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<HTML><!-- -- Copyright (c) 1998,1999 -- University of Notre Dame -- -- Permission to use, copy, modify, distribute and sell this software -- and its documentation for any purpose is hereby granted without fee, -- provided that the above copyright notice appears in all copies and -- that both that copyright notice and this permission notice appear -- in supporting documentation. The University of Notre Dame makes no -- representations about the suitability of this software for any -- purpose. It is provided "as is" without express or implied warranty. -- --><HEAD><TITLE>Description of Offset</TITLE></HEAD><BODY BGCOLOR="#ffffff" LINK="#0000ee" TEXT="#000000" VLINK="#551a8b" ALINK="#ff0000"> <FONT FACE=Helvetica><!--end header--><TABLE BORDER=0 CELLSPACING=0 CELLPADDING=2 WIDTH=100%><TR><TD><TABLE BORDER=0 CELLSPACING=0 CELLPADDING=0 WIDTH=100%><TR><TD Align=left valign=middle width=440 rowspan=2><FONT FACE=verdana,arial,helvetica SIZE=+3 COLOR=#110088><B>Offset</B></FONT></TD><TD valign=middle Align=right width=128 rowspan=2><A HREF="http://lsc.nd.edu/research/mtl"><IMG BORDER=0 SRC="./glossy-mtl-logo.jpg" height=48 ALT="[MTL Home]"></A></TD><TD Align=center width=280 nowrap><Font face=verdana,arial,helvetica size=+3><b>Programmers Guide</b></font></TD></TR><TR BGCOLOR='#2020b0'><TD HEIGHT=20 VALIGN='MIDDLE' NOWRAP align=center STYLE="font-family:verdana,arial,helvetica;font-weight:bold;"> <A STYLE="text-decoration:none;color:white;font-family:verdana,arial,helvetica;font-weight:bold;" HREF="./table_of_contents.html">Contents</A> | <A STYLE="text-decoration:none;color:white;font-family:verdana,arial,helvetica;font-weight:bold;" HREF="./mtl_index.html">Index</A> | <A STYLE="text-decoration:none;color:white;font-family:verdana,arial,helvetica;font-weight:bold;" HREF="http://lsc.nd.edu/research/mtl/search.html">Search</A> </TD></TR></TABLE></TD></TR><TR><TD><Table Border=0 CellPadding=0 CellSpacing=0 width=100% cols=2><TR><TD Align=left><BR><TABLE BORDER=0 CellSpacing=0 CellPadding=0><TR><TD><Img src = "utilities.gif" Alt="" WIDTH = "194" HEIGHT = "38" ></TD></TR></TABLE></TD><TD Align=right><BR><TABLE BORDER=0 CellSpacing=0 CellPadding=0><TR><TD><Img src = "concept.gif" Alt="" WIDTH = "194" HEIGHT = "38" ></TD></TR></TABLE></TD></TR><TR><TD Align=left VAlign=top><b>Category</b>:utilities</TD><TD Align=right VAlign=top><b>Component type</b>:concept</TD></TR></Table></TD></TR><TR><TD><IMG SRC="whitespace.gif" Alt="" WIDTH="32" HEIGHT="10" ALIGN="TOP"></TD></TR><TR BGCOLOR=#e0e0e0><TD VALIGN=BOTTOM><FONT FACE=arial,helvetica SIZE=+1><B>Description</B></FONT></TD></TR><TR><TD> This utility is in charge of mapping TwoD coordinates to a location in the linear memory of a <A HREF="dense.html" >dense</A> <A HREF="matrix.html" >matrix</A>. </TD></TR><TR><TD><IMG SRC="whitespace.gif" Alt="" WIDTH="32" HEIGHT="10" ALIGN="TOP"></TD></TR><TR BGCOLOR=#e0e0e0><TD VALIGN=BOTTOM><FONT FACE=arial,helvetica SIZE=+1><B>Refinement of</B></FONT></TD></TR><TR><TD></TD></TR><TR><TD><IMG SRC="whitespace.gif" Alt="" WIDTH="32" HEIGHT="10" ALIGN="TOP"></TD></TR><TR BGCOLOR=#e0e0e0><TD VALIGN=BOTTOM><FONT FACE=arial,helvetica SIZE=+1><B>Associated types</B></FONT></TD></TR><TR><TD><TABLE BORDER><TR><TH>Concept</TH><TH>Type name</TH><TH>Description</TH></TR> <TR><TD VALIGN="TOP"> <TT>NonNegativeIntegralType </TT> </TD> <TD VALIGN="TOP"> <TT>X::size_type</TT> </TD> <TD><FONT FACE=Times SIZE=3> </FONT></TD> </TR> <TR><TD VALIGN="TOP"> <TT>size_type </TT> </TD> <TD VALIGN="TOP"> <TT>X::M</TT> </TD> <TD><FONT FACE=Times SIZE=3> Static major <A HREF="dimension.html" >dimension</A> </FONT></TD> </TR> <TR><TD VALIGN="TOP"> <TT>size_type </TT> </TD> <TD VALIGN="TOP"> <TT>X::N</TT> </TD> <TD><FONT FACE=Times SIZE=3> Static major <A HREF="dimension.html" >dimension</A> </FONT></TD> </TR> <TR><TD VALIGN="TOP"> <TT>Dimension </TT> </TD> <TD VALIGN="TOP"> <TT>X::dim_type</TT> </TD> <TD><FONT FACE=Times SIZE=3> type for dimensions </FONT></TD> </TR> <TR><TD VALIGN="TOP"> <TT>Dimension </TT> </TD> <TD VALIGN="TOP"> <TT>X::band_type</TT> </TD> <TD><FONT FACE=Times SIZE=3> Type for bandwidth </FONT></TD> </TR> <TR><TD VALIGN="TOP"> <TT>Tag </TT> </TD> <TD VALIGN="TOP"> <TT>X::strideability</TT> </TD> <TD><FONT FACE=Times SIZE=3> Can we use rows and columns helper functions? </FONT></TD> </TR> <TR><TD VALIGN="TOP"> <TT><A HREF="Offset.html" >Offset</A> </TT> </TD> <TD VALIGN="TOP"> <TT>X::transpose_type</TT> </TD> <TD><FONT FACE=Times SIZE=3> </FONT></TD> </TR> </TABLE></TD></TR><TR><TD><IMG SRC="whitespace.gif" Alt="" WIDTH="32" HEIGHT="10" ALIGN="TOP"></TD></TR><TR BGCOLOR=#e0e0e0><TD VALIGN=BOTTOM><FONT FACE=arial,helvetica SIZE=+1><B>Notations</B></FONT></TD></TR><TR><TD></TD></TR><TR><TD><IMG SRC="whitespace.gif" Alt="" WIDTH="32" HEIGHT="10" ALIGN="TOP"></TD></TR><TR BGCOLOR=#e0e0e0><TD VALIGN=BOTTOM><FONT FACE=arial,helvetica SIZE=+1><B>Definitions</B></FONT></TD></TR><TR><TD><UL></UL></TD></TR><TR><TD><IMG SRC="whitespace.gif" Alt="" WIDTH="32" HEIGHT="10" ALIGN="TOP"></TD></TR><TR BGCOLOR=#e0e0e0><TD VALIGN=BOTTOM><FONT FACE=arial,helvetica SIZE=+1><B>Expression semantics</B></FONT></TD></TR><TR><TD><TABLE BORDER><TR><TH>Description</TH><TH>Expression</TH><TH>Semantics</TH></TR> <TR> <TD><FONT FACE=Times SIZE=3> </FONT></TD> <TD VALIGN="TOP"> <TT> X()</TT> </TD> <TD VALIGN="TOP"> <TT> </TT> </TD> </TR> <TR> <TD><FONT FACE=Times SIZE=3> </FONT></TD> <TD VALIGN="TOP"> <TT> X(o)</TT> </TD> <TD VALIGN="TOP"> <TT> </TT> </TD> </TR> <TR> <TD><FONT FACE=Times SIZE=3> </FONT></TD> <TD VALIGN="TOP"> <TT> X(m, n, ld)</TT> </TD> <TD VALIGN="TOP"> <TT> </TT> </TD> </TR> <TR> <TD><FONT FACE=Times SIZE=3> </FONT></TD> <TD VALIGN="TOP"> <TT> X(m, n, ld, bw)</TT> </TD> <TD VALIGN="TOP"> <TT> </TT> </TD> </TR> <TR> <TD><FONT FACE=Times SIZE=3> </FONT></TD> <TD VALIGN="TOP"> <TT> X(t)</TT> </TD> <TD VALIGN="TOP"> <TT> </TT> </TD> </TR> <TR> <TD><FONT FACE=Times SIZE=3> Maps the (i,j) point from TwoD coords to a linear offset </FONT></TD> <TD VALIGN="TOP"> <TT> o.elt(i,j)</TT> </TD> <TD VALIGN="TOP"> <TT> </TT> </TD> </TR> <TR> <TD><FONT FACE=Times SIZE=3> The offset to the start of the ith OneD part of the TwoD </FONT></TD> <TD VALIGN="TOP"> <TT> o.oned_offset(i)</TT> </TD> <TD VALIGN="TOP"> <TT> </TT> </TD> </TR> <TR> <TD><FONT FACE=Times SIZE=3> The length of the ith OneD part </FONT></TD> <TD VALIGN="TOP"> <TT> o.oned_length(i)</TT> </TD> <TD VALIGN="TOP"> <TT> </TT> </TD> </TR> <TR> <TD><FONT FACE=Times SIZE=3> The size of the outer Container of the TwoD </FONT></TD> <TD VALIGN="TOP"> <TT> o.twod_length()</TT> </TD> <TD VALIGN="TOP"> <TT> </TT> </TD> </TR> <TR> <TD><FONT FACE=Times SIZE=3> The distance from one element to the next, usually 1 </FONT></TD> <TD VALIGN="TOP"> <TT> o.stride()</TT> </TD> <TD VALIGN="TOP"> <TT> </TT> </TD> </TR> <TR> <TD><FONT FACE=Times SIZE=3> The total size of the memory allocated to the TwoD </FONT></TD> <TD VALIGN="TOP"> <TT> X::size(m, n, sub, super)</TT> </TD> <TD VALIGN="TOP"> <TT> </TT> </TD> </TR> <TR> <TD><FONT FACE=Times SIZE=3> The major <A HREF="dimension.html" >dimension</A> size </FONT></TD> <TD VALIGN="TOP"> <TT> o.major()</TT> </TD> <TD VALIGN="TOP"> <TT> </TT> </TD> </TR> <TR> <TD><FONT FACE=Times SIZE=3> The minor <A HREF="dimension.html" >dimension</A> size </FONT></TD> <TD VALIGN="TOP"> <TT> o.minor()</TT> </TD> <TD VALIGN="TOP"> <TT> </TT> </TD> </TR> </TABLE></TD></TR><TR><TD><IMG SRC="whitespace.gif" Alt="" WIDTH="32" HEIGHT="10" ALIGN="TOP"></TD></TR><TR BGCOLOR=#e0e0e0><TD VALIGN=BOTTOM><FONT FACE=arial,helvetica SIZE=+1><B>Function specification</B></FONT></TD></TR><TR><TD><TABLE BORDER><TR><TH>Name</TH><TH>Function</TH><TH>Complexity</TH></TR> </TABLE></TD></TR><TR><TD><IMG SRC="whitespace.gif" Alt="" WIDTH="32" HEIGHT="10" ALIGN="TOP"></TD></TR><TR BGCOLOR=#e0e0e0><TD VALIGN=BOTTOM><FONT FACE=arial,helvetica SIZE=+1><B>Invariants</B></FONT></TD></TR><TR><TD></TD></TR><TR><TD><IMG SRC="whitespace.gif" Alt="" WIDTH="32" HEIGHT="10" ALIGN="TOP"></TD></TR><TR BGCOLOR=#e0e0e0><TD VALIGN=BOTTOM><FONT FACE=arial,helvetica SIZE=+1><B>Models</B></FONT></TD></TR><TR><TD><UL><LI> <A HREF="rect_offset.html" >rect_offset</A><LI> <A HREF="strided_offset.html" >strided_offset</A><LI> <A HREF="banded_offset.html" >banded_offset</A><LI> <A HREF="banded_view.html" >banded_view</A><LI> <A HREF="packed_offset.html" >packed_offset</A></UL></TD></TR><TR><TD><IMG SRC="whitespace.gif" Alt="" WIDTH="32" HEIGHT="15" ALIGN="TOP"></TD></TR><TR BGCOLOR=#e0e0e0><TD VALIGN=BOTTOM><FONT FACE=arial,helvetica SIZE=+1><B>Notes</B></FONT></TD></TR><TR><TD></TD></TR><TR><TD><IMG SRC="whitespace.gif" Alt="" WIDTH="32" HEIGHT="15" ALIGN="TOP"></TD></TR><TR BGCOLOR=#e0e0e0><TD VALIGN=BOTTOM><FONT FACE=arial,helvetica SIZE=+1><B>See also</B></FONT></TD></TR><TR><TD></TD></TR></TABLE><!--start footer--> <P><CENTER><CENTER><IMG SRC="./blue-bar.jpg" width=640></CENTER></CENTER><P><A HREF="http://www.nd.edu"><IMG BORDER=0 SRC="./ndtoclogo.gif" ALT="[MTL Home]" ALIGN=absmiddle></A></A><FONT SIZE="-2"><A HREF="../LICENSE.htm">Copyright ©1998,1999 University of Notre Dame. 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