Index: article.xml
===================================================================
--- article.xml
+++ article.xml
@@ -547,7 +547,7 @@
FreeBSD traces its roots back nearly twenty years to the
work of the Computer Science Research Group at the
University of California Berkeley.
- FreeBSD's source
+ FreeBSD's source
repository contains a history of the project
since its inception, and there are CDROMs
available that contain earlier code from the
@@ -581,28 +581,22 @@
A sample change log entry
-bde 2005-10-29 16:34:50 UTC
+r151864 | bde | 2005-10-29 09:34:50 -0700 (Sat, 29 Oct 2005) | 13 lines
+Changed paths:
+ M /head/lib/msun/src/e_rem_pio2f.c
- FreeBSD src repository
+Use double precision to simplify and optimize arg reduction for small
+and medium size args too: instead of conditionally subtracting a float
+17+24, 17+17+24 or 17+17+17+24 bit approximation to pi/2, always
+subtract a double 33+53 bit one. The float version is now closer to
+the double version than to old versions of itself -- it uses the same
+33+53 bit approximation as the simplest cases in the double version,
+and where the float version had to switch to the slow general case at
+|x| == 2^7*pi/2, it now switches at |x| == 2^19*pi/2 the same as the
+double version.
- Modified files:
- lib/msun/src e_rem_pio2f.c
- Log:
- Use double precision to simplify and optimize arg reduction for small
- and medium size args too: instead of conditionally subtracting a float
- 17+24, 17+17+24 or 17+17+17+24 bit approximation to pi/2, always
- subtract a double 33+53 bit one. The float version is now closer to
- the double version than to old versions of itself — it uses the same
- 33+53 bit approximation as the simplest cases in the double version,
- and where the float version had to switch to the slow general case at
- |x| == 2^7*pi/2, it now switches at |x| == 2^19*pi/2 the same as the
- double version.
-
- This speeds up arg reduction by a factor of 2 for |x| between 3*pi/4 and
- 2^7*pi/4, and by a factor of 7 for |x| between 2^7*pi/4 and 2^19*pi/4.
-
- Revision Changes Path
- 1.14 +22 -97 src/lib/msun/src/e_rem_pio2f.c
+This speeds up arg reduction by a factor of 2 for |x| between 3*pi/4 and
+2^7*pi/4, and by a factor of 7 for |x| between 2^7*pi/4 and 2^19*pi/4.
@@ -632,9 +626,9 @@
FreeBSD. For example:Track FreeBSD source code
- The project makes it easy to mirror its CVS
- repository using CVSup. Having
+ The project makes it easy to mirror its SVN
+ repository using svnsync. Having
the complete history of the source is useful when
debugging complex problems and offers valuable insight
into the intentions of the original developers. Use a
@@ -642,43 +636,32 @@
easily merge changes between the upstream FreeBSD code
base and your own in-house code.
- shows a portion of
+ shows a portion of
an annotated listing of the file referenced by the
change log in . The
ancestry of each line of the source is clearly visible.
Annotated listings showing the history of every file
- that is part of FreeBSD are available on the
+ that is part of FreeBSD are available on the
web.
-
- An annotated source listing generated using <command>cvs annotate</command>
+
+ An annotated source listing generated using <command>svn blame</command>
0) {
-75 1.15 (bde 06-Nov-05): z = x - pio2;
-76 1.15 (bde 06-Nov-05): n = 1;
-77 1.15 (bde 06-Nov-05): } else {
-78 1.15 (bde 06-Nov-05): z = x + pio2;
-79 1.15 (bde 06-Nov-05): n = 3;
-80 1.9 (bde 08-Oct-05): }
-81 1.15 (bde 06-Nov-05): y[0] = z;
-82 1.15 (bde 06-Nov-05): y[1] = z - y[0];
-83 1.15 (bde 06-Nov-05): return n;
-84 1.15 (bde 06-Nov-05): }
-85 1.15 (bde 06-Nov-05): if(ix<0x407b53d1) { /* |x| < 5*pi/4, special case with n=+-2 */
+176410 bde 2008-02-19 07:42:46 -0800 (Tue, 19 Feb 2008) #include
+176410 bde 2008-02-19 07:42:46 -0800 (Tue, 19 Feb 2008) __FBSDID("$FreeBSD$");
+ 2116 jkh 1994-08-19 02:40:01 -0700 (Fri, 19 Aug 1994)
+ 2116 jkh 1994-08-19 02:40:01 -0700 (Fri, 19 Aug 1994) /* __ieee754_rem_pio2f(x,y)
+ 8870 rgrimes 1995-05-29 22:51:47 -0700 (Mon, 29 May 1995) *
+176552 bde 2008-02-25 05:33:20 -0800 (Mon, 25 Feb 2008) * return the remainder of x rem pi/2 in *y
+176552 bde 2008-02-25 05:33:20 -0800 (Mon, 25 Feb 2008) * use double precision for everything except passing x
+152535 bde 2005-11-16 18:20:04 -0800 (Wed, 16 Nov 2005) * use __kernel_rem_pio2() for large x
+ 2116 jkh 1994-08-19 02:40:01 -0700 (Fri, 19 Aug 1994) */
+ 2116 jkh 1994-08-19 02:40:01 -0700 (Fri, 19 Aug 1994)
+176465 bde 2008-02-22 07:55:14 -0800 (Fri, 22 Feb 2008) #include
+176465 bde 2008-02-22 07:55:14 -0800 (Fri, 22 Feb 2008)
+ 2116 jkh 1994-08-19 02:40:01 -0700 (Fri, 19 Aug 1994) #include "math.h"
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