flt32.h File Reference

Defines interface of flt32.c functions (do not modify) More...

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Macros
#define	flt32   int

Functions
int	flt32_get_sign (flt32 x)
int	flt32_get_exp (flt32 x)
int	flt32_get_val (flt32 x)
void	flt32_get_all (flt32 x, int *sign, int *exp, int *val)
int	flt32_left_most_1 (int bits)
flt32	flt32_abs (flt32 x)
flt32	flt32_negate (flt32 x)
flt32	flt32_add (flt32 x, flt32 y)
flt32	flt32_sub (flt32 x, flt32 y)

Detailed Description

This file defines the interface to a C file flt32.c that you will complete. You will learn how to do floating point arithmatic without using any float variables. Rather you will perform the operations by using the sign, exponent, and digit fields as defined in the IEEE floating Point Standard.

Macro Definition Documentation

#define flt32   int

Whenever flt32" is used, the value is an integer in the IEEE floating point 32 bit standard.

Function Documentation

flt32 flt32_abs

(

flt32

x

)

Absolute value of the argument. This can be done with a simple bit manipulation operation. No conditionals are required.

Parameters

x	the integer containing a IEEE floating point value

Returns

the absolute value of the parameter

Todo:

Implement in flt32.c based on documentation contained in flt32.h

flt32 flt32_add	(	flt32	x,
		flt32	y
	)

Add two floating point values

Parameters

x	an integer containing a IEEE floating point value
y	an integer containing a IEEE floating point value

Returns

x + y. Your code needs to account for a value of 0.0, but no other special cases (e.g. infinities)

Todo:

Implement in flt32.c based on documentation contained in flt32.h

void flt32_get_all	(	flt32	x,
		int *	sign,
		int *	exp,
		int *	val
	)

Get the sign, exponent, and value in a single call. You will use the

Parameters

x	the integer containing a IEEE floating point value
sign	pointer to location where sign will be stored
exp	pointer to location where exponent will be stored
val	pointer to location where value will be stored C pointers to return values.

Todo:

Implement in flt32.c based on documentation contained in flt32.h

int flt32_get_exp

(

flt32

x

)

Extract the exponent of the argument

Parameters

x	the integer containing a IEEE floating point value

Returns

the biased exponent of the argument

Todo:

Implement in flt32.c based on documentation contained in flt32.h

int flt32_get_sign

(

flt32

x

)

Extract the sign of the argument

Parameters

x	the integer containing a IEEE floating point value

Returns

0 if the value is 0 or positive, 1 if it is negative

Todo:

Implement in flt32.c based on documentation contained in flt32.h

int flt32_get_val

(

flt32

x

)

Extract the digits of the argument

Parameters

x	the integer containing a IEEE floating point value

Returns

the 24 bits representing the value (includes the implicit 1)

Todo:

Implement in flt32.c based on documentation contained in flt32.h

int flt32_left_most_1

(

int

bits

)

Extract the position of the left most 1 in the argument's bits

Parameters

bits	the integer

Returns

-1 if the value is 0, otherwise the position (0 to 31) of the left most 1 bit.

Todo:

Implement in flt32.c based on documentation contained in flt32.h

flt32 flt32_negate

(

flt32

x

)

Negate the argument. This can be done with a simple bit manipulation function. No conditionals are required.

Parameters

x	the integer containing a IEEE floating point value

Returns

the negation of the value

Todo:

Implement in flt32.c based on documentation contained in flt32.h

flt32 flt32_sub	(	flt32	x,
		flt32	y
	)

Subtract to floating point values

Parameters

x	an integer containing a IEEE floating point value
y	an integer containing a IEEE floating point value

Returns

x - y. Your code needs to account for a value of 0.0, but no other special cases (e.g. infinities)

Todo:

Implement in flt32.c based on documentation contained in flt32.h