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In practice, the division and modulus operators are typically only usable in simulation, not synthesis. Division is a particularly complicated operation, and most programmable chips do not have dedicated divider modules. There are a number of logical operators. Logical operators act on an entire value multiple bitsand treat the values of "zero" as being arithmetic and logical binary operators in verilog, and "non-zero" as being "true".

What happens is that Verilog converts the whole number into either a 1 if it contains a nonzero bit or 0 if it only contains zerothen performs the equivalent bitwise operation. Thus, the answer is also one bit. There are a number of bitwise operators to perform boolean operations on each individual bit in a bus. The continuous assignment is typically used with wires and other structures that do not have memory.

A continuous assignment is happening continuously and in parallel to all other computational tasks. The order of continuous assignments, or their location in the code do not matter. Non-blocking assignments are assignments that occur once, but which can all happen at the same time.

These assignments are typically used with registers and integer data types, and other data types with memory. The following two code snippets with non-blocking assignments are equivalent:. All non-blocking assignments in a single code block occur simultaneously. They happen only once, and the input values for all arithmetic and logical binary operators in verilog assignments are read before the operation takes arithmetic and logical binary operators in verilog which requires the use of additional latch structures in synthesis.

Blocking assignments are also used with registers and integers and other memory data types. Blocking assignments occur sequentially, and the code after the assignment will not execute until the assignment has occured. From Wikibooks, open books for an open world. Retrieved from " https: Views Read Edit View history.

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Verilog HDL operators can be divided into several groups. The arithmetic operators can be used with all data types. The modulus operator is not allowed for real data type variables. For the modulus operator, the result takes the sign of the first operand. Examples of using these operators are shown in Example 1.

The relational operators are used to compare expressions. The value returned by the relational operators is 0 if the expression evaluates to false and 1 if expression evaluates to true.

Examples of using the relational operators are shown in Example 2. The equality operators are used to compare expressions. If a comparison fails, then the result will be 0, otherwise it will be 1. Otherwise it will be true or false. Examples of using the equality operators are shown in Example 3. The logical operators are used to connect expressions.

The result for these operators is 0 when false , 1 when true , and unknown x - when ambiguous. Examples of using the logical operators are shown in Example 4. The bit-wise operators calculate each bit of results by evaluating the logical expression on a pair of corresponding operand bits. Examples of using the bit-wise operators are shown in Example 5. The reduction operator produces a 1-bit result.

This result is calculated by recursively applying bit-wise operation on all bits of the operand. At each step of this recursive calculation the logical bit-wise operation is performed on the result of a previous operation and on the next bit of the operand.

The operation is repeated for all bits of the operand. Examples of using the reduction operators are in shown Example 6. The shift operators perform left and right shifts on their left operand by the number of positions specified by their right operand.

All vacated bits are filled with zeroes. If the expression that specifies the number of bits to shift right operand has unknown x or high-impedance z value, then result will be unknown. Examples of using the shift operators are in shown Example 7.