From: "McKown, John" <[email protected]> Sent: Tuesday, 7 September 2010 10:46 PM
OK, a bit of a brain freeze on my part. Are you saying that the results, in general, of an ADD vs. an ADD Logical (such as AR vs. ALR) will result in a different result in the value (bit pattern) stored in the result operand? Or are you just talking about the ALSI instruction? I did a fast test (below) and the two instructions resulted in the same answer.
That's right. AR is a signed add; ALR is for unsigned addition, and can be used for multiple-precision arithmetic. (The CC tells you whether there is a carry out or not.)
