x86 doesn't have a lot of non-temporal vector stores but we do have a
few of them.
- MMX: MOVNTQ
- SSE2: MOVNTDQ, MOVNTPS, MOVNTPD
- AVX: VMOVNTDQ (128-bit & 256-bit), VMOVNTPD
Additionally SSE4a adds 32-bit and 64-bit scalar vector non-temporal
stores, which we keep as regular stores. Since ARM doesn't have matching
semantics for those.
Additionally SSE4.1 adds non-temporal vector LOADS which this doesn't
touch.
- SSE4.1: MOVNTDQA
- AVX: VMOVNTDQA (128-bit)
- AVX2: VMOVNTDQA (256-bit)
Fixes#3364