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34 Threads found on Barrel Shifter
Took a look at some papers on this and it's a pretty interesting parallel implementation of multiplication. Though looking at it I can't understand how a barrel shifter would be used to implement it. About the only way I can envision using a barrel shifter is if the implementation is done as an FSM algorithm with a single (...)
hi,I am trying to implement 8-bit vedic multiplier using barrel shifter with nikhilam sutra using VHDL. while implementation I am getting confusion about the use of barrel shifter. Can please suggest me the process with an example.
hi everyone we need to design 32-bit barrel shifter using 2x1 mux and 8x1 mux which can shift right,left, rotate right and left can anyone provide us block / circuit level implementation or Verilog code for the same
Why are you doing this as instantiated 2 to 1 multiplexers? It would be much simpler to do this as behavioral code. // 8-bit barrel shift case (select) 0 : bshft <= d; 1 : bshft <= {d, d}; // change d to 1'b0 if you want a left shift and not a barrel shift 2 : bshft <= {d, d}; // change d
Basically, it's a bunch of multiplexers. Once you understand that, writing the VHDL should be pretty straight forward. Here's a start: If I were doing this, I wouldn't bother with the explicit muxes; the synthesis tool should be able to infer that from your higher-level description.
Hi., can you please let me know how barrel shifter works in arm core..? Why one of the source register is connected to ALU directly, whereas other source register is connect to ALU via barrel shifter..? Thanks,
hi, I designed barrel shifter using tanner EDA design should have low power.But i am not able to find the total power dissipation using Tanner EDA. Please can anyone explain how to find the power dissipation using either S-Edit or T-Spice.Please help me.
how to design a 6 bit barrel shifter???? conditions 000 Y=A 001 y= A rot 1 010 y= A rot 2 011 y= A rot 3 100 y= A rot 4 101 y= A rot 5 110,111 y= A
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 (...)
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
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?
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.
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 (...)
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
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.
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
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
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 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
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 (...)
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
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
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
vhdl code for barrel shifter,4 bit divider and,4 bit serial adder
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
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??
If shift operation is performed based on input clock then it is sequantial, else combinational. The barrel shifter is an example of combinational.
hi i want to design barrel shifter using combinational logic can any body help me 4 that thanks in advance
Source code for 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 (...)
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
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
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 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