inline assembly

Hi,

	When doing inline assembly, is there a way to get the compiler to 
assign "extra" (one not specified for inputs and outputs) registers? In 
the following:

                 __asm__ __volatile__ (
                         "addi 5,%1,-1\n"
                         "andc 5,%1,5\n"
                         "cntlzw 5,5\n"
                         "subfic %0,5,31":
                         "=r"(j):
                         "r"(i)
                 );

Can I get the compiler to choose a register for r5?

kevin