Handling Precise Exceptions in Tomasulo

Question

How are precise exceptions handled in Tomasulo's algorithm? I know one way is with the use of re-ordered buffer(ROB). I want to know what are other ways to handle precise exceptions in Tomasulo's algorithm.

Answer 1

The original Tomasulo algorithm does not implement precise exceptions.

Support for precise exceptions was added afterwards. In short, you need a reordering for the writeback stages. See

• Patt, Hwu, Shebanow, HPS, a new microarchitecture: rationale and introduction, MICRO 1985
• Patt et al., Critical issues regarding HPS, a high performance microarchitecture, MICRO 1985