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- 3.4. Listing the Intel® FPGA SDK for OpenCL™ Offline Compiler Command Options (no argument, -help, or -h)
- 7.5. Specifying the Name of an Intel® FPGA SDK for OpenCL™ Offline Compiler Output File (-o <filename>)
- 7.6. Compiling a Kernel for a Specific FPGA Board and Custom Platform (-board=<board_name>) and (-board-package=<board_package_path>)
- 7.13. Converting Warning Messages from the Intel® FPGA SDK for OpenCL™ Offline Compiler into Error Messages (-Werror)
- 7.17. Forcing a Single Store Ring to Reduce Area at the Expense of Write Throughput to Global Memory (-force-single-store-ring)
- 7.18. Forcing Fewer Read Data Reorder Units to Reduce Area at the Expense of Read Throughput to Global Memory (-num-reorder)
126.96.36.199. Overview: Intel FPGA SDK for OpenCL Pipeline Approach
Assume each level of operation is one stage in the pipeline. At each stage, the Intel® FPGA SDK for OpenCL™ Offline Compiler executes all operations in parallel by the thread existing at that stage. For example, thread 2 executes Load A, Load B, and copies the current global ID (via gid) to the next pipeline stage. Similar to the pipelined execution on instructions in reduced instruction set computing (RISC) processors, the SDK's pipeline stages also execute in parallel. The threads advances to the next pipeline stage only after all the stages have completed execution.
Some operations are capable of stalling the Intel FPGA SDK for OpenCL pipeline. Examples of such operations include variable latency operations like memory load and store operations. To support stalls, ready and valid signals need to propagate throughout the pipeline so that the offline compiler can schedule the pipeline stages. However, ready signals are not necessary if all operations have fixed latency. In these cases, the offline compiler optimizes the pipeline to statically schedule the operations, which significantly reduces the logic necessary for pipeline implementation.
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