math_private.h revision 4fd606d1f5abe38e1f42c38de1d2e895166bd0f4
/*
* ====================================================
* 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
* $NetBSD: math_private.h,v 1.12 2005/07/21 12:55:58 christos Exp $
*/
#ifndef _MATH_PRIVATE_H_
#define _MATH_PRIVATE_H_
/* 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. */
/*
* The ARM ports are little endian except for the FPA word order which is
* big endian.
*/
typedef union
{
double value;
struct
{
} parts;
#endif
#if (BYTE_ORDER == LITTLE_ENDIAN) && \
!(defined(__arm__) && !defined(__VFP_FP__))
typedef union
{
double value;
struct
{
} parts;
#endif
/* Get two 32 bit ints from a double. */
do { \
} while (0)
/* Get the more significant 32 bit int from a double. */
#define GET_HIGH_WORD(i,d) \
do { \
} while (0)
/* Get the less significant 32 bit int from a double. */
#define GET_LOW_WORD(i,d) \
do { \
} while (0)
/* Set a double from two 32 bit ints. */
do { \
} while (0)
/* Set the more significant 32 bits of a double from an int. */
#define SET_HIGH_WORD(d,v) \
do { \
} while (0)
/* Set the less significant 32 bits of a double from an int. */
#define SET_LOW_WORD(d,v) \
do { \
} while (0)
/* A union which permits us to convert between a float and a 32 bit
int. */
typedef union
{
float value;
/* Get a 32 bit int from a float. */
#define GET_FLOAT_WORD(i,d) \
do { \
} while (0)
/* Set a float from a 32 bit int. */
#define SET_FLOAT_WORD(d,i) \
do { \
} while (0)
/* ieee style elementary functions */
extern double __ieee754_sqrt (double);
extern double __ieee754_acos (double);
extern double __ieee754_acosh (double);
extern double __ieee754_log (double);
extern double __ieee754_atanh (double);
extern double __ieee754_asin (double);
extern double __ieee754_atan2 (double, double);
extern double __ieee754_exp (double);
extern double __ieee754_cosh (double);
extern double __ieee754_fmod (double, double);
extern double __ieee754_pow (double, double);
extern double __ieee754_lgamma_r (double, int *);
extern double __ieee754_gamma_r (double, int *);
extern double __ieee754_lgamma (double);
extern double __ieee754_gamma (double);
extern double __ieee754_log10 (double);
extern double __ieee754_log2 (double);
extern double __ieee754_sinh (double);
extern double __ieee754_hypot (double, double);
extern double __ieee754_j0 (double);
extern double __ieee754_j1 (double);
extern double __ieee754_y0 (double);
extern double __ieee754_y1 (double);
extern double __ieee754_jn (int, double);
extern double __ieee754_yn (int, double);
extern double __ieee754_remainder (double, double);
extern int __ieee754_rem_pio2 (double,double*);
extern double __ieee754_scalb (double, double);
/* fdlibm kernel function */
extern double __kernel_standard (double, double, int);
extern double __kernel_sin (double, double, int);
extern double __kernel_cos (double, double);
extern double __kernel_tan (double, double, int);
extern int __kernel_rem_pio2 (double*,double*,int,int,int,const int*);
///* ieee style elementary float functions */
//extern float __ieee754_sqrtf __P((float));
//extern float __ieee754_acosf __P((float));
//extern float __ieee754_acoshf __P((float));
//extern float __ieee754_logf __P((float));
//extern float __ieee754_atanhf __P((float));
//extern float __ieee754_asinf __P((float));
//extern float __ieee754_atan2f __P((float,float));
//extern float __ieee754_expf __P((float));
//extern float __ieee754_coshf __P((float));
//extern float __ieee754_fmodf __P((float,float));
//extern float __ieee754_powf __P((float,float));
//extern float __ieee754_lgammaf_r __P((float,int *));
//extern float __ieee754_gammaf_r __P((float,int *));
//extern float __ieee754_lgammaf __P((float));
//extern float __ieee754_gammaf __P((float));
//extern float __ieee754_log10f __P((float));
//extern float __ieee754_log2f __P((float));
//extern float __ieee754_sinhf __P((float));
//extern float __ieee754_hypotf __P((float,float));
//extern float __ieee754_j0f __P((float));
//extern float __ieee754_j1f __P((float));
//extern float __ieee754_y0f __P((float));
//extern float __ieee754_y1f __P((float));
//extern float __ieee754_jnf __P((int,float));
//extern float __ieee754_ynf __P((int,float));
//extern float __ieee754_remainderf __P((float,float));
//extern int __ieee754_rem_pio2f __P((float,float*));
//extern float __ieee754_scalbf __P((float,float));
///* float versions of fdlibm kernel functions */
//extern float __kernel_sinf __P((float,float,int));
//extern float __kernel_cosf __P((float,float));
//extern float __kernel_tanf __P((float,float,int));
//extern int __kernel_rem_pio2f __P((float*,float*,int,int,int,const int*));
#endif /* _MATH_PRIVATE_H_ */