Vector and Accumulator Conversions

Overview

Vectors can be reinterpreted as vectors with a different element type, as long as they have the same total size.

      aie::vectorv;
     

      aie::vectorv2;
     

      aie::vectorv3;
     


      v2 = v.cast_to<
      int32>(v);
     


      v3 = aie::vector_cast(v);
     

Vectors can be converted into accumulators. Their values can be shifted into a larger magnitude to implement fixed point precision schemes (this does not apply to floating point accumulators).

      aie::vectorv;
     

      aie::accumacc;
     


      acc.from_vector(v,
      shift);
     

Conversely, accumulators can be converted into vectors. Their values can be shifted down before rounding and saturation is applied (this does not apply to floating point accumulators).

      aie::accumacc;
     

      aie::vectorv;
     


      v = acc.to_vector<
      int16>(
      shift);
     

Functions
template<ElemBaseTypeDstT,VectorVec>
auto	aie::vector_cast(const Vec &v)
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Function Documentation

vector_cast()

template< ElemBaseTypeDstT, VectorVec>

auto aie::vector_cast

(

const Vec &

v

)

Reinterpret a vector using a different element type. The returned vector has the same size in bits as the input vector.

Template Parameters

DstT	Element type for the returned vector.

Parameters

v	Input vector.