US 7,610,476 B1 · Multiple control sequences per row of microcode ROM

Abstract

Various embodiments of methods and systems for storing multiple groups of microcode operations and corresponding control sequences per row of microcode ROM are disclosed. In one embodiment, an integrated circuit may include a microcode ROM coupled to a control sequence logic unit. The microcode ROM may store multiple groups of microcode operations per row. For each group of microcode operations stored in a row, a corresponding control sequence may also be stored in the row. Each group of microcode operations may be included in a microcode routine. The groups of microcode operations stored in a row may be included in the same microcode routine, or some of the groups may be included in different microcode routines.

Claims27

Dependent claims

A microprocessor, comprising:

a microcode ROM, wherein a row in the microcode ROM stores a plurality of groups of microcode operations, wherein a group of the plurality of groups of microcode operations is comprised in a microcode routine, and wherein the row stores an associated control sequence for each of the plurality of groups of microcode operations;
and
a control sequence logic unit coupled to the microcode ROM, wherein in response to accessing the group of microcode operations comprised in the microcode routine, the control sequence logic unit is configured to use the control sequence associated with the group of microcode operations to identify an other row storing one or more next groups of microcode operations comprised in the microcode routine.

Dependencies are inferred from the claim text.

Multiple control sequences per row of microcode ROM

Life of this patent

Multiple control sequences per row of microcode ROM

Life of this patent

Abstract

Claims27