mirror of
https://github.com/fluencelabs/musl
synced 2025-07-02 16:12:02 +00:00
af5f6d9556
new ldshape union, ld128 support is kept, code that used the old ldshape union was rewritten (IEEEl2bits union of freebsd libm is not touched yet) ld80 __fpclassifyl no longer tries to handle invalid representation
200 lines
7.0 KiB
C
200 lines
7.0 KiB
C
/* 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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#ifndef _LIBM_H
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#define _LIBM_H
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#include <stdint.h>
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#include <float.h>
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#include <math.h>
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#include <complex.h>
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#include <endian.h>
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#include "longdbl.h"
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#include "libc.h"
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union fshape {
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float value;
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uint32_t bits;
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};
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union dshape {
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double value;
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uint64_t bits;
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};
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#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
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#elif LDBL_MANT_DIG == 64 && LDBL_MAX_EXP == 16384 && __BYTE_ORDER == __LITTLE_ENDIAN
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union ldshape {
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long double f;
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struct {
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uint64_t m;
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uint16_t se;
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} i;
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};
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#elif LDBL_MANT_DIG == 113 && LDBL_MAX_EXP == 16384 && __BYTE_ORDER == __LITTLE_ENDIAN
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union ldshape {
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long double f;
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struct {
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uint64_t lo;
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uint32_t mid;
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uint16_t top;
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uint16_t se;
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} i;
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struct {
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uint64_t lo;
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uint64_t hi;
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} i2;
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};
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#else
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#error Unsupported long double representation
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#endif
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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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} else if (sizeof(x) == sizeof(double)) { \
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volatile double __x; \
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__x = (x); \
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} else { \
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volatile long double __x; \
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__x = (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 dshape __u; \
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__u.value = (d); \
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(hi) = __u.bits >> 32; \
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(lo) = (uint32_t)__u.bits; \
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} while (0)
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/* Get a 64 bit int from a double. */
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#define EXTRACT_WORD64(i,d) \
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do { \
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union dshape __u; \
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__u.value = (d); \
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(i) = __u.bits; \
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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(i,d) \
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do { \
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union dshape __u; \
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__u.value = (d); \
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(i) = __u.bits >> 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(i,d) \
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do { \
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union dshape __u; \
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__u.value = (d); \
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(i) = (uint32_t)__u.bits; \
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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 dshape __u; \
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__u.bits = ((uint64_t)(hi) << 32) | (uint32_t)(lo); \
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(d) = __u.value; \
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} while (0)
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/* Set a double from a 64 bit int. */
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#define INSERT_WORD64(d,i) \
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do { \
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union dshape __u; \
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__u.bits = (i); \
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(d) = __u.value; \
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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 dshape __u; \
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__u.value = (d); \
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__u.bits &= 0xffffffff; \
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__u.bits |= (uint64_t)(hi) << 32; \
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(d) = __u.value; \
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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 dshape __u; \
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__u.value = (d); \
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__u.bits &= 0xffffffff00000000ull; \
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__u.bits |= (uint32_t)(lo); \
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(d) = __u.value; \
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} while (0)
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/* Get a 32 bit int from a float. */
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#define GET_FLOAT_WORD(i,d) \
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do { \
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union fshape __u; \
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__u.value = (d); \
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(i) = __u.bits; \
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} while (0)
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/* Set a float from a 32 bit int. */
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#define SET_FLOAT_WORD(d,i) \
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do { \
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union fshape __u; \
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__u.bits = (i); \
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(d) = __u.value; \
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} while (0)
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/* fdlibm kernel functions */
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int __rem_pio2_large(double*,double*,int,int,int);
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int __rem_pio2(double,double*);
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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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double complex __ldexp_cexp(double complex,int);
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int __rem_pio2f(float,double*);
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float __sindf(double);
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float __cosdf(double);
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float __tandf(double,int);
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float __expo2f(float);
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float complex __ldexp_cexpf(float complex,int);
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int __rem_pio2l(long double, long double *);
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long double __sinl(long double, long double, int);
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long double __cosl(long double, long double);
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long double __tanl(long double, long double, int);
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/* polynomial evaluation */
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long double __polevll(long double, const long double *, int);
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long double __p1evll(long double, const long double *, int);
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#if 0
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/* Attempt to get strict C99 semantics for assignment with non-C99 compilers. */
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#define STRICT_ASSIGN(type, lval, rval) do { \
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volatile type __v = (rval); \
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(lval) = __v; \
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} while (0)
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#else
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/* Should work with -fexcess-precision=standard (>=gcc-4.5) or -ffloat-store */
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#define STRICT_ASSIGN(type, lval, rval) ((lval) = (type)(rval))
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#endif
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#endif
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