[avr-libc-dev] [bug #31768] Difference in address between using a direct var or through a struct

[Joerg Wunsch]

Update of bug #31768 (project avr-libc):

                  Status:                    None => Works For Me           
             Assigned to:                    None => aboyapati              

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Follow-up Comment #1:

To me, it seems this has been fixed in recent versions of
the library.  If I compile the following C code:

#include <avr/io.h>

void foo(void)
{
  ADCA.CH0.MUXCTRL = ADC_CH_MUXPOS_PIN0_gc;
  ADCA_CH0_MUXCTRL = ADC_CH_MUXPOS_PIN0_gc;
}

into assembly for an ATxmega64D3, I get the following
assembler code:

foo:
/* prologue: function */
/* frame size = 0 */
        ldi r30,lo8(512)
        ldi r31,hi8(512)
        std Z+33,__zero_reg__
        sts 545,__zero_reg__
/* epilogue start */
        ret

As 512+33 = 545, both operations perform the same thing.

The difference in your posting is 6 bytes, which could
perhaps be accounted to a malfunctioning implementation
of the macro _WORDREGISTER in your library version.
Perhaps you could just try it with a current header file?

I pass it on to Anitha for a final (and independent from my
opinion) decision.

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