Package: hdlcoder
Specify IP settings for selected floating-point configuration
Use the hdlcoder.FloatingPointTargetConfig.IPConfig object
to see the list of supported IP blocks for a floating-point library.
The IP configuration depends on the library settings. The library
settings are specific to the floating-point library that you choose.
Create a floating-point target configuration object for the library.
fpconfig = hdlcoder.createFloatingPointTargetConfig('ALTFP');To see the IP settings, use the IPConfig object.
fpconfig.IPConfig
Optionally, to customize the IP configuration, use the customize method
of the floating-point configuration object.
fpconfig.IPConfig shows
the IP settings for the fpconfig floating-point
target configuration that you create for the floating-point library.
| customize | Customize IP configuration for specified floating-point library |
This example shows how to create a floating-point target configuration with Altera® Megafunctions (ALTFP) in HDL Coder, and then generate code.
Create a Floating-Point Target Configuration
To create a floating-point configuration, use hdlcoder.createFloatingPointTargetConfig. Before creating a configuration, set up the path to your synthesis tool.
hdlsetuptoolpath('ToolName', 'Altera Quartus II', ... 'ToolPath', 'C:/Altera/16.0/quartus/bin64/quartus.exe'); load_system('sfir_single') fpconfig = hdlcoder.createFloatingPointTargetConfig('ALTFP')
Prepending following Altera Quartus II path(s) to the system path:
C:\Altera\16.0\quartus\bin64
fpconfig =
FloatingPointTargetConfig with properties:
Library: 'ALTFP'
LibrarySettings: [1×1 fpconfig.LatencyDrivenMode]
IPConfig: [1×1 hdlcoder.FloatingPointTargetConfig.IPConfig]
Specify Custom Library Settings
Optionally, to customize the floating-point configuration, specify custom library settings.
fpconfig.LibrarySettings.LatencyStrategy = 'MAX'; fpconfig.LibrarySettings.Objective = 'AREA'; fpconfig.LibrarySettings
ans =
LatencyDrivenMode with properties:
LatencyStrategy: 'MAX'
Objective: 'AREA'
View Latency of Floating-Point IPs
The IPConfig object displays the maximum amd minimum latency values of the floating-point operators.
fpconfig.IPConfig
ans =
Name DataType MinLatency MaxLatency Latency ExtraArgs
_________ _______________________ __________ __________ _______ _________
'ABS' 'DOUBLE' 1 1 -1 ''
'ABS' 'SINGLE' 1 1 -1 ''
'ADDSUB' 'DOUBLE' 7 14 -1 ''
'ADDSUB' 'SINGLE' 7 14 -1 ''
'CONVERT' 'DOUBLE_TO_NUMERICTYPE' 6 6 -1 ''
'CONVERT' 'NUMERICTYPE_TO_DOUBLE' 6 6 -1 ''
'CONVERT' 'NUMERICTYPE_TO_SINGLE' 6 6 -1 ''
'CONVERT' 'SINGLE_TO_NUMERICTYPE' 6 6 -1 ''
'COS' 'SINGLE' 35 35 -1 ''
'DIV' 'DOUBLE' 10 61 -1 ''
'DIV' 'SINGLE' 6 33 -1 ''
'EXP' 'DOUBLE' 25 25 -1 ''
'EXP' 'SINGLE' 17 17 -1 ''
'LOG' 'DOUBLE' 34 34 -1 ''
'LOG' 'SINGLE' 21 21 -1 ''
'MUL' 'DOUBLE' 11 11 -1 ''
'MUL' 'SINGLE' 11 11 -1 ''
'RECIP' 'DOUBLE' 27 27 -1 ''
'RECIP' 'SINGLE' 20 20 -1 ''
'RELOP' 'DOUBLE' 1 3 -1 ''
'RELOP' 'SINGLE' 1 3 -1 ''
'RSQRT' 'DOUBLE' 36 36 -1 ''
'RSQRT' 'SINGLE' 26 26 -1 ''
'SIN' 'SINGLE' 36 36 -1 ''
'SQRT' 'DOUBLE' 30 57 -1 ''
'SQRT' 'SINGLE' 16 28 -1 ''
Customize Latency of ADDSUB IP
Using the customize method of the IPConfig object, you can customize the latency of the floating-point IP and specify any additional arguments.
fpconfig.IPConfig.customize('ADDSUB','Single','Latency',6); fpconfig.IPConfig
ans =
Name DataType MinLatency MaxLatency Latency ExtraArgs
_________ _______________________ __________ __________ _______ _________
'ABS' 'DOUBLE' 1 1 -1 ''
'ABS' 'SINGLE' 1 1 -1 ''
'ADDSUB' 'DOUBLE' 7 14 -1 ''
'ADDSUB' 'SINGLE' 7 14 6 ''
'CONVERT' 'DOUBLE_TO_NUMERICTYPE' 6 6 -1 ''
'CONVERT' 'NUMERICTYPE_TO_DOUBLE' 6 6 -1 ''
'CONVERT' 'NUMERICTYPE_TO_SINGLE' 6 6 -1 ''
'CONVERT' 'SINGLE_TO_NUMERICTYPE' 6 6 -1 ''
'COS' 'SINGLE' 35 35 -1 ''
'DIV' 'DOUBLE' 10 61 -1 ''
'DIV' 'SINGLE' 6 33 -1 ''
'EXP' 'DOUBLE' 25 25 -1 ''
'EXP' 'SINGLE' 17 17 -1 ''
'LOG' 'DOUBLE' 34 34 -1 ''
'LOG' 'SINGLE' 21 21 -1 ''
'MUL' 'DOUBLE' 11 11 -1 ''
'MUL' 'SINGLE' 11 11 -1 ''
'RECIP' 'DOUBLE' 27 27 -1 ''
'RECIP' 'SINGLE' 20 20 -1 ''
'RELOP' 'DOUBLE' 1 3 -1 ''
'RELOP' 'SINGLE' 1 3 -1 ''
'RSQRT' 'DOUBLE' 36 36 -1 ''
'RSQRT' 'SINGLE' 26 26 -1 ''
'SIN' 'SINGLE' 36 36 -1 ''
'SQRT' 'DOUBLE' 30 57 -1 ''
'SQRT' 'SINGLE' 16 28 -1 ''
Generate Code
makehdl('sfir_single/symmetric_fir','FloatingPointTargetConfiguration',fpconfig, ... 'TargetDirectory','C:/FloatingPoint/hdlsrc','SynthesisToolChipFamily','Arria10')
### Generating HDL for 'sfir_single/symmetric_fir'. ### Starting HDL check. ### Using C:\Altera\16.0\quartus\bin64\qmegawiz for the selected floating point IP library. ### The code generation and optimization options you have chosen have introduced additional pipeline delays. ### The delay balancing feature has automatically inserted matching delays for compensation. ### The DUT requires an initial pipeline setup latency. Each output port experiences these additional delays. ### Output port 0: 30 cycles. ### Output port 1: 30 cycles. ### Generating Altera(R) megafunction: altfp_add_single for latency of 6. ### Found an existing generated file in a previous session: (C:\FloatingPoint\hdlsrc\sfir_single\Altera\Arria10\unspecified\L6\altfp_add_single.vhd). Reusing the generated file. ### Done. ### Generating Altera(R) megafunction: altfp_mul_single for latency of 11. ### Found an existing generated file in a previous session: (C:\FloatingPoint\hdlsrc\sfir_single\Altera\Arria10\unspecified\L11\altfp_mul_single.vhd). Reusing the generated file. ### Done. ### Begin VHDL Code Generation for 'sfir_single'. ### Working on sfir_single/symmetric_fir as C:\FloatingPoint\hdlsrc\sfir_single\symmetric_fir.vhd. ### Generating package file C:\FloatingPoint\hdlsrc\sfir_single\symmetric_fir_pkg.vhd. ### Creating HDL Code Generation Check Report file://C:\FloatingPoint\hdlsrc\sfir_single\symmetric_fir_report.html ### HDL check for 'sfir_single' complete with 0 errors, 7 warnings, and 0 messages. ### HDL code generation complete.
The latency of the ADDSUB IP is 6 and not the maximum latency value of 14.
The generated VHDL code is saved in the hdlsrc folder.
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