Floating-Point calculation in nios

hi, thanks for your reply.

in the " Using NiosII Floating-Point Custom Instructions Tutorial.pdf", there is a table

https://www.alteraforum.com/forum/attachment.php?attachmentid=10598

the table shows that the nios can do lots of math, including exp log sin ...

how these math can be done in nois?

i find in the math.h :

# ifndef _REENT_ONLY

# ifndef __math_68881

extern double acos _PARAMS((double));

extern double asin _PARAMS((double));

extern double atan2 _PARAMS((double, double));

extern double cosh _PARAMS((double));

extern double sinh _PARAMS((double));

extern double exp _PARAMS((double));

extern double ldexp _PARAMS((double, int));

extern double log _PARAMS((double));

extern double log10 _PARAMS((double));

extern double pow _PARAMS((double, double));

extern double sqrt _PARAMS((double));

extern double fmod _PARAMS((double, double));

but i did not find the definition of these functions.