public override Signal Backward(ComputeShader compute, Signal dout)
{
dbeta = Refresh(1, dout.Columns, dbeta);
MatOperations.SumMV(compute, dout, dbeta);
dgamma = Refresh(1, dout.Columns, dgamma);
MatOperations.MulMM(compute, dout, xn);
MatOperations.SumMV(compute, xn, dgamma);
var dxn = new Signal(dout);
MatOperations.MulMVM(compute, dout, gamma, dxn);
var dxc = new Signal(dxn);
MatOperations.DivMVM(compute, dxn, std, dxc);
var dxn_x_xc = new Signal(dxn);
MatOperations.MulMMM(compute, dxn, xc, dxn_x_xc);
dxn.Dispose();
var std_x_std = new Signal(std);
MatOperations.MulMMM(compute, std, std, std_x_std);
var dxn_x_xc_div_std_x_std = new Signal(dxn_x_xc);
MatOperations.DivMVM(compute, dxn_x_xc, std_x_std, dxn_x_xc_div_std_x_std);
dxn_x_xc.Dispose();
std_x_std.Dispose();
var dstd = new Signal(std);
MatOperations.SumMV(compute, dxn_x_xc_div_std_x_std, dstd);
dxn_x_xc_div_std_x_std.Dispose();
var dvar = new Signal(dstd);
DVar(compute, dstd, std, dvar);
dstd.Dispose();
DXc(compute, xc, dvar, dxc, 2f / batchSize);
dvar.Dispose();
var dmu = new Signal(1, dxc.Columns);
MatOperations.SumMV(compute, dxc, dmu);
var dx = new Signal(dout);
DX(compute, dxc, dmu, dx, 1f / batchSize);
dxc.Dispose();
dmu.Dispose();
return(dx);
}
public override Signal Backward(ComputeShader compute, Signal dout)
{
var dx = new Signal(dout.Rows, weights.Rows);
MatOperations.MultiplyMT(compute, dout, weights, dx);
// dx.Log();
dW = Refresh(x.Columns, dout.Columns, dW);
MatOperations.MultiplyTM(compute, x, dout, dW);
dB = Refresh(1, dout.Columns, dB);
MatOperations.SumMV(compute, dout, dB);
// dx.Log();
// dw.Log();
// db.Log();
return(dx);
}