[PATCH 1/4] Document _FloatN and _FloatNx versions of math functions

[Joseph Myers]

There seems to be a lot of documentation missing here.  E.g. of the M_* 
constants, or the HUGE_VAL constants, or of the various libm functions for 
which the float / double / long double variants are documented in 
arith.texi.  (As part of or in preparation for such documentation, you 
should probably change the documentation that describes drem as primary, 
remainder as an alternative name to describe remainder as primary, drem as 
an alternative name.)

-- 
Joseph S. Myers
joseph@codesourcery.com