topic Re: Float and Double on K65 in Kinetis Microcontrollers https://community.nxp.com/t5/Kinetis-Microcontrollers/Float-and-Double-on-K65/m-p/468973#M28334 <HTML><HEAD></HEAD><BODY><P>Hi, Goran,</P><P>As you know that the K65 with FPU module can only do single precision float operation with hardware, and the DSP instructions in the Cortex-M4 only support integer or fixed point(fractional data) operation. Both the FPU and DSP instruction do not help to operate the double float operation.</P><P>Fortunately, the C compilers support double float operation by software simulation, but it takes a long time.</P><P>Hope it can help you.</P><P>BR</P><P>Xiangjun rong</P></BODY></HTML> Fri, 11 Mar 2016 04:32:34 GMT xiangjun_rong 2016-03-11T04:32:34Z Float and Double on K65 https://community.nxp.com/t5/Kinetis-Microcontrollers/Float-and-Double-on-K65/m-p/468972#M28333 <HTML><HEAD></HEAD><BODY><P>I am using K65 in life science project. My customer insist to use double. </P><P>The built in single precision FPU + DSP will help or not?</P><P>Also, what is the impact on the processing speed?</P><P>Thank you,</P></BODY></HTML> Thu, 10 Mar 2016 19:41:54 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/Float-and-Double-on-K65/m-p/468972#M28333 goranigic 2016-03-10T19:41:54Z Re: Float and Double on K65 https://community.nxp.com/t5/Kinetis-Microcontrollers/Float-and-Double-on-K65/m-p/468973#M28334 <HTML><HEAD></HEAD><BODY><P>Hi, Goran,</P><P>As you know that the K65 with FPU module can only do single precision float operation with hardware, and the DSP instructions in the Cortex-M4 only support integer or fixed point(fractional data) operation. Both the FPU and DSP instruction do not help to operate the double float operation.</P><P>Fortunately, the C compilers support double float operation by software simulation, but it takes a long time.</P><P>Hope it can help you.</P><P>BR</P><P>Xiangjun rong</P></BODY></HTML> Fri, 11 Mar 2016 04:32:34 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/Float-and-Double-on-K65/m-p/468973#M28334 xiangjun_rong 2016-03-11T04:32:34Z