2019年8月21日 · Logical operators are predicated on Boolean or other 'bit' representing types. VHDL or Ada Integers are mathematically defined as value ranges while in Verilog or C are based on underlying integer types comprised of bits subject to bitwise operators while logical operators evaluated non-zero integer values.VHDL rray types with elements representing 'bits' also can have logical operators which ...

2013年11月30日 · With VHDL-2008, I recommend that you use the "and" reduction built-in (see Pedroni's post) and use the IEEE standard package "ieee.numeric_std_unsigned.all" instead of the shareware package "std_logic_unsigned".

2014年10月7日 · XOR using a 4:1 Mux in VHDL. 7. XOR operation in C++. 0. VHDL program for A xor b xor c. 1. bit to bit xor ...

2014年8月18日 · I want to do bit by bit xor with same input vector like: input(0) xor input(2) xor input(3) up to input(187). The answer I get is like: output(0) downto output (94) This means I have to do xor successively. If I have 10 input bits, the last answer I get is 5 bit output. Its very difficult and not a good approach to write the whole vector.

2018年10月16日 · With vhdl 2008, you can simply write: xor_gate_out <= xor n_in; if you're stuck with vhdl '93, all compilers I have ever used support the std_logic_misc non-standard library that contain reduction functions:

2016年3月2日 · At first, your code has to use an XOR instead of OR. ISE does not support the XOR reduction operator from VHDL'08, thus, you have to describe it manually. One solution is to use sequential statements within a process, which has also been suggested by @user1155120 in …

2013年10月1日 · A good place to start is the Wikipedia VHDL page, and the first one under Design examples is very similar to what you request, you just have to replace O <= I1 and I2; with Z <= A xor B xor C; and modify the interface accordingly. To get a simulator that can compile and simulate VHDL, you can use ModelSim-Altera Starter Edition, which is free.

2014年12月25日 · Here is your code with just 3 instances of the same component: library IEEE; use IEEE.STD_LOGIC_1164.ALL; entity triplexor ... end entity; architecture struct of triplexor is component myXor port ( i0, i0: in bit; o: out bit ); end component; architecture rtl of myXor is begin o <= i0 xor i1; end rtl; signal ya, yb, yout: bit; begin -- using port mapping by position inst_xor1: myXor port map ...

2016年3月11日 · bit to bit xor with same input vector in vhdl. 1. vhdl bitwise operation on vector. 11.

2013年4月29日 · VHDL program for A xor b xor c. 1. bit to bit xor with same input vector in vhdl. 1. Implements a 4 input ...