Arrangement of detecting branch error in a digital data processi

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364938, 3642613, G06F 932

Patent

active

054993512

ABSTRACT:
A signal which requires an interruption of execution of program instructions stored in a memory, is produced. The program instructions include an entry point instruction at an entry point to which a branch instruction transfers control. An instruction decoder is operatively coupled to the memory and receives the program instructions in sequence. A preceding branch instruction is coupled to the decoder and is arranged to store a signal which is applied from the decoder and which indicates whether or not the program instruction decoded by the decoder is a branch instruction. The instruction decoder further receives the signal from the indicator. The instruction decoder produces the first mentioned signal when receiving the entry point instruction which indicates that control has been transferred to a new program flow, if the signal indicates that the program instruction decoded by the decoder is not a branch instruction.

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patent: 4777594 (1988-10-01), Jones et al.
patent: 4920538 (1990-04-01), Chan
patent: 5008807 (1991-04-01), Krueger
patent: 5014276 (1991-05-01), Bush
patent: 5155843 (1992-10-01), Stamm
patent: 5261071 (1993-11-01), Lyon

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