A pipelined computer processor in a milli-mode architected state tests the validity of a program status word with a mask stored in a millicode general register. The mask indicates bits in the program status word which are to be zeros if the word is valid. A logical AND operation is performed between...http://www.google.fr/patents/US5694587?utm_source=gb-gplus-shareBrevet US5694587 - Specialized millicode instructions for test PSW validity, load with access test, and character translation assist
Specialized millicode instructions for test PSW validity, load with access ...
