SSE4.1 provides negation intrinsics so use them for AVX at least
SSE4.1 provides negation intrinsics so use them for AVX at least

VcDevel/Vc,VcDevel/Vc,chr-engwer/Vc,chr-engwer/Vc,VcDevel/Vc,chr-engwer/Vc,VcDevel/Vc