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push25中的更新$r8 http://forum.andestech.com/viewtopic.php?f=14&t=659 |
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Author: | cindy [ Fri Jan 18, 2013 4:27 pm ] |
Post subject: | push25中的更新$r8 |
在V3指令的push25中,有1個步驟是將$pc記到$r8裡。 這個用途是將$r8當base,取出function的起點, 往前可以抓參數。 實作上會用到的指令是 LWI45.FE (Load Word Immediate with Implied Function Entry Point) 也可以在ISA裡面看到。 |
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