Patent ID: 8099582
Filing Date: 2012-01-17
Classification: G06F

Abstract:
1. A method, in a data processing system, for tracking deallocated load instructions, the method comprising: detecting whether a load instruction in a set of instructions in an issue queue has missed; responsive to a miss of the load instruction, allocating the load instruction to a load miss queue; deallocating the load instruction from the issue queue; determining whether there is a dependence entry for the load instruction in an issue queue portion of a dependence matrix; responsive to the existence of the dependence entry for the load instruction in the issue queue portion of the dependence matrix, reading data from the dependence entry of the issue queue portion of the dependence matrix that specifies a set of dependent instructions that are dependent on the load instruction; and writing the data into a new entry in a load miss queue portion of the dependence matrix associated with the load miss queue.