[thirdparty/glibc.git] / sysdeps / ia64 / fpu / math_ldbl.h

/* Manipulation of the bit representation of 'long double' quantities.
   Copyright (C) 2000-2024 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <https://www.gnu.org/licenses/>.  */

#ifndef _MATH_LDBL_H_
#define _MATH_LDBL_H_ 1

#include <stdint.h>
#include <endian.h>

/* A union which permits us to convert between a long double and
   three 32 bit ints.  */

#if __FLOAT_WORD_ORDER == __BIG_ENDIAN

typedef union
{
  long double value;
  struct
  {
    unsigned int empty0:32;
    int sign_exponent:16;
    unsigned int empty1:16;
    uint32_t msw;
    uint32_t lsw;
  } parts;
} ieee_long_double_shape_type;

#endif

#if __FLOAT_WORD_ORDER == __LITTLE_ENDIAN

typedef union
{
  long double value;
  struct
  {
    uint32_t lsw;
    uint32_t msw;
    int sign_exponent:16;
    unsigned int empty1:16;
    unsigned int empty0:32;
  } parts;
} ieee_long_double_shape_type;

#endif

/* Get three 32 bit ints from a double.  */

#define GET_LDOUBLE_WORDS(exp,ix0,ix1,d)			\
do {								\
  ieee_long_double_shape_type ew_u;				\
  ew_u.value = (d);						\
  (exp) = ew_u.parts.sign_exponent;				\
  (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,exp,ix0,ix1)			\
do {								\
  ieee_long_double_shape_type iw_u;				\
  iw_u.parts.sign_exponent = (exp);				\
  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_long_double_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_long_double_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(exp,d)					\
do {								\
  ieee_long_double_shape_type ge_u;				\
  ge_u.value = (d);						\
  (exp) = ge_u.parts.sign_exponent;				\
} while (0)

/* Set exponent of a long double from an int.  */

#define SET_LDOUBLE_EXP(d,exp)					\
do {								\
  ieee_long_double_shape_type se_u;				\
  se_u.value = (d);						\
  se_u.parts.sign_exponent = (exp);				\
  (d) = se_u.value;						\
} while (0)

#endif /* math_ldbl.h */
Commit	Line	Data
963394a2	1	/* Manipulation of the bit representation of 'long double' quantities.
dff8da6b	2	Copyright (C) 2000-2024 Free Software Foundation, Inc.
963394a2 ZW	3	This file is part of the GNU C Library.
	4
	5	The GNU C Library is free software; you can redistribute it and/or
	6	modify it under the terms of the GNU Lesser General Public
	7	License as published by the Free Software Foundation; either
	8	version 2.1 of the License, or (at your option) any later version.
	9
	10	The GNU C Library is distributed in the hope that it will be useful,
	11	but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	Lesser General Public License for more details.
	14
	15	You should have received a copy of the GNU Lesser General Public
	16	License along with the GNU C Library; if not, see
5a82c748	17	<https://www.gnu.org/licenses/>. */
963394a2 ZW	18
	19	#ifndef _MATH_LDBL_H_
	20	#define _MATH_LDBL_H_ 1
	21
	22	#include <stdint.h>
	23	#include <endian.h>
d5efd131 MF	24
	25	/* A union which permits us to convert between a long double and
	26	three 32 bit ints. */
	27
963394a2	28	#if __FLOAT_WORD_ORDER == __BIG_ENDIAN
d5efd131 MF	29
	30	typedef union
	31	{
	32	long double value;
	33	struct
	34	{
	35	unsigned int empty0:32;
	36	int sign_exponent:16;
	37	unsigned int empty1:16;
963394a2 ZW	38	uint32_t msw;
963394a2 ZW	39	uint32_t lsw;
d5efd131 MF	40	} parts;
	41	} ieee_long_double_shape_type;
	42
	43	#endif
	44
963394a2	45	#if __FLOAT_WORD_ORDER == __LITTLE_ENDIAN
d5efd131 MF	46
	47	typedef union
	48	{
	49	long double value;
	50	struct
	51	{
963394a2 ZW	52	uint32_t lsw;
963394a2 ZW	53	uint32_t msw;
d5efd131 MF	54	int sign_exponent:16;
	55	unsigned int empty1:16;
	56	unsigned int empty0:32;
	57	} parts;
	58	} ieee_long_double_shape_type;
	59
	60	#endif
	61
	62	/* Get three 32 bit ints from a double. */
	63
	64	#define GET_LDOUBLE_WORDS(exp,ix0,ix1,d) \
	65	do { \
	66	ieee_long_double_shape_type ew_u; \
	67	ew_u.value = (d); \
	68	(exp) = ew_u.parts.sign_exponent; \
	69	(ix0) = ew_u.parts.msw; \
	70	(ix1) = ew_u.parts.lsw; \
	71	} while (0)
	72
	73	/* Set a double from two 32 bit ints. */
	74
	75	#define SET_LDOUBLE_WORDS(d,exp,ix0,ix1) \
	76	do { \
	77	ieee_long_double_shape_type iw_u; \
	78	iw_u.parts.sign_exponent = (exp); \
	79	iw_u.parts.msw = (ix0); \
	80	iw_u.parts.lsw = (ix1); \
	81	(d) = iw_u.value; \
	82	} while (0)
	83
	84	/* Get the more significant 32 bits of a long double mantissa. */
	85
	86	#define GET_LDOUBLE_MSW(v,d) \
	87	do { \
	88	ieee_long_double_shape_type sh_u; \
	89	sh_u.value = (d); \
	90	(v) = sh_u.parts.msw; \
	91	} while (0)
	92
	93	/* Set the more significant 32 bits of a long double mantissa from an int. */
	94
	95	#define SET_LDOUBLE_MSW(d,v) \
	96	do { \
	97	ieee_long_double_shape_type sh_u; \
	98	sh_u.value = (d); \
	99	sh_u.parts.msw = (v); \
	100	(d) = sh_u.value; \
	101	} while (0)
	102
	103	/* Get int from the exponent of a long double. */
	104
	105	#define GET_LDOUBLE_EXP(exp,d) \
	106	do { \
	107	ieee_long_double_shape_type ge_u; \
	108	ge_u.value = (d); \
	109	(exp) = ge_u.parts.sign_exponent; \
	110	} while (0)
	111
	112	/* Set exponent of a long double from an int. */
	113
	114	#define SET_LDOUBLE_EXP(d,exp) \
	115	do { \
	116	ieee_long_double_shape_type se_u; \
	117	se_u.value = (d); \
118	se_u.parts.sign_exponent = (exp); \
119	(d) = se_u.value; \
120	} while (0)
963394a2 ZW	121
963394a2 ZW	122	#endif /* math_ldbl.h */