Shift left by negative value

Hello all,

I'm trying to figure out how CCE 2 handles a shift left by a negative value. Something like:

temp = 1 << -1;

K&R C says this is implementation specific. I'm not planning on using this as a hack, but I would like to understand what might happen should this ever happen.

When I disassemble it, it seems to be loading values into registers and then calls a memory location that corresponds to I_LSL according to my .map file.