Manual Conversion

Manual floating-point algorithm to fixed-point algorithm conversion


buildInstrumentedMexGenerate compiled C code function including logging instrumentation
showInstrumentationResultsResults logged by instrumented, compiled C code function
clearInstrumentationResultsClear results logged by instrumented, compiled C code function
fiConstruct fixed-point numeric object
fimathSet fixed-point math settings
numerictypeConstruct an embedded.numerictype object describing fixed-point or floating-point data type
zerosCreate array of all zeros with fixed-point properties
onesCreate array of all ones with fixed-point properties
castCast variable to different data type
cast64BitFiToIntCast fi object types that can be exactly represented to a 64-bit integer data type
cast64BitIntToFiCast 64-bit integer types to an equivalent fi object type
castFiToIntCast fi object to equivalent integer data type
castFiToMATLABCast fi object type to an equivalent built-in MATLAB data type
castIntToFiCast an integer data type to equivalent fi type

Examples and How To

Manually Convert a Floating-Point MATLAB Algorithm to Fixed Point

Manually convert floating-point MATLAB algorithm to fixed point.

Convert Fast Fourier Transform (FFT) to Fixed Point

This example shows how to convert a version of the Fast Fourier Transform (FFT) algorithm into fixed-point MATLAB code.

Detect Limit Cycles in Fixed-Point State-Space Systems

This example shows how to analyze a fixed-point state-space system to detect limit cycles.

Compute Quantization Error

This example shows how to compute and compare the statistics of the signal quantization error when using various rounding methods.


Fixed-Point Conversion Workflows

Learn more about the different fixed-point conversion methods. The conversion method you use depends on your end goal and your level of fixed-point expertise.

Manual Fixed-Point Conversion Workflow

Overview of workflow for manual float-to-fixed conversion.

Manual Fixed-Point Conversion Best Practices

These best practices help you get from generic MATLAB® code to an efficient fixed-point implementation using the manual fixed-point conversion workflow.


Decide Which Workflow is Right for Your Application

Describes benefits of each conversion workflow to help you decide which one best fits your needs.

Know When a Function is Supported for Instrumentation and Acceleration

Determine which functions are supported for fixed-point conversion.

Resolve Error: Function is not Supported for Fixed-Point Conversion

Troubleshoot functions that are not supported for fixed-point conversion.

Resolve Error: fi*non-fi

Troubleshoot fi*non-fi errors.

Resolve Error: Data Type Mismatch

Troubleshoot data type mismatch errors.

Resolve Error: Mismatched fimath

Troubleshoot mismatched fimath errors.

Featured Examples