Thomas Koeller <thomas.koeller@xxxxxxxxxxxxx> writes: > Since the meaning of 'accum' used to be 'hi' and 'lo', all its uses > were clearly redundant. For the record, that isn't quite true. GCC internally treated "accum" as an entirely separate register (which is why it became such a headache). In theory, if you have an instruction that clobbers lo and hi, but doesn't clobber "accum", gcc might think that a value in "accum" will still be valid. Richard
