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8fdb019b17
freebsd-skq/lib
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bde 8fdb019b17 Use only double precision for "kernel" cosf and sinf (except for 
returning float).  The functions are renamed from __kernel_{cos,sin}f()
to __kernel_{cos,sin}df() so that misuses of them will cause link errors
and not crashes.

This version is an almost-routine translation with no special optimizations
for accuracy or efficiency.  The not-quite-routine part is that in
__kernel_cosf(), regenerating the minimax polynomial with double
precision coefficients gives a coefficient for the x**2 term that is
not quite -0.5, so the literal 0.5 in the code and the related `hz'
variable need to be modified; also, the special code for reducing the
error in 1.0-x**2*0.5 is no longer needed, so it is convenient to
adjust all the logic for the x**2 term a little.  Note that without
extra precision, it would be very bad to use a coefficient of other
than -0.5 for the x**2 term -- the old version depends on multiplication
by -0.5 being infinitely precise so as not to need even more special
code for reducing the error in 1-x**2*0.5.

This gives an unimportant increase in accuracy, from ~0.8 to ~0.501
ulps.  Almost all of the error is from the final rounding step, since
the choice of the minimax polynomials so that their contribution to the
error is a bit less than 0.5 ulps just happens to give contributions that
are significantly less (~.001 ulps).

An Athlons, for uniformly distributed args in [-2pi, 2pi], this gives
overall speed increases in the 10-20% range, despite giving a speed
decrease of typically 19% (from 31 cycles up to 37) for sinf() on args
in [-pi/4, pi/4].
2005-11-28 04:58:57 +00:00
..
bind Finish the removal of threads support in ../config.mk,v 1.15. 2005-11-07 15:22:35 +00:00
csu Fixed profiling of main() for amd64 and i386. This started rotting 2005-10-07 22:13:17 +00:00
libalias Bump the shared library version number of all libraries that have not 2005-07-22 17:19:05 +00:00
libarchive Portability: Remove AC_CHECK_MALLOC from configure.ac.in. 2005-11-27 03:16:46 +00:00
libatm Enforce style.Makefile(5). 2005-04-22 18:57:32 +00:00
libautofs Fix all the spelling mistakes I could find in the man pages for words 2005-07-31 03:30:48 +00:00
libbegemot Bump the shared library version number of all libraries that have not 2005-07-22 17:19:05 +00:00
libbluetooth Bump the shared library version number of all libraries that have not 2005-07-22 17:19:05 +00:00
libbsnmp Catch up with the import of bsnmp-1.11. Add a couple of new 2005-10-04 15:02:07 +00:00
libbz2 Bump the shared library version number of all libraries that have not 2005-07-22 17:19:05 +00:00
libc Implement following POSIX message queue interfaces: 2005-11-26 13:01:17 +00:00
libc_r - Prefix MUTEX_TYPE_MAX with PTHREAD_ to avoid namespace pollution. 2005-08-19 21:31:42 +00:00
libcalendar
libcam Better memory handling: 2005-07-13 10:40:07 +00:00
libcom_err
libcompat Expand contractions. 2005-02-13 23:45:54 +00:00
libcrypt Bump the shared library version number of all libraries that have not 2005-07-22 17:19:05 +00:00
libdevinfo Add __BEGIN_DECLS/__END_DECLS so that this header can be included in C++ 2005-08-31 14:57:39 +00:00
libdevstat Remove an unused variable. 2005-10-04 22:00:35 +00:00
libdisk Fix prototypes. 2005-11-24 10:30:44 +00:00
libedit Fix prototype. 2005-11-24 10:32:39 +00:00
libexpat Bump the shared library version number of all libraries that have not 2005-07-22 17:19:05 +00:00
libfetch Ignore HTTP_PROXY if it is defined but empty. This was already handled 2005-08-24 12:28:05 +00:00
libform Add missing shared library interdependencies. 2005-11-10 18:07:07 +00:00
libftpio Bump the shared library version number of all libraries that have not 2005-07-22 17:19:05 +00:00
libgeom Fix prototype. 2005-11-24 10:43:35 +00:00
libgpib Bump the shared library version number of all libraries that have not 2005-07-22 17:19:05 +00:00
libio Start the dreaded NOFOO -> NO_FOO conversion. 2004-12-21 08:47:35 +00:00
libipsec Bump the shared library version number of all libraries that have not 2005-07-22 17:19:05 +00:00
libipx Various markup and spelling fixes. 2004-12-29 02:18:24 +00:00
libkiconv - Fix checking range of strings of struct iconv_add_in in libsmb and libkiconv, 2005-08-24 12:38:26 +00:00
libkse o Include <sys/time.h> 2005-11-19 04:47:06 +00:00
libkvm Fix a well duplicated fencepost error that stopped crashdumps being 2005-10-20 05:41:38 +00:00
libmagic Add missing shared library interdependencies. 2005-11-10 18:07:07 +00:00
libmd -mdoc sweep. 2005-11-17 13:00:00 +00:00
libmemstat Tidy up markup and fix two bugs. 2005-11-21 17:18:34 +00:00
libmenu Add missing shared library interdependencies. 2005-11-10 18:07:07 +00:00
libmilter NOINET6 -> NO_INET6 2004-12-21 10:49:29 +00:00
libmp Add missing shared library interdependencies. 2005-11-10 18:07:07 +00:00
libncp Add missing shared library interdependencies. 2005-11-10 18:07:07 +00:00
libncurses Bump the shared library version number of all libraries that have not 2005-07-22 17:19:05 +00:00
libnetgraph Recognize all current standard node types. 2005-10-25 20:58:30 +00:00
libngatm Bump the shared library version number of all libraries that have not 2005-07-22 17:19:05 +00:00
libopie Bump the shared library version number of all libraries that have not 2005-07-22 17:19:05 +00:00
libpam Commenting out WARNS actually brought it up to 4. 2005-09-28 14:36:16 +00:00
libpanel Add missing shared library interdependencies. 2005-11-10 18:07:07 +00:00
libpcap bump SHLIB_MAJOR as libpcap refers getnetbyname(3). 2005-06-03 09:41:26 +00:00
libpmc Fix prototypes. 2005-11-24 10:54:47 +00:00
libpthread o Include <sys/time.h> 2005-11-19 04:47:06 +00:00
libradius Add missing shared library interdependencies. 2005-11-10 18:07:07 +00:00
librpcsvc Fix the source path. 2005-06-04 10:48:21 +00:00
libsbuf
libsdp Bump the shared library version number of all libraries that have not 2005-07-22 17:19:05 +00:00
libsm Add a new source file in sendmail 8.13.4 2005-06-07 04:18:25 +00:00
libsmb Add missing shared library interdependencies. 2005-11-10 18:07:07 +00:00
libsmdb For variables that are only checked with defined(), don't provide 2004-10-24 15:33:08 +00:00
libsmutil For variables that are only checked with defined(), don't provide 2004-10-24 15:33:08 +00:00
libstand Fix prototypes. 2005-11-24 11:14:06 +00:00
libtacplus Bump the shared library version number of all libraries that have not 2005-07-22 17:19:05 +00:00
libtelnet NOCRYPT -> NO_CRYPT 2004-12-21 10:16:04 +00:00
libthr Fix name compatible problem with POSIX standard. the sigval_ptr and 2005-11-04 09:41:00 +00:00
libthread_db Bump the shared library version number of all libraries that have not 2005-07-22 17:19:05 +00:00
libufs minor style.Makefile(5) fixes: 2005-09-26 06:23:43 +00:00
libugidfw Bump the shared library version number of all libraries that have not 2005-07-22 17:19:05 +00:00
libusbhid Fix prototypes. 2005-11-24 11:26:36 +00:00
libutil Fix prototype. 2005-11-24 11:29:11 +00:00
libvgl Bump the shared library version number of all libraries that have not 2005-07-22 17:19:05 +00:00
libwrap Bump the shared library version number of all libraries that have not 2005-07-22 17:19:05 +00:00
liby Drop useless with NO_PIC SHLIB_MAJOR. 2005-07-20 14:35:26 +00:00
libypclnt Bump the shared library version number of all libraries that have not 2005-07-22 17:19:05 +00:00
libz Correct a buffer overflow which can occur when decompressing a 2005-07-27 08:41:17 +00:00
msun Use only double precision for "kernel" cosf and sinf (except for 2005-11-28 04:58:57 +00:00
ncurses Add missing shared library interdependencies. 2005-11-10 18:07:07 +00:00
Makefile Disconnect libc_r from buildworld, it is still kept in the tree to 2005-10-27 03:09:20 +00:00
Makefile.inc Bump the shared library version number of all libraries that have not 2005-07-22 17:19:05 +00:00