mirror of
https://github.com/citra-emu/citra.git
synced 2024-11-26 22:00:05 +00:00
bd7ee8c315
In cases where the size is not a known constant when inlining, AlignUp<std::size_t> currently generates two 64-bit div instructions. This generates one div and a cmov which is significantly cheaper.
25 lines
597 B
C++
25 lines
597 B
C++
// This file is under the public domain.
|
|
|
|
#pragma once
|
|
|
|
#include <cstddef>
|
|
#include <type_traits>
|
|
|
|
namespace Common {
|
|
|
|
template <typename T>
|
|
constexpr T AlignUp(T value, std::size_t size) {
|
|
static_assert(std::is_unsigned_v<T>, "T must be an unsigned value.");
|
|
auto mod{value % size};
|
|
value -= mod;
|
|
return static_cast<T>(mod == T{0} ? value : value + size);
|
|
}
|
|
|
|
template <typename T>
|
|
constexpr T AlignDown(T value, std::size_t size) {
|
|
static_assert(std::is_unsigned_v<T>, "T must be an unsigned value.");
|
|
return static_cast<T>(value - value % size);
|
|
}
|
|
|
|
} // namespace Common
|