ROUNDING-OFF IN ACCORDANCE WITH INSTRUCTIONS Russian patent published in 2011 - IPC G06F7/499 

FIELD: information technology.

SUBSTANCE: method of rounding-off comprises the following steps: the user level rounding-off instruction of the instruction set architecture (ISA) is received in a processor control selector module, where said instruction has a format which includes a source operand, a destination operand and a directly obtained value; it is determined whether the mode change indicator for rounding-off the directly obtained value meant for indicating change of the default rounding-off mode is active by decoding the directly obtained value in the processor control selector module; if so, the field for the mode for rounding-off the directly obtained value is obtained; the field of the rounding-off mode is separate from the change indicator and sends the source operand and rounding-off mode control information to the floating point module of the processor connected to the control selector module; and rounding-off is performed on the source operand in the floating point module of the processor which is responsible for the instruction for rounding-off the user level, and in accordance with control information.

EFFECT: high efficiency of processors.

20 cl, 5 dwg, 6 tbl