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97 lines
3.6 KiB
97 lines
3.6 KiB
7 years ago
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// Portions of this file are extracted from musl-1.1.16 src/internal/libm.h
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/* origin: FreeBSD /usr/src/lib/msun/src/math_private.h */
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/*
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* ====================================================
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* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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*
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* Developed at SunPro, a Sun Microsystems, Inc. business.
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* Permission to use, copy, modify, and distribute this
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* software is freely granted, provided that this notice
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* is preserved.
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* ====================================================
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*/
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#include <stdint.h>
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#include <math.h>
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#define FLT_EVAL_METHOD 0
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#define FORCE_EVAL(x) do { \
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if (sizeof(x) == sizeof(float)) { \
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volatile float __x; \
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__x = (x); \
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(void)__x; \
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} else if (sizeof(x) == sizeof(double)) { \
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volatile double __x; \
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__x = (x); \
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(void)__x; \
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} else { \
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volatile long double __x; \
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__x = (x); \
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(void)__x; \
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} \
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} while(0)
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/* Get two 32 bit ints from a double. */
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#define EXTRACT_WORDS(hi,lo,d) \
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do { \
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union {double f; uint64_t i;} __u; \
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__u.f = (d); \
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(hi) = __u.i >> 32; \
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(lo) = (uint32_t)__u.i; \
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} while (0)
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/* Get the more significant 32 bit int from a double. */
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#define GET_HIGH_WORD(hi,d) \
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do { \
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union {double f; uint64_t i;} __u; \
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__u.f = (d); \
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(hi) = __u.i >> 32; \
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} while (0)
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/* Get the less significant 32 bit int from a double. */
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#define GET_LOW_WORD(lo,d) \
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do { \
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union {double f; uint64_t i;} __u; \
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__u.f = (d); \
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(lo) = (uint32_t)__u.i; \
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} while (0)
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/* Set a double from two 32 bit ints. */
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#define INSERT_WORDS(d,hi,lo) \
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do { \
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union {double f; uint64_t i;} __u; \
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__u.i = ((uint64_t)(hi)<<32) | (uint32_t)(lo); \
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(d) = __u.f; \
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} while (0)
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/* Set the more significant 32 bits of a double from an int. */
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#define SET_HIGH_WORD(d,hi) \
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do { \
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union {double f; uint64_t i;} __u; \
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__u.f = (d); \
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__u.i &= 0xffffffff; \
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__u.i |= (uint64_t)(hi) << 32; \
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(d) = __u.f; \
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} while (0)
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/* Set the less significant 32 bits of a double from an int. */
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#define SET_LOW_WORD(d,lo) \
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do { \
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union {double f; uint64_t i;} __u; \
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__u.f = (d); \
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__u.i &= 0xffffffff00000000ull; \
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__u.i |= (uint32_t)(lo); \
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(d) = __u.f; \
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} while (0)
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#define DBL_EPSILON 2.22044604925031308085e-16
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int __rem_pio2(double, double*);
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int __rem_pio2_large(double*, double*, int, int, int);
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double __sin(double, double, int);
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double __cos(double, double);
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double __tan(double, double, int);
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double __expo2(double);
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