REGISTER ASSIGNMENT METHOD AND REGISTER-FILE-PORT ACCESS DEVICE

摘要

PURPOSE: To reduce the amount of save and restore of a register at the time of a procedure call/return. CONSTITUTION: Only registers of a truly required number of registers assigned from a register pool for each procedure by improving the register window system. This assignment is made by a called procedure itself independently of a caller procedure. When the registers in the register pool are used out, part of contents of the registers assigned already is saved in a memory to make an idle register.