Patent ID: 7594094
Filing Date: 2009-09-22
Classification: G06F

Abstract:
1. A method for executing a machine instruction in a central processing unit, the method comprising the steps of: fetching a machine instruction for execution, the machine instruction being defined for computer execution according to a computer architecture, the machine instruction comprising an opcode field, a first operand base address field, a first operand displacement field, a second operand base address field, a second operand displacement field and a third general register field; executing said fetched machine instruction, the execution comprising: determining a first operand address based on contents of a first general register specified by said first operand base address field and; determining a second operand address based on contents of a second general register specified by said second operand base address field; obtaining from a fourth general register, a first address space indicator, said first address space indicator identifying a first address space; obtaining from said fourth general register, a second address space indicator, said second address space indicator identifying a second address space, wherein the second address space indicator identifies a second system register having a second translation table origin address of a second translation table of said second address space; accessing a first memory location specified by the first operand address of the first address space, wherein the first address space indicator identifies a first system register having a first translation table origin address of a first translation table of said first address space; translating said second operand address using said second translation table to determine a location in memory of said second operand; translating said first operand address using said first translation table to determine a location in memory of said first operand; accessing a second memory location specified by the second operand address of the second address space; and performing an operation on data accessed at any one of said first memory location or said second memory location, the operation specified by the opcode field, the operation comprising moving a block of data from the second memory location to the first memory location.