Abstract: A data processing apparatus includes processing circuitry for performing a convert-to-integer operation for converting a floating-point value to a rounded two's complement integer value. The convert-to-integer operation uses round-to-nearest, ties away from zero, rounding (RNA rounding). The operation is performed by generating an intermediate value based on the floating-point value, adding a rounding value to the intermediate value to generate a sum value, and outputting the integer-valued bits of the sum value as the rounded two's complement integer value. If the floating-point value is negative, then the intermediate value is generated by inverting the bits without adding a bit value of 1 to a least significant bit of the inverted value.

Abstract: Processing circuitry is provided to perform an operation FRINT for rounding a floating-point value to an integral floating-point value. Control circuitry controls the processing circuitry to perform the FRINT operation in response to an FRINT instruction. The processing circuitry includes shifting circuitry for generating a rounding value by shifting a base value, adding circuitry for adding the rounding value to the significand of the floating-point value to generate a sum value, mask generating circuitry for generating a mask for clearing fractional-valued bits of the sum value, and masking circuitry for applying the mask to the sum value to generate the integral floating-point value.

Abstract: The present invention provides an apparatus and method for performing an operation on an operand or operands in order to generate a result, in which the operation is implemented by iterative execution of a recurrence equation. In each iteration, execution of the recurrence equation causes a predetermined number of bits of the result and a residual to be generated, the residual generated in a previous iteration being used as an input for the current iteration, and in the first iteration the residual comprising the operand.

Abstract: The present invention provides an apparatus and method for performing an operation on an operand or operands in order to generate a result, in which the operation is implemented by iterative execution of a recurrence equation. In each iteration, execution of the recurrence equation causes a predetermined number of bits of the result and a residual to be generated, the residual generated in a previous iteration being used as an input for the current iteration, and in the first iteration the residual comprising the operand.