发明名称 |
Method and apparatus for reordering memory operations along multiple execution paths in a processor |
摘要 |
A method is provided for scheduling instructions for execution along multiple paths in a Computer processing system implementing out-of-order execution. The method includes the step of selecting and moving a next instruction from its current position in a sequence of instructions to an earlier position. It is determined whether the selected instruction may reference a memory location for read-access. It is determined whether the selected instruction was previously moved over a non-selected instruction which may ambiguously reference the memory location, when the selected instruction may reference the memory location for read-access. It is determined whether the selected instruction was previously moved over a branch instruction, when the selected instruction was previously moved over the non-selected instruction. A record of the selected instruction is stored for future reference, when the selected instruction was previously moved over the branch instruction. The record includes a path specifier for indicating a path from a current locus of execution to a basic block corresponding to a in-order position of the selected instruction.
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申请公布号 |
US6381691(B1) |
申请公布日期 |
2002.04.30 |
申请号 |
US19990374255 |
申请日期 |
1999.08.13 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
ALTMAN ERIK;GSCHWIND MICHAEL K. |
分类号 |
G06F9/38;(IPC1-7):G06F9/312 |
主分类号 |
G06F9/38 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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