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ARMCC and 64-bit unsigned integers...?

David Sudolcan

There's a knowledgebase article that was last reviewed on June 7, 2005 that says the CARM compiler does not support 64-bit unsigned integers. I'm using the ARMCC compiler (from the RealView MDK-ARM toolchain), and the following code

char s[100];
unsigned int x32;
unsigned long int x64;

sprintf(s,"sizeof(x32)=%u\r\n",sizeof(x32));
printf(s);
sprintf(s,"sizeof(x64)=%u\r\n",sizeof(x64));
printf(s);

produces the following output

sizeof(x32)=4
sizeof(x64)=4

This leads me to believe that the ARMCC tools don't support 64-bit math either.

However, if that's so, why doesn't the above code create any errors or warnings when it's compiled?

Is there a way to get 64-bit unsigned integer support in these tools?

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  • 0 in reply to David Sudolcan

    That was what C51 used to do - and the trouble with that was that it couldn't (or just didn't?) give context-sensitive help from within the IDE.

    But now the ARM tools don't even do the context-senstive help anymore - so they might as well use PDF!

    (and ARM is one of the few companies that does enable annotations on its PDFs)

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  • 0 in reply to David Sudolcan

    That was what C51 used to do - and the trouble with that was that it couldn't (or just didn't?) give context-sensitive help from within the IDE.

    But now the ARM tools don't even do the context-senstive help anymore - so they might as well use PDF!

    (and ARM is one of the few companies that does enable annotations on its PDFs)

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