Bruce Evans 74bbe8ed42 Fixed range reduction for large multiples of pi/2 on systems with ... broken assignment to floats (e.g., i386 with gcc -O, but not amd64 or ia64; i386 with gcc -O0 worked accidentally). Use an unnamed volatile temporary variable to trick gcc -O into clipping extra precision on assignment. It's surprising that only 1 place needed to be changed. For tanf() on i386 with gcc -O, the bug caused errors > 1 ulp with a density of 2.3% for args larger in magnitude than 128*pi/2, with a maximum error of 1.624 ulps. After this fix, exhaustive testing shows that range reduction for floats works as intended assuming that it is in within a factor of about 2^16 of working as intended for doubles. It provides >= 8 extra bits of precision for all ranges. On i386: range max error in double/single ulps extra precision ----- ------------------------------- --------------- 0 to 3*pi/4 0x000d3132 / 0.0016 9+ bits 3*pi/4 to 128*pi/2 0x00160445 / 0.0027 8+ 128*pi/2 to +Inf 0x00000030 / 0.00000009 23+ 128*pi/2 up, -O0 before fix 0x00000030 / 0.00000009 23+ 128*pi/2 up, -O1 before fix 0x10000000 / 0.5 1 The 23+ bits of extra precision for large multiples corresponds to almost perfect reduction to a pair of floats (24 extra would be perfect). After this fix, the maximum relative error (relative to the corresponding fdlibm double precision function) is < 1 ulp for all basic trig functions on all 2^32 float args on all machines tested: amd64 ia64 i386-O0 i386-O1 ------ ------ ------ ------ cosf: 0.8681 0.8681 0.7927 0.5650 sinf: 0.8733 0.8610 0.7849 0.5651 tanf: 0.9708 0.9329 0.9329 0.7035		2005-10-11 07:56:05 +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	signed/unsigned fixes (thanks to GCC4) and a few related minor style corrections.	2005-09-24 21:15:00 +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	Fix a long line in copyright notice.	2005-10-03 14:43:27 +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	Merge two slice_type_name() functions.	2005-04-13 13:42:38 +00:00
libedit	Merge makelist rev 1.10 and map.c rev 1.22 from NetBSD. They just patch the	2005-10-04 21:59:29 +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
libipsec	Bump the shared library version number of all libraries that have not	2005-07-22 17:19:05 +00:00
libipx
libkiconv	- Fix checking range of strings of struct iconv_add_in in libsmb and libkiconv,	2005-08-24 12:38:26 +00:00
libkse	Modify the code path of the ifdef NOTYET part of _kse_single_thread():	2005-09-24 01:19:53 +00:00
libkvm	libkvm bits for arm.	2005-10-03 14:21:14 +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
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	Bump the shared library version number of all libraries that have not	2005-07-22 17:19:05 +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	Modify the code path of the ifdef NOTYET part of _kse_single_thread():	2005-09-24 01:19:53 +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
libsmutil
libstand	Add -mno-sse3 for prescott/nocona	2005-07-15 12:29:31 +00:00
libtacplus	Bump the shared library version number of all libraries that have not	2005-07-22 17:19:05 +00:00
libtelnet
libthr	The pthread_attr_set_createsuspend_np was broken, fix it by	2005-10-10 12:15:07 +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	Fixed range reduction for large multiples of pi/2 on systems with	2005-10-11 07:56:05 +00:00
ncurses	Bump the shared library version number of all libraries that have not	2005-07-22 17:19:05 +00:00
Makefile	Connect smbfs build on powerpc.	2005-09-19 08:13:43 +00:00
Makefile.inc	Bump the shared library version number of all libraries that have not	2005-07-22 17:19:05 +00:00