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/* origin: FreeBSD /usr/src/lib/msun/src/math_private.h */
/*
* ====================================================
* 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.
* ====================================================
*/
#ifndef _LIBM_H
#define _LIBM_H
#include <stdint.h>
#include <float.h>
#include <math.h>
#include <complex.h>
#include "longdbl.h"
#include "libc.h"
union fshape {
float value;
uint32_t bits;
};
union dshape {
double value;
uint64_t bits;
};
/* Get two 32 bit ints from a double. */
#define EXTRACT_WORDS(hi,lo,d) \
do { \
union dshape __u; \
__u.value = (d); \
(hi) = __u.bits >> 32; \
(lo) = (uint32_t)__u.bits; \
} while (0)
/* Get a 64 bit int from a double. */
#define EXTRACT_WORD64(i,d) \
do { \
union dshape __u; \
__u.value = (d); \
(i) = __u.bits; \
} while (0)
/* Get the more significant 32 bit int from a double. */
#define GET_HIGH_WORD(i,d) \
do { \
union dshape __u; \
__u.value = (d); \
(i) = __u.bits >> 32; \
} while (0)
/* Get the less significant 32 bit int from a double. */
#define GET_LOW_WORD(i,d) \
do { \
union dshape __u; \
__u.value = (d); \
(i) = (uint32_t)__u.bits; \
} while (0)
/* Set a double from two 32 bit ints. */
#define INSERT_WORDS(d,hi,lo) \
do { \
union dshape __u; \
__u.bits = ((uint64_t)(hi) << 32) | (uint32_t)(lo); \
(d) = __u.value; \
} while (0)
/* Set a double from a 64 bit int. */
#define INSERT_WORD64(d,i) \
do { \
union dshape __u; \
__u.bits = (i); \
(d) = __u.value; \
} while (0)
/* Set the more significant 32 bits of a double from an int. */
#define SET_HIGH_WORD(d,hi) \
do { \
union dshape __u; \
__u.value = (d); \
__u.bits &= 0xffffffff; \
__u.bits |= (uint64_t)(hi) << 32; \
(d) = __u.value; \
} while (0)
/* Set the less significant 32 bits of a double from an int. */
#define SET_LOW_WORD(d,lo) \
do { \
union dshape __u; \
__u.value = (d); \
__u.bits &= 0xffffffff00000000ull; \
__u.bits |= (uint32_t)(lo); \
(d) = __u.value; \
} while (0)
/* Get a 32 bit int from a float. */
#define GET_FLOAT_WORD(i,d) \
do { \
union fshape __u; \
__u.value = (d); \
(i) = __u.bits; \
} while (0)
/* Set a float from a 32 bit int. */
#define SET_FLOAT_WORD(d,i) \
do { \
union fshape __u; \
__u.bits = (i); \
(d) = __u.value; \
} while (0)
/* fdlibm kernel functions */
int __rem_pio2_large(double*,double*,int,int,int);
int __rem_pio2(double,double*);
double __sin(double,double,int);
double __cos(double,double);
double __tan(double,double,int);
double __expo2(double);
double complex __ldexp_cexp(double complex,int);
int __rem_pio2f(float,double*);
float __sindf(double);
float __cosdf(double);
float __tandf(double,int);
float __expo2f(float);
float complex __ldexp_cexpf(float complex,int);
long double __sinl(long double, long double, int);
long double __cosl(long double, long double);
long double __tanl(long double, long double, int);
/* polynomial evaluation */
long double __polevll(long double, long double *, int);
long double __p1evll(long double, long double *, int);
// FIXME: not needed when -fexcess-precision=standard is supported (>=gcc4.5)
/*
* Attempt to get strict C99 semantics for assignment with non-C99 compilers.
*/
#if 1
#define STRICT_ASSIGN(type, lval, rval) do { \
volatile type __v = (rval); \
(lval) = __v; \
} while (0)
#else
#define STRICT_ASSIGN(type, lval, rval) ((lval) = (type)(rval))
#endif
/* complex */
union dcomplex {
double complex z;
double a[2];
};
union fcomplex {
float complex z;
float a[2];
};
union lcomplex {
long double complex z;
long double a[2];
};
// FIXME: move to complex.h ?
#define creal(z) ((double)(z))
#define crealf(z) ((float)(z))
#define creall(z) ((long double)(z))
#define cimag(z) ((union dcomplex){(z)}.a[1])
#define cimagf(z) ((union fcomplex){(z)}.a[1])
#define cimagl(z) ((union lcomplex){(z)}.a[1])
/* x + y*I is not supported properly by gcc */
#define cpack(x,y) ((union dcomplex){.a={(x),(y)}}.z)
#define cpackf(x,y) ((union fcomplex){.a={(x),(y)}}.z)
#define cpackl(x,y) ((union lcomplex){.a={(x),(y)}}.z)
#endif
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