math_private_openbsd.h

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/*  $OpenBSD: math_private.h,v 1.17 2014/06/02 19:31:17 kettenis Exp $  */
/*
 * ====================================================
 * 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
 */
 
#ifndef _MATH_PRIVATE_OPENBSD_H_
#define _MATH_PRIVATE_OPENBSD_H_
 
#if __FLOAT_WORD_ORDER__ == __ORDER_BIG_ENDIAN__
 
typedef union
{
  long double value;
  struct {
    u_int32_t mswhi;
    u_int32_t mswlo;
    u_int32_t lswhi;
    u_int32_t lswlo;
  } parts32;
  struct {
    u_int64_t msw;
    u_int64_t lsw;
  } parts64;
} ieee_quad_shape_type;
 
#endif
 
#if __FLOAT_WORD_ORDER__ == __ORDER_LITTLE_ENDIAN__
 
typedef union
{
  long double value;
  struct {
    u_int32_t lswlo;
    u_int32_t lswhi;
    u_int32_t mswlo;
    u_int32_t mswhi;
  } parts32;
  struct {
    u_int64_t lsw;
    u_int64_t msw;
  } parts64;
} ieee_quad_shape_type;
 
#endif
 
/* Get two 64 bit ints from a long double.  */
 
#define GET_LDOUBLE_WORDS64(ix0,ix1,d)              \
do {                                \
  ieee_quad_shape_type qw_u;                    \
  qw_u.value = (d);                     \
  (ix0) = qw_u.parts64.msw;                 \
  (ix1) = qw_u.parts64.lsw;                 \
} while (0)
 
/* Set a long double from two 64 bit ints.  */
 
#define SET_LDOUBLE_WORDS64(d,ix0,ix1)              \
do {                                \
  ieee_quad_shape_type qw_u;                    \
  qw_u.parts64.msw = (ix0);                 \
  qw_u.parts64.lsw = (ix1);                 \
  (d) = qw_u.value;                     \
} while (0)
 
/* Get the more significant 64 bits of a long double mantissa.  */
 
#define GET_LDOUBLE_MSW64(v,d)                  \
do {                                \
  ieee_quad_shape_type sh_u;                    \
  sh_u.value = (d);                     \
  (v) = sh_u.parts64.msw;                   \
} while (0)
 
/* Set the more significant 64 bits of a long double mantissa from an int.  */
 
#define SET_LDOUBLE_MSW64(d,v)                  \
do {                                \
  ieee_quad_shape_type sh_u;                    \
  sh_u.value = (d);                     \
  sh_u.parts64.msw = (v);                   \
  (d) = sh_u.value;                     \
} while (0)
 
/* Get the least significant 64 bits of a long double mantissa.  */
 
#define GET_LDOUBLE_LSW64(v,d)                  \
do {                                \
  ieee_quad_shape_type sh_u;                    \
  sh_u.value = (d);                     \
  (v) = sh_u.parts64.lsw;                   \
} while (0)
 
/* A union which permits us to convert between a long double and
   three 32 bit ints.  */
 
#if __FLOAT_WORD_ORDER__ == __ORDER_BIG_ENDIAN__
 
typedef union
{
  long double value;
  struct {
#ifdef __LP64__
    int padh:32;
#endif
    int exp:16;
    int padl:16;
    u_int32_t msw;
    u_int32_t lsw;
  } parts;
} ieee_extended_shape_type;
 
#endif
 
#if __FLOAT_WORD_ORDER__ == __ORDER_LITTLE_ENDIAN__
 
typedef union
{
  long double value;
  struct {
    u_int32_t lsw;
    u_int32_t msw;
    int exp:16;
    int padl:16;
#ifdef __LP64__
    int padh:32;
#endif
  } parts;
} ieee_extended_shape_type;
 
#endif
 
/* Get three 32 bit ints from a double.  */
 
#define GET_LDOUBLE_WORDS(se,ix0,ix1,d)             \
do {                                \
  ieee_extended_shape_type ew_u;                \
  ew_u.value = (d);                     \
  (se) = ew_u.parts.exp;                    \
  (ix0) = ew_u.parts.msw;                   \
  (ix1) = ew_u.parts.lsw;                   \
} while (0)
 
/* Set a double from two 32 bit ints.  */
 
#define SET_LDOUBLE_WORDS(d,se,ix0,ix1)             \
do {                                \
  ieee_extended_shape_type iw_u;                \
  iw_u.parts.exp = (se);                    \
  iw_u.parts.msw = (ix0);                   \
  iw_u.parts.lsw = (ix1);                   \
  (d) = iw_u.value;                     \
} while (0)
 
/* Get the more significant 32 bits of a long double mantissa.  */
 
#define GET_LDOUBLE_MSW(v,d)                    \
do {                                \
  ieee_extended_shape_type sh_u;                \
  sh_u.value = (d);                     \
  (v) = sh_u.parts.msw;                     \
} while (0)
 
/* Set the more significant 32 bits of a long double mantissa from an int.  */
 
#define SET_LDOUBLE_MSW(d,v)                    \
do {                                \
  ieee_extended_shape_type sh_u;                \
  sh_u.value = (d);                     \
  sh_u.parts.msw = (v);                     \
  (d) = sh_u.value;                     \
} while (0)
 
/* Get int from the exponent of a long double.  */
 
#define GET_LDOUBLE_EXP(se,d)                   \
do {                                \
  ieee_extended_shape_type ge_u;                \
  ge_u.value = (d);                     \
  (se) = ge_u.parts.exp;                    \
} while (0)
 
/* Set exponent of a long double from an int.  */
 
#define SET_LDOUBLE_EXP(d,se)                   \
do {                                \
  ieee_extended_shape_type se_u;                \
  se_u.value = (d);                     \
  se_u.parts.exp = (se);                    \
  (d) = se_u.value;                     \
} while (0)
 
/*
 * Common routine to process the arguments to nan(), nanf(), and nanl().
 */
void __scan_nan(uint32_t *__words, int __num_words, const char *__s);
 
/*
 * Functions internal to the math package, yet not static.
 */
double __exp__D(double, double);
struct Double __log__D(double);
long double __p1evll(long double, void *, int);
long double __polevll(long double, void *, int);
 
#endif /* _MATH_PRIVATE_OPENBSD_H_ */