Execution of condition-based instructions

Abstract

Execution of condition-based instructions is facilitated. A condition-based instruction is obtained, as well as a confidence level associated with the instruction. The confidence level is checked, and based on the confidence level being a first value, a predicted operation of the instruction, which is based on a predictor, is unconditionally performed. Further, based on the confidence level being a second value, a specified operation of the instruction, which is based on a determined condition, is conditionally performed.

What is claimed is: 
     
         1 . A method of facilitating execution of an instruction in a computing environment, said method comprising:
 checking a confidence level associated with the instruction;   based on the confidence level being a first value, unconditionally performing a predicted operation of the instruction, the predicted operation based on a predictor associated with the instruction; and   based on the confidence level being a second value, conditionally performing a specified operation of the instruction, the specified operation based on a determined condition.   
     
     
         2 . The method of  claim 1 , wherein the confidence level is one of:
 a part of the predictor; or   another predictor separate from the predictor.   
     
     
         3 . The method of  claim 1 , wherein the predicted operation comprises one of a load operation, suppression of a load operation, or selection of one datum of a plurality of data, and wherein the specified operation comprises one of a load operation, suppression of a load operation, or selection of one datum of a plurality of data. 
     
     
         4 . The method of  claim 1 , wherein the instruction is a load on condition instruction, the determined condition is an input to the instruction, and one or more of the predicted operation and the specified operation is a load operation or a suppression of a load operation. 
     
     
         5 . The method of  claim 1 , wherein the instruction is a data selection instruction, the determined condition is an input to the instruction, and one or more of the predicted operation and the specified operation is a selection of a first datum or a selection of a second datum. 
     
     
         6 . The method of  claim 1 , further comprising:
 based on unconditionally performing the predicted operation, checking an accuracy of predicating the predicted operation; and   continuing processing associated with the instruction based on the checking.   
     
     
         7 . The method of  claim 6 , wherein the continuing processing comprises one of:
 completing the instruction based on the checking indicating an accurate prediction; and   performing recovery based on the checking indicating an inaccurate prediction.   
     
     
         8 . The method of  claim 1 , further comprising updating a prediction data structure, the prediction data structure to include one or more of the confidence level and the predictor. 
     
     
         9 . The method of  claim 1 , wherein based on the confidence level being the second value, obtaining the determined condition, wherein the obtaining comprises obtaining the determined condition from one of a condition code or a register. 
     
     
         10 . The method of  claim 1 , wherein the unconditionally performing the predicted operation comprises:
 generating an implementation to unconditionally perform the predicted operation; and   executing the implementation to unconditionally perform the predicted operation.