Drafts on Bits & pieces - Sven Wehrendhttps://wehrend.github.io/de/drafts/Recent content in Drafts on Bits & pieces - Sven WehrendHugode<link>https://wehrend.github.io/de/drafts/alu2/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://wehrend.github.io/de/drafts/alu2/</guid><description><div class="olist loweralpha"> <ol class="loweralpha" type="a"> <li> <p>title: How does a CPU work? The swiss knife (Part II)</p> </li> <li> <p>slug: how-does-a-cpu-work-alu-2</p> </li> <li> <p>date: 2022-02-09</p> </li> <li> <p>category:</p> </li> <li> <p>link:</p> </li> <li> <p>description:</p> </li> <li> <p>type: text</p> </li> </ol> </div> <div class="sect1"> <h2 id="_alu_arithmetic_logic_unit">ALU (Arithmetic Logic Unit)</h2> <div class="sectionbody"> <div class="sect2"> <h3 id="_instruction_table">Instruction table</h3> <table class="tableblock frame-all grid-all stretch"> <colgroup> <col style="width: 25%;"/> <col style="width: 25%;"/> <col style="width: 25%;"/> <col style="width: 25%;"/> </colgroup> <thead> <tr> <th class="tableblock halign-left valign-top">logic operations</th> <th class="tableblock halign-left valign-top">description</th> <th class="tableblock halign-left valign-top">implementation</th> <th class="tableblock halign-left valign-top">data type / size</th> </tr> </thead> <tbody> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock">and</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">basic boolean Op</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">-</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">bit</p></td> </tr> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock">or</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">basic boolean Op</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">-</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">bit</p></td> </tr> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock">not</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">basic boolean Op</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">-</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">bit</p></td> </tr> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock">xor</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">complex boolean Op</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">-</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">bit</p></td> </tr> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock">shl</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">shift left</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">-</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">various</p></td> </tr> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock">shr</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">shift right</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">-</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">various</p></td> </tr> </tbody> </table> <table class="tableblock frame-all grid-all stretch"> <colgroup> <col style="width: 33.3333%;"/> <col style="width: 33.3333%;"/> <col style="width: 33.3334%;"/> </colgroup> <thead> <tr> <th class="tableblock halign-left valign-top">control instructions</th> <th class="tableblock halign-left valign-top">description</th> <th class="tableblock halign-left valign-top">data type / size</th> </tr> </thead> <tbody> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock">ld</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">load</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">various</p></td> </tr> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock">st</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">store</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">various</p></td> </tr> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock">jx</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">jump (x= gt,eq, lt )</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">various</p></td> </tr> </tbody> </table> <table class="tableblock frame-all grid-all stretch"> <colgroup> <col style="width: 25%;"/> <col style="width: 25%;"/> <col style="width: 25%;"/> <col style="width: 25%;"/> </colgroup> <thead> <tr> <th class="tableblock halign-left valign-top">arithmetic operations</th> <th class="tableblock halign-left valign-top">description</th> <th class="tableblock halign-left valign-top">implementation</th> <th class="tableblock halign-left valign-top">data type / size</th> </tr> </thead> <tbody> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock">ashl</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">arithmetic shift left</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">-</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">various</p></td> </tr> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock">ashr</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">arithmetic shift right</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">-</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">various</p></td> </tr> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock">inc</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">increment</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">-</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">various</p></td> </tr> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock">dec</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">decrement</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">-</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">various</p></td> </tr> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock">add</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">addition</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">-</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">(u) integer</p></td> </tr> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock">sub</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">subtraction</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">-</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">(u) integer</p></td> </tr> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock">mul</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">multiplication</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">software-routine or HW</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">(u)integer</p></td> </tr> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock">div</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">division</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">software-routine or HW</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">(u)integer</p></td> </tr> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock">sin</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">sine</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">software-routine (Cordic)</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">(u) integer</p></td> </tr> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock">cos</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">cosine</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">software-routine (Cordic)</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">(u) integer</p></td> </tr> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock">tan</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">tangens</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">software-routine (Cordic)</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">(u) integer</p></td> </tr> </tbody> </table> </div></description></item></channel></rss>