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In this paper, we present an RTL time-budgeting method for early design planning. We formulate the RTL time-budgeting method into a slack distribution problem. We present three algorithms, namely the Lagrange-Multipliers-based algorithm, the balanced slack distribution algorithm, and the AT-based slack distribution algorithm. We propose an integrated RTL/logic-synthesis and physical-synthesis design flow to exploit the RTL time-budgeting problem. Experimental results have demonstrated that our proposed algorithms can effectively provide timing budgets at RTL.
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