78bb1d1571
0172df743 CMakeLists: Only add tests if MASTER_PROJECT 52e8dff62 0.1.11 fc8d745cc container: hmap fixups 5b5c0130d memory: Add overaligned_unique_ptr c7c9bbd17 mcl: Increment version to 0.1.10 678aa32a8 assert: Handle expr strings separately b38a9d2ef tests: Update to Catch 3.0.1 8aeacfe32 mcl: Increment version to 0.1.9 b468a2ab5 mcl: meta_byte: Split off meta_byte_group d3ae1ae47 mcl: ihmap: Implement inline variant of hmap 5cbfe6eed mcl: hmap: Split detail into headers ee7467677 mcl: hmap: Better default hash f1d902ce9 mcl: hash: Add xmrx 322a221f0 mcl: hmap: Bugfix skip_empty_or_tombstone 689f393f7 mcl: hmap: x64 implementation fa6ff746a mcl: hmap: Add generic meta_byte_group implementation 91e3073ad mcl: hmap: Add more member functions 4998335a5 mcl: Install only if master project 7ff4d2549 mcl: hmap prototype 416a2c6b5 mcl: clang-format: Adopt WebKit style bracing d5a46fa70 mcl/assert: Flush stderr e3b6cc79e externals: Update mcl to 0.1.7 190c68475 mcl: Build as PIC git-subtree-dir: externals/mcl git-subtree-split: 0172df74316351868c215f735e5a2538b10d71fb
58 lines
973 B
C++
58 lines
973 B
C++
// This file is part of the mcl project.
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// Copyright (c) 2022 merryhime
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// SPDX-License-Identifier: MIT
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#pragma once
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#include <bitset>
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#include "mcl/bitsizeof.hpp"
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#include "mcl/concepts/bit_integral.hpp"
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#include "mcl/stdint.hpp"
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namespace mcl::bit {
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template<BitIntegral T>
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inline size_t count_ones(T x)
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{
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return std::bitset<bitsizeof<T>>(x).count();
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}
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template<BitIntegral T>
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constexpr size_t count_leading_zeros(T x)
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{
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size_t result = bitsizeof<T>;
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while (x != 0) {
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x >>= 1;
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result--;
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}
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return result;
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}
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template<BitIntegral T>
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constexpr int highest_set_bit(T x)
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{
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int result = -1;
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while (x != 0) {
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x >>= 1;
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result++;
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}
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return result;
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}
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template<BitIntegral T>
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constexpr size_t lowest_set_bit(T x)
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{
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if (x == 0) {
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return bitsizeof<T>;
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}
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size_t result = 0;
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while ((x & 1) == 0) {
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x >>= 1;
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result++;
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}
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return result;
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}
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} // namespace mcl::bit
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