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Side by Side Diff: nspr/pr/src/misc/prlog2.c

Issue 2078763002: Delete bundled copy of NSS and replace with README. (Closed) Base URL: https://chromium.googlesource.com/chromium/deps/nss@master
Patch Set: Delete bundled copy of NSS and replace with README. Created 4 years, 6 months ago
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1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* This Source Code Form is subject to the terms of the Mozilla Public
3 * License, v. 2.0. If a copy of the MPL was not distributed with this
4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
5
6 #include "prbit.h"
7
8 /*
9 ** Compute the log of the least power of 2 greater than or equal to n
10 */
11 PR_IMPLEMENT(PRIntn) PR_CeilingLog2(PRUint32 n)
12 {
13 PRIntn log2;
14 PR_CEILING_LOG2(log2, n);
15 return log2;
16 }
17
18 /*
19 ** Compute the log of the greatest power of 2 less than or equal to n.
20 ** This really just finds the highest set bit in the word.
21 */
22 PR_IMPLEMENT(PRIntn) PR_FloorLog2(PRUint32 n)
23 {
24 PRIntn log2;
25 PR_FLOOR_LOG2(log2, n);
26 return log2;
27 }
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