Floating Point IP Library Parameters
You can access the floating-point parameters in the HDL Code Generation > Floating Point pane in the Configuration Parameters dialog box.
Use Floating Point
Use the native floating-point library in your design. You can specify the latency strategy and whether to handle denormal numbers in your design. See Native Floating-Point Parameters.
Map your design to the native floating-point target library.
Do not map your design to the native floating-point target library.
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For example, you can enable the
UseFloatingPoint setting when you
generate HDL code for the
symmetric_fir subsystem inside the
sfir_single model by using either of these methods:
Pass the property as an argument to the
makehdl('sfir_single/symmetric_fir', ... 'UseFloatingPoint','on')
When you use
hdlset_param, set the parameter on the model and then generate HDL code by using
Vendor Specific Floating Point Library
Select a vendor-specific floating-point library in your design, based on the setting of the Synthesis Tool parameter and use the library in combination with a native floating-point (NFP) library. Using a NFP and vendor-specific floating point library together in a mixed design more efficiently uses resources on the FPGA, such as hardened DSP floating point adder or multiplier primitives, which allows you to fit a bigger design into the FPGA fabric.
The options are:
Use only the native floating-point mode to target ASIC devices or generate vendor-independent code that you can use on different FPGA or SoC devices.
Specify Altera® Megafunctions (ALTERA FP FUNCTIONS) as the floating-point target library. You can provide the IP target frequency.
Specify Altera Megafunctions (ALTFP) as the floating-point target library. You can provide the objective and latency strategy for the IP.
Specify Xilinx® LogiCORE® as the floating-point target library. You can provide the objective and latency strategy for the IP.
To specify this parameter, set the Synthesis Tool parameter to your target tool and select Use Floating Point. The options for Vendor Specific Floating Point Library depend on the synthesis tool you select.
To set the vendor-specific floating-point library:
hdlcoder.createFloatingPointTargetConfigfunction to create a floating-point IP configuration object,
hdlcoder.FloatingPointTargetConfig, for the floating-point library. For example, to create a mixed-mode floating-point target configuration with the native floating point library and the
ALTERA FP FUNCTIONSlibrary as the vendor-specific floating point library, use this command:
fpconfig = hdlcoder.createFloatingPointTargetConfig("NativeFloatingPoint",... VendorFloatingPointLibrary = "AlteraFPFunctions");
Set the floating-point target configuration on the model and generate HDL code. For example, to set the configuration on the
sfir_singlemodel and generate HDL code for the
hdlset_param("sfir_single", FloatingPointTargetConfiguration = fpconfig); makehdl('sfir_single/symmetric_fir')
To get the floating point target configuration object from the model, enter:
fpconfig = hdlget_param("sfir_single", 'FloatingPointTargetConfiguration')