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circuitpython/lib/libm_dbl/libm.h

96 lines
3.6 KiB

// Portions of this file are extracted from musl-1.1.16 src/internal/libm.h
/* 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.
* ====================================================
*/
#include <stdint.h>
#include <math.h>
#define FLT_EVAL_METHOD 0
#define FORCE_EVAL(x) do { \
if (sizeof(x) == sizeof(float)) { \
volatile float __x; \
__x = (x); \
(void)__x; \
} else if (sizeof(x) == sizeof(double)) { \
volatile double __x; \
__x = (x); \
(void)__x; \
} else { \
volatile long double __x; \
__x = (x); \
(void)__x; \
} \
} while(0)
/* Get two 32 bit ints from a double. */
#define EXTRACT_WORDS(hi,lo,d) \
do { \
union {double f; uint64_t i;} __u; \
__u.f = (d); \
(hi) = __u.i >> 32; \
(lo) = (uint32_t)__u.i; \
} while (0)
/* Get the more significant 32 bit int from a double. */
#define GET_HIGH_WORD(hi,d) \
do { \
union {double f; uint64_t i;} __u; \
__u.f = (d); \
(hi) = __u.i >> 32; \
} while (0)
/* Get the less significant 32 bit int from a double. */
#define GET_LOW_WORD(lo,d) \
do { \
union {double f; uint64_t i;} __u; \
__u.f = (d); \
(lo) = (uint32_t)__u.i; \
} while (0)
/* Set a double from two 32 bit ints. */
#define INSERT_WORDS(d,hi,lo) \
do { \
union {double f; uint64_t i;} __u; \
__u.i = ((uint64_t)(hi)<<32) | (uint32_t)(lo); \
(d) = __u.f; \
} while (0)
/* Set the more significant 32 bits of a double from an int. */
#define SET_HIGH_WORD(d,hi) \
do { \
union {double f; uint64_t i;} __u; \
__u.f = (d); \
__u.i &= 0xffffffff; \
__u.i |= (uint64_t)(hi) << 32; \
(d) = __u.f; \
} while (0)
/* Set the less significant 32 bits of a double from an int. */
#define SET_LOW_WORD(d,lo) \
do { \
union {double f; uint64_t i;} __u; \
__u.f = (d); \
__u.i &= 0xffffffff00000000ull; \
__u.i |= (uint32_t)(lo); \
(d) = __u.f; \
} while (0)
#define DBL_EPSILON 2.22044604925031308085e-16
int __rem_pio2(double, double*);
int __rem_pio2_large(double*, double*, int, int, int);
double __sin(double, double, int);
double __cos(double, double);
double __tan(double, double, int);
double __expo2(double);