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- <title>SDCC - Freeware, Optimizing C_Compiler (8051)</title>
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-<body>
-
-<center>
-<hr WIDTH="10%">
-<br><b><font color="#666666"><font size=+3>SDCC</font></font></b>
-<hr WIDTH="100%">
-<p><b><font color="#009900"><font size=+2>Official Home of SDCC</font></font></b></center>
-
-<p><b><font size=+1>What is SDCC ?</font></b>
-<dl><blckquote>
-<dl>
-<dt>
-<font size=+1><b>SDCC</b> is a<u> </u><b><i><font color="#660000">Free
-ware , retargettable, optimizing ANSI - C compiler. The</font></i></b>
-current version targets <b><i><font color="#660000">Intel 8051 </font></i></b>based
-MCUs, it can be retargeted for other 8 bit MCUs or PICs. The entire
-source code for the compiler is distributed under GPL. SDCC uses ASXXXX
-& ASLINK a Free ware, retargettable assembler & linker. SDCC has
-<b><i><font color="#660000">extensive
-MCU (8051) specific language extensions, which</font></i></b> lets it utilize
-the underlying hardware effectively. The front end (parser) will be enhanced
-to handle language extensions for other MCUs as and when they are targeted.
-In addition to the MCU Specific optimizations SDCC also does a host of
-standard optimizations like <b><i><font color="#660000">global sub expression
-elimination, loop optimizations (loop invariant , strength reduction of
-induction variables and loop reversing ), constant folding & propagation,
-copy propagation, dead code elimination and jump tables for 'switch' statements.
-For</font></i></b> the Back end SDCC uses a <b><i><font color="#660000">global
-register allocation </font></i></b>scheme which should be well suited for
-other 8 bit MCUs , the peep hole optimizer uses a rule based substitution
-mechanism which is MCU independent. Supported data types are <b><i><font color="#660000">short
-(8</font></i></b> bits, 1 byte), <b><i><font color="#660000">char (8</font></i></b>
-bits, 1 byte) , int (16 bits, 2 bytes ), <b><i><font color="#660000">long
-(32</font></i></b> bit, 4 bytes) & <b><i><font color="#660000">float
-(4</font></i></b> byte IEEE). SDCC also comes with a <b><i>source
-level debugger</i> SDCDB</b>, the current version of the debugger uses
-Daniel's s51 simulator. The compiler also allows <b><i><font color="#660000">inline
-assembler code</font></i></b> to be embedded anywhere in a function. In
-addition routines developed in assembly can also be called. SDCC also provides
-an option to report the relative complexity of a function, these functions
-can then be further optimized , or hand coded in assembly if need be.</font></dt>
-</dl>
-
-<dt>
-
-<hr WIDTH="100%"></dt>
-
-<br><b><font size=+1>Download [Sun Jan 16 12:08:15 CST 2000]</font></b>
-<br>
-<dl><font size=+1>To compile SDCC, <b><i><font color="#993300">Linux (
-and other Unix )</font> </i></b>users will need to install <i>gcc</i> or
-any other <i>C</i> compiler. Windows 95/NT users will need to download
-the <i>full</i> development version of CYGWIN32 from <b><a href="http://sourceware.cygnus.com/cygwin/">http://sourceware.cygnus.com/cygwin/
-</a></b>.
-Note that <b>cygnus</b> distributes CYGWIN32 in two packages you will need
-the <i>full development</i> package, this contains the compiler and other
-utilities that you will need to compile SDCC, I have not tried compiling
-the system with any other compiler under MS/Windows.</font>
-<p><font size=+1>Version 2.1.8 onwards will be distributed in *.tar.gz
-format, the installation procedure will also change. Installation section
-of the documentation has been updated to include the new procedure.
-Click here to download </font><b><font size=+2><a href="ftp://sdcc.sourceforge.net/pub/sdcc/sdcc-2.1.9Ga.tar.gz">sdcc-2.1.9Ga.tar.gz
-</a></font></b><font size=+1> in
-the new distribution format. This distribution also contains Daniel's simulator
-.</font>
-<p><font size=+1><a href="http://www.kd0yu.com">Vote for the next target
-of SDCC</a></font>
-<p><font size=+1>Having trouble downloading ? Here are some alternate site.</font>
-<dl>
-<dl>
-<ul>
-<li>
-<b><font size=+1><a href="http://web.kd0yu.com/sdcc/">http://web.kd0yu.com/sdcc/
-</a></font></b><font size=-1>provided
-by dave@kd0yu.com</font></li>
-
-<li>
-<b><font size=+1><a href="http://www.ozemail.com.au/~bkk/sdcc">http://www.ozemail.com.au/~bkk/sdcc
-</a></font></b><font size=-1>provided
-by ben knight bkk@ozemail.com.au></font></li>
-
-<li>
-<font size=+1>Two sites </font><font size=-1>provided by irk Verwiebe dirk@verwiebe.de></font></li>
-
-<br><font size=+1>Binaries on: <b><a href="http://members.aol.com/sdccwin/pub">http://members.aol.com/sdccwin/pub</a></b></font>
-<br><font size=+1>Sources on: <b><a href="http://members.aol.com/sdccsrc/pub">http://members.aol.com/sdccsrc/pub</a></b></font></ul>
-</dl>
-</dl>
-Looking for Sample code ? Have some code developed for SDCC you want to
-share ?
-<b><font size=+1><a href="http://42.fht-esslingen.de/SDCC_OKR/">Click
-here for the SDCC "Open Knowledge" website</a></font></b>
-<br>
-<p><b><font size=+2><a href="ftp://sdcc.sourceforge.net/pub/sdcc/sdcc-2.1.9Gawinbin.tar.gz">Binary distribution
-of Version 2.1.9Ga </a></font></b><font size=+1>for Windows is available
-. The distribution is compiled to run from the directory /usr/local. Gunzip
-& untar the binary distribution at the root (/) directory of the partition/drive
-you want to install the software on. The source distribution of this version
-compiles with CYGWIN. <b><a href="cygwininst.txt">Click here to view more
-detailed installation</a></b> instructions for Win95/NT (provided by Michael
-Jamet mjamet@computer.org).</font>
-<p><font size=+1>A binary distribution of the package for DOS can be <b><a href="http://www.geocities.com/SiliconValley/Vista/6552/sdcc.html">downloaded
-from SET's page.</a></b></font>
-<p><font size=+2>Michael Hope <michaelh@earthling.net> is working on
-a Z80 target ,a snapshot of which can be downloaded by <b><a href="http://earthling.net.nz/~michaelh/snapshots/">clicking
-here.</a></b></font>
-<p>The debugger works the DDD (Data Display debugger), Terry Porter <tp@gronk.apana.org.au>
-has a screenshot and a brief HOWTO at <a href=http://www.odyssey.apana.org.au/~tjporter/ddd_sdcc.gif> http://www.odyssey.apana.org.au/~tjporter/ddd_sdcc.gif </a>
-<p>An alternate simulator & source level debugger can be downloaded
-from Jens Altmann's JSIM page <b><a href="http://home.t-online.de/home/Jens.Altmann/jsim-e.htm">http://home.t-online.de/home/Jens.Altmann/jsim-e.htm</a></b>
-<br>
-<p><font size=+1>Older versions can be <b><a href="http://nipkow.cs.abo.fi">downloaded
-from Marcus Alanen's Page.</a></b></font>
-<p><!-- Begin ListBot Code --><form method="post" action="http://www.listbot.com/cgi-bin/subscriber">
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-by ListBot</a></font></font></td>
-</tr>
-</table>
-</form><!-- End ListBot Code -->
-<p><font size=+1>You can </font><b><font size=+2><a href="http://sdcc.listbot.com">view
-the archive</a> </font></b><font size=+1>of messages posted to the mailing
-list (poor man's FAQ).</font>
-<p><font size=+1><b><a href="http://www.insidetheweb.com/mbs.cgi/mb576992">Click
-here for SDCC Message Board </a></b>, maintained by <a href="mailto:ratzefumm@gmx.net">Alex
-Ratzefumm <ratzefumm@gmx.net> .</a></font>
-<p>
-<hr WIDTH="100%"></dl>
-<b><font size=+1>Documentation</font></b>
-<br>
-<dl>
-<dt>
-<b><i><font size=+2>SDCC User Guide :</font></i></b></dt>
-
-<ul>
-<li>
-<b><i><font size=+2> <a href="SDCCUdoc.html">HTML Format (included
-with Source bundle)</a></font></i></b></li>
-
-<li>
-<b><i><font size=+2><a href="SDCCUdoc.ps">PostScript Format (Not included
-with Source Bundle)</a></font></i></b></li>
-
-<li>
-<b><i><font size=+2><a href="SDCCUdoc.txt">Plain Text Format. (Not included
-with source bundle)</a></font></i></b></li>
-</ul>
-</dl>
-</dl>
-
-<dl>
-<dl>
-<dt>
-
-<hr WIDTH="100%"></dt>
-
-<dt>
-</dt>
-</dl>
-<b><font size=+1>Known Problems</font></b>
-<dl>
-<dl>
-<li>
-<font color="#CC0000"><font size=+1>MS/Windows Users note that due to some
-bugs in the CYGWIN runtime library the compiler generated temporary files
-are NOT cleared from the </font><b><font size=+2>/tmp </font></b><font size=+1>directory,
-these have to be manually deleted.</font></font></li>
-
-<li>
-<font color="#CC0000"><font size=+1>--xstack options not yet fully implemented.</font></font></li>
-
-<li>
-<font color="#CC0000"><font size=+1>first storage class specified overrides
-in declarations . e.g.,</font></font></li>
-
-<dl><font color="#CC0000"><font size=+1>short xdata x, idata y.</font></font></dl>
-<font color="#CC0000"><font size=+1>will declare both x & y in xdata
-space. The work around for this is to declare variables with different
-storage classes separately e.g..</font></font>
-<dl><font color="#CC0000"><font size=+1>xdata short x;</font></font>
-<br><font color="#CC0000"><font size=+1>idata short y;</font></font></dl>
-</dl>
-</dl>
-
-<dl>
-<dt>
-
-<hr WIDTH="100%"></dt>
-
-<dt>
-</dt>
-</dl>
-
-<dt>
-<b><font size=+1>Enhancements & Bugs Fixes.</font></b></dt>
-
-<dl>
-<dl><font color="#330000"><font size=+1>Click</font><b><font size=+2><a href="SDCCBugsFixed.html">
-here </a></font></b><font size=+1>to see the enhancements and bug fixes
-done till date.</font></font></dl>
-
-<hr WIDTH="100%"></dl>
-<b><font size=+1>What IDE to use ?</font></b>
-<br>
-<dl><font size=+1>I recommend using <b><i><a href="http://www.xemacs.org">XEmacs</a></i></b>,
-it is free and is also a really GREAT editor. Linux / Unix users can download
-binaries for their specific platforms from <b><i><a href="ftp://ftp.xemacs.org">ftp://ftp.xemacs.org</a></i></b>
-. Windows 95/98/NT Users , can download binaries from <b><i><a href="ftp://ftp.xemacs.org/pub/xemacs/binary-kits/win32/">ftp://ftp.xemacs.org/pub/xemacs/binary-kits/win32/</a></i></b></font>
-<p><font size=+1>The interface files required for the debugger to interact
-with XEmacs is distributed with the source code.</font></dl>
-
-<dl>
-<dl> </dl>
-
-<hr WIDTH="100%"></dl>
-<b><font size=+1>Reporting Bugs.</font></b></dl>
-
-<dl>
-<dl>
-<dt>
-<font size=+1>Click on this </font><b><font size=+2><a href="mailto:sandeep.dutta@usa.net">sandeep.dutta@usa.net</a></font></b><font size=+1>to
-send me an email, also send an </font><b><font size=+2><a href="mailto:sdcc@listbot.com">email
-to the mailing list</a></font></b><font size=+1> for the benefit of other
-users .Bugs will be fixed according to their severity. I will update the
-Known Problems section. The compiler alone without the assembler , linker,
-Preprocessor & garbage collector is about 40,000 lines of blank skipped
-code, as with any project of this size there are bound to be bugs, I will
-try me level best to fix them as quickly as I can . If you can trace the
-bug and fix it, please do so, do send me a copy of the fixed source
-code so I can update my copy.</font></dt>
-
-<dt>
-
-<hr WIDTH="100%"></dt>
-
-<dt>
-</dt>
-</dl>
-
-<dt>
-<b><font size=+1>Things we are working on .</font></b></dt>
-
-<dl>
-<li>
-<font size=+1>More optimizations.</font></li>
-
-<li>
-<font size=+1>Retargeting to for ATMEL AVR (8 bit RISC MCUs).</font></li>
-</dl>
-</dl>
-
-<dl>
-<dl>
-<dt>
-
-<hr WIDTH="100%"></dt>
-
-<dt>
-</dt>
-</dl>
-
-<dt>
-<b><font size=+1>Notes for Users of Version 1.xx</font></b></dt>
-
-<dl>
-<dt>
-<font size=+1>For the benefit of users of the previous Version, I
-have kept the parser almost identical, I have added a few features, but
-the programs developed using the first version should compile without change
-with the new version. The command line options however have changed, the
-compiler will generate a warning when it encounters an older option and
-prompt you with the new option.</font></dt>
-
-<dt>
-<font size=+1>Version 2.xx is a almost a complete rewrite, it is much more
-stable and ANSI Compliant than the previous version.</font></dt>
-
-<dt>
-
-<hr WIDTH="100%"></dt>
-
-<dt>
-</dt>
-</dl>
-
-<dt>
-<b><font size=+1>Links</font></b></dt>
-
-<dl>
-<dt>
-<font size=+1>Here are some links I found useful.</font></dt>
-
-<ul>
-<li>
-<font size=+1>Daniel Drotos has a <a href="http://mazsola.iit.uni-miskolc.hu/~drdani/embedded/s51/">Freeware
-simulator for MCS51.</a> This simulator is distributed with the compiler
-. I found this simulator very very useful (MUST HAVE).</font></li>
-
-<li>
-<font size=+1>J<a href="http://www.caseconsole.com/mcb152">oachim Elen
-has a 8051 Micro controller board </a>with Packet Radio interface .</font></li>
-
-<li>
-<font size=+1><a href="http://www.goofee.com/goofee.htm">Goofee </a>is
-a very interesting visual programming environment. The software used to
-be free now you have to buy his book, but worth taking a look.</font></li>
-
-<li>
-<font size=+1><a href="http://www.8052.com">www.8052.com</a> is a great
-site for 8051 programmers.</font></li>
-
-<li>
-<font size=+1><a href="http://welcome.to/obukhov">Dimitry Obukhov</a> has
-some useful routines in C, for I</font><sup>2</sup><font size=+1>C
-and other stuff. His malloc & serial I/O routines are included with
-the compiler.</font></li>
-
-<li>
-<font size=+1><a href="http://ourworld.compuserve.com/homepages/jhartman">John
-Hartman </a>sells NoICE, an emulator. He also created ASXXXX & ASLINK
-for 8051. SDCC will eventually support NoICE.</font></li>
-
-<li>
-<font size=+1><a href="http://www.pagesz.net/~thyphoon">Tayfun</a> sells
-a Single Board Computer based on Phillips 80C552.</font></li>
-</ul>
-</dl>
-</dl>
-
-<dl>
-<dl>
-<hr WIDTH="100%"></dl>
-
-<dt>
-<b><font size=+1>Acknowledgments.</font></b></dt>
-
-<ul>
-<ul>
-<li>
-<font size=+1><a href="mailto:baldwin@shop-pdp.kent.edu">Alan Baldwin (baldwin@shop-pdp.kent.edu)
-</a>-
-Initial version of ASXXXX and ASLINK.</font></li>
-
-<li>
-<font size=+1>J<a href="jhartman@compuserve.com">ohn Hartman (jhartman@compuserve.com)
-</a>-
-Porting ASXXX and ASLINK for 8051.</font></li>
-
-<li>
-<font size=+1><a href="mailto:dso@usa.net">Dmitry S. Obukhov (dso@usa.net)</a>
-- malloc and serial I/O routines.</font></li>
-
-<li>
-<font size=+1><a href="boehm@sgi.com">Jans J Boehm(boehm@sgi.com)</a> and
-Alan J Demers - Conservative garbage collector for C & C++.</font></li>
-
-<li>
-<font size=+1><a href="mailto:jlvern@writeme.com">Jean Loius-VERN (jlvern@writeme.com></a>
-- substantial improvement in the back-end code generation.</font></li>
-
-<li>
-<font size=+1><a href="mailto:drdani@mazsola.iit.uni-miskolc.hu">Daniel
-Drotos <drdani@mazsola.iit.uni-miskolc.hu> </a>- Free ware simulator
-for 8051.</font></li>
-
-<li>
-<font size=+1><a href="mailto:malini_dutta@hotmail.com">Malini Dutta(malini@mediaone.net)</a>
-- my wife for her patience and support.</font></li>
-
-<li>
-<font size=+1>Unknown - for the GNU C - preprocessor.</font></li>
-</ul>
-</ul>
-</dl>
-
-<center>This page has been accessed <img SRC="/cgi-bin/counter" > times since
-March 6th 1999</center>
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