K 10
svn:author
V 3
bde
K 8
svn:date
V 27
2008-02-06T06:35:21.000000Z
K 7
svn:log
V 611
As for the float trig functions and logf, use a minimax polynomial
that is specialized for float precision.  The new polynomial has degree
5 instead of 11, and a maximum error of 2**-27.74 ulps instead
of 2**-30.64.  This doesn't affect the final error significantly; the
maximum error was and is about 0.9101 ulps on amd64 -01 and the number
of cases with an error of > 0.5 ulps is actually reduced by epsilon
despite the larger error in the polynomial.

This is about 15% faster on amd64 (A64), i386 (A64) and ia64.  The asm
version is still used instead of this on i386 since it is faster and
more accurate.

END