title: Are there ARM64 equivalents for x86-64 SSE2 integer SIMD GCC built-in functions?
body: <p>Im trying to use an AMM-Algorithm (approximate-matrix-multiplication; on Apple's M1), which is fully based on speed and uses the x86 built-in functions listed below. Since using a VM for x86 slows down several crucial processes in the algorithm, I was wondering if there is another way to run it on ARM64.</p>
  <p>I also could not find a fitting documentation for the ARM64 built-in functions, which could eventually help mapping some of the x86-64 instructions.</p>
  <p>Used built-in functions:</p>
  <pre><code>__builtin_ia32_vec_init_v2si
  __builtin_ia32_vec_ext_v2si
  __builtin_ia32_packsswb
  __builtin_ia32_packssdw
  __builtin_ia32_packuswb
  __builtin_ia32_punpckhbw
  __builtin_ia32_punpckhwd
  __builtin_ia32_punpckhdq
  __builtin_ia32_punpcklbw
  __builtin_ia32_punpcklwd
  __builtin_ia32_punpckldq
  __builtin_ia32_paddb
  __builtin_ia32_paddw
  __builtin_ia32_paddd
  </code></pre>