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lidaxjtu
Explorer
Explorer
8,223 Views
Registered: ‎01-02-2008

how about the fpu of microblaze?

1. how about the fpu , to execute fp operations ,comparing with other ip core,,FPO(floating point operator), or FFT core?
performance, and speed..
2. where to get the  api or lib userguide, for c operation functions and math functions; many c functions  are not suitable for float,, double type , such as xil_printf .


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goran
Xilinx Employee
Xilinx Employee
8,201 Views
Registered: ‎08-06-2007

1. It's hard to compare these modules since they are used differently. FFT core is a specific module for just FFT operation, FPO is designed for parallell pipelined operations in the fabric, MicroBlaze FPU is used for executing floating-point instruction in MicroBlaze.
   MicroBlaze FPU was optimized for a normal execution flow inside MicroBlaze and also for area.
2. You can find most information on how to use floating-point functions in a standard C book.
    All C functions will be implemented in MicroBlaze, double-precision will always be handled in software, single-precision will be handled by the FPU if it's implemented.
    MicroBlaze FPU supports addition,subtract,division,multiplication,compare.
    When FPU extended is enabled these operations are also implemented in FPU,  square-root, float-to-int,int-to-float
 
Göran
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