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8 Bit Adder Verilog

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1000 Threads found on edaboard.com: 8 Bit Adder Verilog
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?
Plz tell me the code of 4 bit adder using data flow modleing in verilog..
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.
Hi all I designed and implement a 4 bit adder which gets a carrier bit as an input, adds up two 4 bit numbers, and gives a 4 bit number and a carrier bit as outputs in VHDL. What is vhdl code?
Hi, can any1 send me the code for 8-bit adder using eight 1-bit adder in systemC. I have attached the 1-bit full adder code in systemC. mail me the code at rahul.malik@amd.com. Thanks
Hello, I had some slack issue for my design during synthesis due to the 14-bit adder inside my design. Can you guys help? Thanks.
I'm doing a lab report from the quartus 2 software I used and compiled and simulated. waveform and timing from schematic of 2 full adders connected. What is the boolean equation of a 2 bit adder. thank you
I have an interesting Project. I have to design an 20 bit adder. Where My 3 inputs is given in one signal, such that my inputs are differentiated by 1 clock signal. i.e. If my inputs are A B C, my inputs are received such that at 1 st clock cycle I will have A and 2nd has B and third has C. *Now I have to take all 3 inputs(from single input) and
4-bit adder using 2 2-bit adder VHDL - All About Circuits Forum
i need 32-bit alu verilog code for my project. please help me.
Hello Guys, Let me first apologize if this is in the wrong section, but I need to implement a 4-bit adder on a transistor level circuit and implement a layout representation of it as part of a project. I've been doing some reading and the Manchester Carry Chain adder looked a good prospect as a result of the lower number of transistors (...)
Hey guys I am having an issue with this 4 bit adder. I was told to include my adder1.vhd file into the folder for my adder4 project. Whenever I try to compile my code (I think its right) I am getting an error saying: Error (10430): VHDL Primary Unit Declaration error at adder1.vhd(3): primary unit (...)
The following is one simple 4 bit up counter verilog code I made using a 4 bit adder verilog code ( a working file , tested). I happens that when I include the adder instantiation the clock stops working and hence entire code stops working. Any suggestions of what possibly went wrong???? (...)
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 (...)
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 (...)
Here it is ! library ieee; use ieee.std_logic_1164.all; -- Full adder component used in the 4-bit by 4-bit adder entity adder is port ( a : in std_logic; b : in std_logic; cin : in std_logic; sum : out std_logic; cout : out std_logic); end (...)
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 (...)
Hi kamesh419, Actually,it already told you the reason of errors and how to fix it in the following: ERROR: Netlister: unable to descend into any of the views defined in the view list: "spectreS cmos_sch schematic" for instance I5 in cell Add_rpl_8. Either add one of these views to: Library:MyLib Cell:GlitchAnalyzer or modify the vi
Dear all, I have a model. The Model is shown in the following link below. It has an 1) 8-bit adder 2) a verilog-A Module 3) Some VPWLF Sources which take "files" as inputs. Some facts: 1) I have to simulate it for 8, 12 and 16 bit adders. 2) So the number of VPWLF sources also change
Dear all, I have a model. The Model is shown in the following link below. It has an 1) 8-bit adder 2) a verilog-A Module 3) Some VPWLF Sources which take "files" as inputs. Some facts: 1) I have to simulate it for 8, 12 and 16 bit adders.
Hello everyone, I hope everyone are fine. I am an EE student and have been asked to Design a 32-bit Static CMOS adder with Minimum Area Delay-Squared Product. Well I am looking for some ideas and help on getting me started. Any kind help would do a lot to me. SOME NOTES GIVEN TO ME. The goal is to design an unsigned 32-bit (...)
What is the fastest logic for building a 8-bit * 10-bit multiplier and could some one help with the code? I could do with a 8-bit * 8-bit multiplier but i need the fastest logic Thanks in advance
hi, all i want full costume design for adder circuit if anyone can contribute ur moat welcome..thanks..
16-bit BCD adder what is this adder do?? ty in afvance
howcan we design n bit high speed adder using active vhdl
yep ,i think u can re-design the 16bit add into a 2 8-bits add in 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
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_
hey, anyone who know about how to call one project to other project, i have the three 12 bit up/down counter so i give the three output of counter to the input of 3 bit adder so how can i do this pls help to slove this. This doesn't make complete sense. I think you mean "I have 3 (three) 12b up/dn counters. I
or (c_out, c2, c_in); Highlighten in bold isn't correct.
Hi all, Recently, I am doing a homework which is to design a 32-bit adder with low power(verilog far as I know there are many different structures of adder, like Carry-bypass, Carry select, Carry look ahead....... Since I am new to digital design, I am not sure which structure consumes less power ? (...)
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 (...)
Hello, What's wrong with this code: library ieee; use ieee.numeric_std.all; entity adder is port(a,b: in signed(3 downto 0); c: out signed(4 downto 0)); end entity adder; architecture adder1 of adder is begin c <= ('0'&a) + ('0'&b); end architecture adder1; Error given by (...)
Hi I want to create schematic of a verilog file in cadence. My goal is to simulate verilog file in cadence ADE-XL using ADC and DAC. But, when i make a verilog file (of simple 8 bit adder) and its symbol in cadence, its netlist don't get generated at simulation level and i get an error.
hello embers I want to make port for microcontroller in verilog code I want to write verilog code for 8 bit port module port (data_in,data_out ) input data_in; outputdata_out; wire data_out; endmodule I think its not enough tell me what I do to make port in verilog I did google but I did not get success
I guess, that 64-bit CLA adder is bad idea due to very complicated expressions for generate and propagate signals. I would recommend to use eight 8-bit CLA adders with additional group propagate and generate signals as a building block for 64-bit adder. Here is the example from @lter@ (...)
Hi All, I am using Digilent Spartan-3 board with Xilinx Webpack 6.3i. In my design I used: -16x16 multiplier -32-bit comparator less -32-bit comparator greater -32-bit comparator equal -32-bit adder Since I just used <,>,=,+, and * in my verilog I don't know what type of design (...)
If you want to add two 6 bits signed digit, then the results will be 7 bits. You sign extend the MSBs of the two numbers to have a result of 7 bits. For example if you add the 6'b10_0110 (which is -26 in 2's complement) and 6'b00_0110 (which is 6), sign extended (7'b1100110 + 7'b0000110) then the result will be 7 digits (1101100) which is (...)
I have a decimal number 1.75 (2 decimal places) but I want to represent it as a 2's complement bit in verilog. How do I do it? Thanks
If I build a 20-bit adder with transisters in analog library (because I don't have digital library), is it much different from the adder building with digital standard cell? And what should I pay attention to build it? When it is finished, how can I simulate it easily? The software I used is Cadance. Thanks!
If I build a 20-bit adder with transisters in analog library (because I don't have digital library), is it much different from the adder building with digital standard cell? And what should I pay attention to build it? When it is finished, how can I simulate to make sure it works right? How to add input signals for a 20-bit (...)
Yes, it is 4-bit signed times 4-bit signed and result is 8-bit signed.
a block carry look ahead adder would be an optimised one with carry and the sum being generated from pass transisitor logic.. in block carry look ahead adder u combine M bits implement it in look ahead adder fashion .. ie combine 4 bits of 32 hence 8 blocks
Hello All, Anyone got any idea how to improve timing for a large adder? What i mean is the multiple bit adder for example 14 bit adder?. For example, for the 14-bit adder, adder = in1 + in2 + carry ( which come from a long list of (...)
Hi... I have been trying to a verilog code for 8 bit signed adder... To add the negative number we complement it and add it with the positive number with a carry in as '1'. However when we get the carry out of the above process as zeros then we have to compute the two's complement of the result. For this we have to complement the (...)
Hello Friends, I am having two doubts 1) is there anyway to design 16-bit adder without for loop? 2) I want to use this adder in the multiplier. How can i use this design unit in the multiplier block? Shall i use 'include and instantiate the adder? Thanks and Regards Deepak
Hi guys .. Normally, if we have an n-bit signed adder, the output of this adder should be n+1 bits. For example, if I have 4-bit adder, the sum of the 2 inputs of the adder will be of size 5-bits because of the possible carry-out. When I designed an (...)
Trying to perform addition on the op code 010 but i cant use + sign as the requirement for addition so im trying to perform it using a ripple carry half bit adder but i dont think my loop is ok. Because if i perform 011 + 111 i do get correct result.. any suggestions? LIBRARY ieee; USE ieee.std_logic_1164.ALL; USE
i need an 8 bit alu verilog code(gate level) can anybody help me?
Can you send out a 8 bit data in two package. That is: first send out bit, then send out bit.


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