Exemple #1
0
  template<class Extension,class Info>
  struct call<nbtrue_,tag::simd_(tag::arithmetic_,Extension),Info>
  {
    typedef int32_t result_type; 

    NT2_FUNCTOR_CALL_DISPATCH(
      1,
      typename nt2::meta::scalar_of<A0>::type,
      (3, (float,double,arithmetic_))
    )

    NT2_FUNCTOR_CALL_EVAL_IF(1,       float)
    {
      typedef typename meta::as_real<A0>::type type; 
      int32_t  r = _mm256_movemask_ps(isnez(a0));
      return   (r&1)+((r>>1)&1)+((r>>2)&1)+(r>>3&1)+((r>>4)&1)+((r>>5)&1)+(r>>6&1)+(r>>7);
      //      return __builtin_popcount(_mm_movemask_ps(isnez(cast<type>(a0))));
    }
    NT2_FUNCTOR_CALL_EVAL_IF(1,      double)
    {
      int32_t  r = _mm256_movemask_pd(isnez(a0));
      return   (r&1)+(r>>1&1)+((r>>2)&1)+(r>>3); 
    }
    NT2_FUNCTOR_CALL_EVAL_IF(1, arithmetic_)
    {
      typedef typename meta::scalar_of<A0>::type sctype;		
      typedef typename simd::native<sctype, tag::sse_ >  svtype;	
      svtype a00 = { _mm256_extractf128_si256(a0, 0)};			
      svtype a01 = { _mm256_extractf128_si256(a0, 1)};
      return nbtrue(a00)+nbtrue(a01); 
Exemple #2
0
                       ((simd_<uint8_<A0>,tag::xop_>))
                      );

namespace nt2 { namespace ext
{
  template<class Dummy>
  struct call<tag::sqrt_(tag::simd_<tag::uint8_, tag::xop_)),
              tag::cpu_, Dummy> : callable
  {
    template<class Sig> struct result;
    template<class This,class A0>
    struct result<This(A0)>  : meta::strip<A0>{};//

    NT2_FUNCTOR_CALL(1)
    {
      A0 const na  = isnez(a0);
      A0 n   = add(shri(a0, 4), Four<A0>());
      A0 n1  = shri(n+a0/n, 1);
      A0 msk = b_and(isle(n1,n), na);

      n   = select(msk,n1,n);
      n1  = sqr(n);
      msk = b_or(isgt(n1,a0), b_and(iseqz(n1), na));
      n   = seladd( msk, n, Mone<A0>());

      return seladd(na, Zero<A0>(), n);
    }
  };
} }

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