Floating-Point IP Cores User Guide

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ID 683750
Date 10/27/2021
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Document Table of Contents
Document Table of Contents x
1. About Floating-Point IP Cores 2. FP_ACC_CUSTOM Intel® FPGA IP or Floating Point Custom Accumulator Intel® FPGA IP Core 3. ALTFP_ADD_SUB IP Core 4. ALTFP_DIV IP Core 5. ALTFP_MULT IP Core 6. ALTFP_SQRT 7. ALTFP_EXP IP Core 8. ALTFP_INV IP Core 9. ALTFP_INV_SQRT IP Core 10. ALTFP_LOG 11. ALTFP_ATAN IP Core 12. ALTFP_SINCOS IP Core 13. ALTFP_ABS IP Core 14. ALTFP_COMPARE IP Core 15. ALTFP_CONVERT IP Core 16. FP_FUNCTIONS Intel® FPGA IP or Floating Point Functions Intel® FPGA IP Core 17. Floating-Point IP Cores User Guide Document Archives 18. Document Revision History for the Floating-Point IP Cores User Guide
1. About Floating-Point IP Cores x
1.1. List of Floating-Point IP Cores 1.2. Installing and Licensing Intel® FPGA IP Cores 1.3. Design Flow 1.4. Upgrading IP Cores 1.5. Floating-Point IP Cores General Features 1.6. IEEE-754 Standard for Floating-Point Arithmetic 1.7. Non-IEEE-754 Standard Format 1.8. Floating-Points IP Cores Output Latency 1.9. Floating-Point IP Cores Design Example Files 1.10. VHDL Component Declaration 1.11. VHDL LIBRARY-USE Declaration
1.3. Design Flow x
1.3.1. IP Catalog and Parameter Editor 1.3.2. Specifying the IP Core Parameters and Options ( Intel® Quartus® Prime Pro Edition) 1.3.3. Generating IP Cores ( Intel® Quartus® Prime Standard Edition)
1.3.1. IP Catalog and Parameter Editor x
1.3.1.1. The Parameter Editor
1.3.2. Specifying the IP Core Parameters and Options ( Intel® Quartus® Prime Pro Edition) x
1.3.2.1. IP Core Generation Output ( Intel® Quartus® Prime Pro Edition)
1.4. Upgrading IP Cores x
1.4.1. Migrating IP Cores to a Different Device
1.6. IEEE-754 Standard for Floating-Point Arithmetic x
1.6.1. Floating-Point Formats 1.6.2. Special Case Numbers 1.6.3. Rounding
1.6.1. Floating-Point Formats x
1.6.1.1. Single-Precision Format 1.6.1.2. Double-Precision Format 1.6.1.3. Single-Extended Precision Format
2. FP_ACC_CUSTOM Intel® FPGA IP or Floating Point Custom Accumulator Intel® FPGA IP Core x
2.1. FP_ACC_CUSTOM Intel® FPGA IP or Floating Point Custom Accumulator Intel® FPGA IP Features 2.2. FP_ACC_CUSTOM Intel® FPGA IP or Floating Point Custom Accumulator Intel® FPGA IP Output Latency 2.3. FP_ACC_CUSTOM Intel® FPGA IP Resource Utilization and Performance 2.4. FP_ACC_CUSTOM Intel® FPGA IP or Floating Point Custom Accumulator Intel® FPGA IP Signals 2.5. FP_ACC_CUSTOM Intel® FPGA IP or Floating Point Custom Accumulator Intel® FPGA IP Parameters
3. ALTFP_ADD_SUB IP Core x
3.1. ALTFP_ADD_SUB Features 3.2. ALTFP_ADD_SUB Output Latency 3.3. ALTFP_ADD_SUB Truth Table 3.4. ALTFP_ADD_SUB Resource Utilization and Performance 3.5. ALTFP_ADD_SUB Design Example: Addition of Double-Precision Format Numbers 3.6. ALTFP_ADD_SUB Signals 3.7. ALTFP_ADD_SUB Parameters
3.5. ALTFP_ADD_SUB Design Example: Addition of Double-Precision Format Numbers x
3.5.1. ALTFP_ADD_SUM Design Example: Understanding the Simulation Results
4. ALTFP_DIV IP Core x
4.1. ALTFP_DIV Features 4.2. ALTFP_DIV Output Latency 4.3. ALTFP_DIV Truth Table 4.4. ALTFP_DIV Resource Utilization and Performance 4.5. ALTFP_DIV Design Example: Division of Single-Precision 4.6. ALTFP_DIV Signals 4.7. ALTFP_DIV Parameters
4.5. ALTFP_DIV Design Example: Division of Single-Precision x
4.5.1. ALTFP_DIV Design Example: Understanding the Simulation Results
5. ALTFP_MULT IP Core x
5.1. ALTFP_MULT IP Core Features 5.2. ALTFP_MULT Output Latency 5.3. ALTFP_MULT Truth Table 5.4. ALTFP_MULT Resource Utilization and Performance 5.5. ALTFP_MULT Design Example: Multiplication of Double-Precision Format Numbers 5.6. Parameters 5.7. ALTFP_MULT Signals
5.5. ALTFP_MULT Design Example: Multiplication of Double-Precision Format Numbers x
5.5.1. ALTFP_MULT Design Example: Understanding the Simulation Waveform
6. ALTFP_SQRT x
6.1. ALTFP_SQRT Features 6.2. Output Latency 6.3. ALTFP_SQRT Truth Table 6.4. ALTFP_SQRT Resource Utilization and Performance 6.5. ALTFP_SQRT Design Example: Square Root of Single-Precision Format Numbers 6.6. ALTFP_SQRT Signals 6.7. ALTFP_SQRT Parameters
6.5. ALTFP_SQRT Design Example: Square Root of Single-Precision Format Numbers x
6.5.1. ALTFP_SQRT Design Example: Understanding the Simulation Results
7. ALTFP_EXP IP Core x
7.1. ALTFP_EXP Features 7.2. Output Latency 7.3. ALTFP_EXP Truth Table 7.4. ALTFP_EXP Resource Utilization and Performance 7.5. ALTFP_EXP Design Example: Exponential of Single-Precision Format Numbers 7.6. ALTFP_EXP Signals 7.7. ALTFP_EXP Parameters
7.5. ALTFP_EXP Design Example: Exponential of Single-Precision Format Numbers x
7.5.1. ALTFP_EXP Design Example: Understanding the Simulation Results
8. ALTFP_INV IP Core x
8.1. ALTFP_INV Features 8.2. Output Latency 8.3. ALTFP_INV Truth Table 8.4. ALTFP_INV Resource Utilization and Performance 8.5. ALTFP_INV Design Example: Inverse of Single-Precision Format Numbers 8.6. Ports 8.7. Parameters
8.5. ALTFP_INV Design Example: Inverse of Single-Precision Format Numbers x
8.5.1. ALTFP_INV Design Example: Understanding the Simulation Results
9. ALTFP_INV_SQRT IP Core x
9.1. ALTFP_INV_SQRT Features 9.2. Output Latency 9.3. ALTFP_INV_SQRT Truth Table 9.4. ALTFP_INV_SQRT Resource Utilization and Performance 9.5. ALTFP_INV_SQRT Design Example: Inverse Square Root of Single-Precision Format Numbers 9.6. Ports 9.7. Parameters
9.5. ALTFP_INV_SQRT Design Example: Inverse Square Root of Single-Precision Format Numbers x
9.5.1. ALTFP_INV_SQRT Design Example: Understanding the Simulation Results
10. ALTFP_LOG x
10.1. ALTFP_LOG Features 10.2. Output Latency 10.3. ALTFP_LOG Truth Table 10.4. ALTFP_LOG Resource Utilization and Performance 10.5. ALTFP_LOG Design Example: Natural Logarithm of Single-Precision Format Numbers 10.6. Signals 10.7. Parameters
10.5. ALTFP_LOG Design Example: Natural Logarithm of Single-Precision Format Numbers x
10.5.1. ALTFP_LOG Design Example: Understanding the Simulation Results
11. ALTFP_ATAN IP Core x
11.1. Output Latency 11.2. ALTFP_ATAN Features 11.3. ALTFP_ATAN Resource Utilization and Performance 11.4. Ports 11.5. ALTFP_ATAN Parameters
12. ALTFP_SINCOS IP Core x
12.1. ALTFP_SINCOS Features 12.2. Output Latency 12.3. ALTFP_SINCOS Resource Utilization and Performance 12.4. ALTFP_SINCOS Signals 12.5. ALTFP_SINCOS Parameters
13. ALTFP_ABS IP Core x
13.1. ALTFP_ABS Features 13.2. ALTFP_ABS Output Latency 13.3. ALTFP_ABS Resource Utilization and Performance 13.4. ALTFP_ABS Design Example: Absolute Value of Multiplication Results 13.5. ALTFP_ABS Signals 13.6. ALTFP_ABS Parameters
13.4. ALTFP_ABS Design Example: Absolute Value of Multiplication Results x
13.4.1. ALTFP_ABS Design Example: Understanding the Simulation Results
14. ALTFP_COMPARE IP Core x
14.1. ALTFP_COMPARE Features 14.2. ALTFP_COMPARE Output Latency 14.3. ALTFP_COMPARE Resource Utilization and Performance 14.4. ALTFP_COMPARE Design Example: Comparison of Single-Precision Format Numbers 14.5. ALTFP_COMPARE Signals 14.6. ALTFP_COMPARE Parameters
14.4. ALTFP_COMPARE Design Example: Comparison of Single-Precision Format Numbers x
14.4.1. ALTFP_COMPARE Design Example: Understanding the Simulation Results
15. ALTFP_CONVERT IP Core x
15.1. ALTFP_CONVERT Features 15.2. ALTFP_CONVERT Conversion Operations 15.3. ALTFP_CONVERT Output Latency 15.4. ALTFP_CONVERT Resource Utilization and Performance 15.5. ALTFP_CONVERT Design Example: Convert Double-Precision Floating-Point Format Numbers 15.6. ALTFP_CONVERT Signals 15.7. ALTFP_CONVERT Parameters
15.5. ALTFP_CONVERT Design Example: Convert Double-Precision Floating-Point Format Numbers x
15.5.1. ALTFP_CONVERT Design Example: Understanding the Simulation Results
16. FP_FUNCTIONS Intel® FPGA IP or Floating Point Functions Intel® FPGA IP Core x
16.1. FP_FUNCTIONS Intel® FPGA IP or Floating Point Functions Intel® FPGA IP Features 16.2. FP_FUNCTIONS Intel® FPGA IP or Floating Point Functions Intel® FPGA IP Output Latency 16.3. FP_FUNCTIONS Intel® FPGA IP or Floating Point Functions Intel® FPGA IP Target Frequency 16.4. FP_FUNCTIONS Intel® FPGA IP or Floating Point Functions Intel® FPGA IP Combined Target 16.5. FP_FUNCTIONS Intel® FPGA IP Resource Utilization and Performance 16.6. FP_FUNCTIONS Intel® FPGA IP Signals 16.7. FP_FUNCTIONS Intel® FPGA IP Parameters
1. About Floating-Point IP Cores
2. FP_ACC_CUSTOM Intel® FPGA IP or Floating Point Custom Accumulator Intel® FPGA IP Core
3. ALTFP_ADD_SUB IP Core
4. ALTFP_DIV IP Core
5. ALTFP_MULT IP Core
6. ALTFP_SQRT
7. ALTFP_EXP IP Core
8. ALTFP_INV IP Core
9. ALTFP_INV_SQRT IP Core
10. ALTFP_LOG
11. ALTFP_ATAN IP Core
12. ALTFP_SINCOS IP Core
13. ALTFP_ABS IP Core
14. ALTFP_COMPARE IP Core
15. ALTFP_CONVERT IP Core
16. FP_FUNCTIONS Intel® FPGA IP or Floating Point Functions Intel® FPGA IP Core
17. Floating-Point IP Cores User Guide Document Archives
18. Document Revision History for the Floating-Point IP Cores User Guide

16. FP_FUNCTIONS Intel® FPGA IP or Floating Point Functions Intel® FPGA IP Core

This IP core replaces all the functions supported by the existing floating point IP cores shown in the previous chapters in this document for devices in the Intel® Quartus® Prime Pro Edition software.
Table 91.  Floating Point Functions Intel® FPGA IP Release Information
Item Description
Version 19.1
Intel® Quartus® Prime Version 20.1
Release Date 2020.04.13
Table 92.  List of Functions Supported by FP_FUNCTIONS Intel® FPGA IP or Floating Point Functions Intel® FPGA IP
Function Description
Arithmetic
Add Two input addition
Sub Two input subtraction
Add/Sub Two input addition and or subtraction supporting two configurations. By default, the IP core computes both the sum (output port q) and the difference (output port s) of the two inputs. You may also select to generate an IP core that provides a single shared output for both the sum and the difference of inputs. In this configuration an additional input port (opSel) allows you to select the desired operation at run-time. When opSel is low (0), the IP core computes the sum of the two inputs. When opSel is high (1), it computes their difference. Enable this configuration by turning on Use Select Signal.
Multiply Two input multiplication
Divide Two input division
Reciprocal

Performs the function of 1/a where a is the input.

Note: This function replaces the ALTFP_INV IP core in Intel® Arria® 10 devices.
Absolute Generates absolute value of the input
Scalar Product Performs the scalar product between two vectors with the dimensions that you set
Multiply-Accumulate Two input multiplication followed by a single cycle accumulation
Accumulate Perform single input accumulation in a single cycle
Multiply-Add Performs two input multiplication followed by addition
Complex-Multiply Performs multiplication of two complex values
Roots
Square Root Performs square root to the input value
Reciprocal Square Root

Performs the function of 1/√a where a is the input

Note: This function replaces the ALTFP_INV_SQRT IP core in Intel® Arria® 10 devices.
Cube Root Performs cube root to the input value
3D Hypotenuse Performs the function of Q=√(a^2+b^2+c^2)
Conversions
Fixed-Point to Floating-Point Converts a fixed point input to floating point representation
Floating-Point to Fixed-Point Converts a floating-point input to fixed point representation
Floating to Floating Point Converts a floating-point input to floating-point representation of a different precision
Comparisons
Minimum Compares and produces the smallest value of two inputs
Maximum Compares and produces the biggest value of two inputs
Less Than Compares and returns true if input a is less than input b
Less Than or Equal Compares and returns true if input a is less than or equal to input b
Equal Compares and returns true if input a is equal to input b
Greater Than Compares and returns true if input a is greater than input b
Greater Than or Equal Compares and returns true if input a is greater than or equal to input b
Not Equal Compares and returns true if input a is not equal to input b
Exp/Log/Pow
Exponent Performs the function of ea where a is the input
Exponent base 2 Performs the function of 2a where a is the input
Exponent base 10 Performs the function of 10a where a is the input
Log Performs the function of loge(a) where a is the input
Log2 Performs the function of log2(a) where a is the input
Log10 Performs the function of log10(a) where a is the input
Log(1+x) Performs the function of loge(1+a) where a is the input
Power  
LdExp Sets the exponential value of a floating-point input Performs the function a * 2^b where a is a floating-point input and b is an integer input. You specify both the format of input a and the width of input b
Trigonometry
Sin Performs sine function of a single input
Cos Performs cosine function of a single input
Tan Performs tangent function of a single input
Arcsin Performs arc sine function of a single input
Arccos Performs arc cosine function of a single input
Arctan Performs arc tangent function of a single input
Arctan2 Performs the function of arctan (b/a) where a and b are the inputs

Section Content
FP_FUNCTIONS Intel FPGA IP or Floating Point Functions Intel FPGA IP Features
FP_FUNCTIONS Intel FPGA IP or Floating Point Functions Intel FPGA IP Output Latency
FP_FUNCTIONS Intel FPGA IP or Floating Point Functions Intel FPGA IP Target Frequency
FP_FUNCTIONS Intel FPGA IP or Floating Point Functions Intel FPGA IP Combined Target
FP_FUNCTIONS Intel FPGA IP Resource Utilization and Performance
FP_FUNCTIONS Intel FPGA IP Signals
FP_FUNCTIONS Intel FPGA IP Parameters

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