Merging status and control data in a reservation station

A reservation station disposed in an integrated circuit, the reservation station comprising:

• source selection logic configured to select, using an instruction tag corresponding to an instruction, first control data from a first source bus and second control data from a second source bus different from the first source bus;
• and
• source merge logic configured to:
• receive classification data indicating a type of the instruction;
• map the classification data to a bit position of relevant data in the first control data and to a bit position of relevant data in the second control data;
• generate, using the mapped classification data, respective bit masks for identifying relevant control data in the first control data and the second control data,
• wherein the relevant control data is used for processing the instruction by an execution unit,
• merge, using the respective bit masks, the relevant control data from the first and second control data into merged control data, and
• upon determining the instruction is ready to issue, provide the merged control data to the execution unit for processing the instruction.

A method of operating a reservation station in a processor, the method comprising:

• selecting, using an instruction tag corresponding to an instruction, first control data from a first source bus and second control data from a second source bus different from the first source bus;
• receiving classification data indicating a type of the instruction;
• mapping the classification data to a bit position of relevant data in the first control data and to a bit position of relevant data in the second control data;
• generating, using the mapped classification data, respective bit masks for identifying relevant control data in the first control data and the second control data, wherein the relevant control data is used for processing the instruction by an execution unit;
• merging, using the respective bit masks, the relevant control data from the first and second control data into merged control data;
• and
• upon determining the instruction is ready to issue, providing the merged control data to the execution unit for processing the instruction.