SSSE3 checks

[hellrot]

There are two places protected with a check of PHMAP_HAVE_SSSE3, both in phmap.h. The protected intrinsics, _mm_movemask_epi8 and _mm_or_si128, are both SSE2 intrinsics.

It seems you could just remove those checks, the corresponding the #else case code, and simplify phmap_config.h to only test for (and require) SSE2.

[greg7mdp]

Thanks for the suggestion, but these two places also require _mm_sign_epi8 and _mm_shuffle_epi8 which are SSE3 if I'm not mistaken.

[hellrot]

Oops. You are correct, I overlooked those.