发明授权
- 专利标题： Floating point stack and exchange instruction
- 专利标题（中）： 浮点堆栈和交换指令
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申请号： US967950申请日： 1997-11-12
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公开(公告)号： US5857089A公开(公告)日： 1999-01-05
- 发明人: Michael D. Goddard , Scott A. White
- 申请人： Michael D. Goddard , Scott A. White
- 申请人地址： CA Sunnyvale
- 专利权人： Advanced Micro Devices, Inc.
- 当前专利权人： Advanced Micro Devices, Inc.
- 当前专利权人地址： CA Sunnyvale
- 主分类号： G06F7/78
- IPC分类号： G06F7/78 ; G06F9/30 ; G06F9/315 ; G06F9/38
摘要：
In a processor (110) that performs multiple instructions in a single cycle, predicts outcomes of branch conditions and speculatively executes instructions based on the branch predictions, a method and apparatus for operating a data stack utilize a remap array (674) to support a stack exchange capability. The remap array is used to correlate a stack pointer (672) to data elements (700) within the stack. A lookahead stack pointer (502) and remap array (504) are updated to preserve the processor's state of operation while speculative instructions are executed.
公开/授权文献
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