149 lines
4.6 KiB
HTML
149 lines
4.6 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
|
|
|
|
<!--Converted with LaTeX2HTML 99.1 release (March 30, 1999)
|
|
original version by: Nikos Drakos, CBLU, University of Leeds
|
|
* revised and updated by: Marcus Hennecke, Ross Moore, Herb Swan
|
|
* with significant contributions from:
|
|
Jens Lippmann, Marek Rouchal, Martin Wilck and others -->
|
|
<HTML>
|
|
<HEAD>
|
|
<TITLE>3.15 Floating Point Support</TITLE>
|
|
<META NAME="description" CONTENT="3.15 Floating Point Support">
|
|
<META NAME="keywords" CONTENT="sdccman">
|
|
<META NAME="resource-type" CONTENT="document">
|
|
<META NAME="distribution" CONTENT="global">
|
|
|
|
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
|
|
<META NAME="Generator" CONTENT="LaTeX2HTML v99.1 release">
|
|
<META HTTP-EQUIV="Content-Style-Type" CONTENT="text/css">
|
|
|
|
<LINK REL="STYLESHEET" HREF="sdccman.css">
|
|
|
|
<LINK REL="next" HREF="node35.html">
|
|
<LINK REL="previous" HREF="node33.html">
|
|
<LINK REL="up" HREF="node19.html">
|
|
<LINK REL="next" HREF="node35.html">
|
|
</HEAD>
|
|
|
|
<BODY >
|
|
<!--Navigation Panel-->
|
|
<A NAME="tex2html752"
|
|
HREF="node35.html">
|
|
<IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="next_motif.gif"></A>
|
|
<A NAME="tex2html746"
|
|
HREF="node19.html">
|
|
<IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="up_motif.gif"></A>
|
|
<A NAME="tex2html740"
|
|
HREF="node33.html">
|
|
<IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="previous_motif.gif"></A>
|
|
<A NAME="tex2html748"
|
|
HREF="node1.html">
|
|
<IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="contents_motif.gif"></A>
|
|
<A NAME="tex2html750"
|
|
HREF="node61.html">
|
|
<IMG WIDTH="43" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="index" SRC="index_motif.gif"></A>
|
|
<BR>
|
|
<B> Next:</B> <A NAME="tex2html753"
|
|
HREF="node35.html">3.16 MCS51 Memory Models</A>
|
|
<B> Up:</B> <A NAME="tex2html747"
|
|
HREF="node19.html">3. Using SDCC</A>
|
|
<B> Previous:</B> <A NAME="tex2html741"
|
|
HREF="node33.html">3.14 int(16 bit) and</A>
|
|
  <B> <A NAME="tex2html749"
|
|
HREF="node1.html">Contents</A></B>
|
|
  <B> <A NAME="tex2html751"
|
|
HREF="node61.html">Index</A></B>
|
|
<BR>
|
|
<BR>
|
|
<!--End of Navigation Panel-->
|
|
|
|
<H2><A NAME="SECTION000415000000000000000">
|
|
3.15 Floating Point Support</A>
|
|
</H2>
|
|
|
|
<P>
|
|
SDCC supports IEEE (single precision 4bytes) floating point numbers.The
|
|
floating point support routines are derived from gcc's floatlib.c
|
|
and consists of the following routines:
|
|
<BR>
|
|
|
|
<BR>
|
|
<I><pending: tabularise this></I>
|
|
<BR>
|
|
|
|
<BR>
|
|
_fsadd.c - add floating point numbers
|
|
<BR>
|
|
_fssub.c - subtract floating point numbers
|
|
<BR>
|
|
_fsdiv.c - divide floating point numbers
|
|
<BR>
|
|
_fsmul.c - multiply floating point numbers
|
|
<BR>
|
|
_fs2uchar.c - convert floating point to unsigned char
|
|
<BR>
|
|
_fs2char.c - convert floating point to signed char
|
|
<BR>
|
|
_fs2uint.c - convert floating point to unsigned int
|
|
<BR>
|
|
_fs2int.c - convert floating point to signed int
|
|
<BR>
|
|
_fs2ulong.c - convert floating point to unsigned long
|
|
<BR>
|
|
_fs2long.c - convert floating point to signed long
|
|
<BR>
|
|
_uchar2fs.c - convert unsigned char to floating point
|
|
<BR>
|
|
_char2fs.c - convert char to floating point number
|
|
<BR>
|
|
_uint2fs.c - convert unsigned int to floating point
|
|
<BR>
|
|
_int2fs.c - convert int to floating point numbers
|
|
<BR>
|
|
_ulong2fs.c - convert unsigned long to floating point number
|
|
<BR>
|
|
_long2fs.c - convert long to floating point number
|
|
<BR>
|
|
|
|
<BR>
|
|
Note if all these routines are used simultaneously the data space
|
|
might overflow. For serious floating point usage it is strongly recommended
|
|
that the large model be used.
|
|
|
|
<P>
|
|
<HR>
|
|
<!--Navigation Panel-->
|
|
<A NAME="tex2html752"
|
|
HREF="node35.html">
|
|
<IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="next_motif.gif"></A>
|
|
<A NAME="tex2html746"
|
|
HREF="node19.html">
|
|
<IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="up_motif.gif"></A>
|
|
<A NAME="tex2html740"
|
|
HREF="node33.html">
|
|
<IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="previous_motif.gif"></A>
|
|
<A NAME="tex2html748"
|
|
HREF="node1.html">
|
|
<IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="contents_motif.gif"></A>
|
|
<A NAME="tex2html750"
|
|
HREF="node61.html">
|
|
<IMG WIDTH="43" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="index" SRC="index_motif.gif"></A>
|
|
<BR>
|
|
<B> Next:</B> <A NAME="tex2html753"
|
|
HREF="node35.html">3.16 MCS51 Memory Models</A>
|
|
<B> Up:</B> <A NAME="tex2html747"
|
|
HREF="node19.html">3. Using SDCC</A>
|
|
<B> Previous:</B> <A NAME="tex2html741"
|
|
HREF="node33.html">3.14 int(16 bit) and</A>
|
|
  <B> <A NAME="tex2html749"
|
|
HREF="node1.html">Contents</A></B>
|
|
  <B> <A NAME="tex2html751"
|
|
HREF="node61.html">Index</A></B>
|
|
<!--End of Navigation Panel-->
|
|
<ADDRESS>
|
|
<I>Johan Knol</I>
|
|
<BR><I>2001-07-13</I>
|
|
</ADDRESS>
|
|
</BODY>
|
|
</HTML>
|