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Technology Stocks : Advanced Micro Devices - Moderated (AMD)

AMD 217.54

+1.5%

Nov 28 12:59 PM EST

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To: pgerassi who wrote (74101)	3/9/2002 6:51:57 PM
From: Joe NYC	Read Replies (2) of 275872

Pete, This helps both function calls and automatic variables. The calls are helped because more registers are available to hold parameters instead of them being on the stack with all of the attended cache costs. Some auto variables will be optimized to register status. Can this be done (using registers instead of pushing parameters on the stack)? I have my doubts about it. Isn't the result just the opposite, that is when a function is called, doesn't more registers need to be stored? My assembly skills are extremely rusty, (as you can probably tell from the question), maybe you can refresh my memory. What happens when a function is called? Can you assume that the state of the registers is the same as prior to the call? If the answer is yes, they need to be stored someplace (on stack), so 8 extra registers presents extra overhead? Is there a shortcut for finding out which registers need to be saved? Joe

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