glibc/sysdeps/mach
Joseph Myers 90f0ac10a7 Add fmaximum, fminimum functions
C2X adds new <math.h> functions for floating-point maximum and
minimum, corresponding to the new operations that were added in IEEE
754-2019 because of concerns about the old operations not being
associative in the presence of signaling NaNs.  fmaximum and fminimum
handle NaNs like most <math.h> functions (any NaN argument means the
result is a quiet NaN).  fmaximum_num and fminimum_num handle both
quiet and signaling NaNs the way fmax and fmin handle quiet NaNs (if
one argument is a number and the other is a NaN, return the number),
but still raise "invalid" for a signaling NaN argument, making them
exceptions to the normal rule that a function with a floating-point
result raising "invalid" also returns a quiet NaN.  fmaximum_mag,
fminimum_mag, fmaximum_mag_num and fminimum_mag_num are corresponding
functions returning the argument with greatest or least absolute
value.  All these functions also treat +0 as greater than -0.  There
are also corresponding <tgmath.h> type-generic macros.

Add these functions to glibc.  The implementations use type-generic
templates based on those for fmax, fmin, fmaxmag and fminmag, and test
inputs are based on those for those functions with appropriate
adjustments to the expected results.  The RISC-V maintainers might
wish to add optimized versions of fmaximum_num and fminimum_num (for
float and double), since RISC-V (F extension version 2.2 and later)
provides instructions corresponding to those functions - though it
might be at least as useful to add architecture-independent built-in
functions to GCC and teach the RISC-V back end to expand those
functions inline, which is what you generally want for functions that
can be implemented with a single instruction.

Tested for x86_64 and x86, and with build-many-glibcs.py.
2021-09-28 23:31:35 +00:00
..
htl Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
hurd Add fmaximum, fminimum functions 2021-09-28 23:31:35 +00:00
i386 Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
include hurd: break relocation loop between libc.so and lib{mach,hurd}user.so 2020-11-14 00:52:52 +01:00
sys Installed-header hygiene (BZ#20366): obsolete BSD u_* types. 2016-09-23 08:43:56 -04:00
_strerror.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
adjtime.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
clock_gettime.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
clock_nanosleep.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
configure configure: Replaced obsolete AC_TRY_COMPILE 2021-06-04 10:16:00 -03:00
configure.ac configure: Replaced obsolete AC_TRY_COMPILE 2021-06-04 10:16:00 -03:00
getloadavg.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
getpagesize.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
getsysstats.c misc: Add __get_nprocs_sched 2021-09-27 09:13:06 -03:00
libc-lock.h mach lll_lock/unlock: Explicitly request private locking 2021-09-15 01:36:08 +02:00
libmachuser.abilist hurd: add base abilist files 2018-01-28 17:26:35 +01:00
Makefile Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
mprotect.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
msync.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
munmap.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
pagecopy.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
readonly-area.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
sched_yield.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
sleep.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
strerror_l.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
Subdirs * Makefile (subdir-target-args): New variable. 2006-02-28 07:11:04 +00:00
sysdep.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
thread_state.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
usleep.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
xpg-strerror.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00