Question: 1 . Why can TST and TEQ instructions affect the C flag? 2 . Consider the addition instruction with flexible second operand Operand 2 ,

1. Why can TST and TEQ instructions affect the C flag?
2. Consider the addition instruction with flexible second operand Operand2, given below:
ADD Rd, Rn, Rm, LSL #n
It is desired to modify this instruction to the following new syntax:
ADD Rd, Rm, LSL #n, Rn
This new syntax can be called addition instruction with flexible first operand Operand1. What minimum change in the hardware architecture is required for the implementation of this instruction?

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