K 10
svn:author
V 3
bde
K 8
svn:date
V 27
2005-11-28T06:15:10.000000Z
K 7
svn:log
V 378
Exploit skew-symmetry to avoid an operation: -sin(x-A) = sin(A-x).  This
gives a tiny but hopefully always free optimization in the 2 quadrants
to which it applies.  On Athlons, it reduces maximum latency by 4 cycles
in these quadrants but has usually has a smaller effect on total time
(typically ~2 cycles (~5%), but sometimes 8 cycles when the compiler
generates poor code).

END