Intel® Arria® 10 Core Fabric and General Purpose I/Os Handbook

ID 683461
Date 1/21/2022
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3.1. Supported Operational Modes in Intel® Arria® 10 Devices

Table 14.  Supported Combinations of Operational Modes and Features for Variable Precision DSP Block in Intel® Arria® 10 Devices
Variable-Precision DSP Block Resource Operation Mode Supported Operation Instance Pre-Adder Support Coefficient Support Input Cascade Support Chainin Support Chainout Support
1 variable precision DSP block Fixed-point independent 18 x 19 multiplication 2 Yes Yes Yes 2 No No
Fixed-point independent 27 x 27 multiplication 1 Yes Yes Yes 3 Yes Yes
Fixed-point two 18 x 19 multiplier adder mode 1 Yes Yes Yes2 Yes Yes
Fixed-point 18 x 18 multiplier adder summed with 36-bit input 1 No No No Yes Yes
Fixed-point 18 x 19 systolic mode 1 Yes Yes Yes2 Yes Yes
1 variable precision DSP block Floating-point multiplication mode 1 No No No No Yes
Floating-point adder or subtract mode 1 No No No No Yes
Floating-point multiplier adder or subtract mode 1 No No No Yes Yes
Floating-point multiplier accumulate mode 1 No No No No Yes
Floating-point vector one mode 1 No No No Yes Yes
Floating-point vector two mode 1 No No No Yes Yes
2 Variable precision DSP blocks Complex 18x19 multiplication 1 No No Yes No No
Table 15.  Supported Combinations of Operational Modes and Dynamic Control Features for Variable Precision DSP Blocks in Intel® Arria® 10 Devices
Variable-Precision DSP Block Resource Operation Mode Dynamic ACCUMULATE Dynamic LOADCONST Dynamic SUB Dynamic NEGATE
1 variable precision DSP block Fixed-point independent 18 x 19 multiplication No No No No
Fixed-point independent 27 x 27 multiplication Yes Yes No Yes
Fixed-point two 18 x 19 multiplier adder mode Yes Yes Yes Yes
Fixed-point 18 x 18 multiplier adder summed with 36-bit input Yes Yes Yes Yes
Fixed-point 18 x 19 systolic mode Yes Yes Yes Yes
Floating-point multiplication mode No No No No
Floating-point adder or subtract mode No No No No
Floating-point multiplier adder or subtract mode No No No No
Floating-point multiplier accumulate mode Yes No No No
Floating-point vector one mode No No No No
Floating-point vector two mode No No No No
2 variable precision DSP blocks Complex 18 x 19 multiplication No No No No
2 Each of the two inputs to a pre-adder has a maximum width of 18-bit. When the input cascade is used to feed one of the pre-adder inputs, the maximum width for the input cascade is 18-bit.
3 When you enable the pre-adder feature, the input cascade support is not available.