/* FDLIBM.H

 * 

 * Portions Copyright (c) 1993-1999 Nokia Corporation and/or its subsidiary(-ies).

 * All rights reserved.

 */

/* @(#)fdlibm.h 5.1 93/09/24 */

/*

 * ====================================================

 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.

 *

 * Developed at SunPro, a Sun Microsystems, Inc. business.

 * Permission to use, copy, modify, and distribute this

 * software is freely granted, provided that this notice 

 * is preserved.

 * ====================================================

 */

#ifdef __cplusplus

extern "C" {

#endif

/**

SYMBIAN adaptations 

@internalComponent

*/

#define huge	fhuge

#define tiny	ftiny

/**

@internalComponent

*/

typedef unsigned long	__uint32_t;

typedef long			__int32_t;

#ifdef __VC32__

/* warning C4056: overflow in floating-point constant arithmetic 

 * Caused by negative floating point constants, it seems!

 * For example, static double foo = -1.0;

 */

#pragma warning( disable: 4056 )

#endif

#ifdef __ARMCC__

/* Warning:  #222-D: floating-point operation result is out of range

 * The compiler detects constant math that overflows, we want overflow though!

 */

#pragma diag_suppress 222

#endif

#include <math.h>

/**

@internalComponent

*/

#define	HUGE	((float)3.40282346638528860e+38)

/** 

set X_TLOSS = pi*2**52, which is possibly defined in <values.h>

(one may replace the following line by "#include <values.h>")

@internalComponent

*/

#define X_TLOSS		1.41484755040568800000e+16 

/**

ieee style elementary functions - ESTLIB is exporting

these functions directly, so we simply map the names across

@internalComponent

*/

#define __ieee754_cosh	cosh			

#define __ieee754_sinh	sinh			

#define __ieee754_tanh	tanh	

#define __ieee754_exp	exp			

/* The original code used statements like

	n0 = ((*(int*)&one)>>29)^1;		* index of high word *

	ix0 = *(n0+(int*)&x);			* high word of x *

	ix1 = *((1-n0)+(int*)&x);		* low word of x *

   to dig two 32 bit words out of the 64 bit IEEE floating point

   value.  That is non-ANSI, and, moreover, the gcc instruction

   scheduler gets it wrong.  We instead use the following macros.

   Unlike the original code, we determine the endianness at compile

   time, not at run time; I don't see much benefit to selecting

   endianness at run time.  */

#ifndef __IEEE_BIG_ENDIAN

#ifndef __IEEE_LITTLE_ENDIAN

 #error Must define endianness

#endif

#endif

/* A union which permits us to convert between a double and two 32 bit

   ints.  */

#ifdef __IEEE_BIG_ENDIAN

/**

@internalComponent

*/

typedef union 

{

  double value;

  struct 

  {

    unsigned long msw;

    unsigned long lsw;

  } parts;

} ieee_double_shape_type;

#else

#ifdef __IEEE_LITTLE_ENDIAN

/**

@internalComponent

*/

typedef union 

{

  double value;

  struct 

  {

    unsigned long lsw;

    unsigned long msw;

  } parts;

} ieee_double_shape_type;

#endif

#endif

/**

Get two 32 bit ints from a double.  

@internalComponent

*/

#define EXTRACT_WORDS(ix0,ix1,d)				\

{								\

  ieee_double_shape_type ew_u;					\

  ew_u.value = (d);						\

  (ix0) = ew_u.parts.msw;					\

  (ix1) = ew_u.parts.lsw;					\

}

/** 

Get the more significant 32 bit int from a double.  

@internalComponent

*/

#define GET_HIGH_WORD(i,d)					\

{								\

  ieee_double_shape_type gh_u;					\

  gh_u.value = (d);						\

  (i) = gh_u.parts.msw;						\

}

/**

Get the less significant 32 bit int from a double.  

@internalComponent

*/

#define GET_LOW_WORD(i,d)					\

{								\

  ieee_double_shape_type gl_u;					\

  gl_u.value = (d);						\

  (i) = gl_u.parts.lsw;						\

}

/**

Set a double from two 32 bit ints.  

@internalComponent

*/

#define INSERT_WORDS(d,ix0,ix1)					\

{								\

  ieee_double_shape_type iw_u;					\

  iw_u.parts.msw = (ix0);					\

  iw_u.parts.lsw = (ix1);					\

  (d) = iw_u.value;						\

}

/** 

Set the more significant 32 bits of a double from an int.  

@internalComponent

*/

#define SET_HIGH_WORD(d,v)					\

{								\

  ieee_double_shape_type sh_u;					\

  sh_u.value = (d);						\

  sh_u.parts.msw = (v);						\

  (d) = sh_u.value;						\

}

/** 

Set the less significant 32 bits of a double from an int.  

@internalComponent

*/

#define SET_LOW_WORD(d,v)					\

{								\

  ieee_double_shape_type sl_u;					\

  sl_u.value = (d);						\

  sl_u.parts.lsw = (v);						\

  (d) = sl_u.value;						\

}

/** 

A union which permits us to convert between a float and a 32 bit

int.  

@internalComponent

*/

typedef union

{

  float value;

  unsigned long word;

} ieee_float_shape_type;

/**

Get a 32 bit int from a float.  

@internalComponent

*/

#define GET_FLOAT_WORD(i,d)					\

{								\

  ieee_float_shape_type gf_u;					\

  gf_u.value = (d);						\

  (i) = gf_u.word;						\

}

/** 

Set a float from a 32 bit int.  

@internalComponent

*/

#define SET_FLOAT_WORD(d,i)					\

{								\

  ieee_float_shape_type sf_u;					\

  sf_u.word = (i);						\

  (d) = sf_u.value;						\

}

/**

Test a 32-bit value for being 0.

(x==0)? 0: (some value with top bit set to 1)

@internalComponent

*/

#define CHECK_ZERO(x)	((x)|-(__int32_t)(x))

#ifdef __cplusplus

}

#endif