build/generic_toolchain/add_period_constraint: Integrated rounding to lowest picosecond and remove add_period_constraint from altera/quartus.
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@ -214,15 +214,6 @@ fi
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if subprocess.call(shell + [script]) != 0:
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raise OSError("Error occured during Quartus's script execution.")
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def add_period_constraint(self, platform, clk, period):
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clk.attr.add("keep")
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period = math.floor(period*1e3)/1e3 # round to lowest picosecond
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if clk in self.clocks:
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if period != self.clocks[clk]:
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raise ValueError("Clock already constrained to {:.2f}ns, new constraint to {:.2f}ns"
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.format(self.clocks[clk], period))
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self.clocks[clk] = period
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def add_false_path_constraint(self, platform, from_, to):
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from_.attr.add("keep")
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to.attr.add("keep")
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@ -90,6 +90,7 @@ class GenericToolchain:
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def add_period_constraint(self, platform, clk, period):
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clk.attr.add("keep")
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period = math.floor(period*1e3)/1e3 # Round to lowest picosecond.
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if clk in self.clocks:
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if period != self.clocks[clk]:
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raise ValueError("Clock already constrained to {:.2f}ns, new constraint to {:.2f}ns"
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