How to write 32bits constant into r2

Altera_Forum · ‎09-15-2006

Hi all,

I'm using inline asm and hope to write a 32bits constant which is defined in *.c file into register r2. I have tried the following instruction, but compiler report error:

asm("movhi r2, %hiadj(%0)" :: "i" (0x1000000));

asm("addi r2, r2, %lo(%0)" :: "i" (0x1000000));

ERROR: error: invalid `asm': operand number missing after %-letter

Anybody help?

David

Altera_Forum · ‎09-15-2006

you need an extra '%' :

<span style="color:red">--- asm("movhi r2, %hiadj(%0)" :: "i" (0x1000000));

--- asm("addi r2, r2, %lo(%0)" :: "i" (0x1000000));

+++ asm("movhi r2, %%hiadj(%0)" :: "i" (0x1000000));

+++ asm("addi r2, r2, %%lo(%0)" :: "i" (0x1000000));

</span>

Regards,

--Scott

Altera_Forum · ‎09-17-2006

Thanks very much, Scott...

Can you guide me how to find the related information?

Thanks again,

David

Altera_Forum · ‎09-18-2006

Hi David,

> Can you guide me how to find the related information?

See the gcc manual.

Regards,

--Scott