High-Level Synthesis: from Algorithm to Digital Circuit. High Level Synthesis Tool Synthagate 2019-03-05

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High Level Synthesis Tool Synthagate

High-Level Synthesis: from Algorithm to Digital Circuit

First, the timing infor- mation about the cells in the target process technology library are used as an input to the high-level synthesis process. This lets the same ports and binding functions to be used for port-to-port binding in a hierarchical design. Third, Cynthesizer uses this detailed timing information when it schedules the operations of the algorithm to ensure that no combinatorial path in use exceeds the clock period. Note again, this is done without any need to recode the algorithm. By default, without any scheduling constraints, Cynthesizer will optimize for area, taking as many cycles as necessary to complete the computation with a minimal set of functional units. No guarantees of any cycle-by-cycle timing are made in this unconstrained code, although the order of operations determined by the dependency relationships within the code is maintained. No additional tool needs to be purchased.

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High Level Synthesis Tool Synthagate

High-Level Synthesis: from Algorithm to Digital Circuit

Meredith { bind c ; } }; Note that the addition of these functions allows the binding to be done using the conventional SystemC port binding syntax: socket. High-level synthesis has to meet the same challenge to be practical for wide deployment. In reality, more than one operation will often be chained within a single clock cycle depending on the rela- tionships between the required latency, the clock period, the propagation delay through the adders and multipliers and their relative sizes. By pipelining the design, we are able to achieve a throughput of two values every eight cycles without using any addi- tional multipliers or adders. This would result in the following schedule.

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High Level Synthesis: from Algorithm to Digital Circuit

High-Level Synthesis: from Algorithm to Digital Circuit

For example, consider the following design which reads in six data values and outputs a computed result. This is a 50% increase in throughput with no increase in computing resources. Functional unit library compilation is performed in advance of high-level synthe- sis once per process technology and clock period to speed the synthesis process. The complete structural hierarchy can be simulated at a behavioral level, accurately representing the concurrency of all the modules and threads, and accu- rately verifying the pin-level communication protocols between them. Cynthesizer achieves this by combining a number of steps. These include loops with non-constant bounds, where the loop termination condition depends on the state of the design and the input data, as well as simple for-loops with constant bounds. These include non-square parts i.

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High Level Synthesis: from Algorithm to Digital Circuit

High-Level Synthesis: from Algorithm to Digital Circuit

These controls can be used to make downstream timing closure even easier, thereby reducing processing time in downstream tools such as logic synthesis. Here is an example of a hierarchical design using modular interfaces as described previously. In this case there will be at least one cycle per iteration of the loop. This produces an overall throughput of one value per six cycles. All the tools needed for library compilation to be performed by the user are included with Cynthesizer. This information is read in a Liberty format.

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High Level Synthesis Tool Synthagate

High-Level Synthesis: from Algorithm to Digital Circuit

Individual sub-modules can be assigned to different team members if desired supporting a conventional team structure and concurrent design approach. For instance, if the clock cycle were long enough, and the target process technology were fast enough the design could be scheduled in a single cycle using four adders and two multipliers. Cynthesizer also creates custom functional units as needed during high-level syn- thesis. Second, Cynthesizer has advanced datapath optimization technology that it uses to build a library of gate-level functional units such as adders, multipliers, mul- tiplexors, etc based on the cells available in the target technology. The user is allowed to specify a minimum and maximum latency to be achieved. This will introduce the minimum parallelism with the one instance of the needed hardware being used over and over for each iteration of the loop.

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High Level Synthesis Tool Synthagate

High-Level Synthesis: from Algorithm to Digital Circuit

Note that while the protocol can be written in-line as it is shown here, protocols are typically encapsulated into modular interface classes for Xem thêm: , ,. Note that while the protocol can be written in-line as it is shown here, protocols are typically encapsulated into modular interface classes for ease-of-use and for ease-of-reuse. . This gives the user the ability to control the latency and throughput of the result- ing circuit without performing detailed resource assignment and scheduling by hand. This ensures that the timing assumptions made during high-level synthesis are maintained during logic synthesis. For instance, the data value must be presented on the data bus in the same cycle as the data valid line is driven to true.

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High Level Synthesis: from Algorithm to Digital Circuit

High-Level Synthesis: from Algorithm to Digital Circuit

These copies can operate in parallel, performing the computation of several iterations of the loop at the same time. . . . . . .

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High Level Synthesis Tool Synthagate

High-Level Synthesis: from Algorithm to Digital Circuit

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