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<title>LCOV - skiboot.info - core/bitmap.c</title>
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<td width="10%" class="headerItem">Current view:</td>
<td width="35%" class="headerValue"><a href="../index.html">top level</a> - <a href="index.html">core</a> - bitmap.c<span style="font-size: 80%;"> (source / <a href="bitmap.c.func-sort-c.html">functions</a>)</span></td>
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<td width="10%" class="headerCovTableHead">Hit</td>
<td width="10%" class="headerCovTableHead">Total</td>
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<td class="headerItem">Test:</td>
<td class="headerValue">skiboot.info</td>
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<td class="headerItem">Lines:</td>
<td class="headerCovTableEntry">21</td>
<td class="headerCovTableEntry">21</td>
<td class="headerCovTableEntryHi">100.0 %</td>
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<td class="headerItem">Date:</td>
<td class="headerValue">2023-02-27 20:17:50</td>
<td></td>
<td class="headerItem">Functions:</td>
<td class="headerCovTableEntry">3</td>
<td class="headerCovTableEntry">3</td>
<td class="headerCovTableEntryHi">100.0 %</td>
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<td class="headerCovTableEntry">0</td>
<td class="headerCovTableEntry">0</td>
<td class="headerCovTableEntryHi">-</td>
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<pre class="sourceHeading"> Branch data Line data Source code</pre>
<pre class="source">
<a name="1"><span class="lineNum"> 1 </span> : : // SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later</a>
<a name="2"><span class="lineNum"> 2 </span> : : /* Copyright 2016 IBM Corp. */</a>
<a name="3"><span class="lineNum"> 3 </span> : : </a>
<a name="4"><span class="lineNum"> 4 </span> : : #include "bitmap.h"</a>
<a name="5"><span class="lineNum"> 5 </span> : : </a>
<a name="6"><span class="lineNum"> 6 </span> :<span class="lineCov"> 19 : static int __bitmap_find_bit(bitmap_t map, unsigned int start, unsigned int count,</span></a>
<a name="7"><span class="lineNum"> 7 </span> : : bool value)</a>
<a name="8"><span class="lineNum"> 8 </span> : : {</a>
<a name="9"><span class="lineNum"> 9 </span> : : unsigned int el, first_bit;</a>
<a name="10"><span class="lineNum"> 10 </span> :<span class="lineCov"> 19 : unsigned int end = start + count;</span></a>
<a name="11"><span class="lineNum"> 11 </span> : : bitmap_elem_t e, ev;</a>
<a name="12"><span class="lineNum"> 12 </span> : : int b;</a>
<a name="13"><span class="lineNum"> 13 </span> : : </a>
<a name="14"><span class="lineNum"> 14 </span> :<span class="lineCov"> 19 : ev = value ? -1ul : 0;</span></a>
<a name="15"><span class="lineNum"> 15 </span> :<span class="lineCov"> 19 : el = BITMAP_ELEM(start);</span></a>
<a name="16"><span class="lineNum"> 16 </span> :<span class="lineCov"> 19 : first_bit = BITMAP_BIT(start);</span></a>
<a name="17"><span class="lineNum"> 17 </span> : : </a>
<a name="18"><span class="lineNum"> 18 </span> :<span class="lineCov"> 21 : while (start < end) {</span></a>
<a name="19"><span class="lineNum"> 19 </span> :<span class="lineCov"> 19 : e = map[el] ^ ev;</span></a>
<a name="20"><span class="lineNum"> 20 </span> :<span class="lineCov"> 19 : e |= ((1ul << first_bit) - 1);</span></a>
<a name="21"><span class="lineNum"> 21 </span> :<span class="lineCov"> 19 : if (~e)</span></a>
<a name="22"><span class="lineNum"> 22 </span> :<span class="lineCov"> 17 : break;</span></a>
<a name="23"><span class="lineNum"> 23 </span> :<span class="lineCov"> 2 : start = (start + BITMAP_ELSZ) & ~(BITMAP_ELSZ - 1);</span></a>
<a name="24"><span class="lineNum"> 24 </span> :<span class="lineCov"> 2 : first_bit = 0;</span></a>
<a name="25"><span class="lineNum"> 25 </span> :<span class="lineCov"> 2 : el++;</span></a>
<a name="26"><span class="lineNum"> 26 </span> : : }</a>
<a name="27"><span class="lineNum"> 27 </span> :<span class="lineCov"> 214 : for (b = first_bit; b < BITMAP_ELSZ && start < end; b++,start++) {</span></a>
<a name="28"><span class="lineNum"> 28 </span> :<span class="lineCov"> 212 : if ((e & (1ull << b)) == 0)</span></a>
<a name="29"><span class="lineNum"> 29 </span> :<span class="lineCov"> 17 : return start;</span></a>
<a name="30"><span class="lineNum"> 30 </span> : : }</a>
<a name="31"><span class="lineNum"> 31 </span> : : </a>
<a name="32"><span class="lineNum"> 32 </span> :<span class="lineCov"> 2 : return -1;</span></a>
<a name="33"><span class="lineNum"> 33 </span> : : }</a>
<a name="34"><span class="lineNum"> 34 </span> : : </a>
<a name="35"><span class="lineNum"> 35 </span> :<span class="lineCov"> 17 : int bitmap_find_zero_bit(bitmap_t map, unsigned int start, unsigned int count)</span></a>
<a name="36"><span class="lineNum"> 36 </span> : : {</a>
<a name="37"><span class="lineNum"> 37 </span> :<span class="lineCov"> 17 : return __bitmap_find_bit(map, start, count, false);</span></a>
<a name="38"><span class="lineNum"> 38 </span> : : }</a>
<a name="39"><span class="lineNum"> 39 </span> : : </a>
<a name="40"><span class="lineNum"> 40 </span> :<span class="lineCov"> 2 : int bitmap_find_one_bit(bitmap_t map, unsigned int start, unsigned int count)</span></a>
<a name="41"><span class="lineNum"> 41 </span> : : {</a>
<a name="42"><span class="lineNum"> 42 </span> :<span class="lineCov"> 2 : return __bitmap_find_bit(map, start, count, true);</span></a>
<a name="43"><span class="lineNum"> 43 </span> : : }</a>
<a name="44"><span class="lineNum"> 44 </span> : : </a>
</pre>
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