发明授权
US5193205A Pipeline processor, with return address stack storing only pre-return
processed address for judging validity and correction of unprocessed
address
失效
管道处理器，返回地址堆栈仅存储用于判断有效性的预返回处理地址和未处理地址的校正
- 专利标题： Pipeline processor, with return address stack storing only pre-return processed address for judging validity and correction of unprocessed address
- 专利标题（中）： 管道处理器，返回地址堆栈仅存储用于判断有效性的预返回处理地址和未处理地址的校正
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申请号： US317253申请日： 1989-02-28
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公开(公告)号： US5193205A公开(公告)日： 1993-03-09
- 发明人: Masahito Matsuo , Toyohiko Yoshida
- 申请人： Masahito Matsuo , Toyohiko Yoshida
- 申请人地址： JPX Tokyo
- 专利权人： Mitsubishi Denki Kabushiki Kaisha
- 当前专利权人： Mitsubishi Denki Kabushiki Kaisha
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX63-49093 19880301; JPX63-86704 19880407
- 主分类号： G06F9/32
- IPC分类号： G06F9/32 ; G06F9/38 ; G06F9/40
摘要：
A data processor in accordance with the present invention makes it possible to perform pre-branch processing with respect to a return address in the initial stage of pipeline processing also on a subroutine return instruction, and therefore by providing a stack memory (PC stack) dedicated to a program counter (PC) for storing only return addresses of the subroutine return instruction, in executing a subroutine call instruction in an execution stage of a pipeline processing mechanism, the return address from the subroutine is pushed to the PC stack, and the pre-branch processing is performed to the address popped from the PC stack in decoding the subroutine return instruction in an instruction decoding stage.
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