Subversion Repositories openrisc

/* @(#)fdlibm.h 1.5 04/04/22 */

/*

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

 * Copyright (C) 2004 by Sun Microsystems, Inc. All rights reserved.

 *

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

 * software is freely granted, provided that this notice

 * is preserved.

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

 */

#ifndef __CLASSPATH_FDLIBM_H__

#define __CLASSPATH_FDLIBM_H__

/*

 * On AIX we need _ALL_SOURCE defined to compile/configure native-lib, but can't

 *  have it defined to compile fdlibm.  UGH.

 */

#ifdef _AIX

#undef _ALL_SOURCE

#endif

#include <config.h>

#include <stdlib.h>

/*

 * AIX includes a header that defines hz,

 * which conflicts with an fdlibm variable in some functions.

 */

#ifdef _AIX

#undef hz

#endif

/* GCJ LOCAL: Include files.  */

#include "ieeefp.h"

/* CLASSPATH LOCAL: */

#include "namespace.h"

#include "mprec.h"

/* CYGNUS LOCAL: Default to XOPEN_MODE.  */

#define _XOPEN_MODE

#ifdef __P

#undef __P

#endif

/* Sometimes it's necessary to define __LITTLE_ENDIAN explicitly

   but these catch some common cases. */

#if 0

#if defined(i386) || defined(i486) || \

        defined(intel) || defined(x86) || defined(i86pc) || \

        defined(__alpha) || defined(__osf__)

#define __LITTLE_ENDIAN

#endif

#ifdef __LITTLE_ENDIAN

#define __HI(x) *(1+(int*)&x)

#define __LO(x) *(int*)&x

#define __HIp(x) *(1+(int*)x)

#define __LOp(x) *(int*)x

#else

#define __HI(x) *(int*)&x

#define __LO(x) *(1+(int*)&x)

#define __HIp(x) *(int*)x

#define __LOp(x) *(1+(int*)x)

#endif

#endif

#ifdef __STDC__

#define __P(p)  p

#else

#define __P(p)  ()

#endif

/*

 * ANSI/POSIX

 */

extern int signgam;

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

enum fdversion {fdlibm_ieee = -1, fdlibm_svid, fdlibm_xopen, fdlibm_posix};

#define _LIB_VERSION_TYPE enum fdversion

#define _LIB_VERSION _fdlib_version  

/* if global variable _LIB_VERSION is not desirable, one may

 * change the following to be a constant by:

 *      #define _LIB_VERSION_TYPE const enum version

 * In that case, after one initializes the value _LIB_VERSION (see

 * s_lib_version.c) during compile time, it cannot be modified

 * in the middle of a program

 */

extern  _LIB_VERSION_TYPE  _LIB_VERSION;

#define _IEEE_  fdlibm_ieee

#define _SVID_  fdlibm_svid

#define _XOPEN_ fdlibm_xopen

#define _POSIX_ fdlibm_posix

struct exception {

        int type;

        char *name;

        double arg1;

        double arg2;

        double retval;

};

#define HUGE            MAXFLOAT

/*

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

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

 */

#define X_TLOSS         1.41484755040568800000e+16 

#define DOMAIN          1

#define SING            2

#define OVERFLOW        3

#define UNDERFLOW       4

#define TLOSS           5

#define PLOSS           6

/* These typedefs are true for the targets running Java. */

#define _IEEE_LIBM

#ifdef __cplusplus

extern "C" {

#endif

/*

 * ANSI/POSIX

 */

extern double acos __P((double));

extern double asin __P((double));

extern double atan __P((double));

extern double atan2 __P((double, double));

extern double cos __P((double));

extern double sin __P((double));

extern double tan __P((double));

extern double cosh __P((double));

extern double sinh __P((double));

extern double tanh __P((double));

extern double exp __P((double));

extern double frexp __P((double, int *));

extern double ldexp __P((double, int));

extern double log __P((double));

extern double log10 __P((double));

extern double modf __P((double, double *));

extern double pow __P((double, double));

extern double sqrt __P((double));

extern double ceil __P((double));

extern double fabs __P((double));

extern double floor __P((double));

extern double fmod __P((double, double));

extern double erf __P((double));

extern double erfc __P((double));

extern double gamma __P((double));

extern double hypot __P((double, double));

#if !defined(isnan)

#define isnan(x) ((x) != (x))

#endif

extern int finite __P((double));

extern double j0 __P((double));

extern double j1 __P((double));

extern double jn __P((int, double));

extern double lgamma __P((double));

extern double y0 __P((double));

extern double y1 __P((double));

extern double yn __P((int, double));

extern double acosh __P((double));

extern double asinh __P((double));

extern double atanh __P((double));

extern double cbrt __P((double));

extern double logb __P((double));

extern double nextafter __P((double, double));

extern double remainder __P((double, double));

#ifdef _SCALB_INT

extern double scalb __P((double, int));

#else

extern double scalb __P((double, double));

#endif

extern int matherr __P((struct exception *));

/*

 * IEEE Test Vector

 */

extern double significand __P((double));

/*

 * Functions callable from C, intended to support IEEE arithmetic.

 */

extern double copysign __P((double, double));

extern int ilogb __P((double));

extern double rint __P((double));

extern double scalbn __P((double, int));

/*

 * BSD math library entry points

 */

extern double expm1 __P((double));

extern double log1p __P((double));

/*

 * Reentrant version of gamma & lgamma; passes signgam back by reference

 * as the second argument; user must allocate space for signgam.

 */

#ifdef _REENTRANT

extern double gamma_r __P((double, int *));

extern double lgamma_r __P((double, int *));

#endif  /* _REENTRANT */

/* ieee style elementary functions */

extern double __ieee754_sqrt __P((double));

extern double __ieee754_acos __P((double));

extern double __ieee754_acosh __P((double));

extern double __ieee754_log __P((double));

extern double __ieee754_atanh __P((double));

extern double __ieee754_asin __P((double));

extern double __ieee754_atan2 __P((double,double));

extern double __ieee754_exp __P((double));

extern double __ieee754_cosh __P((double));

extern double __ieee754_fmod __P((double,double));

extern double __ieee754_pow __P((double,double));

extern double __ieee754_lgamma_r __P((double,int *));

extern double __ieee754_gamma_r __P((double,int *));

extern double __ieee754_lgamma __P((double));

extern double __ieee754_gamma __P((double));

extern double __ieee754_log10 __P((double));

extern double __ieee754_sinh __P((double));

extern double __ieee754_hypot __P((double,double));

extern double __ieee754_j0 __P((double));

extern double __ieee754_j1 __P((double));

extern double __ieee754_y0 __P((double));

extern double __ieee754_y1 __P((double));

extern double __ieee754_jn __P((int,double));

extern double __ieee754_yn __P((int,double));

extern double __ieee754_remainder __P((double,double));

extern int32_t    __ieee754_rem_pio2 __P((double,double*));

#ifdef _SCALB_INT

extern double __ieee754_scalb __P((double,int));

#else

extern double __ieee754_scalb __P((double,double));

#endif

/* fdlibm kernel function */

extern double __kernel_standard __P((double,double,int));

extern double __kernel_sin __P((double,double,int));

extern double __kernel_cos __P((double,double));

extern double __kernel_tan __P((double,double,int));

extern int    __kernel_rem_pio2 __P((double*,double*,int,int,int,const int*));

/* Classpath extensions */

/* 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  

  typedef union

  {

    double value;

    struct

    {

      uint32_t msw;

      uint32_t lsw;

    } parts;

  } ieee_double_shape_type;

#endif  

#ifdef __IEEE_LITTLE_ENDIAN  

  typedef union

  {

    double value;

    struct

    {

      uint32_t lsw;

      uint32_t msw;

    } parts;

  } ieee_double_shape_type;

#endif  

  /* Get two 32 bit ints from a double.  */

#define EXTRACT_WORDS(ix0,ix1,d)                                  \

  do {                                                            \

    ieee_double_shape_type ew_u;                                  \

    ew_u.value = (d);                                             \

    (ix0) = ew_u.parts.msw;                                       \

    (ix1) = ew_u.parts.lsw;                                       \

  } while (0)

/* Get the more significant 32 bit int from a double.  */

#define GET_HIGH_WORD(i,d)                                      \

  do {                                                            \

    ieee_double_shape_type gh_u;                                  \

    gh_u.value = (d);                                             \

    (i) = gh_u.parts.msw;                                         \

  } while (0)

/* Get the less significant 32 bit int from a double.  */

#define GET_LOW_WORD(i,d)                                       \

  do {                                                            \

    ieee_double_shape_type gl_u;                                  \

    gl_u.value = (d);                                             \

    (i) = gl_u.parts.lsw;                                         \

  } while (0)

/* Set a double from two 32 bit ints.  */

#define INSERT_WORDS(d,ix0,ix1)                                 \

  do {                                                            \

    ieee_double_shape_type iw_u;                                  \

    iw_u.parts.msw = (ix0);                                       \

    iw_u.parts.lsw = (ix1);                                       \

    (d) = iw_u.value;                                             \

  } while (0)

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

#define SET_HIGH_WORD(d,v)                                      \

  do {                                                            \

    ieee_double_shape_type sh_u;                                  \

    sh_u.value = (d);                                             \

    sh_u.parts.msw = (v);                                         \

    (d) = sh_u.value;                                             \

  } while (0)

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

#define SET_LOW_WORD(d,v)                                       \

  do {                                                            \

    ieee_double_shape_type sl_u;                                  \

    sl_u.value = (d);                                             \

    sl_u.parts.lsw = (v);                                         \

    (d) = sl_u.value;                                             \

  } while (0)

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

   int.  */

typedef union

{

  float value;

  uint32_t word;

} ieee_float_shape_type;

/* Get a 32 bit int from a float.  */

#define GET_FLOAT_WORD(i,d)                                     \

do {                                                            \

  ieee_float_shape_type gf_u;                                   \

  gf_u.value = (d);                                             \

  (i) = gf_u.word;                                              \

} while (0)

/* Set a float from a 32 bit int.  */

#define SET_FLOAT_WORD(d,i)                                     \

do {                                                            \

  ieee_float_shape_type sf_u;                                   \

  sf_u.word = (i);                                              \

  (d) = sf_u.value;                                             \

} while (0)

#ifdef __cplusplus

}

#endif

#endif /* __CLASSPATH_FDLIBM_H__ */