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Definition: Aries

Translation software from HP that runs on Itanium computers. It allows PA-RISC applications originally written for HP 9000 computers to run natively on Itanium computers running HP's Unix (HP-UX) operating system. Aries provides a way to run legacy applications "as is" before they can be recompiled into native Itanium programs.

Aries interprets PA-RISC instructions one at a time until it finds a code block that is executed a certain number of times. It then converts that code block into native IA-64 instructions and executes the native block the next time it is required. When the program is closed, the IA-64 code is discarded. See Itanium.