NIOS Custom Instruction on Floating-Point Arithmetic
Xuemei Cai · Modern Electronics Technique · 2011
To improve the efficiency of floating-point arithmetic on NIOS system,a module of using Verilog to implement single-precision floating-point addition,subtraction and multiplication is proposed,and its function in Quartus is verified through waveform simulation.According to the custom instruction feature of NIOS ii,adding this module to SOPC Builder,expanding a new hardware-based floating-point arithmetic instruction,which can be applied in NIOS IDE.Comparing the output and calculating time between NIOS ii software arithmetic and the new hardware floating-point instructions,the superiority of the hardware instruction computation is verified,and a more efficient choice is provided for NIOS in floating-point arithmetic.