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8 Bit Adder Verilog

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60 Threads found on edaboard.com: 8 Bit Adder Verilog
module rippl( input a, input b, input cin, output s, output cout ); wire temp; assign temp=cin; genvar i; always @(*) for(i=0;i<64;i=i+1) begin s<=(a^(b^temp)); temp<=(((a&b)|(b&temp))|(temp&a)); end assign cout=temp; end
If you wrote an 8 bit addition, then thats what you'll get the summary for. You will have to modify the code to see the utilisation for 1bit, 2bit etc.
Hi. I need to construct an 8-bit accumulator. For this, I need an 8-bit adder. But my ASIC vendor?s technology library has only 4-bit adders. So I construct the accumulator. When I synthesized the circuit, I found that there was a max-delay violation on the ?Carry? signal between the two (...)
I am designing a * bit adder/subtractor..code is given below, somehow m not getting the correct output and m not able to find out the problem. Can anyone look into the code and suggest corrections? module fa_1 (cin,a,b,sum,carry); input cin,a,b; output sum,carry; assign sum = a^b^cin; assign carry = (a&b)|(b&cin)|
Due to my previous post got deleted somehow, this is my second post. Hello, First of all, I have a project that can do; 111835 It accomplishes all of this perfectly. However, now I need to edit my program in a way that it multiplies 2 numbers instead of add them (I will take out add function and replace it w
i am murali , i need an verilog code for 4 bit serial in parallel out shift register, 4 bit dual port distribted ram, 4 bit pipeline adder tree and 4 bit pipeline shift-add tree.
i am murali , i need an verilog code for 4 bit serial in parallel out shift register, 4 bit dual port distribted ram, 4 bit pipeline adder tree and 4 bit pipeline shift-add tree.
Hi everyone, I have a question when I want to simulate a simple adder by cadence virtuoso. I've designed a 64-bit adder and would like to make a simulation. But it seems too boring when I do so because there are almost 200 pins. That is to say if I just use vpulse (NCSU_Analog_Parts -> Voltage_Sources -> vpulse) in this process, I need (...)
Hi, I have written a simple verilog code for N-stage of 4-bit adder like this, Z = A +B+C+D+E....... Now I need elaborate the design, don't know what type of adder is? Can any tell me what type of adder come out from Synopsys Design Compiler.
module ha(sum,c_out,x,y); //half adder input x,y; output sum,c_out; assign {c_out,sum}=x+y; endmodule // ha module fa(sum,c_out,c_in,x,y); //full adder input x,y,c_in; output sum,c_out; assign {c_out,sum}=x+y+c_in; endmodule module partial(x,z,r0,r1,r2,r3,md,mr); input x,z; input mr,
103096 Find the attached block diagram of the simple 2, four-bit manchester adders. It can be generalized as below. Boolean Equations: 1) Gi = Ai and Bi 2) Pi = Ai xorBi 3) Si = Pi xor Ci 4) Ci+1 = Gi or (Pi and Ci )
I am new to this forum as well as to verilog!! I wrote a code for the multiplication of two 8 bit numbers using shift operator and adder ..... i have completed my code but while simulating,I am getting two error and to rectify these errors,I need your help (expert advice) :grin: this is my code: 1. there are two modules, first one is (...)
I am trying to build a ripple carry adder using a hierarchical verilog structure description. What I have is not working right... out puts are all messed up. My logic is messed up somewhere but not sure where. I grabbed the test bench from a 8 bit multiplier to use for the RCA and so I know I am overlooking something basic... any help (...)
I need to make a 6 bit full adder using verilog(Xilinx).And I need to use a 4 bit adder and two 1 bit adders. Can you guys please help me? This is how I start: module adder6( output sum, input a, b); All you need is to cascade them. If (...)
module test; parameter n = 8; reg a,b,cin; wire sum1,sum2; wire cout1,cout2; adder1 #(n) inst1(a,b,cin,cout1,sum1); adder2 #(n) inst1(a,b,cin,cout2,sum2); initial begin a= ; // give different values of a and b in this way b= ; #100 a = ; b= ; #200(time delay) . . . end endmodule - - - Updated - - - refer
90236 I am trying to implement a sequential shift and add 4bit multiplier as shown in the image. I am having a separate module for the 4 bit ripple carry adder. I have tested the adder module and it works fine. now i need to trigger it from the multiplier module. so that it triggers on the 'add' signal. please help
Can anyone plz help me out in creating fsm for 4-bit parallel adder/subtractor circuit..88776
Hi guys, Can anyone please help me to design the following circuit let's say that there's an array of 4 bits (the width of this array should be parameterizable) I need to find the index of the first occurrence of a '1' in this array when searched from the least significant bit So if array is 0100 module should return index 2 if array is 110
Hello everyone. I want to take one cell (with a schematic view) from my library and place it N times in a row in series. For example that could be a N-bit adder which is composed by 1bit cells. Can I do that in verilog-a using a for loop or something similar? Is there any other way? I repeat that the original cell has (...)
hi anyone correct this below verilog coding,it is 4 bit carrt select adder which contains 3 module ripple carry adder binary excess one conveter mux(6:3) i had error in last part which calling the modules module fulladder(a, b, c_in, sum, c_out); input a; input b; input c_in; output (...)
put fa module in the same file fa4 module is thanks,but i want to know whether we can call the modules from different directory or not instead of copying them on to the program and also can we create global modules so that we can call them if so please explain it with an example....thanks in advacnce :???:
need verilog code for the above ripple carry adder urgent please
Need a verilog structural code for Extend the four-bit ripple carry adder to 16 bits using four of the four bit adders
i am writing a code for a circuit where the input to the 16 bit carry look ahead adder is output of the d flipflop and input to the flipflop is output of the adder its like a loop when i am writing the code i am un
hello can anyone help me with the verilog code for a 16 bit carrylook ahead adder using CLA-4 units? i have to submit it by next week and the code i have written seems to show too many errors...
68158 please give me codes for thi circuit
hi guys any body please give me the verilog code for 32 bit carry skip adder and 32 bit carry select adder ......its urgent
What do you mean by ISCAS89 format? .blif format?
I'm just a newbie in verilog so please be patient :smile: Ok, here is my problem. I'm trying to write an 8 bit adder code from the exercise 2 of the chapter 3 of the book verilog Quickstart (James M. Lee) 2nd Edition. My code is below: // TEST MODULE // module test_adder; reg a, b; reg (...)
Using Libero's SmartGen tool, today I created a 16-bit Brent-Kung adder/subtractor. I pasted the resulting verilog code into an ALU module and ran a few (10) tests against it. It ran fine. And the result was a LOT smaller than the one synthesized from pure behavioral verilog. :-) But when I synthesized it with Synplify, th
Plz tell me the code of 4 bit adder using data flow modleing in verilog..
hi there, the following is the code using generate,endgenerate to achieve an n bit adder. For now, the code sets n=4 thus having a 4 bit adder. The code is working fine. As you can see in the code, there is no timescale used, I would like each sample to be 100ns long in the waveform viewer. I added the modifications (in (...)
Cau anybody give me site where verilog code for 4 bit BCD adder/subtractor is available
Can Any body send me verilog Code for adder Some details here
Hi everyone, can anyone help to find a verilog module for 4 bit serial adder? the following chart is It is part of my project please help me
I have designed a 64 bit prefix adder . How do I calculate the switching power of the circuit by doing modifications in my verilog code Plz reply
Hi Guys, PLEASE HELP I am designing a 32 bit ripple carry adder using UMC 90 nm design kit. Please tell me how do i insert pads in my design what files i need to use. I am using Cadence Soc encounter thanks in advance.
dear friend when you define 8 bit adder you need to define carries of intermediate stages as wire ... you cant put same ci as input to all 8 bit adder.. define wire c1,c2,c3,c4,c5,c6,c7 and replace module instance like this.... Added after 1 minutes: add_1bit t0 ( r, c1, x, y, ci ) ; add_
Hi everyone! I'm a basic (extremely basic!) vhdl programmer and I have to implement a 64 bit DFTL (Dynamic Feedthrough Logic addet)adder code in an FPGA (Spartan 3) with verilog or VHDL. Is there some one who has some good example code for a DFTL adder? Thank you a lot for you answer
hello, I alreadly made a BCD adder , but how can I made a 4 bit decimal adder and a subtraction by using verilog ? Thx a lot.
hey everyone, VLSI newbie here, I need verilog code for 32 bit carry skip adder, I would really appreciate it
Any1 can write for me verilog code for 64 bits hybrid prefix adder...32 bit prefix adder alredi implement by brent n kung..i have to implement for 64 bits hybrid prefix adder..plz help me!!
Hi All, I am in need of a verilog code for multiplier or adder with latch function. (Neglect bit number and type.) If any one of you has the code, please upload it.
I wish to design a 32 bit adder. So result at the max can be 33 bits. But my output is 32 bits. Hence I should conditionally shift by one bit if the carry is set when 32nd bit is added. How can this be implemented in verilog for RTL?
In fact, I have the code write 5,6 years ago by myself, I don't advocate one to get code from this way, if you understand the method of carry save, it's very simple. but I still offer to you this time module RCA4(A,B,Ci,So,Co); input A,B; input Ci; output So; output Co; wire c1,c2,c3,c4; wire g0,g1,g2,g3; wire
This is code is for an simple asynchronous wrapping n-bit adder. By changing the value of n you can make it a 2, 4, … bit adder where n = bits> - 1. f is the output register that will have the current value of the counter, cOut is the carry output. a & b are the number inputs and cIn is (...)
Hi everybody! I have the following code that works as a shift register : module sreg (C, SI, SO); input C,SI; output SO; reg tmp; always @(posedge C) begin tmp = tmp << 1; tmp = SI; end assign SO = tmp; endmodule And I want to create multiple instances of the sreg module which are interconnected with e
Here's a verilog inference example. The synthesis tool recognizes (infers) the 8-bit up-counter with synchronous clear, and generates an appropriate register with adder logic. module top (clk, clear, count); input clk, clear; output reg count=0; always @ (posedge clk) count <= clear ? 0 : count + 1; endmod
Hi all, I want to test my floating point adder in verilog. For this I need to generate bit vector from "real". The is function "$realtobits" but this creates 64 bit vector from real. My fp adder is single precision so I need 32 bit vector. May be someone knows how to (...)
Hello... i Need verilog Code of 4 bit Conditional Sum adder....Using Behaviourial Modeling... Plz Tell me as soon as Possible