Subversion Repositories HelenOS-historic

/*

 * Copyright (C) 2005 Josef Cejka

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * - Redistributions of source code must retain the above copyright

 *   notice, this list of conditions and the following disclaimer.

 * - Redistributions in binary form must reproduce the above copyright

 *   notice, this list of conditions and the following disclaimer in the

 *   documentation and/or other materials provided with the distribution.

 * - The name of the author may not be used to endorse or promote products

 *   derived from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR

 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES

 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.

 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,

 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#include<softfloat.h>

#include<sftypes.h>

#include<add.h>

#include<sub.h>

#include<mul.h>

#include<div.h>

#include<conversion.h>

#include<comparison.h>

#include<other.h>

/* Arithmetic functions */

float __addsf3(float a, float b)

{

    float32 fa, fb;

    fa.f=a;

    fb.f=b;

    if (fa.parts.sign!=fb.parts.sign) {

        if (fa.parts.sign) {

            fa.parts.sign=0;

            return subFloat32(fb,fa).f;

        };

        fb.parts.sign=0;

        return subFloat32(fa,fb).f;

    }

    return addFloat32(fa,fb).f;

}

float __subsf3(float a, float b)

{

    float32 fa, fb;

    fa.f=a;

    fb.f=b;

    if (fa.parts.sign!=fb.parts.sign) {

        fb.parts.sign=!fb.parts.sign;

        return addFloat32(fa,fb).f;

    }

    return subFloat32(fa,fb).f;

}

float __mulsf3(float a, float b)

{

    float32 fa, fb;

    fa.f=a;

    fb.f=b;

    return  mulFloat32(fa, fb).f;

}

float __divsf3(float a, float b)

{

    float32 fa, fb;

    fa.f=a;

    fb.f=b;

    //return    divFloat32(fa, fb).f;

}

float __negsf2(float a)

{

    float32 fa;

    fa.f=a;

    fa.parts.sign=!fa.parts.sign;

    return fa.f;

}

double __negdf2(double a)

{

    float64 fa;

    fa.d=a;

    fa.parts.sign=!fa.parts.sign;

    return fa.d;

}

/* Conversion functions */

double __extendsfdf2(float a)

{

    float32 fa;

    fa.f = a;

    return convertFloat32ToFloat64(fa).d;

}

float __truncdfsf2(double a)

{

    float64 da;

    da.d = a;

    return convertFloat64ToFloat32(da).f;

}

/* Comparison functions */

/* a<b .. -1

 * a=b ..  0

 * a>b ..  1

 * */

int __cmpsf2(float a, float b)

{

    float32 fa,fb;

    fa.f=a;

    fb.f=b;

    if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) {

        return 1; /* no special constant for unordered - maybe signaled? */

    };

    if (isFloat32eq(fa,fb)) {

        return 0;

    };

    if (isFloat32lt(fa,fb)) {

        return -1;

        };

    return 1;

}

int __unordsf2(float a, float b)

{

    float32 fa,fb;

    fa.f=a;

    fb.f=b;

    return ((isFloat32NaN(fa))||(isFloat32NaN(fb)));

}

/**

 * @return zero, if neither argument is a NaN and are equal

 * */

int __eqsf2(float a, float b)

{

    float32 fa,fb;

    fa.f=a;

    fb.f=b;

    if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) {

        /* TODO: sigNaNs*/

        return 1;

        };

    return isFloat32eq(fa,fb)-1;

}

/* strange behavior, but it was in gcc documentation */

int __nesf2(float a, float b)

{

    return __eqsf2(a,b);

}

/* return value >= 0 if a>=b and neither is NaN */

int __gesf2(float a, float b)

{

    float32 fa,fb;

    fa.f=a;

    fb.f=b;

    if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) {

        /* TODO: sigNaNs*/

        return -1;

        };

    if (isFloat32eq(fa,fb)) {

        return 0;

    };

    if (isFloat32gt(fa,fb)) {

        return 1;

        };

    return -1;

}

/** Return negative value, if a<b and neither is NaN*/

int __ltsf2(float a, float b)

{

    float32 fa,fb;

    fa.f=a;

    fb.f=b;

    if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) {

        /* TODO: sigNaNs*/

        return 1;

        };

    if (isFloat32lt(fa, fb)) {

        return -1;

        };

    return 0;

}

/* return value <= 0 if a<=b and neither is NaN */

int __lesf2(float a, float b)

{

    float32 fa,fb;

    fa.f=a;

    fb.f=b;

    if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) {

        /* TODO: sigNaNs*/

        return 1;

        };

    if (isFloat32eq(fa,fb)) {

        return 0;

    };

    if (isFloat32lt(fa,fb)) {

        return -1;

        };

    return 1;

}

/** Return positive value, if a>b and neither is NaN*/

int __gtsf2(float a, float b)

{

    float32 fa,fb;

    fa.f=a;

    fb.f=b;

    if ((isFloat32NaN(fa))||(isFloat32NaN(fb))) {

        /* TODO: sigNaNs*/

        return -1;

        };

    if (isFloat32gt(fa, fb)) {

        return 1;

        };

    return 0;

}

/* Other functions */

float __powisf2(float a, int b)

{

//TODO: 

}

float __mulsc3(float a, float b, float c, float d)

{

//TODO:

}

float __divsc3(float a, float b, float c, float d)

{

//TODO:

}