Divide by Constant and Round

Divide input by a constant and round to integer

• Library:

• Fixed-Point Designer

• 

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Description

The Divide by Constant and Round block outputs the result of dividing the input by a constant and rounds the result to an integer using the specified rounding method.

The Divide by Constant and Round block uses an algorithm that is functionally similar to the Granlund-Montgomery-Warren Method. The division operation is computed via a multiplication by inverse, which generally results in better performance on embedded systems.

Ports

Input

X — Dividend

scalar | vector | matrix | N-D array

Dividend, specified as a scalar, vector, matrix, or N-D array.

Divide by Constant and Round does not support data types with word length greater than 128. Slope-bias representation is not supported for fixed-point data types.

Data Types: single | double | int8 | int16 | int32 | uint8 | uint16 | uint32 | Boolean | fixed point
Complex Number Support: Yes

Output

Y — Result of division and round operation

scalar | vector | matrix | N-D array

Result of division and round operation, returned as a scalar, vector, matrix, or N-D array.

Data Types: single | double | int8 | int16 | int32 | uint8 | uint16 | uint32 | Boolean | fixed point

Parameters

Denominator — Divisor

10 (default) | scalar

Divisor, specified as a positive, real-valued, finite scalar.

Programmatic Use

Block Parameter: Denominator

Type: character vector

Values: MATLAB® expression that evaluates to a positive, real-valued, finite fixed point or numeric value

Default: '10'

Data Types: single | double | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64 | Boolean | fixed point

Rounding Method — Rounding method to use

Floor (default) | Ceiling | Nearest | Zero | Convergent

Rounding method to use, specified as one of these values:

• Floor — Round to nearest integer in the direction of negative infinity.

• Ceiling — Round to nearest integer in the direction of positive infinity.

• Nearest — Round to the nearest integer. Ties are rounded to the nearest integer in the direction of positive infinity.

• Zero — Round to the nearest integer in the direction of zero.

• Convergent — Round to the nearest integer. Ties are rounded to the nearest even integer.

Programmatic Use

Block Parameter: RndMeth

Type: character vector

Values: 'Floor' | 'Ceiling' | 'Nearest' | 'Zero' | 'Convergent'

Default: 'Floor'

Extended Capabilities

C/C++ Code Generation

Generate C and C++ code using Simulink® Coder™.

Slope-bias representation is not supported for fixed-point data types.

Fixed-Point Conversion

Design and simulate fixed-point systems using Fixed-Point Designer™.

Slope-bias representation is not supported for fixed-point data types.

Version History

Introduced in R2021a