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Question: What do you get if you add-14to itself 4 times? What is-14×4 ? Are they the same? What should they be?

Short Answer

Expert verified

The value of adding –1/4 four times and the value of multiplying -–1/4 by 4 are the same.

Step by step solution

01

Determine the IEEE 754 floating-point format.

The number will be converted into a binary number. The sign will be represented as a separate bit. The floating-point will have the scientific notation with a single digit to the left of the decimal point. The scientific notation will be normalized—it will have no leading 0s. The exponent field will have the value of the floating-point arithmetic.

02

Determine that the given statement is true.

The given number –1/4.

The decimal value of the given number is -0.25

Add -0.25four times with itself..

Multiplyingby 4, we have

Thus, it is clear that the value of adding –1/4 four times and the value of multiplying –1/4 by 4 are the same.

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Most popular questions from this chapter

IEEE 754-2008 contains a half precision that is only 16 bits wide. The left most bit is still the sign bit, the exponent is 5 bits wide and has a bias of 15, and the mantissa is 10 bits long. A hidden 1 is assumed. Write down the bit pattern to represent -1.5625×10-1assuming a version of this format, which uses an excess-16 format to store the exponent. Comment on how the range and accuracy of this 16-bit floating point format compares to the single precision IEEE 754 standard.

Calculate 1.666015625×100×1.9760×104+1.666015625×100×-1.9744×104

by hand, assuming each of the values is stored in the 16-bit half-precision format described in Exercise 3.27 (and also described in the text). Assume 1 guard, 1 round bit, and 1 sticky bit, and round to the nearest even. Show all the steps, and write your answer in both the 16-bit floating-point format and in decimal.

Question: Based on your answer to 3.38 and 3.39, is (1.666015625×100×1.9760×104)+1.666015625×100×-1.9744×104=1.666015625×100×1.9760×104+-1.9744×104

Based on your answers to 3.32 and 3.33, does

3.984375×10-1+3.4375×10-1+1.771×103=3.984375×10-1+3.4375×10-1+1.771×103?

Calculate the product of-8.0546875×100and-1.79931640625×10-1by hand, assuming A and B are stored in the 16-bit half precision format described in Exercise 3.27. Assume 1 guard, 1 round bit, and 1 sticky bit and round to the nearest even. Show all the steps; however, as is done in the example in the text, you can do the multiplication in human readable format instead of using the techniques described in Exercises 3.12 through 3.14. Indicate if there is overflow or underflow. Write your answer in both 16-bit floating point format described in Exercise 3.27 and also as a decimal number. How accurate is your result? How does it compare to the number you get if you do multiplication on a calculator?

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