If the function is pipelined, or if the top-level loop is pipelined with the -rewind option, an additional output port ap_ready is created to indicate when new inputs can be applied.
If inputs can be continuously streamed, ap_ready is no longer necessary and will be optimized out.
In Vivado HLS 2012.3 and later, ap_ready will always be generated except in the following conditions:
In Vivado HLS 2012.2 and before, ap_ready will be generated in the following scenarios:
Notes:
Vivado HLS generates ap_ready only when it can be pipelined.
If users try to apply a pipeline directive to a non-pipelinable design, ap_ready is not generated.
Answer Number | Answer Title | Version Found | Version Resolved |
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47431 | Xilinx Vivado HLS Solution Center - Design Assistant | N/A | N/A |
AR# 47509 | |
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Date | 06/25/2014 |
Status | Active |
Type | Solution Center |
Tools |