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- <html>
- <head>
- <title>Divider</title>
- </head>
- <body bgcolor="FFFFFF">
- <h1><img align="center" src="../../../../en/icons/divider.gif" width="32" height="32">
- <em>Divider</em></h1>
- <p><table>
- <tr><td><strong>Library:</strong></td>
- <td><a href="index.html">Arithmetic</a></td></tr>
- <tr><td><strong>Introduced:</strong></td>
- <td>2.0 Beta 22</td></tr>
- <tr><td valign="top"><strong>Appearance:</strong></td>
- <td valign="top"><img src="../../../../en/img-libs/divider.png" width="44" height="45"></td></tr>
- </table></p>
- <h2>Behavior</h2>
- <p>This component divides two values coming in via the west inputs and
- outputs the quotient on the east output. The component is designed so
- that it can be cascaded with other dividers to provide support a
- dividend with more bits than
- is possible with a single divider: The upper input provides the
- upper <var>dataBits</var> bits of the dividend (if it is specified at
- all), and the <var>rem</var> bits provide the remainder, which can be
- fed as the <var>upper</var> input into another divider.</p>
- <p>If the divisor is 0, then no division is performed (i.e., the divisor
- is assumed to be 1).</p>
- <p>The divider essentially performs unsigned division. That is, the
- remainder will always be between 0 and <var>divisor</var>-1. The
- quotient will always be an integer so that
- <center>
- <var>quotient</var> * <var>divisor</var> + <var>remainder</var>
- = <var>dividend</var> .
- </center>
- If, however, the <var>quotient</var> does not fit into
- <var>dataBits</var> bits, then only the lower <var>dataBits</var> bits
- will be reported. The component does not provide any method for
- accessing the upper <var>dataBits</var> bits.</p>
- <p>If either of the operands contains some floating bits or some error
- bits, then the component's outputs will be either entirely floating or
- entirely error values.</p>
- <h2>Pins</h2>
- <dl>
- <dt>West edge, north end (input, bit width matches Data Bits attribute)
- <dd>The lower <var>dataBits</var> bits of the dividend (that is, the
- first operand for the division).
- <dt>West edge, south end (input, bit width matches Data Bits attribute)
- <dd>The divisor (that is, the second operand for the division)
- <dt>North edge, labeled <var>upper</var> (input, bit width matches Data Bits attribute)
- <dd>The upper <var>dataBits</var> bits of the dividend (that is, the
- first operand for the division).
- <dt>East edge (output, bit width matches Data Bits attribute)
- <dd>The lower <var>dataBits</var> bits of the quotient, as specified
- above.
- <dt>South edge, labeled <var>rem</var> (output, bit width matches Data Bits attribute)
- <dd>The remainder of the division. This value will always be between 0
- and <var>divisor</var>-1.
- </dl>
- <h2>Attributes</h2>
- <p>When the component is selected or being added,
- Alt-0 through Alt-9 alter its <q>Data Bits</q> attribute.</p>
- <dl>
- <dt>Data Bits</dt>
- <dd>The bit width of the values to be divided and of the result.</dd>
- </dl>
- <h2>Poke Tool Behavior</h2>
- <p>None.</p>
- <h2>Text Tool Behavior</h2>
- <p>None.</p>
- <p><a href="../index.html">Back to <em>Library Reference</em></a></p>
- </body>
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