src/lib/msun/man, branch main

msun/math.3: reference new functions f{max,min}imum{,_num,_mag}()

2026-04-11T18:09:13+00:00

See also:	D55834, D56236
MFC after:	1 month

lib/msun: Added fmaximum_mag and fmaximum_num families

2026-04-11T18:09:13+00:00

Added support for the f{maximum,minimum}_{mag,num} families, the new
C23 standard functions for maximum magnitude and number-preferring
maximum.  This includes modifying fmax.3, on top of D56230, to
recommend the use of fmaximum_num and fminimum_num.

Reviewed by:	fuz, kargl
MFC after:	1 month
Differential Revision:	https://reviews.freebsd.org/D56236

fmax.3: Add caveat for going beyond C std requirements

2026-04-06T17:00:15+00:00

libm's fmax and fmin family of functions treat +0.0 as greater than
-0.0.  This is not required by the C standard, so the user may not see
this behaviour due to compiler optimization.

PR:		294214
Reviewed by:	fuz
Sponsored by:	The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D56230

lib/msun: Added fmaximum and fminimum family. Tests and man page

2026-04-04T16:52:40+00:00

Starting from the existing fmax{,f,l} functions I've added the fmaximum
family, which handles NaN according to the newest standard (propagating
it).

This commit is a PoC for GSoC 2026.

Reviewed by:	fuz, kargl
MFC after:	1 month
Differential Revision:	https://reviews.freebsd.org/D55834

msun: document that {sin,cos,tan}pi(3) follow C23

2025-11-17T17:18:46+00:00

 - also use new .St -ieee754-2008 request in *pi.3

Reviewed by:	imp
Approved by	markj (mentor)
See also:	D53784
Differential Revision:	https://reviews.freebsd.org/D53783

manuals: Fix some .Bl -tag lists

2024-11-18T17:30:40+00:00

Signed-off-by:	Graham Percival 
Reviewed by:	mhorne, Alexander Ziaee 
MFC after:	3 days
Sponsored by:	Tarsnap Backup Inc.
Pull Request:	https://github.com/freebsd/freebsd-src/pull/1528

erf.3: Add a STANDARDS section

2024-06-23T10:50:47+00:00

Add a STANDARDS section for the erf(3) manual page.

PR:	273413
Reviewed by:	pauamma_gundo.com
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D44140

Now that D44168 has been merged to stable/14, update the manpage

2024-04-12T15:33:54+00:00

to correctly reflect history.

lib/msun: Fix tgammal(3) on IEEE 128-bit platforms

2024-03-18T09:48:43+00:00

Undo the 80-bit "stub" implementation of the 128-bit long double
tgammal(3) function. The latest (as of Feb 2024) version of the
src/contrib/arm-optimised-routines library includes a standalone,
full 128-bit replacement. This needs a small bit of wrapping to
fit it in, but is otherwise a drop-in replacement.

Testing this is hard, as most maths packages blow up as soon as
their 80-bit floating-point capability is exceeded. With 128-bit
tgammal(), this is easy to do, and this is the range that needs to
be checked the most carefully. Using my copy of Maple, I was able
to check that the output was within a few ULP of the correct answer,
right up to the point of 128-bit over- and underflow. Additionally,
the results are no worse, and indeed better than the 80-bit version.

Steve Kargl sent me his libm testing code, which I used to verify
that the excpetions for certain key values were correct. Tested in
this case were +-Inf, +-NaN, +-1 and +-0.

Differential Revision:	https://reviews.freebsd.org/D44168
Reviewed by:	theraven, andrew, imp

lib: Remove ancient SCCS tags.

2023-11-27T05:23:28+00:00

Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl script.

Sponsored by:		Netflix