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| author | ReinUsesLisp <reinuseslisp@airmail.cc> | 2020-11-25 23:03:50 -0300 |
|---|---|---|
| committer | ReinUsesLisp <reinuseslisp@airmail.cc> | 2020-11-25 23:37:56 -0300 |
| commit | 630823e3630f2bb77a3a5e4aa0f8f87859d05ee1 (patch) | |
| tree | 27934d718688e07bea205e85bdc3968a5f4bf461 /src/common/div_ceil.h | |
| parent | 0e15c68f54ae5217e6247603b9e31757515f89e1 (diff) | |
common: Add Common::DivCeil and Common::DivCeilLog2
Add an equivalent to 'Common::AlignUp(n, d) / d' and a log2 alternative.
Diffstat (limited to 'src/common/div_ceil.h')
| -rw-r--r-- | src/common/div_ceil.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/src/common/div_ceil.h b/src/common/div_ceil.h new file mode 100644 index 0000000000..6b2c48f91e --- /dev/null +++ b/src/common/div_ceil.h @@ -0,0 +1,26 @@ +// 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 |