/*

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

* 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.

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

*/

/*

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

* $Id: math_private.h,v 1.3 2004/02/09 07:10:38 andersen Exp $

*/

#ifndef _MATH_PRIVATE_H_

#define _MATH_PRIVATE_H_

/* #include <endian.h> */

#include "SDL_endian.h"

/* #include <sys/types.h> */

#define _IEEE_LIBM

#define attribute_hidden

#define libm_hidden_proto(x)

#define libm_hidden_def(x)

#define strong_alias(x, y)

#ifndef __HAIKU__ /* already defined in a system header. */

typedef unsigned int u_int32_t;

#endif

#define atan SDL_uclibc_atan

#define __ieee754_atan2 SDL_uclibc_atan2

#define copysign SDL_uclibc_copysign

#define cos SDL_uclibc_cos

#define fabs SDL_uclibc_fabs

#define floor SDL_uclibc_floor

#define __ieee754_fmod SDL_uclibc_fmod

#define __ieee754_log SDL_uclibc_log

#define __ieee754_pow SDL_uclibc_pow

#define scalbn SDL_uclibc_scalbn

#define sin SDL_uclibc_sin

#define __ieee754_sqrt SDL_uclibc_sqrt

#define tan SDL_uclibc_tan

/* The original fdlibm 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. */

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

ints. */

/*

* Math on arm is special:

* For FPA, float words are always big-endian.

* For VFP, floats words follow the memory system mode.

*/

#if (SDL_BYTEORDER == SDL_BIG_ENDIAN)

typedef union

{

double value;

struct

{

u_int32_t msw;

u_int32_t lsw;

} parts;

} ieee_double_shape_type;

#else

typedef union

{

double value;

struct

{

u_int32_t lsw;

u_int32_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;

u_int32_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)

/* ieee style elementary functions */

extern double

__ieee754_sqrt(double)

attribute_hidden;

extern double __ieee754_acos(double) attribute_hidden;

extern double __ieee754_acosh(double) attribute_hidden;

extern double __ieee754_log(double) attribute_hidden;

extern double __ieee754_atanh(double) attribute_hidden;

extern double __ieee754_asin(double) attribute_hidden;

extern double __ieee754_atan2(double, double) attribute_hidden;

extern double __ieee754_exp(double) attribute_hidden;

extern double __ieee754_cosh(double) attribute_hidden;

extern double __ieee754_fmod(double, double) attribute_hidden;

extern double __ieee754_pow(double, double) attribute_hidden;

extern double __ieee754_lgamma_r(double, int *) attribute_hidden;

extern double __ieee754_gamma_r(double, int *) attribute_hidden;

extern double __ieee754_lgamma(double) attribute_hidden;

extern double __ieee754_gamma(double) attribute_hidden;

extern double __ieee754_log10(double) attribute_hidden;

extern double __ieee754_sinh(double) attribute_hidden;

extern double __ieee754_hypot(double, double) attribute_hidden;

extern double __ieee754_j0(double) attribute_hidden;

extern double __ieee754_j1(double) attribute_hidden;

extern double __ieee754_y0(double) attribute_hidden;

extern double __ieee754_y1(double) attribute_hidden;

extern double __ieee754_jn(int, double) attribute_hidden;

extern double __ieee754_yn(int, double) attribute_hidden;

extern double __ieee754_remainder(double, double) attribute_hidden;

extern int __ieee754_rem_pio2(double, double *) attribute_hidden;

#if defined(_SCALB_INT)

extern double __ieee754_scalb(double, int) attribute_hidden;

#else

extern double __ieee754_scalb(double, double) attribute_hidden;

#endif

/* fdlibm kernel function */

#ifndef _IEEE_LIBM

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

#endif

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

extern double __kernel_cos(double, double) attribute_hidden;

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

extern int __kernel_rem_pio2(double *, double *, int, int, int,

const int *) attribute_hidden;

#endif /* _MATH_PRIVATE_H_ */