add libm.txt

diff --git a/index.html b/index.html
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+++ b/index.html
@@ -7,6 +7,7 @@
 <li><a href="http://www.etalabs.net/musl/">musl</a> libc
 <ul>
 <li><a href="http://repo.or.cz/w/musl-tools.git">musl-tools</a>
+<li><a href="libm.txt">libm.txt</a>
 </ul>
 <li><a href="http://repo.or.cz/w/c-standard.git">c-standard</a> in html
 <li><a href="http://repo.hu/projects/yget">yget</a> youtube downloader

diff --git a/libm.txt b/libm.txt
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@@ -0,0 +1,75 @@
+other
+-----
+
+http://754r.ucbtest.org/
+http://www.vinc17.org/research/extended.en.html
+http://stereopsis.com/sree/fpu2006.html
+http://www.cs.berkeley.edu/~wkahan/
+http://download.oracle.com/docs/cd/E19957-01/806-3568/ncg_goldberg.html
+
+
+libm
+----
+
+unix v7 libm by Robert Morris (rhm) around 1979
+see: "Computer Approximations" by Hart & Cheney, 1968
+used in: plan9, go
+
+cephes by Stephen L. Moshier, 1984-1992
+http://www.netlib.org/cephes/
+see: "Methods and Programs for Mathematical Functions" by Moshier 1989
+
+fdlibm by K. C. Ng around 1993, updated in 1995?
+(1993: copyright notice: "Developed at SunPro ..")
+(1995: copyright notice: "Developed at SunSoft ..")
+see: "Artument Reduction for Huge Arguments: Good to the Last Bit" by Ng 1992
+http://www.netlib.org/fdlibm
+used in: 1993: netbsd, openbsd, 1995: freebsd, bionic, musl
+
+libultim by Abraham Ziv around 2001 (gpl)
+(also known as the ibm accurate portable math lib)
+see: "Fast evaluation of elementary mathematical functions with correctly rounded last bit" by Ziv 1991
+http://web.archive.org/web/20050207110205/http://oss.software.ibm.com/mathlib/
+used in: glibc
+
+libmcr by K. C. Ng, 2004
+(sun's correctly rounded libm)
+
+mathcw by Nelson H. F. Beebe, 2010?
+http://ftp.math.utah.edu/pub/mathcw/
+(no sources available?)
+
+sleef by Naoki Shibata, 2010
+(simd lib for evaluating elementary functions)
+http://shibatch.sourceforge.net/
+
+crlibm by ens-lyon, 2004-2010
+http://lipforge.ens-lyon.fr/www/crlibm/
+see: crlibm.pdf at http://lipforge.ens-lyon.fr/frs/?group_id=8&release_id=123
+see: "Elementary Functions" by Jean-Michel Muller 2005
+see: "Handbook of Floating-Point Arithmetic" by (many authors from Lyon) 2009
+
+(closed: intel libm, hp libm for itanium, ..)
+
+
+libm tests
+----------
+http://www.netlib.org/fp/ucbtest.tgz
+http://www.jhauser.us/arithmetic/TestFloat.html
+http://cant.ua.ac.be/old/ieeecc754.html
+http://www.loria.fr/~zimmerma/mpcheck/
+http://gforge.inria.fr/projects/mpcheck/
+http://people.inf.ethz.ch/gonnet/FPAccuracy/Analysis.html
+http://www.vinc17.org/research/testlibm/index.en.html
+http://www.vinc17.org/research/fptest.en.html
+tests in crlibm
+
+multiprecision libs (useful for tests)
+http://code.google.com/p/fastfunlib/
+http://mpfr.org/
+http://pari.math.u-bordeaux.fr/
+scs_lib in crlibm
+
+
+
+by nsz 2012-01-22