flt32.h File Reference

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

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Typedefs
typedef int	flt32

Functions
int	flt32_get_sign (flt32 x)
int	flt32_get_exp (flt32 x)
int	flt32_get_val (flt32 x)
void	flt32_get_sve (flt32 x, int *sign, int *val, int *exp)
int	flt32_leftmost_1 (int value)
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. You may reuse the code you wrote for field.c assignment. Or, you may use the provided file field.o in place of your code. That file is a compiled version of field.c written by an instructor. You will only be submitting one files (flt32.c).

Typedef Documentation

typedef int flt32

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 or with your field functions. No conditionals are required.

Parameters

x	some pattern of bits (may be 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

int flt32_get_exp

(

flt32

x

)

Extract the exponent of the argument

Parameters

x	the integer containing a IEEE floating point value

Returns

the exponent of the argument, after removing bias

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

void flt32_get_sve	(	flt32	x,
		int *	sign,
		int *	val,
		int *	exp
	)

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

Parameters

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

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_leftmost_1

(

int

value

)

Extract the position of the leftmost 1 in the argument's bits

Parameters

value

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 (think about the C xor operator (^) or with your field functions.

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