fixes for non-avx targets #239
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when emulating avx for non-avx targets, the _m256i type is being typedef'd, however, this type is defined in avxintrin.h which is only included via immintrin.h if avx is enabled. I've added an inline definition that seems to work on my x86_64 machine with clang when __AVX__ is not defined. Also, mm256_maddubs_epi16 was unable to compile for non-avx targets, I've addressed this by only defining this function when either __AVX2__ or __SSSE3__ is defined.
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when emulating avx for non-avx targets, the
_m256itype is being typedef'd, however, this type is defined inavxintrin.hwhich is only included viaimmintrin.hif avx is enabled. I've added an inline definition that seems to work on my x86_64 machine with clang when__AVX__is not defined.Also,
mm256_maddubs_epi16was unable to compile for non-avx targets, I've addressed this by only defining this function when either__AVX2__or__SSSE3__is defined.