Can 750 user-mode binaries run on a 603e core?

[Patrick J. Kelsey]

	-----Original Message----- 
	From: linuxppc-dev-bounces+kelseypj=fairmountautomation.com at ozlabs.org on behalf of Kumar Gala 
	Sent: Wed 7/26/2006 8:04 PM 
	To: Patrick J. Kelsey 
	Cc: linuxppc-dev at ozlabs.org 
	Subject: Re: Can 750 user-mode binaries run on a 603e core?
	
	


	On Jul 26, 2006, at 5:27 PM, Patrick J. Kelsey wrote:
	
	> Hi,
	>
	> If have user-mode binaries built for a 750 core, say with gcc -
	> mcpu=750, should I expect them to run on a 603e core?  Would I have 
	> to worry about unsupported instructions or instruction scheduling 
	> issues?
	>
	> If there's a better list for this question, please advise.
	
	Sure, there isn't different in the user space instruction sets 
	between the 750 and 603e core.  The -mcpu is only tweaking 
	instruction scheduling and making it specific for the 750.  The 
	instruction scheduling differences aren't that huge if memory serves 
	me correctly.  The 750 probably takes fewer cycles on multiple and 
	divides.  I forget if the 750 has any additional execution units that 
	the 603e didn't have (additional integer units, etc.).
	
	- kumar
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