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Which of the following is TRUE for x86 ISA.   (1 Point)Fist instruction saves the value of st0 to memory.The fxch instruction exchanges the contents of two floating point registers.Fst instruction converts the FP value to an integer before saving it to memory.None of these

Question

Which of the following is TRUE for x86 ISA.   (1 Point)Fist instruction saves the value of st0 to memory.The fxch instruction exchanges the contents of two floating point registers.Fst instruction converts the FP value to an integer before saving it to memory.None of these

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Solution

The correct answer is: The fxch instruction exchanges the contents of two floating point registers.

Here's why:

  1. The first statement is false. The fst instruction in x86 ISA saves the value of st0 to memory, not the fist instruction.

  2. The second statement is true. The fxch instruction in x86 ISA does indeed exchange the contents of two floating point registers.

  3. The third statement is false. The fist instruction, not the fst instruction, converts the FP value to an integer before saving it to memory.

  4. The fourth statement is false because the second statement is true.

This problem has been solved

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