Function definition for "float_twice()" function:

The implementation for "float_twice()" function is given below:

//Header file

#include <stdio.h>

#include <assert.h>

//Declare the float_bits in unsigned data type

typedef unsigned float_bits;

//Function declaration for float_twice function

float_bits float_twice(float_bits f);

//Function definition for float_twice function

float_bits float_twice(float_bits f)

{

//Compute the value of sign field

unsigned signBit = f >> 31;

//Compute the value of exponent filed

unsigned exponentBit = f >> 23 & 0xFF;

//Compute the value of fraction field

unsigned fractionBit = f & 0x7FFFFF;

//Check if the value of "f" is "NaN" or not

if (exponentBit == 0xFF)

{

/* If "f" is "NaN", then return the given "f" value */

return f;

}

//If exponent is "0", then

if (exponentBit == 0)

{

/* Performs denormalized */

fractionBit <<= 1;

}

//If exponent is "0xFF - 1", then

else if (exponentBit == 0xFF - 1)

{

/* twice to infinity. In infinity case, the value of exponent is all ones and fraction is all zeros. */

exponentBit = 0xFF;

fractionBit = 0;

}

//Otherwise performs normalized

else

{

/* Here add 1 with exponent bit */

exponentBit += 1;

}

/* Return the value of 2.0 * f using the below expression. */

return signBit << 31 | exponentBit << 23 | fractionBit;

}

//Main function

int main(int argc, char **argv)

{

/* Call function "float_twice" with checking value using "assert" function */

/* For not a number that is "NaN" */

assert(float_twice(0xFFFFFFF8) == 0xFFFFFFF8);

/* For a valid number" */

assert(float_twice(0x10001234) == 0x10801234);

}

The given code is used to compute the twice of floating-point number "f" that is "2