Manually vectorize for at least SSE4.2 #4550
Merged
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Resolves #4536
Also checked and improved where can take advantage of new assumptions:
_mm_set1_epi8
replaced with_mm_shuffle_epi8
with zero input, slight improvement for 1-byte elementsfind
andcount
__std_bitset_to_string_*
_mm_shuffle_epi8
to populate a__m128i
variable instead of the sequence_mm_blendv_epi8
to avoidxor
Didn't measure the results. If measured on a modern machine, that would be artificial to alter
__isa_enabled
, and still not relevant.Also removed SSE level of instructions from comments. Kept
__popcnt
comment though.