<!DOCTYPE HTML> <html> <head> <meta http-equiv="Content-Type" content="text/html;charset=US-ASCII"> <meta name="generator" content="ZealOS V0.08"> <style type="text/css"> body {background-color:#000000;} .cF0{color:#ffffff;background-color:#000000;} .cF1{color:#3465a4;background-color:#000000;} .cF2{color:#4e9a06;background-color:#000000;} .cF3{color:#06989a;background-color:#000000;} .cF4{color:#a24444;background-color:#000000;} .cF5{color:#75507b;background-color:#000000;} .cF6{color:#ce982f;background-color:#000000;} .cF7{color:#bcc0b9;background-color:#000000;} .cF8{color:#555753;background-color:#000000;} .cF9{color:#729fcf;background-color:#000000;} .cFA{color:#82bc49;background-color:#000000;} .cFB{color:#34e2e2;background-color:#000000;} .cFC{color:#ac3535;background-color:#000000;} .cFD{color:#ad7fa8;background-color:#000000;} .cFE{color:#fce94f;background-color:#000000;} .cFF{color:#000000;background-color:#000000;} </style> </head> <body> <pre style="font-family:monospace;font-size:12pt"> <a name="l1"></a><span class=cF0> <a name="l2"></a></span><span class=cF5>These take a pointer to a bit field.</span><span class=cF0> <a name="l3"></a></span><span class=cF2>Bt</span><span class=cF0>: Bit Test <a name="l4"></a></span><span class=cF2>Bts</span><span class=cF0>: Bit Test and Set to one <a name="l5"></a></span><span class=cF2>Btr</span><span class=cF0>: Bit Test and Reset to zero <a name="l6"></a></span><span class=cF2>Btc</span><span class=cF0>: Bit Test and Compliment (toggle) <a name="l7"></a></span><span class=cF2>BEqual</span><span class=cF0>: Set bit to value. <a name="l8"></a> <a name="l9"></a>Bit operations are "atomic", no interrupt between the reading and writing the bit, important when multitasking. For multicore <a name="l10"></a>use "locked" forms. <a name="l11"></a> <a name="l12"></a></span><span class=cF5>These don't take a pointer, but the actual field.</span><span class=cF0> <a name="l13"></a></span><span class=cF2>Bsf</span><span class=cF0>: Bit Scan Forward (Pos of first low one bit or -1) <a name="l14"></a></span><span class=cF2>Bsr</span><span class=cF0>: Bit Scan Reverse (Pos of first high one bit or -1) <a name="l15"></a></span><span class=cF2>PopCount</span><span class=cF0>: Population Count (Count of set bits) </span></pre></body> </html>