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| author | NetBSD project <NetBSD project> | 2015-07-30 09:50:51 +0000 |
|---|---|---|
| committer | lersek <lersek@Edk2> | 2015-07-30 09:50:51 +0000 |
| commit | 3352b62bebfd1e5c2e9961f481df968ab317d78d (patch) | |
| tree | 12bfd6162cefbb63fa6e26c9fc9b7c9526838d9d /StdLib/LibC/Softfloat/README.txt | |
| parent | b393333538ee3a6b16a3a1d25ab2372942c3aac7 (diff) | |
| download | edk2-3352b62bebfd1e5c2e9961f481df968ab317d78d.tar.gz edk2-3352b62bebfd1e5c2e9961f481df968ab317d78d.tar.bz2 edk2-3352b62bebfd1e5c2e9961f481df968ab317d78d.zip | |
StdLib/LibC: Add software floating point library from NetBSD
Floating point processing is not supported on ARM for UEFI. In order to
support UEFI applications in AppPkg we use this library to provide the
required functionality.
Changes as compared to the NetBSD version:
- Formatting changes (tabs to spaces, DOS line endings etc).
- Disable exceptions as described in the float_raise() function.
- Disable definition of 'Symbolic Boolean literals' in milieu.h.
Source originally from: NetBSD project
- Source: http://cvsweb.netbsd.org/bsdweb.cgi/?only_with_tag=MAIN
- Licensing and Copyright: http://www.netbsd.org/about/redistribution.html
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Harry Liebel <Harry.Liebel@arm.com>
Reviewed-by: Olivier Martin <Olivier.Martin@arm.com>
Reviewed-by: Daryl McDaniel <edk2-lists@mc2research.org>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18116 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'StdLib/LibC/Softfloat/README.txt')
| -rw-r--r-- | StdLib/LibC/Softfloat/README.txt | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/StdLib/LibC/Softfloat/README.txt b/StdLib/LibC/Softfloat/README.txt new file mode 100644 index 0000000000..de6052e468 --- /dev/null +++ b/StdLib/LibC/Softfloat/README.txt @@ -0,0 +1,39 @@ +$NetBSD: README.txt,v 1.1 2000/06/06 08:15:02 bjh21 Exp $
+
+Package Overview for SoftFloat Release 2a
+
+John R. Hauser
+1998 December 13
+
+
+SoftFloat is a software implementation of floating-point that conforms to
+the IEC/IEEE Standard for Binary Floating-Point Arithmetic. SoftFloat is
+distributed in the form of C source code. Compiling the SoftFloat sources
+generates two things:
+
+-- A SoftFloat object file (typically `softfloat.o') containing the complete
+ set of IEC/IEEE floating-point routines.
+
+-- A `timesoftfloat' program for evaluating the speed of the SoftFloat
+ routines. (The SoftFloat module is linked into this program.)
+
+The SoftFloat package is documented in four text files:
+
+ softfloat.txt Documentation for using the SoftFloat functions.
+ softfloat-source.txt Documentation for compiling SoftFloat.
+ softfloat-history.txt History of major changes to SoftFloat.
+ timesoftfloat.txt Documentation for using `timesoftfloat'.
+
+Other files in the package comprise the source code for SoftFloat.
+
+Please be aware that some work is involved in porting this software to other
+targets. It is not just a matter of getting `make' to complete without
+error messages. I would have written the code that way if I could, but
+there are fundamental differences between systems that I can't make go away.
+You should not attempt to compile SoftFloat without first reading both
+`softfloat.txt' and `softfloat-source.txt'.
+
+At the time of this writing, the most up-to-date information about
+SoftFloat and the latest release can be found at the Web page `http://
+HTTP.CS.Berkeley.EDU/~jhauser/arithmetic/SoftFloat.html'.
+
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