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questions about builtin Functions

Altera_Forum
Honored Contributor II
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hi.i need some information about builtin Functions,is there any online resources available? And where to find?thank you so much to provide me with a web page link:)

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Altera_Forum
Honored Contributor II
306 Views

added:builtin function of nios 2

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Altera_Forum
Honored Contributor II
306 Views
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Altera_Forum
Honored Contributor II
306 Views

I am also looking information about builtin functions such as __builtin_rdctl, which seems to me like a wrapper function from assembly makro rdctl to C code. Actualy I wonder if they are defined in a file, I couldn't find the definiton or any related document about it. 

 

Also would it be a problem if I redefine it in my projects?
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Altera_Forum
Honored Contributor II
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They are defined in the C sources for gcc, writing asm macros for them is a SMOP (and understanding the gcc asm statement rules).

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