Method: HDLRuby::High::Std#initialize_lut

Defined in:
lib/HDLRuby/std/function_generator.rb

#initialize_lut(func, otyp, awidth, xrange, yrange) ⇒ Array

Make an array consists of a point of any activation function.

Parameters:

  • lut_size (Integer) —

    the lut_size of LUT

Returns:

  • (Array) —

    table an array consists of a point of tanh



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# File 'lib/HDLRuby/std/function_generator.rb', line 125

def initialize_lut(func, otyp, awidth, xrange, yrange)
    # Compute the x step between discret values.
    xstep = (xrange.last-xrange.first)/(2 ** awidth)

    # Generate the discrete set of x values.
    x_values = xrange.step(xstep)
    # Generate the table.
    table = x_values.map do |x_value|
        ((func.call(x_value)-yrange.first)/(yrange.last-yrange.first)*
         2**otyp.width).to_i.to_expr.as(otyp)
    end

    return table
end