Patent ID: 9280328
Filing Date: 2016-03-08
CPC Classification: G06F

Claim Text:
1. A computer implemented method of optimizing a binary code in a language having access to a binary coded decimal (hereinafter referred to as BCD) variable by converting a BCD operation to a decimal floating point (hereinafter referred to as DFP) operation, the method comprising: generating a first compiler expression of the binary code; analyzing a use-definition chain and/or a definition-use chain for the first compiler expression; generating a second compiler expression by identifying logical BCD variables in the first compiler expression based on a result of the analysis; assigning temporary variables to the identified logical BCD variables, wherein the second compiler expression includes packed decimal operations and the assigned temporary variables; and converting at least one of the packed decimal operations in the second compiler expression and at least one of the assigned temporary variables to the DFP operation if sign information and precision information are not lost by the conversion from the BCD operation to the DFP operation, wherein identifying logical BCD variables in the first compiler expression based the result of the analysis includes, in the use-definition and/or definition-use chains of operands in the first compiler expression, regarding an operand of definition (def) and an operand of use (use) as the same logical BCD variables, wherein regarding the operands as the same logical BCD variables further comprises: