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def fowardingunit(rs1, rs2, ex_mem_rd, mem_wb_rd, ex_mem_regwrite,
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mem_wb_regwrite):
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if rs1 != 0 and rs1 == ex_mem_rd and ex_mem_regwrite:
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forward_a = '01'
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elif rs1 != 0 and rs1 == mem_wb_rd and mem_wb_regwrite:
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forward_a = '10'
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else:
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forward_a = '00'
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if rs2 != 0 and rs2 == ex_mem_rd and ex_mem_regwrite:
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forward_b = '01'
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elif rs2 != 0 and rs2 == mem_wb_rd and mem_wb_regwrite:
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forward_b = '10'
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else:
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forward_b = '00'
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return forward_a, forward_b
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