freebsd-src/lib/msun
Bruce Evans fd2891004d Oops, on amd64 (and probably on all non-i386 systems), the previous
commit broke the 2**24 cases where |x| > DBL_MAX/2.  There are exponent
range problems not just for denormals (underflow) but for large values
(overflow).  Doubles have more than enough exponent range to avoid the
problems, but I forgot to convert enough terms to double, so there was
an x+x term which was sometimes evaluated in float precision.

Unfortunately, this is a pessimization with some combinations of systems
and compilers (it makes no difference on Athlon XP's, but on Athlon64's
it gives a 5% pessimization with gcc-3.4 but not with gcc-3.3).

Exlain the problem better in comments.
2006-01-05 09:18:48 +00:00
..
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 Oops, on amd64 (and probably on all non-i386 systems), the previous 2006-01-05 09:18:48 +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