发明申请
US20090210661A1 METHOD, SYSTEM AND COMPUTER PROGRAM PRODUCT FOR AN IMPLICIT PREDICTED RETURN FROM A PREDICTED SUBROUTINE 失效
方法,系统和计算机程序产品预测从预测的SUBROUTINE返回

METHOD, SYSTEM AND COMPUTER PROGRAM PRODUCT FOR AN IMPLICIT PREDICTED RETURN FROM A PREDICTED SUBROUTINE
摘要:
A method, system and computer program product for performing an implicit predicted return from a predicted subroutine are provided. The system includes a branch history table/branch target buffer (BHT/BTB) to hold branch information, including a target address of a predicted subroutine and a branch type. The system also includes instruction buffers, and instruction fetch controls to perform a method including fetching a branch instruction at a branch address and a return-point instruction. The method also includes receiving the target address and the branch type, and fetching a fixed number of instructions in response to the branch type. The method further includes referencing the return-point instruction within the instruction buffers such that the return-point instruction is available upon completing the fetching of the fixed number of instructions absent a re-fetch of the return-point instruction.
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