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/*
* ====================================================
* 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
* $FreeBSD$
*/
#ifndef _MATH_PRIVATE_H_
#define _MATH_PRIVATE_H_
#include <sys/types.h>
#include <machine/endian.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.
*/
#if BYTE_ORDER == BIG_ENDIAN
typedef union
{
double value;
struct
{
u_int32_t msw;
u_int32_t lsw;
} parts;
} ieee_double_shape_type;
#endif
#if BYTE_ORDER == LITTLE_ENDIAN
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;
/* FIXME: Assumes 32 bit int. */
unsigned int 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 */
double __ieee754_sqrt(double);
double __ieee754_acos(double);
double __ieee754_acosh(double);
double __ieee754_log(double);
double __ieee754_atanh(double);
double __ieee754_asin(double);
double __ieee754_atan2(double,double);
double __ieee754_exp(double);
double __ieee754_cosh(double);
double __ieee754_fmod(double,double);
double __ieee754_pow(double,double);
double __ieee754_lgamma_r(double,int *);
double __ieee754_gamma_r(double,int *);
double __ieee754_lgamma(double);
double __ieee754_gamma(double);
double __ieee754_log10(double);
double __ieee754_sinh(double);
double __ieee754_hypot(double,double);
double __ieee754_j0(double);
double __ieee754_j1(double);
double __ieee754_y0(double);
double __ieee754_y1(double);
double __ieee754_jn(int,double);
double __ieee754_yn(int,double);
double __ieee754_remainder(double,double);
int __ieee754_rem_pio2(double,double*);
double __ieee754_scalb(double,double);
/* fdlibm kernel function */
double __kernel_standard(double,double,int);
double __kernel_sin(double,double,int);
double __kernel_cos(double,double);
double __kernel_tan(double,double,int);
int __kernel_rem_pio2(double*,double*,int,int,int,const int*);
/* ieee style elementary float functions */
float __ieee754_sqrtf(float);
float __ieee754_acosf(float);
float __ieee754_acoshf(float);
float __ieee754_logf(float);
float __ieee754_atanhf(float);
float __ieee754_asinf(float);
float __ieee754_atan2f(float,float);
float __ieee754_expf(float);
float __ieee754_coshf(float);
float __ieee754_fmodf(float,float);
float __ieee754_powf(float,float);
float __ieee754_lgammaf_r(float,int *);
float __ieee754_gammaf_r(float,int *);
float __ieee754_lgammaf(float);
float __ieee754_gammaf(float);
float __ieee754_log10f(float);
float __ieee754_sinhf(float);
float __ieee754_hypotf(float,float);
float __ieee754_j0f(float);
float __ieee754_j1f(float);
float __ieee754_y0f(float);
float __ieee754_y1f(float);
float __ieee754_jnf(int,float);
float __ieee754_ynf(int,float);
float __ieee754_remainderf(float,float);
int __ieee754_rem_pio2f(float,float*);
float __ieee754_scalbf(float,float);
/* float versions of fdlibm kernel functions */
float __kernel_sinf(float,float,int);
float __kernel_cosf(float,float);
float __kernel_tanf(float,float,int);
int __kernel_rem_pio2f(float*,float*,int,int,int,const int*);
#if defined(__alpha__) || defined(__ia64__) || defined(__sparc64__) || \
defined(__powerpc__)
#define __generic___ieee754_acos __ieee754_acos
#define __generic___ieee754_asin __ieee754_asin
#define __generic___ieee754_atan2 __ieee754_atan2
#define __generic___ieee754_exp __ieee754_exp
#define __generic___ieee754_fmod __ieee754_fmod
#define __generic___ieee754_log __ieee754_log
#define __generic___ieee754_log10 __ieee754_log10
#define __generic___ieee754_remainder __ieee754_remainder
#define __generic___ieee754_scalb __ieee754_scalb
#define __generic___ieee754_sqrt __ieee754_sqrt
#define __generic_atan atan
#define __generic_ceil ceil
#define __generic_copysign copysign
#define __generic_cos cos
#define __generic_finite finite
#define __generic_floor floor
#define __generic_ilogb ilogb
#define __generic_log1p log1p
#define __generic_logb logb
#define __generic_rint rint
#define __generic_scalbn scalbn
#define __generic_significand significand
#define __generic_sin sin
#define __generic_tan tan
#endif
#endif /* !_MATH_PRIVATE_H_ */
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