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need some help with inline assembler (addcs)

Hello,

I want add some inline assembler in my c-code: but at the moment I get some errors.


 unsigned int sum=0;

 __asm ("adds   %0, %1, %1, lsl #16   \n\ 
                         addcs   %0, %0, #0x10000"
                        : "=r" (sum)
                        : "r" (sum)
                        : "cc");
                        return (~sum) >> 16;

The error messages for this line (addcs %0, %0, #0x10000") are "expected an expression" and "Missing operand". Do Keil know the assembler code "addcs"?

best regards
Tim

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0 Christoph Franck over 16 years ago

Do Keil know the assembler code "addcs"?

No, is doesn't. ADDCS is not a valid ARM assembly memonic. I guess you are looking for ADCS.

Also, did you make sure that the compiler produces code that is not optimal? Especially for something as simple as adding a few numbers together, I wouldn't believe that the compiler messes things up.
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0 Christoph Franck over 16 years ago

Do Keil know the assembler code "addcs"?

No, is doesn't. ADDCS is not a valid ARM assembly memonic. I guess you are looking for ADCS.

Also, did you make sure that the compiler produces code that is not optimal? Especially for something as simple as adding a few numbers together, I wouldn't believe that the compiler messes things up.
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