Method for handling complex instructions in an out-of-order proc

Details Method for handling complex instructions in an out-of-order proc Method for handling complex instructions in an out-of-order proc

1997-06-25

1999-02-23

Treat, William M.

G06F 930

Patent

active

058753168

ABSTRACT:
In a processor that executes complex instructions which are expanded into microinstructions prior to execution, non-complex instruction execution is optimized by providing a by-passable helper logic for expanding complex instructions into microinstructions. Control logic parses a bundle of instructions into sub-bundles of non-complex instructions and sub-bundles of microinstructions. The control logic detects when a complex instruction is present in a bundle of instructions and directs the complex instruction to the helper logic for expansion into two or more microinstructions. Each non-complex instruction bypasses the helper logic, thereby improving the execution performance of the non-complex instruction.

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