Wisconsin Alumni Research Foundation

National Science Foundation

Marc Asher De Kruijf

Karthikeyan Sankaralingam

Jaikrishnan Menon

Chen-Han Ho

A computer architecture allows for simplified exception handling by restarting the program after exceptions at the beginning of idempotent regions, the idempotent regions allowing re-execution without the need for restoring complex state information from checkpoints. Recovery from mis-speculation may be provided by a similar mechanism but using smaller idempotent regions reflecting a more frequent occurrence of mis-speculation. A compiler generating different idempotent regions for speculation and exception handling is also disclosed.

Computer processor providing exception handling with reduced state storage

A computer architecture allows for simplified recovery after mis-speculation during speculative execution by controlling speculation to occur within idempotent regions that may be recovered by re-execution of the region without the need for restoring complex state information from checkpoints. A compiler for increasing the size of idempotent regions is also disclosed.

Growing community of inventors

Madison, WI, United States of America

Marc Asher De Kruijf