Converting (.m) code to HDL Code - Matlab error for Sine, Cosinse function

Hello,

I'm converting Matlab file(.m) to fixed-point and then to HDL code. the fixed-point file is working 100% , but I got the following errors when I tried to convert the fixed-point to VHDL code because I wrote the following commands at my .m file, Can you please help me to find the replacement of these orders

* _ .m file orders _ _ *_

Y= Sin(x);

Y= Cos (x);

Power(a,b);

round (a,b);

Y=abs(x);

• _ VHDL errors _ *

file_fixpt:1163 Error 'pow' : Call to 'pow' is not supported for HDL code generation.

file_fixpt:1523 Error 'round' : Call to 'round' is not supported for HDL code generation.

file_fixpt:1669 Error 'cos' : Call to 'cos' is not supported for HDL code generation.

file_fixpt:1669 Error 'sin' : Call to 'sin' is not supported for HDL code generation.

file_fixpt:1201 Error 'abs' : Call to 'abs' is not supported for HDL code generation.