• Locked Locked
  • Replies 7 replies
  • Subscribers 119 subscribers
  • Views 6670 views
  • Users 0 members are here
2025 survey

We are running a survey to help us improve the experience for all of our members. If you see the survey appear, please take the time to tell us about your experience if you can.

Options
Related
How was your experience today?
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

how can I return a value within embedded assembler?

Sebastian Gaertner
Note: This was originally posted on 8th May 2009 at http://forums.arm.com

Hi,

does anybody know how I can write an embedded ASM function that returns the actual PSR value? I prefered to go on like this:

int getCpsr( void )
{
  int currentCPSR;
  MRS currentCPSR, CPSR
  return currentCPSR;
}

how can I return a value within embedded assembler?
Parents
  • Note: This was originally posted on 8th May 2009 at http://forums.arm.com

    Thanks,

    but this is also ARM machine language instruction. I cannot use this inline assembler
    __asm".....


    In this context, AFAIK, it is not inline assembler.  This is just telling the compiler to treat _cpsr as the if it were the APSR register in Cortex-M3 and it will generate the appropriate instructions for you when you use the _cpsr variable.
Reply
  • Note: This was originally posted on 8th May 2009 at http://forums.arm.com

    Thanks,

    but this is also ARM machine language instruction. I cannot use this inline assembler
    __asm".....


    In this context, AFAIK, it is not inline assembler.  This is just telling the compiler to treat _cpsr as the if it were the APSR register in Cortex-M3 and it will generate the appropriate instructions for you when you use the _cpsr variable.
Children
No data