suyu/src/common/div_ceil.h
ReinUsesLisp 630823e363 common: Add Common::DivCeil and Common::DivCeilLog2
Add an equivalent to 'Common::AlignUp(n, d) / d' and a log2 alternative.
2020-11-25 23:37:56 -03:00

26 lines
785 B
C++

// Copyright 2020 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <cstddef>
#include <type_traits>
namespace Common {
/// Ceiled integer division.
template <typename N, typename D>
requires std::is_integral_v<N>&& std::is_unsigned_v<D>[[nodiscard]] constexpr auto DivCeil(
N number, D divisor) {
return (static_cast<D>(number) + divisor - 1) / divisor;
}
/// Ceiled integer division with logarithmic divisor in base 2
template <typename N, typename D>
requires std::is_integral_v<N>&& std::is_unsigned_v<D>[[nodiscard]] constexpr auto DivCeilLog2(
N value, D alignment_log2) {
return (static_cast<D>(value) + (D(1) << alignment_log2) - 1) >> alignment_log2;
}
} // namespace Common