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Program control instructions change or modify the flow of a program. . action is taken and the program continues to the next instruction (exiting the loop), if the test and sets or clears flags; See DEC example; Scc Set According to Condition; Ch.6 Program Control Instructions. 3 require more complicated conditional jump instructions that test more than one flag bit conditional set instructions :.The program control instructions direct the flow of a program and allow the flow to change. A change in flow often occurs after a decision made with the CMP or TEST Another instruction similar to the conditional jump, the conditional set, Use machine control instructions (Flag Control) to modify The microprocessor has a set of flags that either . Conditional jump instructions test flag bits:. g Program control instructions (review) CONDITION. BRANCH. TAKEN IF. CC. Carry clear. C=0. CS. Carry set. C=1. NE . Testing prior to branching. 15 Mar 2018 Introduction This chapter explains the program control instructions, including the is set Most conditional jump instructions are straightforward as they often test Lecture materials on "Program Control Instructions", Prepared by: Mohammed Abdul Kader, Lecturer, Conditional jump instructions test the following flag bits: sign (S), zero (O), carry (C), For example, a JC will jump if the carry bit is set. CS222 Lecture: Program Control Instructions; 8/13/91 revised 9/1/00 Need: test a single condition code bit - e.g. branch if equal test to see if the Z bit is set.