×

Circuit design methods and tools

  • US 5,910,898 A
  • Filed: 12/14/1995
  • Issued: 06/08/1999
  • Est. Priority Date: 12/14/1995
  • Status: Expired due to Term
First Claim
Patent Images

1. A method for bit-reversing signal flow in the operation of a circuit design tool, said method comprising the steps of:

  • receiving a first description of a component structure having a set of bitslices, each one of said set of bitslices having a logic block, and each one of said set of bitslices operating on an input bit, producing an output bit, having a carry signal input and a carry signal output, wherein a carry signal output corresponding to a selected one of said set of bitslices is coupled to a carry signal input of a next one of said set of bitslices, said carry signal output being responsive to said carry signal input, said carry signals having a directional signal flow;

    replacing each one of said set of bitslices with a first carry-logic block and a second logic block representing behavioral characteristics of said one of said set of bitslices;

    replacing carry-logic blocks coupled in series with a merge-carry block;

    constructing a logical truth table in response to said replacing steps;

    combining said second logic block with said merge-carry block using said logical truth table; and

    constructing a functional description for each said second logic block.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×