Suppose X20 contains the decimal value 5 and X21 contains the decimal value -5. Which branch condition is not true after the following SUBS is executed?

```
SUBS X9, X20, X21
B.__ NEXT
ADDI X20, #1
```

Answer :

The branch condition not true is B.NEXT

After the execution of the SUBS instruction, the result will be stored in X9. The SUBS instruction subtracts the value in X21 from the value in X20 and stores the result in X9. In this case, X20 contains 5 and X21 contains -5, so the result of the subtraction will be 10. The branch condition B.NEXT checks if the result of the subtraction is negative or zero and branches to the NEXT label if it is. Since the result is positive (10), the branch condition is not true and the program will not branch to the NEXT label. After the SUBS instruction, the ADDI instruction increments the value in X20 by 1. This is unrelated to the branch condition and does not affect which branch condition is true or false.

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