Storage Configuration - 2025.1 English - UG1702

Sets the global default options for the HLS micro-architecture binding of FIFO storage elements to memory resources.

The default configuration defined by syn.storage for FIFO storage can be overridden by syn.directive.bind_storage for a specific design element, or specifying the storage_type option for syn.directive.interface for objects on the interface.

syn.storage

The syntax for the syn.storage command is as follows:

syn.storage=fifo impl=auto auto_srl_max_bits=512 auto_srl_max_depth=3

• syn.storage=fifo: Starts the command to configure FIFOs.
  Note: FIFO is the only type supported at this time.
• impl=<value>: Specifies the implementation (impl) keyword followed by the value. When impl is not specified, the default is auto, allowing the tool to determine the best implementation for a given operator. Supported values include: auto, bram, lutram, uram, memory, srl
• auto_srl_max_bits=<value>: Only valid when for impl:auto (the default). Specifies the maximum allowed SRL total bits (depth * width) for auto implementations. The default is 1024.
• auto_srl_max_depth=<value>: Specifies the maximum allowed SRL depth for auto-srl implementation. The default is 2.