alt Hacker NewsTake a look at the micro-architecture levels. x86-64-v1 contains all the instructions that the original AMD64 and compatible Intel CPUs supported. v2 is all the SSE levels, v3 is AVX and AVX2, v4 is AVX-512.
https://en.wikipedia.org/wiki/X86-64#Microarchitecture_level...
The wiki says:
"Additional XMM (SSE) registers: Similarly, the number of 128-bit XMM registers (used for Streaming SIMD instructions) is also increased from 8 to 16...
"The original AMD64 architecture adopted Intel's SSE and SSE2 as core instructions."
https://en.wikipedia.org/wiki/X86-64
This wansn't v2?