Bruce Evans c5964538b7 Use a minimax polynomial approximation instead of a Pade rational ... function approximation for the second step. The polynomial has degree 2 for cbrtf() and 4 for cbrt(). These degrees are minimal for the final accuracy to be essentially the same as before (slightly smaller). Adjust the rounding between steps 2 and 3 to match. Unfortunately, for cbrt(), this breaks the claimed accuracy slightly although incorrect rounding doesn't. Claim less accuracy since its not worth pessimizing the polynomial or relying on exhaustive testing to get insignificantly more accuracy. This saves about 30 cycles on Athlons (mainly by avoiding 2 divisions) so it gives an overall optimization in the 10-25% range (a larger percentage for float precision, especially in 32-bit mode, since other overheads are more dominant for double precision, surprisingly more in 32-bit mode).		2005-12-19 00:22:03 +00:00
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alpha	Replace fegetmask() and fesetmask() with feenableexcept(),	2005-03-16 19:03:46 +00:00
amd64	Add a missing ldexpf() alias for amd64.	2005-09-12 20:54:00 +00:00
arm	Replace fegetmask() and fesetmask() with feenableexcept(),	2005-03-16 19:03:46 +00:00
bsdsrc	Removed an unused declaration which was so old that it wasn't a prototype	2005-11-18 05:03:12 +00:00
i387	Fixed some comments added in rev.1.5.	2005-10-30 12:21:02 +00:00
ia64	Replace fegetmask() and fesetmask() with feenableexcept(),	2005-03-16 19:03:46 +00:00
man	s/5.5/6.0/ in HISTORY section.	2005-11-24 09:25:10 +00:00
powerpc	Replace fegetmask() and fesetmask() with feenableexcept(),	2005-03-16 19:03:46 +00:00
sparc64	Replace fegetmask() and fesetmask() with feenableexcept(),	2005-03-16 19:03:46 +00:00
src	Use a minimax polynomial approximation instead of a Pade rational	2005-12-19 00:22:03 +00:00
Makefile	Detach k_rem_pio2f.c from the build since it is now unused. It is a libm	2005-11-06 17:59:40 +00:00