Intel® Hyperflex™ Architecture High-Performance Design Handbook

ID 683353
Date 10/04/2021

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Document Table of Contents Example for Hold Optimization

For some designs, the Register column indicates unusable (hold). This data implies that you cannot use this register location because the location does not meet hold time requirements. The Compiler cannot retime (forward or backward) the registers that occur before or after the register that indicates unusable (hold).