History Buffer with Hybrid Entry Support for Multiple-Field Registers

An information handling system comprising:

• one or more processors;
• a memory coupled to at least one of the processors;
• and
• a set of computer program instructions stored in the memory and executed by at least one of the processors in order to perform actions of:
• receiving dispatch information corresponding to an instruction that targets at least one first field in a first register and at least one second field in a second register, wherein the first register is a first register type and the second register is a second register type;
• selecting a history buffer entry from a plurality of history buffer entries included in a history buffer, wherein the selected history buffer entry is adapted to concurrently store content corresponding to the first register type and the second register type;
• and
• storing, in the selected history buffer entry, first content from the first register's targeted first fields and second content from the second register's targeted second fields.

A computer program product stored in a computer readable storage medium, comprising computer program code that, when executed by an information handling system, causes the information handling system to perform actions comprising:

• receiving dispatch information corresponding to an instruction that targets at least one first field in a first register and at least one second field in a second register, wherein the first register is a first register type and the second register is a second register type;
• selecting a history buffer entry from a plurality of history buffer entries included in a history buffer, wherein the selected history buffer entry is adapted to concurrently store content corresponding to the first register type and the second register type;
• and
• storing, in the selected history buffer entry, first content from the first register's targeted first fields and second content from the second register's targeted second fields.