/*

* Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:

*

*/

/**

 @file

 @publishedAll

 @released

*/

#ifndef _IEEE_FP_H_

#define _IEEE_FP_H_

#include "_ansi.h"

#include <libc/machine/ieeefp.h>

/* FIX THIS FIX THIS FIX THIS:

   Neither of __ieee_{float,double}_shape_tape seem to be used anywhere

   except in libm/test.  If that is the case, please delete these from here.

   If that is not the case, please insert documentation here describing why

   they're needed.  */

#ifdef __IEEE_BIG_ENDIAN

typedef union 

{

  double value;

  struct 

  {

    unsigned int sign : 1;

    unsigned int exponent: 11;

    unsigned int fraction0:4;

    unsigned int fraction1:16;

    unsigned int fraction2:16;

    unsigned int fraction3:16;

  } number;

  struct 

  {

    unsigned int sign : 1;

    unsigned int exponent: 11;

    unsigned int quiet:1;

    unsigned int function0:3;

    unsigned int function1:16;

    unsigned int function2:16;

    unsigned int function3:16;

  } nan;

  struct 

  {

    unsigned long msw;

    unsigned long lsw;

  } parts;

    long aslong[2];

} __ieee_double_shape_type;

#endif

#ifdef __IEEE_LITTLE_ENDIAN

typedef union 

{

  double value;

  struct 

  {

#ifdef __SMALL_BITFIELDS

    unsigned int fraction3:16;

    unsigned int fraction2:16;

    unsigned int fraction1:16;

    unsigned int fraction0: 4;

#else

    unsigned int fraction1:32;

    unsigned int fraction0:20;

#endif

    unsigned int exponent :11;

    unsigned int sign     : 1;

  } number;

  struct 

  {

#ifdef __SMALL_BITFIELDS

    unsigned int function3:16;

    unsigned int function2:16;

    unsigned int function1:16;

    unsigned int function0:3;

#else

    unsigned int function1:32;

    unsigned int function0:19;

#endif

    unsigned int quiet:1;

    unsigned int exponent: 11;

    unsigned int sign : 1;

  } nan;

  struct 

  {

    unsigned long lsw;

    unsigned long msw;

  } parts;

  long aslong[2];

} __ieee_double_shape_type;

#endif

#ifdef __IEEE_BIG_ENDIAN

typedef union

{

  float value;

  struct 

  {

    unsigned int sign : 1;

    unsigned int exponent: 8;

    unsigned int fraction0: 7;

    unsigned int fraction1: 16;

  } number;

  struct 

  {

    unsigned int sign:1;

    unsigned int exponent:8;

    unsigned int quiet:1;

    unsigned int function0:6;

    unsigned int function1:16;

  } nan;

  long p1;

} __ieee_float_shape_type;

#endif

#ifdef __IEEE_LITTLE_ENDIAN

typedef union

{

  float value;

  struct 

  {

    unsigned int fraction0: 7;

    unsigned int fraction1: 16;

    unsigned int exponent: 8;

    unsigned int sign : 1;

  } number;

  struct 

  {

    unsigned int function1:16;

    unsigned int function0:6;

    unsigned int quiet:1;

    unsigned int exponent:8;

    unsigned int sign:1;

  } nan;

  long p1;

} __ieee_float_shape_type;

#endif

/**

FLOATING ROUNDING

*/

typedef int fp_rnd;

#define FP_RN 0 	/* Round to nearest 		*/

#define FP_RM 1		/* Round down 			*/

#define FP_RP 2		/* Round up 			*/

#define FP_RZ 3		/* Round to zero (trunate) 	*/

fp_rnd fpgetround(void);

fp_rnd fpsetround(fp_rnd);

/**

EXCEPTIONS 

*/

typedef int fp_except;

#define FP_X_INV 0x10	/* Invalid operation 		*/

#define FP_X_DX  0x80	/* Divide by zero		*/

#define FP_X_OFL 0x04	/* Overflow exception		*/

#define FP_X_UFL 0x02	/* Underflow exception		*/

#define FP_X_IMP 0x01	/* imprecise exception		*/

fp_except fpgetmask(void);

fp_except fpsetmask(fp_except);

fp_except fpgetsticky(void);

fp_except fpsetsticky(fp_except);

/**

INTEGER ROUNDING 

*/

typedef int fp_rdi;

#define FP_RDI_TOZ 0	/* Round to Zero 		*/

#define FP_RDI_RD  1	/* Follow float mode		*/

fp_rdi fpgetroundtoi(void);

fp_rdi fpsetroundtoi(fp_rdi);

int isnan(double);

int isinf(double);

int finite(double);

int isnanf(float);

int isinff(float);

int finitef(float);

#define __IEEE_DBL_EXPBIAS 1023

#define __IEEE_FLT_EXPBIAS 127

#define __IEEE_DBL_EXPLEN 11

#define __IEEE_FLT_EXPLEN 8

#define __IEEE_DBL_FRACLEN (64 - (__IEEE_DBL_EXPLEN + 1))

#define __IEEE_FLT_FRACLEN (32 - (__IEEE_FLT_EXPLEN + 1))

#define __IEEE_DBL_MAXPOWTWO	((double)(1L << 32 - 2) * (1L << (32-11) - 32 + 1))

#define __IEEE_FLT_MAXPOWTWO	((float)(1L << (32-8) - 1))

#define __IEEE_DBL_NAN_EXP 0x7ff

#define __IEEE_FLT_NAN_EXP 0xff

#define isnanf(x) (((*(long *)&(x) & 0x7f800000L)==0x7f800000L) && \

		   ((*(long *)&(x) & 0x007fffffL)!=0000000000L))

#define isinff(x) (((*(long *)&(x) & 0x7f800000L)==0x7f800000L) && \

		   ((*(long *)&(x) & 0x007fffffL)==0000000000L))

#define finitef(x) (((*(long *)&(x) & 0x7f800000L)!=0x7f800000L))

#endif /* _IEEE_FP_H_ */