (__totalordermagl): New strong alias. * sysdeps/ieee754/dbl-64/s_ufromfp.c (FUNC): Define to __ufromfp. (ufromfp): Define as weak alias. [NO_LONG_DOUBLE] (__ufromfpl): New strong alias. * sysdeps/ieee754/dbl-64/s_ufromfpx.c (FUNC): Define to __ufromfpx. (ufromfpx): Define as weak alias. [NO_LONG_DOUBLE] (__ufromfpxl): New strong alias. * sysdeps/ieee754/dbl-64/wordsize-64/s_getpayload.c (getpayload): Rename to __getpayload and define as weak alias. [NO_LONG_DOUBLE] (__getpayloadl): New strong alias. * sysdeps/ieee754/dbl-64/wordsize-64/s_roundeven.c (roundeven): Rename to __roundeven and define as weak alias. [NO_LONG_DOUBLE] (__roundevenl): New strong alias. * sysdeps/ieee754/dbl-64/wordsize-64/s_totalorder.c (totalorder): Rename to __totalorder and define as weak alias. [NO_LONG_DOUBLE] (__totalorderl): New strong alias. * sysdeps/ieee754/dbl-64/wordsize-64/s_totalordermag.c (totalordermag): Rename to __totalordermag and define as weak alias. [NO_LONG_DOUBLE] (__totalordermagl): New strong alias. * sysdeps/ieee754/float128/float128_private.h (__getpayloadl): New macro. (__roundevenl): Likewise. (__totalorderl): Likewise. (__totalordermagl): Likewise * sysdeps/ieee754/float128/s_fromfpf128.c (FUNC): Define to __fromfpf128. (fromfpf128): Define as weak alias. * sysdeps/ieee754/float128/s_fromfpxf128.c (FUNC): Define to __fromfpxf128. (fromfpxf128): Define as weak alias. * sysdeps/ieee754/float128/s_setpayloadf128.c (FUNC): Define to __setpayloadf128. (setpayloadf128): Define as weak alias. * sysdeps/ieee754/float128/s_setpayloadsigf128.c (FUNC): Define to __setpayloadsigf128. (setpayloadsigf128): Define as weak alias. * sysdeps/ieee754/float128/s_ufromfpf128.c (FUNC): Define to __ufromfpf128. (ufromfpf128): Define as weak alias. * sysdeps/ieee754/float128/s_ufromfpxf128.c (FUNC): Define to __ufromfpxf128. (ufromfpxf128): Define as weak alias. * sysdeps/ieee754/flt-32/s_fromfpf.c (FUNC): Define to __fromfpf. (fromfpf): Define as weak alias. * sysdeps/ieee754/flt-32/s_fromfpxf.c (FUNC): Define to __fromfpxf. (fromfpxf): Define as weak alias. * sysdeps/ieee754/flt-32/s_getpayloadf.c (getpayloadf): Rename to __getpayloadf and define as weak alias. * sysdeps/ieee754/flt-32/s_roundevenf.c (roundevenf): Rename to __roundevenf and define as weak alias. * sysdeps/ieee754/flt-32/s_setpayloadf.c (FUNC): Define to __setpayloadf. (setpayloadf): Define as weak alias. * sysdeps/ieee754/flt-32/s_setpayloadsigf.c (FUNC): Define to __setpayloadsigf. (setpayloadsigf): Define as weak alias. * sysdeps/ieee754/flt-32/s_totalorderf.c (totalorderf): Rename to __totalorderf and define as weak alias. * sysdeps/ieee754/flt-32/s_totalordermagf.c (totalordermagf): Rename to __totalordermagf and define as weak alias. * sysdeps/ieee754/flt-32/s_ufromfpf.c (FUNC): Define to __ufromfpf. (ufromfpf): Define as weak alias. * sysdeps/ieee754/flt-32/s_ufromfpxf.c (FUNC): Define to __ufromfpxf. (ufromfpxf): Define as weak alias. * sysdeps/ieee754/ldbl-128/s_fromfpl.c (FUNC): Define to __fromfpl. (fromfpl): Define as weak alias. * sysdeps/ieee754/ldbl-128/s_fromfpxl.c (FUNC): Define to __fromfpxl. (fromfpxl): Define as weak alias. * sysdeps/ieee754/ldbl-128/s_getpayloadl.c (getpayloadl): Rename to __getpayloadl and define as weak alias. * sysdeps/ieee754/ldbl-128/s_roundevenl.c (roundevenl): Rename to __roundevenl and define as weak alias. * sysdeps/ieee754/ldbl-128/s_setpayloadl.c (FUNC): Define to __setpayloadl. (setpayloadl): Define as weak alias. * sysdeps/ieee754/ldbl-128/s_setpayloadsigl.c (FUNC): Define to __setpayloadsigl. (setpayloadsigl): Define as weak alias. * sysdeps/ieee754/ldbl-128/s_totalorderl.c (totalorderl): Rename to __totalorderl and define as weak alias. * sysdeps/ieee754/ldbl-128/s_totalordermagl.c (totalordermagl): Rename to __totalordermagl and define as weak alias. * sysdeps/ieee754/ldbl-128/s_ufromfpl.c (FUNC): Define to __ufromfpl. (ufromfpl): Define as weak alias. * sysdeps/ieee754/ldbl-128/s_ufromfpxl.c (FUNC): Define to __ufromfpxl. (ufromfpxl): Define as weak alias. * sysdeps/ieee754/ldbl-128ibm/s_fromfpl.c (FUNC): Define to __fromfpl. (fromfpl): Define as weak alias. * sysdeps/ieee754/ldbl-128ibm/s_fromfpxl.c (FUNC): Define to __fromfpxl. (fromfpxl): Define as weak alias. * sysdeps/ieee754/ldbl-128ibm/s_getpayloadl.c (getpayloadl): Rename to __getpayloadl and define as weak alias. * sysdeps/ieee754/ldbl-128ibm/s_roundevenl.c (roundevenl): Rename to __roundevenl and define as weak alias. Call __roundeven instead of roundeven. * sysdeps/ieee754/ldbl-128ibm/s_setpayloadl.c (FUNC): Define to __setpayloadl. (setpayloadl): Define as weak alias. * sysdeps/ieee754/ldbl-128ibm/s_setpayloadsigl.c (FUNC): Define to __setpayloadsigl. (setpayloadsigl): Define as weak alias. * sysdeps/ieee754/ldbl-128ibm/s_totalorderl.c (totalorderl): Rename to __totalorderl and define as weak alias. * sysdeps/ieee754/ldbl-128ibm/s_totalordermagl.c (totalordermagl): Rename to __totalordermagl and define as weak alias. * sysdeps/ieee754/ldbl-128ibm/s_ufromfpl.c (FUNC): Define to __ufromfpl. (ufromfpl): Define as weak alias. * sysdeps/ieee754/ldbl-128ibm/s_ufromfpxl.c (FUNC): Define to __ufromfpxl. (ufromfpxl): Define as weak alias. * sysdeps/ieee754/ldbl-96/s_fromfpl.c (FUNC): Define to __fromfpl. (fromfpl): Define as weak alias. * sysdeps/ieee754/ldbl-96/s_fromfpxl.c (FUNC): Define to __fromfpxl. (fromfpxl): Define as weak alias. * sysdeps/ieee754/ldbl-96/s_getpayloadl.c (getpayloadl): Rename to __getpayloadl and define as weak alias. * sysdeps/ieee754/ldbl-96/s_roundevenl.c (roundevenl): Rename to __roundevenl and define as weak alias. * sysdeps/ieee754/ldbl-96/s_setpayloadl.c (FUNC): Define to __setpayloadl. (setpayloadl): Define as weak alias. * sysdeps/ieee754/ldbl-96/s_setpayloadsigl.c (FUNC): Define to __setpayloadsigl. (setpayloadsigl): Define as weak alias. * sysdeps/ieee754/ldbl-96/s_totalorderl.c (totalorderl): Rename to __totalorderl and define as weak alias. * sysdeps/ieee754/ldbl-96/s_totalordermagl.c (totalordermagl): Rename to __totalordermagl and define as weak alias. * sysdeps/ieee754/ldbl-96/s_ufromfpl.c (FUNC): Define to __ufromfpl. (ufromfpl): Define as weak alias. * sysdeps/ieee754/ldbl-96/s_ufromfpxl.c (FUNC): Define to __ufromfpxl. (ufromfpxl): Define as weak alias.
* Update copyright dates with scripts/update-copyrights.Joseph Myers2017-01-011-1/+1
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* Add roundeven, roundevenf, roundevenl.Joseph Myers2016-12-211-0/+68
TS 18661-1 defines roundeven functions that round a floating-point number to the nearest integer, in that floating-point type, with ties rounding to even (whereas the round functions round ties away from zero). As with other such functions, they raise no exceptions apart from "invalid" for signaling NaNs. There was a previous user request for this functionality in glibc in <https://sourceware.org/ml/libc-help/2015-02/msg00005.html>. This patch implements these functions for glibc. The implementations use integer bit-manipulation (or roundeven on the high and low parts, in the IBM long double case). It's possible that there may be faster approaches on some architectures (in particular, on AArch64 the frintn instruction should do exactly what's required); I'll leave it to architecture maintainers or others interested to implement such architecture-specific versions if desired. (Where architectures have instructions to round to nearest integer in the current rounding mode, implementations saving and restoring the rounding mode - and dealing with exceptions if those instructions generate "inexact" - are also possible, though their performance depends on the cost of manipulating exceptions / rounding mode state.) Tested for x86_64, x86, mips64 and powerpc. * math/bits/mathcalls.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (roundeven): New declaration. * math/tgmath.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (roundeven): New macro. * math/Versions (roundeven): New libm symbol at version GLIBC_2.25. (roundevenf): Likewise. (roundevenl): Likewise. * math/Makefile (libm-calls): Add s_roundevenF. * math/libm-test.inc (roundeven_test_data): New array. (roundeven_test): New function. (main): Call roundeven_test. * math/test-tgmath.c (NCALLS): Increase to 134. (F(compile_test)): Call roundeven. (F(roundeven)): New function. * manual/arith.texi (Rounding Functions): Document roundeven, roundevenf and roundevenl. * manual/libm-err-tab.pl (@all_functions): Add roundeven. * include/math.h (roundeven): Use libm_hidden_proto. * sysdeps/ieee754/dbl-64/s_roundeven.c: New file. * sysdeps/ieee754/dbl-64/wordsize-64/s_roundeven.c: Likewise. * sysdeps/ieee754/flt-32/s_roundevenf.c: Likewise. * sysdeps/ieee754/ldbl-128/s_roundevenl.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/s_roundevenl.c: Likewise. * sysdeps/ieee754/ldbl-96/s_roundevenl.c: Likewise. * sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add roundeven. (CFLAGS-nldbl-roundeven.c): New variable. * sysdeps/ieee754/ldbl-opt/nldbl-roundeven.c: New file. * sysdeps/nacl/libm.abilist: Update. * sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
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