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

/* Software floating-point emulation.
   Definitions for IEEE Single Precision.
   Copyright (C) 1997-2014 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 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.

   In addition to the permissions in the GNU Lesser General Public
   License, the Free Software Foundation gives you unlimited
   permission to link the compiled version of this file into
   combinations with other programs, and to distribute those
   combinations without any restriction coming from the use of this
   file.  (The Lesser General Public License restrictions do apply in
   other respects; for example, they cover modification of the file,
   and distribution when not linked into a combine executable.)

   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
   <http://www.gnu.org/licenses/>.  */

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

#define _FP_FRACTBITS_S		_FP_W_TYPE_SIZE

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

#define _FP_FRACBITS_S		24
#define _FP_FRACXBITS_S		(_FP_FRACTBITS_S - _FP_FRACBITS_S)
#define _FP_WFRACBITS_S		(_FP_WORKBITS + _FP_FRACBITS_S)
#define _FP_WFRACXBITS_S	(_FP_FRACTBITS_S - _FP_WFRACBITS_S)
#define _FP_EXPBITS_S		8
#define _FP_EXPBIAS_S		127
#define _FP_EXPMAX_S		255
#define _FP_QNANBIT_S		((_FP_W_TYPE) 1 << (_FP_FRACBITS_S-2))
#define _FP_QNANBIT_SH_S	((_FP_W_TYPE) 1 << (_FP_FRACBITS_S-2+_FP_WORKBITS))
#define _FP_IMPLBIT_S		((_FP_W_TYPE) 1 << (_FP_FRACBITS_S-1))
#define _FP_IMPLBIT_SH_S	((_FP_W_TYPE) 1 << (_FP_FRACBITS_S-1+_FP_WORKBITS))
#define _FP_OVERFLOW_S		((_FP_W_TYPE) 1 << (_FP_WFRACBITS_S))

#define _FP_WFRACBITS_DW_S	(2 * _FP_WFRACBITS_S)
#define _FP_WFRACXBITS_DW_S	(_FP_FRACTBITS_DW_S - _FP_WFRACBITS_DW_S)
#define _FP_HIGHBIT_DW_S	\
  ((_FP_W_TYPE) 1 << (_FP_WFRACBITS_DW_S - 1) % _FP_W_TYPE_SIZE)

/* The implementation of _FP_MUL_MEAT_S and _FP_DIV_MEAT_S should be
   chosen by the target machine.  */

typedef float SFtype __attribute__ ((mode (SF)));

union _FP_UNION_S
{
  SFtype flt;
  struct _FP_STRUCT_LAYOUT
  {
#if __BYTE_ORDER == __BIG_ENDIAN
    unsigned sign : 1;
    unsigned exp  : _FP_EXPBITS_S;
    unsigned frac : _FP_FRACBITS_S - (_FP_IMPLBIT_S != 0);
#else
    unsigned frac : _FP_FRACBITS_S - (_FP_IMPLBIT_S != 0);
    unsigned exp  : _FP_EXPBITS_S;
    unsigned sign : 1;
#endif
  } bits __attribute__ ((packed));
};

#define FP_DECL_S(X)		_FP_DECL (1, X)
#define FP_UNPACK_RAW_S(X, val)	_FP_UNPACK_RAW_1 (S, X, (val))
#define FP_UNPACK_RAW_SP(X, val)	_FP_UNPACK_RAW_1_P (S, X, (val))
#define FP_PACK_RAW_S(val, X)	_FP_PACK_RAW_1 (S, (val), X)
#define FP_PACK_RAW_SP(val, X)			\
  do						\
    {						\
      if (!FP_INHIBIT_RESULTS)			\
	_FP_PACK_RAW_1_P (S, (val), X);		\
    }						\
  while (0)

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

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

#define FP_UNPACK_SEMIRAW_S(X, val)		\
  do						\
    {						\
      _FP_UNPACK_RAW_1 (S, X, (val));		\
      _FP_UNPACK_SEMIRAW (S, 1, X);		\
    }						\
  while (0)

#define FP_UNPACK_SEMIRAW_SP(X, val)		\
  do						\
    {						\
      _FP_UNPACK_RAW_1_P (S, X, (val));		\
      _FP_UNPACK_SEMIRAW (S, 1, X);		\
    }						\
  while (0)

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

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

#define FP_PACK_SEMIRAW_S(val, X)		\
  do						\
    {						\
      _FP_PACK_SEMIRAW (S, 1, X);		\
      _FP_PACK_RAW_1 (S, (val), X);		\
    }						\
  while (0)

#define FP_PACK_SEMIRAW_SP(val, X)		\
  do						\
    {						\
      _FP_PACK_SEMIRAW (S, 1, X);		\
      if (!FP_INHIBIT_RESULTS)			\
	_FP_PACK_RAW_1_P (S, (val), X);		\
    }						\
  while (0)

#define FP_ISSIGNAN_S(X)		_FP_ISSIGNAN (S, 1, X)
#define FP_NEG_S(R, X)			_FP_NEG (S, 1, R, X)
#define FP_ADD_S(R, X, Y)		_FP_ADD (S, 1, R, X, Y)
#define FP_SUB_S(R, X, Y)		_FP_SUB (S, 1, R, X, Y)
#define FP_MUL_S(R, X, Y)		_FP_MUL (S, 1, R, X, Y)
#define FP_DIV_S(R, X, Y)		_FP_DIV (S, 1, R, X, Y)
#define FP_SQRT_S(R, X)			_FP_SQRT (S, 1, R, X)
#define _FP_SQRT_MEAT_S(R, S, T, X, Q)	_FP_SQRT_MEAT_1 (R, S, T, X, (Q))

#if _FP_W_TYPE_SIZE < 64
# define FP_FMA_S(R, X, Y, Z)	_FP_FMA (S, 1, 2, R, X, Y, Z)
#else
# define FP_FMA_S(R, X, Y, Z)	_FP_FMA (S, 1, 1, R, X, Y, Z)
#endif

#define FP_CMP_S(r, X, Y, un, ex)	_FP_CMP (S, 1, (r), X, Y, (un), (ex))
#define FP_CMP_EQ_S(r, X, Y, ex)	_FP_CMP_EQ (S, 1, (r), X, Y, (ex))
#define FP_CMP_UNORD_S(r, X, Y, ex)	_FP_CMP_UNORD (S, 1, (r), X, Y, (ex))

#define FP_TO_INT_S(r, X, rsz, rsg)	_FP_TO_INT (S, 1, (r), X, (rsz), (rsg))
#define FP_FROM_INT_S(X, r, rs, rt)	_FP_FROM_INT (S, 1, X, (r), (rs), rt)

#define _FP_FRAC_HIGH_S(X)	_FP_FRAC_HIGH_1 (X)
#define _FP_FRAC_HIGH_RAW_S(X)	_FP_FRAC_HIGH_1 (X)

#if _FP_W_TYPE_SIZE < 64
# define _FP_FRAC_HIGH_DW_S(X)	_FP_FRAC_HIGH_2 (X)
#else
# define _FP_FRAC_HIGH_DW_S(X)	_FP_FRAC_HIGH_1 (X)
#endif
Commit	Line	Data
d876f532 UD	1	/* Software floating-point emulation.
d876f532 UD	2	Definitions for IEEE Single Precision.
d4697bc9	3	Copyright (C) 1997-2014 Free Software Foundation, Inc.
d876f532 UD	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
41bdb6e2 AJ	11	modify it under the terms of the GNU Lesser General Public
	12	License as published by the Free Software Foundation; either
	13	version 2.1 of the License, or (at your option) any later version.
d876f532	14
638a783c RM	15	In addition to the permissions in the GNU Lesser General Public
	16	License, the Free Software Foundation gives you unlimited
	17	permission to link the compiled version of this file into
	18	combinations with other programs, and to distribute those
	19	combinations without any restriction coming from the use of this
	20	file. (The Lesser General Public License restrictions do apply in
	21	other respects; for example, they cover modification of the file,
	22	and distribution when not linked into a combine executable.)
	23
d876f532 UD	24	The GNU C Library is distributed in the hope that it will be useful,
	25	but WITHOUT ANY WARRANTY; without even the implied warranty of
	26	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
41bdb6e2	27	Lesser General Public License for more details.
d876f532	28
41bdb6e2	29	You should have received a copy of the GNU Lesser General Public
59ba27a6 PE	30	License along with the GNU C Library; if not, see
59ba27a6 PE	31	<http://www.gnu.org/licenses/>. */
d876f532 UD	32
d876f532 UD	33	#if _FP_W_TYPE_SIZE < 32
71b4dea7	34	# error "Here's a nickel kid. Go buy yourself a real computer."
d876f532 UD	35	#endif
d876f532 UD	36
fe0b1e85 RM	37	#define _FP_FRACTBITS_S _FP_W_TYPE_SIZE
fe0b1e85 RM	38
77f01ab5 JM	39	#if _FP_W_TYPE_SIZE < 64
	40	# define _FP_FRACTBITS_DW_S (2 * _FP_W_TYPE_SIZE)
	41	#else
	42	# define _FP_FRACTBITS_DW_S _FP_W_TYPE_SIZE
	43	#endif
	44
d876f532	45	#define _FP_FRACBITS_S 24
fe0b1e85	46	#define _FP_FRACXBITS_S (_FP_FRACTBITS_S - _FP_FRACBITS_S)
d876f532	47	#define _FP_WFRACBITS_S (_FP_WORKBITS + _FP_FRACBITS_S)
fe0b1e85	48	#define _FP_WFRACXBITS_S (_FP_FRACTBITS_S - _FP_WFRACBITS_S)
d876f532 UD	49	#define _FP_EXPBITS_S 8
	50	#define _FP_EXPBIAS_S 127
	51	#define _FP_EXPMAX_S 255
51ca9e29 JM	52	#define _FP_QNANBIT_S ((_FP_W_TYPE) 1 << (_FP_FRACBITS_S-2))
	53	#define _FP_QNANBIT_SH_S ((_FP_W_TYPE) 1 << (_FP_FRACBITS_S-2+_FP_WORKBITS))
	54	#define _FP_IMPLBIT_S ((_FP_W_TYPE) 1 << (_FP_FRACBITS_S-1))
	55	#define _FP_IMPLBIT_SH_S ((_FP_W_TYPE) 1 << (_FP_FRACBITS_S-1+_FP_WORKBITS))
	56	#define _FP_OVERFLOW_S ((_FP_W_TYPE) 1 << (_FP_WFRACBITS_S))
d876f532	57
77f01ab5 JM	58	#define _FP_WFRACBITS_DW_S (2 * _FP_WFRACBITS_S)
	59	#define _FP_WFRACXBITS_DW_S (_FP_FRACTBITS_DW_S - _FP_WFRACBITS_DW_S)
	60	#define _FP_HIGHBIT_DW_S \
51ca9e29	61	((_FP_W_TYPE) 1 << (_FP_WFRACBITS_DW_S - 1) % _FP_W_TYPE_SIZE)
77f01ab5	62
d876f532 UD	63	/* The implementation of _FP_MUL_MEAT_S and _FP_DIV_MEAT_S should be
	64	chosen by the target machine. */
	65
51ca9e29	66	typedef float SFtype __attribute__ ((mode (SF)));
fe0b1e85	67
d876f532 UD	68	union _FP_UNION_S
d876f532 UD	69	{
fe0b1e85	70	SFtype flt;
1e145589 JM	71	struct _FP_STRUCT_LAYOUT
1e145589 JM	72	{
d876f532 UD	73	#if __BYTE_ORDER == __BIG_ENDIAN
	74	unsigned sign : 1;
	75	unsigned exp : _FP_EXPBITS_S;
	76	unsigned frac : _FP_FRACBITS_S - (_FP_IMPLBIT_S != 0);
	77	#else
	78	unsigned frac : _FP_FRACBITS_S - (_FP_IMPLBIT_S != 0);
	79	unsigned exp : _FP_EXPBITS_S;
	80	unsigned sign : 1;
	81	#endif
51ca9e29	82	} bits __attribute__ ((packed));
d876f532 UD	83	};
d876f532 UD	84
51ca9e29	85	#define FP_DECL_S(X) _FP_DECL (1, X)
5c0508a3 JM	86	#define FP_UNPACK_RAW_S(X, val) _FP_UNPACK_RAW_1 (S, X, (val))
	87	#define FP_UNPACK_RAW_SP(X, val) _FP_UNPACK_RAW_1_P (S, X, (val))
	88	#define FP_PACK_RAW_S(val, X) _FP_PACK_RAW_1 (S, (val), X)
51ca9e29	89	#define FP_PACK_RAW_SP(val, X) \
1e145589 JM	90	do \
	91	{ \
	92	if (!FP_INHIBIT_RESULTS) \
5c0508a3	93	_FP_PACK_RAW_1_P (S, (val), X); \
1e145589 JM	94	} \
	95	while (0)
	96
51ca9e29	97	#define FP_UNPACK_S(X, val) \
1e145589 JM	98	do \
1e145589 JM	99	{ \
5c0508a3	100	_FP_UNPACK_RAW_1 (S, X, (val)); \
51ca9e29	101	_FP_UNPACK_CANONICAL (S, 1, X); \
1e145589 JM	102	} \
	103	while (0)
	104
51ca9e29	105	#define FP_UNPACK_SP(X, val) \
1e145589 JM	106	do \
1e145589 JM	107	{ \
5c0508a3	108	_FP_UNPACK_RAW_1_P (S, X, (val)); \
51ca9e29	109	_FP_UNPACK_CANONICAL (S, 1, X); \
1e145589 JM	110	} \
	111	while (0)
	112
51ca9e29	113	#define FP_UNPACK_SEMIRAW_S(X, val) \
1e145589 JM	114	do \
1e145589 JM	115	{ \
5c0508a3	116	_FP_UNPACK_RAW_1 (S, X, (val)); \
51ca9e29	117	_FP_UNPACK_SEMIRAW (S, 1, X); \
1e145589 JM	118	} \
	119	while (0)
	120
51ca9e29	121	#define FP_UNPACK_SEMIRAW_SP(X, val) \
1e145589 JM	122	do \
1e145589 JM	123	{ \
5c0508a3	124	_FP_UNPACK_RAW_1_P (S, X, (val)); \
51ca9e29	125	_FP_UNPACK_SEMIRAW (S, 1, X); \
1e145589 JM	126	} \
	127	while (0)
	128
51ca9e29	129	#define FP_PACK_S(val, X) \
1e145589 JM	130	do \
1e145589 JM	131	{ \
51ca9e29	132	_FP_PACK_CANONICAL (S, 1, X); \
5c0508a3	133	_FP_PACK_RAW_1 (S, (val), X); \
1e145589 JM	134	} \
	135	while (0)
	136
51ca9e29	137	#define FP_PACK_SP(val, X) \
1e145589 JM	138	do \
1e145589 JM	139	{ \
51ca9e29	140	_FP_PACK_CANONICAL (S, 1, X); \
1e145589	141	if (!FP_INHIBIT_RESULTS) \
5c0508a3	142	_FP_PACK_RAW_1_P (S, (val), X); \
1e145589 JM	143	} \
	144	while (0)
	145
51ca9e29	146	#define FP_PACK_SEMIRAW_S(val, X) \
1e145589 JM	147	do \
1e145589 JM	148	{ \
51ca9e29	149	_FP_PACK_SEMIRAW (S, 1, X); \
5c0508a3	150	_FP_PACK_RAW_1 (S, (val), X); \
1e145589 JM	151	} \
	152	while (0)
	153
51ca9e29	154	#define FP_PACK_SEMIRAW_SP(val, X) \
1e145589 JM	155	do \
1e145589 JM	156	{ \
51ca9e29	157	_FP_PACK_SEMIRAW (S, 1, X); \
1e145589	158	if (!FP_INHIBIT_RESULTS) \
5c0508a3	159	_FP_PACK_RAW_1_P (S, (val), X); \
1e145589 JM	160	} \
1e145589 JM	161	while (0)
fe0b1e85	162
51ca9e29 JM	163	#define FP_ISSIGNAN_S(X) _FP_ISSIGNAN (S, 1, X)
	164	#define FP_NEG_S(R, X) _FP_NEG (S, 1, R, X)
	165	#define FP_ADD_S(R, X, Y) _FP_ADD (S, 1, R, X, Y)
	166	#define FP_SUB_S(R, X, Y) _FP_SUB (S, 1, R, X, Y)
	167	#define FP_MUL_S(R, X, Y) _FP_MUL (S, 1, R, X, Y)
	168	#define FP_DIV_S(R, X, Y) _FP_DIV (S, 1, R, X, Y)
	169	#define FP_SQRT_S(R, X) _FP_SQRT (S, 1, R, X)
5c0508a3	170	#define _FP_SQRT_MEAT_S(R, S, T, X, Q) _FP_SQRT_MEAT_1 (R, S, T, X, (Q))
d876f532	171
77f01ab5	172	#if _FP_W_TYPE_SIZE < 64
51ca9e29	173	# define FP_FMA_S(R, X, Y, Z) _FP_FMA (S, 1, 2, R, X, Y, Z)
77f01ab5	174	#else
51ca9e29	175	# define FP_FMA_S(R, X, Y, Z) _FP_FMA (S, 1, 1, R, X, Y, Z)
77f01ab5 JM	176	#endif
77f01ab5 JM	177
5c0508a3 JM	178	#define FP_CMP_S(r, X, Y, un, ex) _FP_CMP (S, 1, (r), X, Y, (un), (ex))
	179	#define FP_CMP_EQ_S(r, X, Y, ex) _FP_CMP_EQ (S, 1, (r), X, Y, (ex))
	180	#define FP_CMP_UNORD_S(r, X, Y, ex) _FP_CMP_UNORD (S, 1, (r), X, Y, (ex))
d876f532	181
5c0508a3 JM	182	#define FP_TO_INT_S(r, X, rsz, rsg) _FP_TO_INT (S, 1, (r), X, (rsz), (rsg))
5c0508a3 JM	183	#define FP_FROM_INT_S(X, r, rs, rt) _FP_FROM_INT (S, 1, X, (r), (rs), rt)
d876f532	184
51ca9e29 JM	185	#define _FP_FRAC_HIGH_S(X) _FP_FRAC_HIGH_1 (X)
51ca9e29 JM	186	#define _FP_FRAC_HIGH_RAW_S(X) _FP_FRAC_HIGH_1 (X)
77f01ab5 JM	187
77f01ab5 JM	188	#if _FP_W_TYPE_SIZE < 64
51ca9e29	189	# define _FP_FRAC_HIGH_DW_S(X) _FP_FRAC_HIGH_2 (X)
77f01ab5	190	#else
51ca9e29	191	# define _FP_FRAC_HIGH_DW_S(X) _FP_FRAC_HIGH_1 (X)
77f01ab5	192	#endif