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vendor._xilinx: fix FFSynchronizer with custom shapes. [0.5 backport] #1554

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Merged
merged 1 commit into from
Jan 25, 2025
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vendor._xilinx: fix FFSynchronizer with custom shapes. [0.5 backport] #1554

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4 changes: 2 additions & 2 deletions amaranth/vendor/_xilinx.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1240,9 +1240,9 @@ def get_ff_sync(self, ff_sync):
for index in range(ff_sync._stages)]
if self.toolchain == "Vivado":
if ff_sync._max_input_delay is None:
flops[0].attrs["amaranth.vivado.false_path"] = "TRUE"
Value.cast(flops[0]).attrs["amaranth.vivado.false_path"] = "TRUE"
else:
flops[0].attrs["amaranth.vivado.max_delay"] = str(ff_sync._max_input_delay * 1e9)
Value.cast(flops[0]).attrs["amaranth.vivado.max_delay"] = str(ff_sync._max_input_delay * 1e9)
elif ff_sync._max_input_delay is not None:
raise NotImplementedError("Platform '{}' does not support constraining input delay "
"for FFSynchronizer"
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