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common/div_ceil: Return numerator type

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Fixes instances where DivCeil(u32, u64) would surprisingly return u64,
instead of the more natural u32.
This commit is contained in:
ReinUsesLisp 2021-01-09 03:14:18 -03:00
parent 8eea7c1176
commit c190586597
1 changed files with 5 additions and 5 deletions
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10
src/common/div_ceil.h
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@ -11,16 +11,16 @@ 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;
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 auto DivCeilLog2(
requires std::is_integral_v<N>&& std::is_unsigned_v<D>[[nodiscard]] constexpr N DivCeilLog2(
N value, D alignment_log2) {
return (static_cast<D>(value) + (D(1) << alignment_log2) - 1) >> alignment_log2;
return static_cast<N>((static_cast<D>(value) + (D(1) << alignment_log2) - 1) >> alignment_log2);
}
} // namespace Common