eliminate concurrent statement

[Aji]

Hi,

I would like to do something like :

if a < b then c <= '1'; else c <= '0'; end fi;

where a and b are SIGNED vectors and c is std_logic.

I get the warning "Illegal concurrent statement" because it is not embedded
inside a process block.

I don't really need the if then else structure to implement what I want.
Basically, I just want the bit corresponding to the sign of a-b to be
connected to c. How can I do this without the if then else statement so that
I don't get the "Illegal concurrent statement" warning.

Thanks.

PS : I am a beginner.

 

[charles.elias]

Hi,

I would like to do something like :

if a < b then c <= '1'; else c <= '0'; end fi;

where a and b are SIGNED vectors and c is std_logic.

I get the warning "Illegal concurrent statement" because it is not embedded
inside a process block.

I don't really need the if then else structure to implement what I want.
Basically, I just want the bit corresponding to the sign of a-b to be
connected to c. How can I do this without the if then else statement so that
I don't get the "Illegal concurrent statement" warning.

Thanks.

PS : I am a beginner.

c <= '1' when a < b else '0';

 

[Aji]

c <= '1' when a < b else '0';

Thank you Charles, I'll try this.

Aji