message: Fix fo unary minus with AVX512 when AVX512DQ is not available.
diff: @@ -115,11 +115,7 @@ template <> struct AutoSIMD<double,8,64>
  #ifdef __AVX512DQ__
  r.m512d = _mm512_xor_pd(_mm512_set1_pd(-0.0), m512d);
  #else
  - // Derived from https://github.com/vectorclass/version2
  - r.m512d = _mm512_castsi512_pd(
  - _mm512_xor_epi32(
  - _mm512_castpd_si512(m512d),
  - _mm512_set1_epi64(0x8000000000000000)));
  + r = 0.0 - (*this);
  #endif
  return r;
  }
  