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Altera_Forum
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15 years ago

NIOS2 HW & DIV Instructions + FPU

Hello i am in charge of designing a system that does a lot of complex sin/cos/* instructions and i need them to be fast. I am using NIOS2-F at 100mhz in a Cyclone IV. I've enabled HW and DIV ...
Altera_Forum's avatar
Altera_Forum
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15 years ago

Changing the version of gcc won't make much difference.

It might be worth looking at the generated code (either pass '-S -fverbose_asm' to gcc and look at the generated .s file, or run 'objdump -d' on the object/program file).

Also remember that (IIRC) the FP opcodes only do 'float' not 'double', and you don't want to be converting between float and double either.