36 lines
1.3 KiB
Python
36 lines
1.3 KiB
Python
import re
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from typing import TYPE_CHECKING
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if TYPE_CHECKING:
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from systemrdl.node import Node, SignalNode
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from typing import Optional
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from .dereferencer import Dereferencer
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def get_indexed_path(top_node: 'Node', target_node: 'Node') -> str:
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"""
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TODO: Add words about indexing and why i'm doing this. Copy from logbook
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"""
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path = target_node.get_rel_path(top_node, empty_array_suffix="[!]")
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# replace unknown indexes with incrementing iterators i0, i1, ...
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class repl:
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def __init__(self):
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self.i = 0
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def __call__(self, match):
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s = f'i{self.i}'
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self.i += 1
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return s
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return re.sub(r'!', repl(), path)
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def get_always_ff_event(dereferencer: 'Dereferencer', resetsignal: 'Optional[SignalNode]') -> str:
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if resetsignal is None:
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return "@(posedge clk)"
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if resetsignal.get_property('async') and resetsignal.get_property('activehigh'):
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return f"@(posedge clk or posedge {dereferencer.get_value(resetsignal)})"
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elif resetsignal.get_property('async') and not resetsignal.get_property('activehigh'):
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return f"@(posedge clk or negedge {dereferencer.get_value(resetsignal)})"
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return "@(posedge clk)"
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def clog2(n: int) -> int:
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return n.bit_length() - 1
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