Manual Fixed-Point Conversion in MATLAB

Assisted floating-point algorithm to fixed-point algorithm conversion

Use the buildInstrumentedMex function to instrument your algorithm for logging minimum and maximum values of all named and intermediate variables. Use the showInstrumentationResults function to propose fixed-point data types based on these logged values.

Functions

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Instrumentation

`buildInstrumentedMex`	Generate compiled C code function including logging instrumentation
`showInstrumentationResults`	Results logged by instrumented, compiled C code function
`clearInstrumentationResults`	Clear results logged by instrumented, compiled C code function

Define Fixed-Point Data Types

`fi`	Construct fixed-point numeric object
`fimath`	Set fixed-point math settings
`numerictype`	Construct an `embedded.numerictype` object describing fixed-point or floating-point data type

Cast Between Data Types

`eye`	Create identity matrix with fixed-point properties
`ones`	Create array of all ones with fixed-point properties
`zeros`	Create array of all zeros with fixed-point properties
`cast`	Cast variable to different data type
`cast64BitFiToInt`	Cast `fi` object types that can be exactly represented to a 64-bit integer data type (Since R2020a)
`cast64BitIntToFi`	Cast 64-bit integer types to an equivalent `fi` object type (Since R2020a)
`castFiToInt`	Cast fi object to equivalent integer data type (Since R2020a)
`castFiToMATLAB`	Cast `fi` object type to an equivalent built-in MATLAB data type (Since R2020a)
`castIntToFi`	Cast an integer data type to equivalent `fi` type (Since R2020a)

Topics

Fixed-Point Conversion Workflows
Learn which fixed-point conversion method best matches your end goal and your level of fixed-point expertise.
Decide Which Workflow Is Right for Your Application
Learn the benefits of each conversion workflow to help you decide which one best fits your needs.
Manual Fixed-Point Conversion Workflow
Learn about workflow for manual float-to-fixed conversion.
Manual Fixed-Point Conversion Best Practices
Get from generic MATLAB^® code to an efficient fixed-point implementation using manual fixed-point conversion.
Manually Convert a Floating-Point MATLAB Algorithm to Fixed Point
Explore best practices for manual fixed-point conversion.
Know When a Function Is Supported for Instrumentation and Acceleration
Determine which functions are supported for fixed-point conversion.