Method and system for supporting speculative execution using a speculative look-aside table

摘要

To support speculative execution in a processor, a speculative look aside table (80) stores information about deferred exceptions. Labels (60) attached to predicates in the predicate register file (50) of the processor serve as indices to entires in the speculative look aside table (80). When an exception is generated for a speculative operation, the speculative look aside table (80) is updated. Deferred exceptions are detected and handled when the processor reads the corresponding entry in the speculative look aside table during an explicit or implicit check operation. <IMAGE>