SIMD - transpose

 Intel SIMD (AVX) transpose intrinsics

Intel® Intrinsics Guide

- _shuffle_* (mask)

- permute (mask)

- _unpacklo_, _unpackhi_

- _MM_TRANSPOSE4_PS & c++ - Fastest way to transpose 4x4 byte matrix - Stack Overflow

Example

https://godbolt.org/z/xzfPqnrdo