[Cfp-interest 1896] fmax, fmin

[Fred J. Tydeman]

Background.

IEEE 754-2008 had minNum, minNumMag, maxNum, and maxNumMag operations.
Some of these were added to C99 as fmin and fmax.

WG14/N1137 Technical Report 24732 added fmind32/64/128 and fmaxd32/64/128.

They have been replaced in IEEE 754-2019 with minimum, minimumNumber,
maximum, and maximumNumber, minimumMagnitude, minimumMagnitudeNumber,
maximumMagnitude, and maximumMagnitudeNumber.  These have been added
to C23; some with shorter names.

The following changes are against WG14 N2596 C23 draft.

Move 7.12.12.11#4 
<blockquote>
NOTE The fmax and fmin functions are similar to the fmaximum_num and
fminimum_num functions, though may differ in which signed zero is
returned when the arguments are differently signed zeros and in their
treatment of signaling NaNs (see F.10.9.5).
</blockquote>
to between 7.12.12 and 7.12.12.1.

7.25#15: Replace <del>fmax</del> with <ins>fmaximum</ins> in three places

7.31.8: Maybe add something about fmin and fmax should not be used in
new code; instead use fminimum_num and fmaximum_num.

F.3#1: Remove fmax and fmin from the Operation binding table.

F.3#3:  Maybe add something like:  These functions have been
superseded by fminimum_num and fmaximum_num.

G.5.1#8: Replace <del>fmax</del> with <ins>fmaximum_num</ins>.

WG14 N2601 Part 3 as annex X

In 7.12.11 Manipulation functions, remove:
fmaxfN
fmaxfNx
fmaxdN
fmaxdNx

fminfN
fminfNx
fmindN
fmindNx


---
Fred J. Tydeman        Tydeman Consulting
tydeman at tybor.com      Testing, numerics, programming
+1 (702) 608-6093      Vice-chair of PL22.11 (ANSI "C")
Sample C99+FPCE tests: http://www.tybor.com
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