47 lines
2.3 KiB
HTML
Executable File
47 lines
2.3 KiB
HTML
Executable File
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="generator" content="TempleOS V5.03">
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<meta name="viewport" content="width=device-width">
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<link rel="stylesheet" href="/style/templeos.css">
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<script src="/script/templeos.js"></script>
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<style type="text/css">
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</style>
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</head>
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<body>
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<pre id="content">
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<a name="l1"></a><span class=cF0>
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<a name="l2"></a></span><span class=cF5>These take a pointer to a bit field.</span><span class=cF0>
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<a name="l3"></a></span><span class=cF2>Bt</span><span class=cF0>: Bit Test
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<a name="l4"></a></span><span class=cF2>Bts</span><span class=cF0>: Bit Test and Set to one
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<a name="l5"></a></span><span class=cF2>Btr</span><span class=cF0>: Bit Test and Rst to zero
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<a name="l6"></a></span><span class=cF2>Btc</span><span class=cF0>: Bit Test and Compliment (toggle)
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<a name="l7"></a></span><span class=cF2>BEqu</span><span class=cF0>: Set bit to value.
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<a name="l8"></a>
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<a name="l9"></a>Bit operations are "atomic", no interrupt between the reading and writing the
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<a name="l10"></a>bit, important when multitasking. For multicore use "locked" forms.
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<a name="l11"></a>
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<a name="l12"></a></span><span class=cF5>These don't take a pointer, but the actual field.</span><span class=cF0>
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<a name="l13"></a></span><span class=cF2>Bsf</span><span class=cF0>: Bit Scan Fwd (Pos of first low one bit or -1)
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<a name="l14"></a></span><span class=cF2>Bsr</span><span class=cF0>: Bit Scan Rev (Pos of first high one bit or -1)
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<a name="l15"></a></span><span class=cF2>BCnt</span><span class=cF0>: Bit Cnt (Cnt of set bits)
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</span></pre></body>
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</html>
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