wim questions

wim answers

• Rotating (by 90°) a bit matrix (up to 8x8 bits) within a 64-bit integer
• Intel vector instruction to zero-extend 8 4-bit values packed in a 32-bit int to a __m256i?
• What is the fastest inverse of _mm_movemask_ps()?
• Auto-vectorize shuffle instruction
• AVX2 Transpose of a matrix represented by 8x __m256i registers
• Multishift operation
• Is there an function in AVX512 like _mm512_sign_epi16 (__m512i a, __m512i b)
• set individual bit in AVX register (__m256i), need "random access" operator
• Horizontal XOR in AVX
• Setting last or first n bits in SSE register