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AK+Everywhere: Replace __builtin bit functions

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In order to reduce our reliance on __builtin_{ffs, clz, ctz, popcount},
this commit removes all calls to these functions and replaces them with
the equivalent functions in AK/BuiltinWrappers.h.
This commit is contained in:
Nick Johnson 2021-12-19 15:46:55 -06:00 • committed by Andreas Kling
parent 26bb3e1acf
commit 08e4a1a4dc
20 changed files with 108 additions and 115 deletions
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3
Kernel/Memory/PhysicalZone.cpp
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@ -4,6 +4,7 @@
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/BuiltinWrappers.h>
#include <AK/Format.h>
#include <Kernel/Memory/MemoryManager.h>
#include <Kernel/Memory/PhysicalPage.h>
@ -31,7 +32,7 @@ PhysicalZone::PhysicalZone(PhysicalAddress base_address, size_t page_count)
bucket.bitmap.grow(bitmap_size_for_order, false);
}
auto first_order = __builtin_ctz(page_count);
auto first_order = count_trailing_zeroes(page_count);
size_t block_size = 2u << first_order;
auto& bucket = m_buckets[first_order];
size_t remaining_chunk_count = chunk_count;