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
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Implies
ld.abilist	ld.so: Do not export free/calloc/malloc/realloc functions [BZ #25486]	2020-02-15 11:01:23 +01:00
libanl.abilist	resolv: Move libanl into libc (if libpthread is in libc)	2021-07-02 11:45:00 +02:00
libBrokenLocale.abilist
libc_malloc_debug.abilist	Move malloc_{g,s}et_state to libc_malloc_debug	2021-07-22 18:38:10 +05:30
libc.abilist	socket: Add time64 alias for setsockopt	2021-07-22 19:16:26 +02:00
libcrypt.abilist
libdl.abilist	dlfcn: Move dlopen into libc	2021-06-03 08:26:04 +02:00
libm.abilist	Add fmaximum, fminimum functions	2021-09-28 23:31:35 +00:00
libnsl.abilist
libpthread.abilist	nptl: Remove remaining code from libpthread	2021-05-21 22:35:01 +02:00
libresolv.abilist	resolv: Move res_query functions into libc	2021-07-19 07:56:57 +02:00
librt.abilist	Linux: Move timer_settime, __timer_settime64 from librt to libc	2021-06-28 09:51:01 +02:00
libthread_db.abilist
libutil.abilist	login: Move libutil into libc	2021-06-30 08:43:37 +02:00