Technologies for prediction-based register renaming

A method for executing instructions comprising:

• determining a data type prediction for a result of a first instruction that will be mapped to a first logical register;
• based on the data type prediction matching a first data type, renaming the first logical register to be mapped to a physical register of a first cluster chosen from among a plurality of clusters, wherein the plurality of clusters includes:
• the first cluster, which includes a first set of physical registers and a first execution resource circuit configured to perform operations that take contents of one or more registers of the first set of physical registers as first inputs, wherein the first inputs for operations of the first execution resource circuit are of the first data type;
• and
• a second cluster, which includes a second set of physical registers and a second execution resource circuit configured to perform operations that take contents of one or more registers of the second set of physical registers as second inputs, wherein the second inputs for operations of the second execution resource circuit are of a second data type that is different than the first data type;
• detecting a misprediction where a second instruction, to be executed after the first instruction, will access the first logical register as an input of the second data type;
• and
• responsive to the misprediction, issuing a micro-operation (micro-op) before the second instruction, wherein the micro-op copies a value of the first logical register mapped to a first physical register of the first set of physical registers to a second physical register of the second set of physical registers.