Intel FPGA Integer Arithmetic IP Cores User Guide

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Date 10/05/2020
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Document Table of Contents
Document Table of Contents x
1. Intel FPGA Integer Arithmetic IP Cores 2. LPM_COUNTER (Counter) IP Core 3. LPM_DIVIDE (Divider) Intel FPGA IP Core 4. LPM_MULT (Multiplier) IP Core 5. LPM_ADD_SUB (Adder/Subtractor) 6. LPM_COMPARE (Comparator) 7. ALTECC (Error Correction Code: Encoder/Decoder) IP Core 8. Intel FPGA Multiply Adder IP Core 9. ALTMEMMULT (Memory-based Constant Coefficient Multiplier) IP Core 10. ALTMULT_ACCUM (Multiply-Accumulate) IP Core 11. ALTMULT_ADD (Multiply-Adder) IP Core 12. ALTMULT_COMPLEX (Complex Multiplier) IP Core 13. ALTSQRT (Integer Square Root) IP Core 14. PARALLEL_ADD (Parallel Adder) IP Core 15. Integer Arithmetic IP Cores User Guide Document Archives 16. Document Revision History for Intel FPGA Integer Arithmetic IP Cores User Guide
2. LPM_COUNTER (Counter) IP Core x
2.1. Features 2.2. Verilog HDL Prototype 2.3. VHDL Component Declaration 2.4. VHDL LIBRARY_USE Declaration 2.5. Ports 2.6. Parameters
3. LPM_DIVIDE (Divider) Intel FPGA IP Core x
3.1. Features 3.2. Verilog HDL Prototype 3.3. VHDL Component Declaration 3.4. VHDL LIBRARY_USE Declaration 3.5. Ports 3.6. Parameters
4. LPM_MULT (Multiplier) IP Core x
4.1. Features 4.2. Verilog HDL Prototype 4.3. VHDL Component Declaration 4.4. VHDL LIBRARY_USE Declaration 4.5. Signals 4.6. Parameters for Stratix V, Arria V, Cyclone V, and Intel® Cyclone® 10 LP Devices 4.7. Parameters for Intel® Stratix® 10, Intel® Arria® 10, and Intel® Cyclone® 10 GX Devices
4.6. Parameters for Stratix V, Arria V, Cyclone V, and Intel® Cyclone® 10 LP Devices x
4.6.1. General Tab 4.6.2. General 2 Tab 4.6.3. Pipelining Tab
4.7. Parameters for Intel® Stratix® 10, Intel® Arria® 10, and Intel® Cyclone® 10 GX Devices x
4.7.1. General Tab 4.7.2. General 2 Tab 4.7.3. Pipelining
5. LPM_ADD_SUB (Adder/Subtractor) x
5.1. Features 5.2. Verilog HDL Prototype 5.3. VHDL Component Declaration 5.4. VHDL LIBRARY_USE Declaration 5.5. Ports 5.6. Parameters
6. LPM_COMPARE (Comparator) x
6.1. Features 6.2. Verilog HDL Prototype 6.3. VHDL Component Declaration 6.4. VHDL LIBRARY_USE Declaration 6.5. Ports 6.6. Parameters
7. ALTECC (Error Correction Code: Encoder/Decoder) IP Core x
7.1. ALTECC Encoder Features 7.2. Verilog HDL Prototype (ALTECC_ENCODER) 7.3. Verilog HDL Prototype (ALTECC_DECODER) 7.4. VHDL Component Declaration (ALTECC_ENCODER) 7.5. VHDL Component Declaration (ALTECC_DECODER) 7.6. VHDL LIBRARY_USE Declaration 7.7. Encoder Ports 7.8. Decoder Ports 7.9. Encoder Parameters 7.10. Decoder Parameters
8. Intel FPGA Multiply Adder IP Core x
8.1. Features 8.2. Verilog HDL Prototype 8.3. VHDL Component Declaration 8.4. VHDL LIBRARY_USE Declaration 8.5. Signals 8.6. Parameters
8.1. Features x
8.1.1. Pre-adder 8.1.2. Systolic Delay Register 8.1.3. Pre-load Constant 8.1.4. Double Accumulator
8.1.1. Pre-adder x
8.1.1.1. Pre-adder Simple Mode 8.1.1.2. Pre-adder Coefficient Mode 8.1.1.3. Pre-adder Input Mode 8.1.1.4. Pre-adder Square Mode 8.1.1.5. Pre-adder Constant Mode
8.6. Parameters x
8.6.1. General Tab 8.6.2. Extra Modes Tab 8.6.3. Multipliers Tab 8.6.4. Preadder Tab 8.6.5. Accumulator Tab 8.6.6. Systolic/Chainout Tab 8.6.7. Pipelining Tab
9. ALTMEMMULT (Memory-based Constant Coefficient Multiplier) IP Core x
9.1. Features 9.2. Verilog HDL Prototype 9.3. VHDL Component Declaration 9.4. Ports 9.5. Parameters
10. ALTMULT_ACCUM (Multiply-Accumulate) IP Core x
10.1. Features 10.2. Verilog HDL Prototype 10.3. VHDL Component Declaration 10.4. VHDL LIBRARY_USE Declaration 10.5. Ports 10.6. Parameters
11. ALTMULT_ADD (Multiply-Adder) IP Core x
11.1. Features 11.2. Verilog HDL Prototype 11.3. VHDL Component Declaration 11.4. VHDL LIBRARY_USE Declaration 11.5. Ports 11.6. Parameters
12. ALTMULT_COMPLEX (Complex Multiplier) IP Core x
12.1. Complex Multiplication 12.2. Canonical Representation 12.3. Conventional Representation 12.4. Features 12.5. Verilog HDL Prototype 12.6. VHDL Component Declaration 12.7. VHDL LIBRARY_USE Declaration 12.8. Signals 12.9. Parameters
13. ALTSQRT (Integer Square Root) IP Core x
13.1. Features 13.2. Verilog HDL Prototype 13.3. VHDL Component Declaration 13.4. VHDL LIBRARY_USE Declaration 13.5. Ports 13.6. Parameters
14. PARALLEL_ADD (Parallel Adder) IP Core x
14.1. Feature 14.2. Verilog HDL Prototype 14.3. VHDL Component Declaration 14.4. VHDL LIBRARY_USE Declaration 14.5. Ports 14.6. Parameters
1. Intel FPGA Integer Arithmetic IP Cores
2. LPM_COUNTER (Counter) IP Core
3. LPM_DIVIDE (Divider) Intel FPGA IP Core
4. LPM_MULT (Multiplier) IP Core
5. LPM_ADD_SUB (Adder/Subtractor)
6. LPM_COMPARE (Comparator)
7. ALTECC (Error Correction Code: Encoder/Decoder) IP Core
8. Intel FPGA Multiply Adder IP Core
9. ALTMEMMULT (Memory-based Constant Coefficient Multiplier) IP Core
10. ALTMULT_ACCUM (Multiply-Accumulate) IP Core
11. ALTMULT_ADD (Multiply-Adder) IP Core
12. ALTMULT_COMPLEX (Complex Multiplier) IP Core
13. ALTSQRT (Integer Square Root) IP Core
14. PARALLEL_ADD (Parallel Adder) IP Core
15. Integer Arithmetic IP Cores User Guide Document Archives
16. Document Revision History for Intel FPGA Integer Arithmetic IP Cores User Guide

10.6. Parameters

The following table lists the parameters for the ALTMULT_ACCUM IP core.

Table 44.  ALTMULT_ACCUM Parameters
Parameter Name Type Required Description
ACCUM_DIRECTION String No Specifies whether the accumulator performs an add or subtract function. Values are ADD and SUB. When this parameter is set to ADD, the accumulator adds the product to the current accumulator value. When this parameter is set to SUB, the accumulator subtracts the product from the current accumulator value. If omitted the default value is ADD. This parameter is ignored if the addnsub port is used.
ACCUM_SLOAD_ACLR String No Specifies the asynchronous clear signal for the accum_sload port. Values are ACLR0, ACLR1, ACLR2, and ACLR3. If omitted the default value is ACLR3. This parameter is ignored if the accum_sload port is unused.
ACCUM_SLOAD_PIPELINE_ACLR String No Specifies the asynchronous clear signal for the second register on the accum_sload port. Values are ACLR0, ACLR1, ACLR2, and ACLR3. If omitted the default value is ACLR3. This parameter is ignored if the accum_sload port is unused.
ACCUM_SLOAD_PIPELINE_REG String No Specifies the clock signal for the second register on the accum_sload port. Values are UNREGISTERED, CLOCK0, CLOCK1, CLOCK2, and CLOCK3. If omitted, the default value is CLOCK0. This parameter is ignored if the accum_sload port is unused.
ACCUM_SLOAD_REG String No Specifies the clock signal for the accum_sload port. Values are UNREGISTERED, CLOCK0, CLOCK1, CLOCK2, and CLOCK3. If omitted, the default value is CLOCK0. This parameter is ignored if the accum_sload port is unused.
ADDNSUB_ACLR String No Specifies the asynchronous clear for the addnsub port. Values are ACLR0, ACLR1, ACLR2, and ACLR3. If omitted the default value is ACLR0. This parameter is ignored if the addnsub port is unused.
ADDNSUB_PIPELINE_ACLR String No Specifies the asynchronous clear for the second register on the addnsub port. Values are ACLR0, ACLR1, ACLR2, and ACLR3. If omitted the default value is ACLR0. This parameter is ignored if the addnsub port is unused.
ADDNSUB_PIPELINE_REG String No Specifies the clock for the second register on the addnsub port. Values are UNREGISTERED, CLOCK0, CLOCK1, CLOCK2, and CLOCK3. If omitted, the default value is CLOCK0. This parameter is ignored if the addnsub port is unused.
ADDNSUB_REG String No Specifies the clock for the addnsub port. Values are UNREGISTERED, CLOCK0, CLOCK1, CLOCK2, and CLOCK3. If omitted, the default value is CLOCK0. This parameter is ignored if the addnsub port is unused.
DSP_BLOCK_BALANCING String No Specifies whether to use DSP block balancing. Values are UNUSED, Auto, DSP blocks, Logic Elements, Off, Simple 18-bit Multipliers, Simple Multipliers, and Width 18-bit Multipliers.
EXTRA_ACCUMULATOR_LATENCY String No Adds the number of clock cycles of latency specified by the OUTPUT_REG parameter to the accumulator portion of the DSP block.
EXTRA_MULTIPLIER_LATENCY Integer No Specifies the number of clock cycles of latency for the multiplier portion of the DSP block. If the MULTIPLIER_REG parameter is specified, then the specified clock port is used to add the latency. If the MULTIPLIER_REG parameter is set to UNREGISTERED, then the clock0 port is used to add the latency.
INPUT_ACLR_A String No Specifies the asynchronous clear port for the dataa[] port. Values are ACLR0, ACLR1, ACLR2, and ACLR3. If omitted the default value is ACLR3.
INPUT_ACLR_B String No Specifies the asynchronous clear port for the datab[] port. Values are ACLR0, ACLR1, ACLR2, and ACLR3. If omitted the default value is ACLR3.
INPUT_REG_A String No Specifies the clock port for the dataa[] port. Values are UNREGISTERED, CLOCK0, CLOCK1, CLOCK2, and CLOCK3. If omitted, the default value is CLOCK0.
INPUT_REG_B String No Specifies the clock port for the datab[] port. Values are UNREGISTERED, CLOCK0, CLOCK1, and CLOCK2. If omitted, the default value is CLOCK0.
INTENDED_DEVICE_FAMILY String No This parameter is used for modeling and behavioral simulation purposes. The parameter editor calculates the value for this parameter.
LPM_HINT String No

When you instantiate a library of parameterized modules (LPM) function in a VHDL Design File (.vhd), you must use the LPM_HINT parameter to specify an Intel® -specific parameter. For example: LPM_HINT = "CHAIN_SIZE = 8, ONE_INPUT_IS_CONSTANT = YES"

The default value is UNUSED.
LPM_TYPE String No Identifies the library of parameterized modules (LPM) entity name in VHDL design files.
MULTIPLIER_ACLR String No Specifies the asynchronous clear signal for the register immediately following the multiplier. Values are ACLR0, ACLR1, ACLR2, and ACLR3. If omitted the default value is ACLR3.
MULTIPLIER_REG String No Specifies the clock signal for the register that immediately follows the multiplier. Values are UNREGISTERED, CLOCK0, CLOCK1, CLOCK2, and CLOCK3. If omitted, the default value is CLOCK0.
OUTPUT_ACLR String No Specifies the asynchronous clear signal for the registers on the outputs. Values are ACLR0, ACLR1, ACLR2, and ACLR3. If omitted the default value is ACLR3.
OUTPUT_REG String No Specifies the clock signal for the registers on the outputs. Values are CLOCK0, CLOCK1, CLOCK2, and CLOCK3. If omitted the default value is CLOCK0.

You must enable the output registers in order to use accumulator.

PORT_ADDNSUB String No Specifies the usage of the addnsub input port. Values are: PORT_USED , PORT_UNUSED, and PORT_CONNECTIVITY (port usage is determined by checking the port connectivity.) If omitted the default value is PORT_CONNECTIVITY.
PORT_SIGNA String No Specifies the usage of the signa input port. Values are PORT_USED, PORT_UNUSED, and PORT_CONNECTIVITY. If omitted the default value is PORT_CONNECTIVITY.
PORT_SIGNB String No Specifies the usage of the signb input port. Values are PORT_USED, PORT_UNUSED, and PORT_CONNECTIVITY. If omitted the default value is PORT_CONNECTIVITY.
REPRESENTATION_[] String No Parameter [A,B]. Specifies the numerical representation of the corresponding data[] port. Values are UNSIGNED and SIGNED. When this parameter is set to SIGNED, the accumulator interprets the dataa input as signed two's complement. If omitted, the default value is UNSIGNED. This parameter is ignored if the signa port is used.
SIGN_ACLR_[] String No Parameter [A,B]. Specifies the asynchronous clear signal for the first register on the corresponding sign[] port. Values are ACLR0, ACLR1, ACLR2, and ACLR3. If omitted the default value is ACLR3. This parameter is ignored if the corresponding sign[] port is unused.
SIGN_PIPELINE_ACLR_[] String No Parameter [A,B]. Specifies the asynchronous clear signal for the second register on the corresponding sign[] port. Values are ACLR0, ACLR1, ACLR2, and ACLR3. If omitted the default value is ACLR3. This parameter is ignored if the corresponding sign[] port is unused.
SIGN_PIPELINE_REG_[] String No Parameter [A,B]. Specifies the clock signal for the second register on the corresponding sign[] port. Values are UNREGISTERED, CLOCK0, CLOCK1, CLOCK2, and CLOCK3. If omitted, the default value is CLOCK0. This parameter is ignored if the corresponding sign[] port is unused.
SIGN_REG_[] String No Parameter [A,B]. Specifies the clock signal for the first register on the corresponding sign[] port. Values are UNREGISTERED, CLOCK0, CLOCK1, CLOCK2, and CLOCK3. If omitted, the default value is CLOCK0. This parameter is ignored if the corresponding sign[] port is unused.
WIDTH_A Integer Yes Specifies the width of the dataa[] port.
WIDTH_B Integer Yes Specifies the width of the datab[] port.
WIDTH_RESULT Integer No Specifies the width of the result[] port.
Table 45.  ALTMULT_ACCUM Parameters (HardCopy Devices Only)
Parameter Name Type Required Description
DEDICATED_MULTIPLIER_CIRCUITRY String No Specifies whether to use dedicated multiplier circuitry. Values are AUTO, ON, and OFF. If omitted, the default value is AUTO.
Table 46.  ALTMULT_ACCUM Parameters (Stratix IV, Arria GX, and HardCopy Devices Only)
Parameter Name Type Required Description
MULTIPLIER_SATURATION String No Specifies multiplier saturation. Values are NO, YES, and VARIABLE. If omitted the default value is NO.
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