Box64 Dev

Optimizing AVX2

Note: this article is pretty technical. Basic understanding of what registers are is a strict minimum required to understand what follows. What is AVX? AVX (and its extension AVX2) are complex x86_64 instruction sets which extends the SSE4 instruction set. It mandates the existence of extensions of the 16 SSE 128-bits-wide XMM registers (called XMM0…