Invention Grant
- Patent Title: Carryless multiplication unit
- Patent Title (中): 无载乘法单元
-
Application No.: US12960231Application Date: 2010-12-03
-
Publication No.: US08645448B2Publication Date: 2014-02-04
- Inventor: Timothy A. Elliott
- Applicant: Timothy A. Elliott
- Applicant Address: TW New Taipei
- Assignee: VIA Technologies, Inc.
- Current Assignee: VIA Technologies, Inc.
- Current Assignee Address: TW New Taipei
- Agent Richard K. Huffman; James W. Huffman
- Main IPC: G06F7/00
- IPC: G06F7/00 ; G06F7/38

Abstract:
An apparatus having a carryless preformat unit, a Booth encoder, a compressor, a left shifter, and exclusive-OR logic. The carryless preformat unit receives a multiplier operand and partitions the multiplier operand into parts. The Booth encoder receives the parts and directs selection of first partial products of a multiplicand that do not reflect implicit carry operations. The compressor sums the first partial products via a configuration of carry save adders that generate sum bits and carry bits, where generation of the carry bits is disabled during execution of the carryless multiplication. The left shifter shifts bits of one or more outputs of the compressor. The exclusive-OR logic is coupled to the compressor and the left shifter, and is configured to execute an exclusive-OR function on the outputs to yield a carryless multiplication result.
Public/Granted literature
- US20120143933A1 CARRYLESS MULTIPLICATION UNIT Public/Granted day:2012-06-07
Information query