<!DOCTYPE HTML> <html> <head> <meta http-equiv="Content-Type" content="text/html;charset=US-ASCII"> <meta name="generator" content="ZealOS V1.08"> <style type="text/css"> body {background-color:#1f1f1f;} .cF0{color:#e3e3e3;background-color:#1f1f1f;} .cF1{color:#4f84a6;background-color:#1f1f1f;} .cF2{color:#73a255;background-color:#1f1f1f;} .cF3{color:#297582;background-color:#1f1f1f;} .cF4{color:#b34f4b;background-color:#1f1f1f;} .cF5{color:#8a52c3;background-color:#1f1f1f;} .cF6{color:#b7822f;background-color:#1f1f1f;} .cF7{color:#444444;background-color:#1f1f1f;} .cF8{color:#6d6d6d;background-color:#1f1f1f;} .cF9{color:#94bfde;background-color:#1f1f1f;} .cFA{color:#a1ce97;background-color:#1f1f1f;} .cFB{color:#6db4be;background-color:#1f1f1f;} .cFC{color:#e88e88;background-color:#1f1f1f;} .cFD{color:#ca94e8;background-color:#1f1f1f;} .cFE{color:#d4b475;background-color:#1f1f1f;} .cFF{color:#1f1f1f;background-color:#1f1f1f;} </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>