Storage Configuration - Storage Configuration - 2026.1 English - UG1399

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

You can override the default configuration defined by syn.storage for FIFO storage by syn.directive.bind_storage for a specific design element. You can also override the default configuration by specifying the storage_type option for syn.directive.interface for objects on the interface.

syn.storage

See the following for the syntax of the syn.storage command.

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 . The default value allows the Vitis tool to determine the best implementation for a given operator. The option supports auto , bram , lutram , uram , memory , and srl values.
• 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.