fpadd, fpsub - 2023.2 English

Vitis Tutorials: AI Engine (XD100)

Document ID
Release Date
2023.2 English

Output is the sum (the subtraction) of the input buffers.

vector<float,8> fpadd (vector<float,8> acc, vector<float,32> xbuf, int xstart, unsigned int xoffs)

Parameter Comment
acc First addition input buffer. It has the same type as the output.
xbuf Second addition input buffer.
xstart Starting offset for all lanes of X.
xoffs 4 bits per lane: Additional lane-dependent offset for X.

The executed operation is:

for (i = 0 ; i < 8 ; i++)
  ret[i] = acc[i] + xbuf[xstart + xoffs[i]]

Allowed datatypes:

  • acc: vector<float,8>, vector<cfloat,4>

  • xbuf: vector<float,32>, vector<float,16>, vector<cfloat,16>, vector<cfloat,8>