Besides doing an xor, is there a better way to get the compl

[Brian]

To date, I usually do this (reg being an 8 bit register):

----------------------------------------------------
reg_compliment[7:0] <= reg_in[7:0] ^ 255;
----------------------------------------------------

I figured that this shou have worked:

----------------------------------------------------
reg_compliment[7:0] <= !reg_in[7:0] ;
----------------------------------------------------

However, my compiler doesn't like it. I'm using Altera's internal
Quartus verilog compiler.

 

[Brian]

Fond it, never mind. it was the ~ .


Brian wrote:

To date, I usually do this (reg being an 8 bit register):

----------------------------------------------------
reg_compliment[7:0] <= reg_in[7:0] ^ 255;
----------------------------------------------------

I figured that this shou have worked:

----------------------------------------------------
reg_compliment[7:0] <= !reg_in[7:0] ;
----------------------------------------------------

However, my compiler doesn't like it. I'm using Altera's internal
Quartus verilog compiler.

 

[Brian]

Fond it, never mind. it was the ~ .


Brian wrote:

To date, I usually do this (reg being an 8 bit register):

----------------------------------------------------
reg_compliment[7:0] <= reg_in[7:0] ^ 255;
----------------------------------------------------

I figured that this shou have worked:

----------------------------------------------------
reg_compliment[7:0] <= !reg_in[7:0] ;
----------------------------------------------------

However, my compiler doesn't like it. I'm using Altera's internal
Quartus verilog compiler.