| NIOS浮点运算定制指令的实现 |
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| 引用本文： | 陈鹏,蔡雪梅. NIOS浮点运算定制指令的实现[J]. 现代电子技术, 2011, 34(10): 166-168 |
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| 作者姓名： | 陈鹏 蔡雪梅 |
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| 作者单位： | 重庆邮电大学,四川重庆,400065 |
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| 摘 要： | 为提高NIOS系统的浮点计算效率，使用Verilog语言实现了单精度浮点数加减及乘法运算的功能模块，并通过波形验证其功能，依据NIOSⅡ定制指令的制定规范，将这一功能添加到SOPCBuilder中，扩展出新的基于硬件电路的浮点运算指令，使之在NIOS软件环境中得到应用。通过NIOSⅡ本身软件浮点计算和新增硬件指令进行运算结果和时间上的对比，证实硬件指令计算的优越性，为NIOS下的浮点运算提供了更有效率的选择。
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| 关 键 词： | Verilog 浮点运算 FPGA NIOS定制指令 |
NIOS Custom Instruction on Floating-Point Arithmetic |
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| CHEN Peng,CAI Xue-mei. NIOS Custom Instruction on Floating-Point Arithmetic[J]. Modern Electronic Technique, 2011, 34(10): 166-168 |
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| Authors: | CHEN Peng CAI Xue-mei |
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| Affiliation: | CHEN Peng,CAI Xue-mei(Chongqing University of Post and Telecommunication,Chongqing 400065,China) |
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| Abstract: | 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 s... |
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| Keywords: | Verilog floating-point arithmetic FPGA NIOS custom instruction |
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