Implementation of multi-precision floating point divider for high speed signal processing applications

摘要

The introduction of fused multiplier and add technique enhances design metrics of floating point (FP) arithmetic operations. Particularly Newton-Raphson (NR) based division algorithm is popular choice to SRT division algorithms. This paper proposes 32-bit FP division using NR computational division technique with pipelining method capable of doing high speed signal processing operations. The proposed divider used as IP core and make it as optimal choice to speed up FP operations. It improves rounding accuracy in addition with reduction in area overhead. The NR computational calculations are implemented by iteratively using 32-bit FP multiplier and adder. The key module used for calculating significand (mantissa) part is 24-bit Wallace tree multiplier using carry save adders. The Wallace multiplier provides higher computational speed, hence, is effectively utilized as a part of FP divider. The proposed pipelined FP divider is fully combinational circuit with clock and data gating applied to reduce the dynamic power consumption, delay and area overhead designed for signal processing applications. It also improves the accuracy of the result. The operands are represented and operated using IEEE 754 standard. The operation and results are validated through simulation using VIVADO software and implemented on Xilinx-7 series, ARTIX field programmable gate array.