[thirdparty/glibc.git] / soft-fp / double.h

/* Software floating-point emulation.
   Definitions for IEEE Double Precision
   Copyright (C) 1997,1998,1999 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Richard Henderson (rth@cygnus.com),
		  Jakub Jelinek (jj@ultra.linux.cz),
		  David S. Miller (davem@redhat.com) and
		  Peter Maydell (pmaydell@chiark.greenend.org.uk).

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public License as
   published by the Free Software Foundation; either version 2 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If
   not, write to the Free Software Foundation, Inc.,
   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

#if _FP_W_TYPE_SIZE < 32
#error "Here's a nickel kid.  Go buy yourself a real computer."
#endif

#if _FP_W_TYPE_SIZE < 64
#define _FP_FRACTBITS_D		(2 * _FP_W_TYPE_SIZE)
#else
#define _FP_FRACTBITS_D		_FP_W_TYPE_SIZE
#endif

#define _FP_FRACBITS_D		53
#define _FP_FRACXBITS_D		(_FP_FRACTBITS_D - _FP_FRACBITS_D)
#define _FP_WFRACBITS_D		(_FP_WORKBITS + _FP_FRACBITS_D)
#define _FP_WFRACXBITS_D	(_FP_FRACTBITS_D - _FP_WFRACBITS_D)
#define _FP_EXPBITS_D		11
#define _FP_EXPBIAS_D		1023
#define _FP_EXPMAX_D		2047

#define _FP_QNANBIT_D		\
	((_FP_W_TYPE)1 << (_FP_FRACBITS_D-2) % _FP_W_TYPE_SIZE)
#define _FP_IMPLBIT_D		\
	((_FP_W_TYPE)1 << (_FP_FRACBITS_D-1) % _FP_W_TYPE_SIZE)
#define _FP_OVERFLOW_D		\
	((_FP_W_TYPE)1 << _FP_WFRACBITS_D % _FP_W_TYPE_SIZE)

#if _FP_W_TYPE_SIZE < 64

union _FP_UNION_D
{
  double flt;
  struct {
#if __BYTE_ORDER == __BIG_ENDIAN
    unsigned sign  : 1;
    unsigned exp   : _FP_EXPBITS_D;
    unsigned frac1 : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0) - _FP_W_TYPE_SIZE;
    unsigned frac0 : _FP_W_TYPE_SIZE;
#else
    unsigned frac0 : _FP_W_TYPE_SIZE;
    unsigned frac1 : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0) - _FP_W_TYPE_SIZE;
    unsigned exp   : _FP_EXPBITS_D;
    unsigned sign  : 1;
#endif
  } bits __attribute__((packed));
};

#define FP_DECL_D(X)		_FP_DECL(2,X)
#define FP_UNPACK_RAW_D(X,val)	_FP_UNPACK_RAW_2(D,X,val)
#define FP_UNPACK_RAW_DP(X,val)	_FP_UNPACK_RAW_2_P(D,X,val)
#define FP_PACK_RAW_D(val,X)	_FP_PACK_RAW_2(D,val,X)
#define FP_PACK_RAW_DP(val,X)		\
  do {					\
    if (!FP_INHIBIT_RESULTS)		\
      _FP_PACK_RAW_2_P(D,val,X);	\
  } while (0)

#define FP_UNPACK_D(X,val)		\
  do {					\
    _FP_UNPACK_RAW_2(D,X,val);		\
    _FP_UNPACK_CANONICAL(D,2,X);	\
  } while (0)

#define FP_UNPACK_DP(X,val)		\
  do {					\
    _FP_UNPACK_RAW_2_P(D,X,val);	\
    _FP_UNPACK_CANONICAL(D,2,X);	\
  } while (0)

#define FP_PACK_D(val,X)		\
  do {					\
    _FP_PACK_CANONICAL(D,2,X);		\
    _FP_PACK_RAW_2(D,val,X);		\
  } while (0)

#define FP_PACK_DP(val,X)		\
  do {					\
    _FP_PACK_CANONICAL(D,2,X);		\
    if (!FP_INHIBIT_RESULTS)		\
      _FP_PACK_RAW_2_P(D,val,X);	\
  } while (0)

#define FP_ISSIGNAN_D(X)		_FP_ISSIGNAN(D,2,X)
#define FP_NEG_D(R,X)			_FP_NEG(D,2,R,X)
#define FP_ADD_D(R,X,Y)			_FP_ADD(D,2,R,X,Y)
#define FP_SUB_D(R,X,Y)			_FP_SUB(D,2,R,X,Y)
#define FP_MUL_D(R,X,Y)			_FP_MUL(D,2,R,X,Y)
#define FP_DIV_D(R,X,Y)			_FP_DIV(D,2,R,X,Y)
#define FP_SQRT_D(R,X)			_FP_SQRT(D,2,R,X)
#define _FP_SQRT_MEAT_D(R,S,T,X,Q)	_FP_SQRT_MEAT_2(R,S,T,X,Q)

#define FP_CMP_D(r,X,Y,un)	_FP_CMP(D,2,r,X,Y,un)
#define FP_CMP_EQ_D(r,X,Y)	_FP_CMP_EQ(D,2,r,X,Y)

#define FP_TO_INT_D(r,X,rsz,rsg)	_FP_TO_INT(D,2,r,X,rsz,rsg)
#define FP_FROM_INT_D(X,r,rs,rt)	_FP_FROM_INT(D,2,X,r,rs,rt)

#define _FP_FRAC_HIGH_D(X)	_FP_FRAC_HIGH_2(X)
#define _FP_FRAC_HIGH_RAW_D(X)	_FP_FRAC_HIGH_2(X)

#else

union _FP_UNION_D
{
  double flt;
  struct {
#if __BYTE_ORDER == __BIG_ENDIAN
    unsigned sign : 1;
    unsigned exp  : _FP_EXPBITS_D;
    unsigned long frac : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0);
#else
    unsigned long frac : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0);
    unsigned exp  : _FP_EXPBITS_D;
    unsigned sign : 1;
#endif
  } bits __attribute__((packed));
};

#define FP_DECL_D(X)		_FP_DECL(1,X)
#define FP_UNPACK_RAW_D(X,val)	_FP_UNPACK_RAW_1(D,X,val)
#define FP_UNPACK_RAW_DP(X,val)	_FP_UNPACK_RAW_1_P(D,X,val)
#define FP_PACK_RAW_D(val,X)	_FP_PACK_RAW_1(D,val,X)
#define FP_PACK_RAW_DP(val,X)		\
  do {					\
    if (!FP_INHIBIT_RESULTS)		\
      _FP_PACK_RAW_1_P(D,val,X);	\
  } while (0)

#define FP_UNPACK_D(X,val)		\
  do {					\
    _FP_UNPACK_RAW_1(D,X,val);		\
    _FP_UNPACK_CANONICAL(D,1,X);	\
  } while (0)

#define FP_UNPACK_DP(X,val)		\
  do {					\
    _FP_UNPACK_RAW_1_P(D,X,val);	\
    _FP_UNPACK_CANONICAL(D,1,X);	\
  } while (0)

#define FP_PACK_D(val,X)		\
  do {					\
    _FP_PACK_CANONICAL(D,1,X);		\
    _FP_PACK_RAW_1(D,val,X);		\
  } while (0)

#define FP_PACK_DP(val,X)		\
  do {					\
    _FP_PACK_CANONICAL(D,1,X);		\
    if (!FP_INHIBIT_RESULTS)		\
      _FP_PACK_RAW_1_P(D,val,X);	\
  } while (0)

#define FP_ISSIGNAN_D(X)		_FP_ISSIGNAN(D,1,X)
#define FP_NEG_D(R,X)			_FP_NEG(D,1,R,X)
#define FP_ADD_D(R,X,Y)			_FP_ADD(D,1,R,X,Y)
#define FP_SUB_D(R,X,Y)			_FP_SUB(D,1,R,X,Y)
#define FP_MUL_D(R,X,Y)			_FP_MUL(D,1,R,X,Y)
#define FP_DIV_D(R,X,Y)			_FP_DIV(D,1,R,X,Y)
#define FP_SQRT_D(R,X)			_FP_SQRT(D,1,R,X)
#define _FP_SQRT_MEAT_D(R,S,T,X,Q)	_FP_SQRT_MEAT_1(R,S,T,X,Q)

/* The implementation of _FP_MUL_D and _FP_DIV_D should be chosen by
   the target machine.  */

#define FP_CMP_D(r,X,Y,un)	_FP_CMP(D,1,r,X,Y,un)
#define FP_CMP_EQ_D(r,X,Y)	_FP_CMP_EQ(D,1,r,X,Y)

#define FP_TO_INT_D(r,X,rsz,rsg)	_FP_TO_INT(D,1,r,X,rsz,rsg)
#define FP_FROM_INT_D(X,r,rs,rt)	_FP_FROM_INT(D,1,X,r,rs,rt)

#define _FP_FRAC_HIGH_D(X)	_FP_FRAC_HIGH_1(X)
#define _FP_FRAC_HIGH_RAW_D(X)	_FP_FRAC_HIGH_1(X)

#endif /* W_TYPE_SIZE < 64 */
Commit	Line	Data
d876f532 UD	1	/* Software floating-point emulation.
	2	Definitions for IEEE Double Precision
	3	Copyright (C) 1997,1998,1999 Free Software Foundation, Inc.
	4	This file is part of the GNU C Library.
	5	Contributed by Richard Henderson (rth@cygnus.com),
	6	Jakub Jelinek (jj@ultra.linux.cz),
	7	David S. Miller (davem@redhat.com) and
	8	Peter Maydell (pmaydell@chiark.greenend.org.uk).
	9
	10	The GNU C Library is free software; you can redistribute it and/or
	11	modify it under the terms of the GNU Library General Public License as
	12	published by the Free Software Foundation; either version 2 of the
	13	License, or (at your option) any later version.
	14
	15	The GNU C Library is distributed in the hope that it will be useful,
	16	but WITHOUT ANY WARRANTY; without even the implied warranty of
	17	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	18	Library General Public License for more details.
	19
	20	You should have received a copy of the GNU Library General Public
	21	License along with the GNU C Library; see the file COPYING.LIB. If
	22	not, write to the Free Software Foundation, Inc.,
	23	59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
	24
	25	#if _FP_W_TYPE_SIZE < 32
	26	#error "Here's a nickel kid. Go buy yourself a real computer."
	27	#endif
	28
	29	#if _FP_W_TYPE_SIZE < 64
	30	#define _FP_FRACTBITS_D (2 * _FP_W_TYPE_SIZE)
	31	#else
	32	#define _FP_FRACTBITS_D _FP_W_TYPE_SIZE
	33	#endif
	34
	35	#define _FP_FRACBITS_D 53
	36	#define _FP_FRACXBITS_D (_FP_FRACTBITS_D - _FP_FRACBITS_D)
	37	#define _FP_WFRACBITS_D (_FP_WORKBITS + _FP_FRACBITS_D)
	38	#define _FP_WFRACXBITS_D (_FP_FRACTBITS_D - _FP_WFRACBITS_D)
	39	#define _FP_EXPBITS_D 11
	40	#define _FP_EXPBIAS_D 1023
	41	#define _FP_EXPMAX_D 2047
	42
	43	#define _FP_QNANBIT_D \
	44	((_FP_W_TYPE)1 << (_FP_FRACBITS_D-2) % _FP_W_TYPE_SIZE)
	45	#define _FP_IMPLBIT_D \
	46	((_FP_W_TYPE)1 << (_FP_FRACBITS_D-1) % _FP_W_TYPE_SIZE)
	47	#define _FP_OVERFLOW_D \
	48	((_FP_W_TYPE)1 << _FP_WFRACBITS_D % _FP_W_TYPE_SIZE)
	49
	50	#if _FP_W_TYPE_SIZE < 64
	51
	52	union _FP_UNION_D
	53	{
	54	double flt;
	55	struct {
	56	#if __BYTE_ORDER == __BIG_ENDIAN
	57	unsigned sign : 1;
	58	unsigned exp : _FP_EXPBITS_D;
	59	unsigned frac1 : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0) - _FP_W_TYPE_SIZE;
	60	unsigned frac0 : _FP_W_TYPE_SIZE;
	61	#else
	62	unsigned frac0 : _FP_W_TYPE_SIZE;
	63	unsigned frac1 : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0) - _FP_W_TYPE_SIZE;
	64	unsigned exp : _FP_EXPBITS_D;
65	unsigned sign : 1;
66	#endif
67	} bits __attribute__((packed));
68	};
69
70	#define FP_DECL_D(X) _FP_DECL(2,X)
71	#define FP_UNPACK_RAW_D(X,val) _FP_UNPACK_RAW_2(D,X,val)
72	#define FP_UNPACK_RAW_DP(X,val) _FP_UNPACK_RAW_2_P(D,X,val)
73	#define FP_PACK_RAW_D(val,X) _FP_PACK_RAW_2(D,val,X)
74	#define FP_PACK_RAW_DP(val,X) \
75	do { \
76	if (!FP_INHIBIT_RESULTS) \
77	_FP_PACK_RAW_2_P(D,val,X); \
78	} while (0)
79
80	#define FP_UNPACK_D(X,val) \
81	do { \
82	_FP_UNPACK_RAW_2(D,X,val); \
83	_FP_UNPACK_CANONICAL(D,2,X); \
84	} while (0)
85
86	#define FP_UNPACK_DP(X,val) \
87	do { \
88	_FP_UNPACK_RAW_2_P(D,X,val); \
89	_FP_UNPACK_CANONICAL(D,2,X); \
90	} while (0)
91
92	#define FP_PACK_D(val,X) \
93	do { \
94	_FP_PACK_CANONICAL(D,2,X); \
95	_FP_PACK_RAW_2(D,val,X); \
96	} while (0)
97
98	#define FP_PACK_DP(val,X) \
99	do { \
100	_FP_PACK_CANONICAL(D,2,X); \
101	if (!FP_INHIBIT_RESULTS) \
102	_FP_PACK_RAW_2_P(D,val,X); \
103	} while (0)
104
105	#define FP_ISSIGNAN_D(X) _FP_ISSIGNAN(D,2,X)
106	#define FP_NEG_D(R,X) _FP_NEG(D,2,R,X)
107	#define FP_ADD_D(R,X,Y) _FP_ADD(D,2,R,X,Y)
108	#define FP_SUB_D(R,X,Y) _FP_SUB(D,2,R,X,Y)
109	#define FP_MUL_D(R,X,Y) _FP_MUL(D,2,R,X,Y)
110	#define FP_DIV_D(R,X,Y) _FP_DIV(D,2,R,X,Y)
111	#define FP_SQRT_D(R,X) _FP_SQRT(D,2,R,X)
112	#define _FP_SQRT_MEAT_D(R,S,T,X,Q) _FP_SQRT_MEAT_2(R,S,T,X,Q)
113
114	#define FP_CMP_D(r,X,Y,un) _FP_CMP(D,2,r,X,Y,un)
115	#define FP_CMP_EQ_D(r,X,Y) _FP_CMP_EQ(D,2,r,X,Y)
116
117	#define FP_TO_INT_D(r,X,rsz,rsg) _FP_TO_INT(D,2,r,X,rsz,rsg)
118	#define FP_FROM_INT_D(X,r,rs,rt) _FP_FROM_INT(D,2,X,r,rs,rt)
119
120	#define _FP_FRAC_HIGH_D(X) _FP_FRAC_HIGH_2(X)
121	#define _FP_FRAC_HIGH_RAW_D(X) _FP_FRAC_HIGH_2(X)
122
123	#else
124
125	union _FP_UNION_D
126	{
127	double flt;
128	struct {
129	#if __BYTE_ORDER == __BIG_ENDIAN
130	unsigned sign : 1;
131	unsigned exp : _FP_EXPBITS_D;
132	unsigned long frac : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0);
133	#else
134	unsigned long frac : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0);
135	unsigned exp : _FP_EXPBITS_D;
136	unsigned sign : 1;
137	#endif
138	} bits __attribute__((packed));
139	};
140
141	#define FP_DECL_D(X) _FP_DECL(1,X)
142	#define FP_UNPACK_RAW_D(X,val) _FP_UNPACK_RAW_1(D,X,val)
143	#define FP_UNPACK_RAW_DP(X,val) _FP_UNPACK_RAW_1_P(D,X,val)
144	#define FP_PACK_RAW_D(val,X) _FP_PACK_RAW_1(D,val,X)
145	#define FP_PACK_RAW_DP(val,X) \
146	do { \
147	if (!FP_INHIBIT_RESULTS) \
148	_FP_PACK_RAW_1_P(D,val,X); \
149	} while (0)
150
151	#define FP_UNPACK_D(X,val) \
152	do { \
153	_FP_UNPACK_RAW_1(D,X,val); \
154	_FP_UNPACK_CANONICAL(D,1,X); \
155	} while (0)
156
157	#define FP_UNPACK_DP(X,val) \
158	do { \
159	_FP_UNPACK_RAW_1_P(D,X,val); \
160	_FP_UNPACK_CANONICAL(D,1,X); \
161	} while (0)
162
163	#define FP_PACK_D(val,X) \
164	do { \
165	_FP_PACK_CANONICAL(D,1,X); \
166	_FP_PACK_RAW_1(D,val,X); \
167	} while (0)
168
169	#define FP_PACK_DP(val,X) \
170	do { \
171	_FP_PACK_CANONICAL(D,1,X); \
172	if (!FP_INHIBIT_RESULTS) \
173	_FP_PACK_RAW_1_P(D,val,X); \
174	} while (0)
175
176	#define FP_ISSIGNAN_D(X) _FP_ISSIGNAN(D,1,X)
177	#define FP_NEG_D(R,X) _FP_NEG(D,1,R,X)
178	#define FP_ADD_D(R,X,Y) _FP_ADD(D,1,R,X,Y)
179	#define FP_SUB_D(R,X,Y) _FP_SUB(D,1,R,X,Y)
180	#define FP_MUL_D(R,X,Y) _FP_MUL(D,1,R,X,Y)
181	#define FP_DIV_D(R,X,Y) _FP_DIV(D,1,R,X,Y)
182	#define FP_SQRT_D(R,X) _FP_SQRT(D,1,R,X)
183	#define _FP_SQRT_MEAT_D(R,S,T,X,Q) _FP_SQRT_MEAT_1(R,S,T,X,Q)
184
185	/* The implementation of _FP_MUL_D and _FP_DIV_D should be chosen by
186	the target machine. */
187
188	#define FP_CMP_D(r,X,Y,un) _FP_CMP(D,1,r,X,Y,un)
189	#define FP_CMP_EQ_D(r,X,Y) _FP_CMP_EQ(D,1,r,X,Y)
190
191	#define FP_TO_INT_D(r,X,rsz,rsg) _FP_TO_INT(D,1,r,X,rsz,rsg)
192	#define FP_FROM_INT_D(X,r,rs,rt) _FP_FROM_INT(D,1,X,r,rs,rt)
193
194	#define _FP_FRAC_HIGH_D(X) _FP_FRAC_HIGH_1(X)
195	#define _FP_FRAC_HIGH_RAW_D(X) _FP_FRAC_HIGH_1(X)
196
197	#endif /* W_TYPE_SIZE < 64 */