suyu/src/common/div_ceil.h
ReinUsesLisp c190586597 common/div_ceil: Return numerator type
Fixes instances where DivCeil(u32, u64) would surprisingly return u64,
instead of the more natural u32.
2021-01-09 03:16:10 -03:00

26 lines
894 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 N DivCeil(N number,
D divisor) {
return static_cast<N>((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 N DivCeilLog2(
N value, D alignment_log2) {
return static_cast<N>((static_cast<D>(value) + (D(1) << alignment_log2) - 1) >> alignment_log2);
}
} // namespace Common