K 10
svn:author
V 3
das
K 8
svn:date
V 27
2011-10-15T05:23:28.370998Z
K 7
svn:log
V 680
Various changes to improve the accuracy and speed of log{2,10}{,f}.
- Rename __kernel_log() to k_log1p().
- Move some of the work that was previously done in the kernel log into
  the callers.  This enables further refactoring to improve accuracy or
  speed, although I don't recall the details.
- Use extra precision when adding the final scaling term, which improves
  accuracy.
- Describe and work around compiler problems that break some of the
  multiprecision calculations.

A fix for a small bug is also included:
- Add a special case for log*(1).  This is needed to ensure that log*(1) == +0
  instead of -0, even when the rounding mode is FE_DOWNWARD.

Submitted by:	bde

END