GCC for xscale big-endian gives error: register specified for '__r1' isn't suitable for data type

[Khem Raj <kraj@xxxxxxxxxx>]

Hi

When compiling the following example with gcc with xscale big endian I 
am getting following error.

test.c: In function `foo':
test.c:6: error: register specified for '__r1' isn't suitable for data type
test.c:6: error: register name given for non-register variable '__r1'



typedef unsigned long long u64;
int foo(unsigned long arg)
{
 u64 ullval = 0;
 const register typeof(*((u64 *)arg)) __r1 asm("r1") = (ullval << 9);
 return 0;
}



But the same example compiles fine with xscale little endian gcc.

However if I use r0 instead of r1 then the program compiles fine on both 
big and little endian.

Why is error happening and what is the right way to code the above

Thanks for your help

-Khem