GCC inline ASM question

[Rich Fife <rfife@xxxxxxxx>]

Is it possible to have GCC give assign you a register for use without
declaring it an input or output register?  I need a temp register to
store intermediate values and I'm hard coding it to eax like so:

            __asm__(

...

                // We have to specifically ask for ecx since shl can
only use cl.
            : "=c" (member) : "r" (check_point) : "%eax" );

I'd like to replace the final "%eax" with "r" and use %2 to access it,
but that doesn't work.

Thanks in advance!

   -- Rich --