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37 Threads found on edaboard.com: Barrel Shifter
hi simple code for barrel shifter is given in VHDL primer J. Bhaskar book but it is in VHDL . I think its logic can easily be converted to Verilog code bye
Hi, everybody! If we want to implemented the MAC instruction, Why do we need the barrel shifer to accellerate its speed? thanks for any reply clive chen
hi i want to design barrel shifter using combinational logic can any body help me 4 that thanks in advance
i have to design a barrel shifter and a logarithmic shifter of the 4-by-4 shifter and have to compare them in terms of area, delay, and power. how to determine the area of the shifter?? which shifter give the lower delay and power??
vhdl code for barrel shifter,4 bit divider and,4 bit serial adder
hello !! please help me in solving the following question : Design a 8 bit barrel shifter has 3 bit input control signal . CTRL Output 000 shift left 1 001 shift left 2 010 shift left 3 011 shift left 4
Design a barrel shifter for 16 bit words in VHDL. This barrel shifter is capable of logical shifting input toward left and right direction. Two different architecture designs of the same barrel shifter must be implemented and tested with the testbench you also need to develop. One (...)
Hi, I would need to design a 15-bit barrel shifter; I mean a barrel shifter having 15 inputs, 15 outputs, rotating according to 4 control bits. I need the real architecture, described in terms of logic gates, not the verilogA. Usually barrel shifter have a number of inputs which is a (...)
hi i want to design a 8 bit barrel shifter and i want to do some hand calculation such as power ,delay, noise margin.after that i should draw a schematic and do simulation.then draw layout for that.finally i must extract the circuit and do a post layout simulation for that.but i have problems. what must i see in the first simulation and how i can
hello everybody. i read a paper about the ldpc decoder the block diagram of decoder ,it uses two stage barrel sifter .i cant find why it uses two stage.can anybody tell me? the papaer is attached.and the barrel shifter is in the figure 8 in page 1453 by reguard.
I am realizing a N-bit barrel shifter. Here it is my component: entity barrel_shifter is Generic ( N : integer := 4); Port ( data_in : in STD_LOGIC_VECTOR (N-1 downto 0); shift : in STD_LOGIC_VECTOR (integer(ceil(log2(real(N))))-1 downto 0); -- log2 of N => number of inputs for the shift (...)
I'm assuming your code is trying to shift a 32-bit word left 32 bits into a 64-bit word, right? A barrel shifter is a PHYSICAL realization IMPLIED by your VHDL code.
hi everyone, i am trying to design an 8 bit barrel shifter by use of tanner tools. i dont know where to start ..... plz tell me the basic building block and what are the important parts to design?
Design overview After putting some thought into the design of a barrel shifter it is clear that some sort of multiplexer circuitry is required to select how the input bits route to the output bits. A naive method of implementing a barrel shifter would be to use N (where N is the number of input bits) parallel N-to-1 (...)
barrel shifters are transmission gate arrays rather than a series of registers (otherwise known as combinational shifters). It is modified from a crossbar switch layout requiring (n-bit x n-bit) gates. They have the advantage that shifting is carried out over a single operation. The layout is regular and hence highly efficient. (...)
Hi, everybody I want to design a barrel shifer in our design, but I don't how to discribe it using verilog language, or it is only can be generated in the synthetize statge? thanks for any reply!! clive chen
Source code for a barrel shifter:
Hello friends, Can anyone help me out with barrel shifters. I just want a simple theory on what barrel shifter and a easy spec of a 8-bit barrel shifter. Please provide me some material. Thank you.
RTL coding.. or any other efficient 32bit shifter to perform left and right shifting ??? Hi Santosh , What is your target platform , FPGA , ASIC or just Verilog Simulation . Do you have timing constraints that you have to do this in one clock cycle . barrel Shiftier is a combinational circ
Hello Gurus, You know that cell-based design employs a scan-chain method to perform DFT. When your chip goes mass production, test vectors are feed into the chip, walk through the scan-chain, and tell you whether the chip works or not. The question is for full custom layout design. How to tell your component, e.g. domino circuit, barrel-sh
Can anybody share me some information about the average or approximate gate count numbers for following ASIC building blocks? 1)16*16 booth multiplier 2) two 16bit inputs ALU, traditional arithmetic(add,sub....) and logic (and,or,xor....) operations supported 3)16bit barrel shifter,supporting traditional logic shift and arithmetic shift 4)16*16
It is a known fact that the 8051 CPU lacks a barrel shifter. On the other hand, the operation ino = ino & (ino-1); does not need a barrel shifter.
Hi all, I am reading a article. It mentions "multi-layer switching networks including, e.g. omega(perfect shuffle)/delta networks, log shifter networks, etc.". But why not use single-layer instead of multi-layer switch network? I know simple barrel shifter. What's omega, delta and log shifter? Any suggestions (...)
The trick to designing a good ARM ALU is to put the barrel-shifter for the second operand in a different pipeline stage to the adder.
barrel shifter: A barrel shifter is a hardware device that can shift a data word by any number of bits in a single operation. It is implemented like a multiplexer, each output can be connected to any input depending on the shift distance. Take for example a 4-bit barrel shifter, with (...)
What you have written according to it both the multiplication and shifting should complete in one clock cycle only. For modelsim you are not providing any timing information. So it generates no error. To do shifiting of data in single clock one needs what is known as barrel shifter circuit! and not shift register.
There are also combinational shifters like barrel shifters. The question of sequential or combinational depend on the type of the hardware elements u are using. If you use any memory elements like FLIPFLOPS or latches then that is sequential.
Hi Pls elaborate what do you mean by 'available'? you can design whatever you like Usually I would say there are 2 kind: single shift register: can shift 1 bit at a time barrel shifter : can shift n bits at a time. Then you can have categories: shift left, shift right, shift with paralle load or shift with just serial load etc... Kr, Av
The difference between a "stardard" CPU and a DSP is that the DSP has optimized multiplying and adding units .Also there is a barrel shifter means that it can do multiplications and accumulations very fast . People talk about MACs (multiply and accumulate operations) to do an important number of MACS the whole machine must very optimized to
16bits rotate left can I write verilog like this: rotate_left: //Need 16 2-to-1mux to finish 1-bit shift left if (!Cnt) in_stage2 = In; else in_stage2 = {In,In}; //Need 16 2-to-1mux to finish 2-bit shift left if (!Cnt) in_stage3 = in_stag
hi Plz help me to construct a 16x1 Mux barrel shifter code in verilog. The given data is that we want to move the output data Shift left Shift Right Rotate Left Rotate Right
You can use barrel shifter for this purpose. barrel shifter is combinational circuit that can shift or rotate a data word by any number of bits in a single clock cycle.
Hi guys, I am doing a subject assignment in Uni. I need to design a barrel shifter (4X4). I done the circuit and now i try to draw the layout and met some weird problem. BTW: i am using IC station on RedHat. For your information, while drawing the layout you can invoke the logic (circuit) and put it beside the layout you gonna draw to ha
They are usually an integral part of a larger device but what you are asking for is normally called a "barrel shifter" rather than a shift register. They are used in fast math operations. Brian.
Can I refer you to a document? I was about to try to explain it, but this says it a nutshell: The dsPIC has a built in DSP, with facilities such as dual 40-bit accumulators, 16x16 multiply-and-accumulate, 40-bit barrel shifter, etc. That's in addition to a fully-featured (according t
Hi, I created an 8bit barrel shifter and now I want to simulate it using Xilinx ISE tools, specifically I want to do a Post-Route simulation (the last step). I do these steps: 1. Synthesize - XST 2. Implement Design 3. I check the "Synthesis Report" and find: "Minimum period: 3.281ns (Maximum Frequency: 304.785MHz)" Now when I create a
I am trying to use the barrel shifter provider by the design ware library so i am using this code which i copied from the examples coming with the library library IEEE,DWARE,DWARE; use IEEE.std_logic_1164.all; use DWARE.DWpackages.all; use DWARE.DW_foundation_comp.all; entity DW01_bsh_inst is generic (inst_A_width : POSIT