Fixed-Point Arithmetic

Fixed-point arithmetic operations in the software, and effects of data type and scaling

Fixed-point arithmetic refers to how signed or unsigned binary words are operated on. The simplicity of fixed-point arithmetic functions such as addition and subtraction allows for cost-effective hardware implementations.

Topics

Fixed-Point Arithmetic
Addition, subtraction, multiplication, casts, modulo, and two’s complement arithmetic.
Rules for Arithmetic Operations
Rules that the Simulink^® software follows when arithmetic operations are performed on inputs and parameters.
Shifts
Bit-shift operations for integers.
Conversions and Arithmetic Operations
Example highlighting how the data types are converted and arithmetic operations are performed on inputs and parameters in the Simulink software.
The Summation Process
Addition of n-bit numbers in the Simulink software.
The Multiplication Process
Multiplication of n-bit binary numbers with m-bit binary numbers in the Simulink software.
The Division Process
Integer division for fixed-point data types in the Simulink software.
fimath Properties Usage for Fixed-Point Arithmetic
Fixed-point arithmetic using fimath objects to control the results.

Featured Examples

Perform Fixed-Point Arithmetic

Perform basic fixed-point arithmetic operations.

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Set Fixed-Point Math Attributes

Set fixed point math attributes in MATLAB^® code.

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