Date: Tue, 11 Nov 2014 08:01:42 +0000 (UTC) From: Jason Helfman <jgh@FreeBSD.org> To: doc-committers@freebsd.org, svn-doc-all@freebsd.org, svn-doc-head@freebsd.org Subject: svn commit: r45969 - head/en_US.ISO8859-1/articles/building-products Message-ID: <201411110801.sAB81goe016425@svn.freebsd.org>
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Author: jgh Date: Tue Nov 11 08:01:42 2014 New Revision: 45969 URL: https://svnweb.freebsd.org/changeset/doc/45969 Log: Update documentation now that CVSup service has been shutdown. PR: 194916 Differential Revision: https://reviews.freebsd.org/D1137 Approved by: emaste, remko (mentor) Modified: head/en_US.ISO8859-1/articles/building-products/article.xml Modified: head/en_US.ISO8859-1/articles/building-products/article.xml ============================================================================== --- head/en_US.ISO8859-1/articles/building-products/article.xml Tue Nov 11 06:06:24 2014 (r45968) +++ head/en_US.ISO8859-1/articles/building-products/article.xml Tue Nov 11 08:01:42 2014 (r45969) @@ -547,7 +547,7 @@ <para>FreeBSD traces its roots back nearly twenty years to the work of the Computer Science Research Group at the University of California Berkeley.<footnote> - <simpara>FreeBSD's <link xlink:href="http://cvsweb.freebsd.org/">source + <simpara>FreeBSD's <link xlink:href="http://svnweb.freebsd.org/">source repository</link> contains a history of the project since its inception, and there are <link xlink:href="http://www.mckusick.com/csrg/">CDROMs available</link> that contain earlier code from the @@ -581,28 +581,22 @@ <figure xml:id="fig-change-log"> <title>A sample change log entry</title> <programlisting> -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 + +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. - FreeBSD src repository - - 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. </programlisting> </figure> @@ -632,9 +626,9 @@ bde 2005-10-29 16:34:50 UTC FreeBSD. For example:</para> <formalpara> <title>Track FreeBSD source code</title> - <para>The project makes it easy to mirror its CVS - repository using <link xlink:href="&url.articles.cvsup-advanced;"><!-- - --><application>CVSup</application></link>. Having + <para>The project makes it easy to mirror its SVN + repository using <link xlink:href="&url.articles.committers-guide;/article.html#svn-advanced-use-setting-up-svnsync"><!-- + --><application>svnsync</application></link>. 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 @@ bde 2005-10-29 16:34:50 UTC easily merge changes between the upstream FreeBSD code base and your own in-house code.</para> </formalpara> - <para><xref linkend="fig-cvs-annotate"/> shows a portion of + <para><xref linkend="fig-svn-blame"/> shows a portion of an annotated listing of the file referenced by the change log in <xref linkend="fig-change-log"/>. 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 <link xlink:href="http://cvsweb.freebsd.org/">available on the + that is part of FreeBSD are <link xlink:href="http://svnweb.freebsd.org/">available on the web</link>.</para> - <figure xml:id="fig-cvs-annotate"> - <title>An annotated source listing generated using <command>cvs annotate</command></title> + <figure xml:id="fig-svn-blame"> + <title>An annotated source listing generated using <command>svn blame</command></title> <programlisting> <![CDATA[ -#LINE #REV #WHO #DATE #TEXT +#REV #WHO #DATE #TEXT -62 1.1 (jkh 19-Aug-94): int32_t __ieee754_rem_pio2f(float x, float *y) -63 1.1 (jkh 19-Aug-94): { -64 1.14 (bde 29-Oct-05): double z,w,t,r,fn; -65 1.13 (bde 29-Oct-05): double tx[3]; -66 1.14 (bde 29-Oct-05): int32_t e0,i,nx,n,ix,hx; -67 1.1 (jkh 19-Aug-94): -68 1.1 (jkh 19-Aug-94): GET_FLOAT_WORD(hx,x); -69 1.1 (jkh 19-Aug-94): ix = hx&0x7fffffff; -70 1.1 (jkh 19-Aug-94): if(ix<=0x3f490fd8) /* |x| ~<= pi/4 , no need for reduction */ -71 1.1 (jkh 19-Aug-94): {y[0] = x; y[1] = 0; return 0;} -72 1.14 (bde 29-Oct-05): /* 33+53 bit pi is good enough for special and medium size cases */ -73 1.2 (bde 07-Apr-95): if(ix<0x4016cbe4) { /* |x| < 3pi/4, special case with n=+-1 */ -74 1.14 (bde 29-Oct-05): if(hx>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 <sys/cdefs.h> +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 <float.h> +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" ]]> </programlisting> </figure>
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