Native Floating Point Support for Simulink Blocks - MATLAB & Simulink (original) (raw)

You can use HDL Coder™ native floating-point to generate target-independent HDL code from a floating-point design. Floating-point designs have better precision, higher dynamic range, and a shorter development cycle than fixed-point designs. If your design has complex math and trigonometric operations, use native floating-point technology.

This page lists the Simulink® blocks and parameter settings that you can use with HDL Coder native floating point.

HDL Floating Point Operations Library

In the HDL Floating Point Operations library, HDL Coder supports blocks that havesingle and double data types in the native floating-point mode. For certain blocks, such as Discrete-Time Integrator andDiscrete PID Controller, use zero latency strategy.

When you use half types, HDL Coder supports native floating-point for these blocks:

• Add
• Bus to Vector
• Divide
• Dot Product
• Float Typecast
• Gain
• Logical Operator
• Multiply-Add
• Probe
• Product
• Product of Elements
• Reciprocal
• Relational Operator
• Subtract
• Sum of Elements
• Signal Conversion
• Terminator
• Transpose
• Unary Minus

Support for Simulink Blocks in Math Operations Library

In the Math Operations library, HDL Coder supports native floating-point for these blocks and data types:

Support for Functions in Math Function Block

In the Math Function block, HDL Coder supports native floating-point for these functions:

Support for Simulink Blocks in Other Libraries

HDL Coder supports native floating-point for these HDL Coder block libraries.

Support for Stateflow Charts

HDL Coder supports Stateflow® charts with these data types when generating code in native floating-point mode:

• Floating-point constants
• Floating-point inputs
• Function calls with floating-point arguments
• Floating-point arithmetic operations

These chart types are supported:

• Classic charts
• Mealy charts
• State transition tables
• Truth tables
• Requirement tables

Stateflow charts and Moore charts with conditional transitions are not supported. For more information on conditional transitions in Stateflow charts, see Transition Between Operating Modes (Stateflow).

Simulink Block Restrictions

HDL Coder does not support native floating-point for these blocks or block architectures:

• Dot Product blocks that have complex-valued input or output data with the Architecture parameter set to Tree or Linear
• Dead Zone and Dead Zone Dynamic blocks
• Polar to Cartesian blocks

For the Data Type Conversion block:

• The Input and output to have equal parameter cannot be set toStored Integer (SI).
• The Saturate on integer overflow check box must be left cleared.

See Also

Modeling Guidelines

• Modeling with Native Floating Point

Functions

• createFloatingPointTargetConfig

Topics

• Floating Point Support: Field-Oriented Control Algorithm
• Getting Started with HDL Coder Native Floating-Point Support
• Numeric Considerations for Native Floating-Point
• Generate Target-Independent HDL Code with Native Floating-Point