CompuServe Messages

Michelle, The primary reason for PostFix notation is to do the actual evaluation. Most assemblers and interpreters use postfix format for the actual evaluation. First values are move into registers or pseudo registers, then the operations are done. For example, the standard way to do (a+b)*c in 68000 assembler would be move.l a,d0 move.l b,d1 add.l d1,d0 move.l c,d1 muls.l d1,d0 or in 80287 assembler, fld a fld b fadd fld c fmul >> Gary <<