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WEIGHTED_SUM

NAME
SYNOPSIS
DESCRIPTION
FUNCTIONS
PINS
PARAMETERS

NAME

weighted_sum − convert a group of bits to an integer

SYNOPSIS

loadrt weighted_sum wsum_sizes=size[,size,...]

Creates weighted sum groups each with the given number of input bits (size).

DESCRIPTION

This component is a "weighted summer": Its output is the offset plus the sum of the weight of each TRUE input bit. The default value for each weight is 2^n where n is the bit number. This results in a binary to unsigned conversion.

There is a limit of 8 weighted summers and each may have up to 16 input bits.

FUNCTIONS

process_wsums

Read all input values and update all output values.

PINS

wsum.N.bit.M.in bit in

The m’th input of weighted summer n.

wsum.N.hold bit in

When TRUE, the sum output does not change. When FALSE, the sum output tracks the bit inputs according to the weights and offset.

wsum.N.sum signed out

The output of the weighted summer

PARAMETERS

wsum.N.bit.M.weight signed rw

The weight of the m’th input of weighted summer n. The default value is 2^m.

wsum.N.offset signed rw

The offset is added to the weights corresponding to all TRUE inputs to give the final sum.