Figure 7.21 shows an example of a microroutine in which bit-ORing is used to modify microinstruction addresses.

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Figure 7.21 shows an example of a microroutine in which bit-ORing is used to modify microinstruction addresses. Write an equivalent routine, without using bit-ORing, in which conditional branch microinstructions are used. How many additional microin- structions are needed? Assume that the conditional branch microinstructions can test some of the bits in the IR.

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