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Forum Topic - FPU Assembly Instructions: (2 Items)

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Vadim Malenboim

12/30/2008 7:44 AM

post19282

I'm using ppc405 core on virtex4 fpga that uses apu to implement hardware fp.

I'm running the procnto-400 microkernel.

when i try to use the lfs assebmly insruction  (load float single) a call to emu_init from femu is done.

how can i configure the kernel not to call the femu procedures when floating point instructions are called ?

Vadim Malenboim

12/30/2008 9:36 AM

post19284

Re: FPU Assembly Instructions

Another more precise question :
What does the procnto400 kernel does when he catches floating point exception from the cpu ?

Does it try to load the fpemu library and the _math_emulator.

When debugging the assembly step by step after the lfs command it jumps to _math_emulator .

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