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variable reference in assembly

Altera_Forum
Honored Contributor II
‎01-18-2007 08:39 PM
1,086 Views

Hello! 

 

I would like to know how to get the location of an external variable in asm code so that I have access to reading or writing to that variable. For eg. 

 

extern int x; 

 

asm ( 

 

// I want to move the address of int x to r2 for reading or writing to x 

 

) 

 

Any and all help is greatly appreciated 

Thanx
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Altera_Forum
Honored Contributor II
‎01-18-2007 08:51 PM
405 Views

oops! I should have combed through the instruction set more closely. I suppose the instruction "movia" comes in handy as follows 

 

extern int x; 

 

asm ( 

" movia r2, x \n\t" 

"..." 

)
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