Decimal floating-point instruction in a round-for-reround mode

A computer system for facilitating processing within a computing environment, the computer system comprising:

• a memory;
• and
• one or more computer processors in communication with the memory, the one or more computer processors being part of a machine that includes one or more floating point registers, and wherein the computer system is configured to perform a method, said method comprising:
• executing a decimal floating-point instruction in a round-for-reround mode, wherein the decimal floating-point instruction is configured to perform a decimal floating-point operation on a decimal floating-point operand, the executing the decimal floating-point instruction comprising:
• forming based on performing the decimal floating-point operation, an intermediate result having a high order portion and a low order portion, the high order portion having a least significant digit;
• creating from the intermediate result a rounded-for-reround number, the rounded-for-reround number comprising the high order portion of the intermediate result, and wherein based on the least significant digit of the high order portion being a selected value and based on the low order portion having another selected value, incrementing the least significant digit of the rounded-for-reround number;
• and
• storing in a selected location the rounded-for-reround number.

A computer program product for facilitating processing within a computing environment, said computer program product comprising:

• one or more computer readable storage media and program instructions collectively stored on the one or more computer readable storage media readable by at least one processing circuit to:
• execute, by a computer processor, a decimal floating-point instruction in a round-for-reround mode, wherein the computer processor is part of a machine that includes one or more floating point registers and the decimal floating-point instruction is configured to perform a decimal floating-point operation on a decimal floating-point operand, and wherein execution of the decimal floating-point instruction comprises:
• forming based on performing the decimal floating-point operation, an intermediate result having a high order portion and a low order portion, the high order portion having a least significant digit;
• creating from the intermediate result a rounded-for-reround number, the rounded-for-reround number comprising the high order portion of the intermediate result, and wherein based on the least significant digit of the high order portion being a selected value and based on the low order portion having another selected value, incrementing the least significant digit of the rounded-for-reround number;
• and
• storing in a selected location the rounded-for-reround number.