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

/* Software floating-point emulation.
   Definitions for IEEE Single Precision.
   Copyright (C) 1997-2013 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)	_FP_CMP(S,1,r,X,Y,un)
#define FP_CMP_EQ_S(r,X,Y)	_FP_CMP_EQ(S,1,r,X,Y)
#define FP_CMP_UNORD_S(r,X,Y)	_FP_CMP_UNORD(S,1,r,X,Y)

#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.
568035b7	3	Copyright (C) 1997-2013 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
	33	#if _FP_W_TYPE_SIZE < 32
	34	#error "Here's a nickel kid. Go buy yourself a real computer."
	35	#endif
	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
	52	#define _FP_QNANBIT_S ((_FP_W_TYPE)1 << (_FP_FRACBITS_S-2))
fe0b1e85	53	#define _FP_QNANBIT_SH_S ((_FP_W_TYPE)1 << (_FP_FRACBITS_S-2+_FP_WORKBITS))
d876f532	54	#define _FP_IMPLBIT_S ((_FP_W_TYPE)1 << (_FP_FRACBITS_S-1))
fe0b1e85	55	#define _FP_IMPLBIT_SH_S ((_FP_W_TYPE)1 << (_FP_FRACBITS_S-1+_FP_WORKBITS))
d876f532 UD	56	#define _FP_OVERFLOW_S ((_FP_W_TYPE)1 << (_FP_WFRACBITS_S))
d876f532 UD	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 \
	61	((_FP_W_TYPE)1 << (_FP_WFRACBITS_DW_S - 1) % _FP_W_TYPE_SIZE)
	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
fe0b1e85 RM	66	typedef float SFtype __attribute__((mode(SF)));
fe0b1e85 RM	67
d876f532 UD	68	union _FP_UNION_S
d876f532 UD	69	{
fe0b1e85	70	SFtype flt;
f775c276	71	struct _FP_STRUCT_LAYOUT {
d876f532 UD	72	#if __BYTE_ORDER == __BIG_ENDIAN
	73	unsigned sign : 1;
	74	unsigned exp : _FP_EXPBITS_S;
	75	unsigned frac : _FP_FRACBITS_S - (_FP_IMPLBIT_S != 0);
	76	#else
	77	unsigned frac : _FP_FRACBITS_S - (_FP_IMPLBIT_S != 0);
	78	unsigned exp : _FP_EXPBITS_S;
	79	unsigned sign : 1;
	80	#endif
	81	} bits __attribute__((packed));
	82	};
	83
	84	#define FP_DECL_S(X) _FP_DECL(1,X)
	85	#define FP_UNPACK_RAW_S(X,val) _FP_UNPACK_RAW_1(S,X,val)
	86	#define FP_UNPACK_RAW_SP(X,val) _FP_UNPACK_RAW_1_P(S,X,val)
	87	#define FP_PACK_RAW_S(val,X) _FP_PACK_RAW_1(S,val,X)
	88	#define FP_PACK_RAW_SP(val,X) \
	89	do { \
	90	if (!FP_INHIBIT_RESULTS) \
	91	_FP_PACK_RAW_1_P(S,val,X); \
	92	} while (0)
	93
	94	#define FP_UNPACK_S(X,val) \
	95	do { \
	96	_FP_UNPACK_RAW_1(S,X,val); \
	97	_FP_UNPACK_CANONICAL(S,1,X); \
	98	} while (0)
	99
	100	#define FP_UNPACK_SP(X,val) \
	101	do { \
	102	_FP_UNPACK_RAW_1_P(S,X,val); \
	103	_FP_UNPACK_CANONICAL(S,1,X); \
	104	} while (0)
	105
fe0b1e85 RM	106	#define FP_UNPACK_SEMIRAW_S(X,val) \
	107	do { \
	108	_FP_UNPACK_RAW_1(S,X,val); \
	109	_FP_UNPACK_SEMIRAW(S,1,X); \
	110	} while (0)
	111
	112	#define FP_UNPACK_SEMIRAW_SP(X,val) \
	113	do { \
	114	_FP_UNPACK_RAW_1_P(S,X,val); \
	115	_FP_UNPACK_SEMIRAW(S,1,X); \
	116	} while (0)
	117
d876f532 UD	118	#define FP_PACK_S(val,X) \
	119	do { \
	120	_FP_PACK_CANONICAL(S,1,X); \
	121	_FP_PACK_RAW_1(S,val,X); \
	122	} while (0)
	123
	124	#define FP_PACK_SP(val,X) \
	125	do { \
	126	_FP_PACK_CANONICAL(S,1,X); \
	127	if (!FP_INHIBIT_RESULTS) \
	128	_FP_PACK_RAW_1_P(S,val,X); \
	129	} while (0)
	130
fe0b1e85 RM	131	#define FP_PACK_SEMIRAW_S(val,X) \
	132	do { \
	133	_FP_PACK_SEMIRAW(S,1,X); \
	134	_FP_PACK_RAW_1(S,val,X); \
	135	} while (0)
	136
	137	#define FP_PACK_SEMIRAW_SP(val,X) \
	138	do { \
	139	_FP_PACK_SEMIRAW(S,1,X); \
	140	if (!FP_INHIBIT_RESULTS) \
	141	_FP_PACK_RAW_1_P(S,val,X); \
	142	} while (0)
	143
d876f532 UD	144	#define FP_ISSIGNAN_S(X) _FP_ISSIGNAN(S,1,X)
	145	#define FP_NEG_S(R,X) _FP_NEG(S,1,R,X)
	146	#define FP_ADD_S(R,X,Y) _FP_ADD(S,1,R,X,Y)
	147	#define FP_SUB_S(R,X,Y) _FP_SUB(S,1,R,X,Y)
	148	#define FP_MUL_S(R,X,Y) _FP_MUL(S,1,R,X,Y)
	149	#define FP_DIV_S(R,X,Y) _FP_DIV(S,1,R,X,Y)
	150	#define FP_SQRT_S(R,X) _FP_SQRT(S,1,R,X)
	151	#define _FP_SQRT_MEAT_S(R,S,T,X,Q) _FP_SQRT_MEAT_1(R,S,T,X,Q)
	152
77f01ab5 JM	153	#if _FP_W_TYPE_SIZE < 64
	154	# define FP_FMA_S(R, X, Y, Z) _FP_FMA(S, 1, 2, R, X, Y, Z)
	155	#else
	156	# define FP_FMA_S(R, X, Y, Z) _FP_FMA(S, 1, 1, R, X, Y, Z)
	157	#endif
	158
d876f532 UD	159	#define FP_CMP_S(r,X,Y,un) _FP_CMP(S,1,r,X,Y,un)
d876f532 UD	160	#define FP_CMP_EQ_S(r,X,Y) _FP_CMP_EQ(S,1,r,X,Y)
e7b8c7bc	161	#define FP_CMP_UNORD_S(r,X,Y) _FP_CMP_UNORD(S,1,r,X,Y)
d876f532 UD	162
	163	#define FP_TO_INT_S(r,X,rsz,rsg) _FP_TO_INT(S,1,r,X,rsz,rsg)
	164	#define FP_FROM_INT_S(X,r,rs,rt) _FP_FROM_INT(S,1,X,r,rs,rt)
	165
	166	#define _FP_FRAC_HIGH_S(X) _FP_FRAC_HIGH_1(X)
	167	#define _FP_FRAC_HIGH_RAW_S(X) _FP_FRAC_HIGH_1(X)
77f01ab5 JM	168
	169	#if _FP_W_TYPE_SIZE < 64
	170	# define _FP_FRAC_HIGH_DW_S(X) _FP_FRAC_HIGH_2(X)
	171	#else
	172	# define _FP_FRAC_HIGH_DW_S(X) _FP_FRAC_HIGH_1(X)
	173	#endif