Can anybody explain the code generated for this function?
#include <io.h>
unsigned two;
void foo(void)
{
two = P6IN + P6IN;
}
21 foo:
26 0000 5F42 3400 mov.b &0x0034, r15
27 0004 4E4F mov.b r15, r14
28 0006 5F42 3400 mov.b &0x0034, r15
29 000a 7FF3 and.b #-1,r15
30 000c 0E5F add r15, r14
31 000e 824E 0000 mov r14, &two
32 0012 3041 ret
Why the extra mov.b?
Why the and.b?
Why isn't this correct?
mov.b &0x0034, r15
mov.b &0x0034, r14
add r15, r14
mov r14, &two
ret
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