公开(公告)号：GB2362968B

公开(公告)日：2003-12-10

申请号：GB9930589

申请日：1999-12-23

Applicant: ST MICROELECTRONICS SA

Inventor： COFLER ANDREW ,  SENAME ISABELLE ,  BERNARD BRUNO ,  WOJCIESZAK LAURENT ,  DEHAMEL ARNAUD

IPC: G06F9/38 ,  G06F11/36 ,  G06F11/07

公开(公告)号：GB2362968A

公开(公告)日：2001-12-05

申请号：GB9930589

申请日：1999-12-23

Applicant: ST MICROELECTRONICS SA

Inventor： COFLER ANDREW ,  SENAME ISABELLE ,  BERNARD BRUNO ,  WOJCIESZAK LAURENT ,  DEHAMEL ARNAUD

IPC: G06F9/38 ,  G06F11/36 ,  G06F11/07

Abstract: A system for executing instructions having assigned guard or prediction indicators, the system comprising instruction supply circuitry, at least one pipelined execution unit for receiving instructions from the supply circuitry together with a guard or prediction indicator selected from a set of guard or prediction indicators. The execution unit includes a master guard value store containing master values for the guard indicators and circuitry for resolving the guard or prediction value of the guard or prediction indicator in the instruction pipeline and providing a signal to indicate if the pipeline is committed to executing the instruction. The system includes an emulator which has watch circuitry for watching selected instructions in the execution pipeline and synchronising circuitry for correlating resolution of the guard or prediction indicator of each selected instruction with a program count for that instruction.