Intel ® Agilex ™ Variable Precision Dsp Blocks Overview; Features - Intel Agilex User Manual

UG-20213 | 2019.04.02
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1. Intel Agilex
The variable precision digital signal processing (DSP) blocks in Intel
can support fixed-point arithmetic, single-precision, and half-precision floating-point
arithmetic operations. The Intel Agilex DSP blocks provide high design flexibility and
are optimized to support high-performance DSP applications.

1.1. Features

The Intel Agilex fixed-point arithmetic features include:
• High-performance, power-optimized, and fully registered multiplication operations
• 9-bit, 18-bit, and 27-bit word lengths
• Two 18 x 19 multipliers or one 27 x 27 multiplier per DSP block
• Built-in addition, subtraction, and 64-bit double accumulation register to combine
multiplication results
• Cascading 19-bit or 27-bit and cascading 18-bit when pre-adder is used to form
the tap-delay line for filtering applications
• Cascading 64-bit output bus to propagate output results from one block to the
next block without external logic support
• Hard pre-adder supported in 18-bit and 27-bit DSP operation modes for symmetric
filters
• Internal coefficient register bank in both 18-bit and 27-bit modes for filter
implementation
• 18-bit and 27-bit systolic finite impulse response (FIR) filters with distributed
output adder
• Biased rounding support
• Dynamically enable and disable scanin and chainout features
The Intel Agilex floating-point arithmetic is a completely hardened architecture.
Features for floating-point arithmetic include :
• Single-precision (32-bit arithmetic) and half-precision (16-bit arithmetic) modes
• Operational mode for flushed, extended, and bfloat16 floating-point format
• Multiplication, addition, subtraction, multiply-add, and multiply-subtract
• Multiplication with accumulation capability and a dynamic accumulator reset
control
• Multiplication with cascade summation and subtraction capability
• Complex multiplication
• Direct vector dot product
• Systolic vector dot product
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Quartus and Stratix words and logos are trademarks of Intel Corporation or its subsidiaries in the U.S. and/or
other countries. Intel warrants performance of its FPGA and semiconductor products to current specifications in
accordance with Intel's standard warranty, but reserves the right to make changes to any products and services
at any time without notice. Intel assumes no responsibility or liability arising out of the application or use of any
information, product, or service described herein except as expressly agreed to in writing by Intel. Intel
customers are advised to obtain the latest version of device specifications before relying on any published
information and before placing orders for products or services.
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Variable Precision DSP Blocks Overview
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