std::simd overloads for bit permutations

1 Constraints: The type V::value_type models integral.

2 Returns: A basic_vec object where the $i^{\text{th}}$ element is initialized to the result of std::byteswap(v[$i$]) for all $i$ in the range [0, V::size()).

¶ Constraints: The type V::value_type is an unsigned integer type ([basic.fundamental]).

¶ Returns: A basic_vec object where the $i^{\text{th}}$ element is initialized to the result of std::bit_reverse(v[$i$]) for all $i$ in the range [0, V::size()).

3 Constraints: The type V::value_type is an unsigned integer type ([basic.fundamental]).

4 Preconditions: For every $i$ in the range [0, V::size()), the smallest power of 2 greater than or equal to v[$i$] is representable as a value of type V::value_type.

5 Returns: A basic_vec object where the $i^{\text{th}}$ element is initialized to the result of std::bit_ceil(v[$i$]) for all $i$ in the range [0, V::size()).

6 Remarks: A function call expression that violates the precondition in the Preconditions: element is not a core constant expression ([expr.const]).

7 Constraints: The type V::value_type is an unsigned integer type ([basic.fundamental]).

8 Returns: A basic_vec object where the $i^{\text{th}}$ element is initialized to the result of std::bit_floor(v[$i$]) for all $i$ in the range [0, V::size()).

9 Constraints: The type V::value_type is an unsigned integer type ([basic.fundamental]).

10 Returns: A basic_mask object where the $i^{\text{th}}$ element is initialized to the result of std::has_single_bit(v[$i$]) for all $i$ in the range [0, V::size()).

11 Constraints:

• The type V0::value_type is an unsigned integer type ([basic.fundamental]),
• the type V1::value_type models integral,
• V0::size() == V1::size() is true, and
• sizeof(typename V0::value_type) == sizeof(typename V1::value_type) is true.

¶ Preconditions: For bit_repeat, v1[$i$] > 0 is true for all $i$ in the range [0, V0::size()).

12 Returns: A basic_vec object where the $i^{\text{th}}$ element is initialized to the result of bit-func(v0[$i$], static_cast<int>(v1[$i$])) for all $i$ in the range [0, V0::size()), where bit-func is the corresponding scalar function from <bit>.

13 Constraints: The type V::value_type is an unsigned integer type ([basic.fundamental]).

¶ Preconditions: For bit_repeat, l > 0 is true.

14 Returns: A basic_vec object where the $i^{\text{th}}$ element is initialized to the result of bit-func(v[$i$], s) for all $i$ in the range [0, V::size()), where bit-func is the corresponding scalar function from <bit>.

15 Constraints: The type V::value_type is an unsigned integer type ([basic.fundamental]).

16 Returns: A basic_vec object where the $i^{\text{th}}$ element is initialized to the result of bit-func(v[$i$]) for all $i$ in the range [0, V::size()), where bit-func is the corresponding scalar function from <bit>.

¶ Constraints: The type V::value_type is an unsigned integer type ([basic.fundamental]).

¶ Returns: A basic_vec object where the $i^{\text{th}}$ element is initialized to the result of bit-func(v[$i$], m[$i$]) for all $i$ in the range [0, V::size()), where bit-func is the corresponding scalar function from <bit>.