For a store_first(ptr, vec, 1) with SSE2, it could result into a _mm_store_ss() ?

[abique]

libsimdpp/simdpp/detail/insn/store_first.h

Line 53 in 9dac213

static const uint8_t mask_d[32] = {0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,