Browse Prior Art Database

Utilizing a Decode History Table Accessed at I-fetch Time to Change Cache Bus Priorities

IP.com Disclosure Number: IPCOM000059578D
Original Publication Date: 1988-Dec-01
Included in the Prior Art Database: 2005-Feb-16

Publishing Venue

IBM

Related People

Authors:
Emma, PG Knight, JW Pomerene, JH Puzak, TR [+details]

Abstract

A technique is described whereby the instruction fetching is improved by utilizing decode history table (DHT) information, with no impairment vis-a-vis collisions. The concept uses this information to change cache bus priority and allows instruction fetching on the guessed-not-taken path when a conditional branch that is guessed-not-taken is decoded.