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how can I return a value within embedded assembler?

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?

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zart zurt over 12 years ago

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?

[url="http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.kui0098a/armccref_cjahjdbg.htm"]http://infocenter.arm.com/help/index.jsp?t...ef_cjahjdbg.htm[/url]

ui32 read_cpsr()
{
register ui32 _cpsr __asm("cpsr");
// ...
return _cpsr;
}

I could not test this as I do not have a Cortex-M3 cpu...
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zart zurt over 12 years ago

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?

[url="http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.kui0098a/armccref_cjahjdbg.htm"]http://infocenter.arm.com/help/index.jsp?t...ef_cjahjdbg.htm[/url]

ui32 read_cpsr()
{
register ui32 _cpsr __asm("cpsr");
// ...
return _cpsr;
}

I could not test this as I do not have a Cortex-M3 cpu...
Cancel
Vote up 0 Vote down

Cancel

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