Bruce Evans efff995f3b Use a 53-bit approximation to pi/2 instead of a 33+53 bit one for the ... special case pi/4 <= |x| < 3*pi/4. This gives a tiny optimization (it saves 2 subtractions, which are scheduled well so they take a whole 1 cycle extra on an AthlonXP), and simplifies the code so that the following optimization is not so ugly. Optimize for the range 3*pi/4 < |x| < 9*Pi/2 in the same way. On Athlon{XP,64} systems, this gives a 25-40% optimization (depending a lot on CFLAGS) for the cosf() and sinf() consumers on this range. Relative to i387 hardware fcos and fsin, it makes the software versions faster in most cases instead of slower in most cases. The relative optimization is smaller for tanf() the inefficient part is elsewhere. The 53-bit approximation to pi/2 is good enough for pi/4 <= |x| < 3*pi/4 because after losing up to 24 bits to subtraction, we still have 29 bits of precision and only need 25 bits. Even with only 5 extra bits, it is possible to get perfectly rounded results starting with the reduced x, since if x is nearly a multiple of pi/2 then x is not near a half-way case and if x is not nearly a multiple of pi/2 then we don't lose many bits. With our intentionally imperfect rounding we get the same results for cosf(), sinf() and tanf() as without this optimization.		2005-11-06 17:48:02 +00:00
..
bind	Disable thread support in BIND. It appears to reduce performance rather	2005-07-25 14:44:11 +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	Fix installworld breakage. <sigh>	2005-10-14 16:32:50 +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	Document the fact that sendfile(2) can EOPNOTSUPP if the underlying	2005-10-31 04:08:28 +00:00
libc_r	- Prefix MUTEX_TYPE_MAX with PTHREAD_ to avoid namespace pollution.	2005-08-19 21:31:42 +00:00
libcalendar	Mechanically kill hard sentence breaks.	2004-07-02 23:52:20 +00:00
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	Merge two slice_type_name() functions.	2005-04-13 13:42:38 +00:00
libedit	Add el_get to the NAME section.	2005-10-20 08:26:03 +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
libftpio	Bump the shared library version number of all libraries that have not	2005-07-22 17:19:05 +00:00
libgeom	Check for NULL pointer return.	2005-05-24 10:10:38 +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	Include files thr_condattr_pshared.c and thr_mattr_pshare.c.	2005-10-24 05:48:32 +00:00
libkvm	Fix a well duplicated fencepost error that stopped crashdumps being	2005-10-20 05:41:38 +00:00
libmagic	Bump the shared library version number of all libraries that have not	2005-07-22 17:19:05 +00:00
libmd	Correct type.	2005-09-14 10:42:51 +00:00
libmemstat	The "Mbuf" zone was renamed "mbuf" to improve consistency, but the code	2005-08-15 10:24:20 +00:00
libmenu
libmilter	NOINET6 -> NO_INET6	2004-12-21 10:49:29 +00:00
libmp	Bump the shared library version number of all libraries that have not	2005-07-22 17:19:05 +00:00
libncp	Bump the shared library version number of all libraries that have not	2005-07-22 17:19:05 +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
libpcap	bump SHLIB_MAJOR as libpcap refers getnetbyname(3).	2005-06-03 09:41:26 +00:00
libpmc	Add COMPATIBILITY and HISTORY sections.	2005-07-21 06:44:54 +00:00
libpthread	Include files thr_condattr_pshared.c and thr_mattr_pshare.c.	2005-10-24 05:48:32 +00:00
libradius	Bump the shared library version number of all libraries that have not	2005-07-22 17:19:05 +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	Bump the shared library version number of all libraries that have not	2005-07-22 17:19:05 +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	Implement the full range of ISO9660 number conversion routines in iso.h.	2005-10-18 13:35:08 +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	Bump the shared library version number of all libraries that have not	2005-07-22 17:19:05 +00:00
libutil	When removing the local domain, only do so when the result will be a	2005-10-05 04:42:20 +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 a 53-bit approximation to pi/2 instead of a 33+53 bit one for the	2005-11-06 17:48:02 +00:00
ncurses	Bump the shared library version number of all libraries that have not	2005-07-22 17:19:05 +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