[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

#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))

/* 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)

#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)
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
d876f532	39	#define _FP_FRACBITS_S 24
fe0b1e85	40	#define _FP_FRACXBITS_S (_FP_FRACTBITS_S - _FP_FRACBITS_S)
d876f532	41	#define _FP_WFRACBITS_S (_FP_WORKBITS + _FP_FRACBITS_S)
fe0b1e85	42	#define _FP_WFRACXBITS_S (_FP_FRACTBITS_S - _FP_WFRACBITS_S)
d876f532 UD	43	#define _FP_EXPBITS_S 8
	44	#define _FP_EXPBIAS_S 127
	45	#define _FP_EXPMAX_S 255
	46	#define _FP_QNANBIT_S ((_FP_W_TYPE)1 << (_FP_FRACBITS_S-2))
fe0b1e85	47	#define _FP_QNANBIT_SH_S ((_FP_W_TYPE)1 << (_FP_FRACBITS_S-2+_FP_WORKBITS))
d876f532	48	#define _FP_IMPLBIT_S ((_FP_W_TYPE)1 << (_FP_FRACBITS_S-1))
fe0b1e85	49	#define _FP_IMPLBIT_SH_S ((_FP_W_TYPE)1 << (_FP_FRACBITS_S-1+_FP_WORKBITS))
d876f532 UD	50	#define _FP_OVERFLOW_S ((_FP_W_TYPE)1 << (_FP_WFRACBITS_S))
	51
	52	/* The implementation of _FP_MUL_MEAT_S and _FP_DIV_MEAT_S should be
	53	chosen by the target machine. */
	54
fe0b1e85 RM	55	typedef float SFtype __attribute__((mode(SF)));
fe0b1e85 RM	56
d876f532 UD	57	union _FP_UNION_S
d876f532 UD	58	{
fe0b1e85	59	SFtype flt;
f775c276	60	struct _FP_STRUCT_LAYOUT {
d876f532 UD	61	#if __BYTE_ORDER == __BIG_ENDIAN
	62	unsigned sign : 1;
	63	unsigned exp : _FP_EXPBITS_S;
	64	unsigned frac : _FP_FRACBITS_S - (_FP_IMPLBIT_S != 0);
	65	#else
	66	unsigned frac : _FP_FRACBITS_S - (_FP_IMPLBIT_S != 0);
	67	unsigned exp : _FP_EXPBITS_S;
	68	unsigned sign : 1;
	69	#endif
	70	} bits __attribute__((packed));
	71	};
	72
	73	#define FP_DECL_S(X) _FP_DECL(1,X)
	74	#define FP_UNPACK_RAW_S(X,val) _FP_UNPACK_RAW_1(S,X,val)
	75	#define FP_UNPACK_RAW_SP(X,val) _FP_UNPACK_RAW_1_P(S,X,val)
	76	#define FP_PACK_RAW_S(val,X) _FP_PACK_RAW_1(S,val,X)
	77	#define FP_PACK_RAW_SP(val,X) \
	78	do { \
	79	if (!FP_INHIBIT_RESULTS) \
	80	_FP_PACK_RAW_1_P(S,val,X); \
	81	} while (0)
	82
	83	#define FP_UNPACK_S(X,val) \
	84	do { \
	85	_FP_UNPACK_RAW_1(S,X,val); \
	86	_FP_UNPACK_CANONICAL(S,1,X); \
	87	} while (0)
	88
	89	#define FP_UNPACK_SP(X,val) \
	90	do { \
	91	_FP_UNPACK_RAW_1_P(S,X,val); \
	92	_FP_UNPACK_CANONICAL(S,1,X); \
	93	} while (0)
	94
fe0b1e85 RM	95	#define FP_UNPACK_SEMIRAW_S(X,val) \
	96	do { \
	97	_FP_UNPACK_RAW_1(S,X,val); \
	98	_FP_UNPACK_SEMIRAW(S,1,X); \
	99	} while (0)
	100
	101	#define FP_UNPACK_SEMIRAW_SP(X,val) \
	102	do { \
	103	_FP_UNPACK_RAW_1_P(S,X,val); \
	104	_FP_UNPACK_SEMIRAW(S,1,X); \
	105	} while (0)
	106
d876f532 UD	107	#define FP_PACK_S(val,X) \
	108	do { \
	109	_FP_PACK_CANONICAL(S,1,X); \
	110	_FP_PACK_RAW_1(S,val,X); \
	111	} while (0)
	112
	113	#define FP_PACK_SP(val,X) \
	114	do { \
	115	_FP_PACK_CANONICAL(S,1,X); \
	116	if (!FP_INHIBIT_RESULTS) \
	117	_FP_PACK_RAW_1_P(S,val,X); \
	118	} while (0)
	119
fe0b1e85 RM	120	#define FP_PACK_SEMIRAW_S(val,X) \
	121	do { \
	122	_FP_PACK_SEMIRAW(S,1,X); \
	123	_FP_PACK_RAW_1(S,val,X); \
	124	} while (0)
	125
	126	#define FP_PACK_SEMIRAW_SP(val,X) \
	127	do { \
	128	_FP_PACK_SEMIRAW(S,1,X); \
	129	if (!FP_INHIBIT_RESULTS) \
	130	_FP_PACK_RAW_1_P(S,val,X); \
	131	} while (0)
	132
d876f532 UD	133	#define FP_ISSIGNAN_S(X) _FP_ISSIGNAN(S,1,X)
	134	#define FP_NEG_S(R,X) _FP_NEG(S,1,R,X)
	135	#define FP_ADD_S(R,X,Y) _FP_ADD(S,1,R,X,Y)
	136	#define FP_SUB_S(R,X,Y) _FP_SUB(S,1,R,X,Y)
	137	#define FP_MUL_S(R,X,Y) _FP_MUL(S,1,R,X,Y)
	138	#define FP_DIV_S(R,X,Y) _FP_DIV(S,1,R,X,Y)
	139	#define FP_SQRT_S(R,X) _FP_SQRT(S,1,R,X)
	140	#define _FP_SQRT_MEAT_S(R,S,T,X,Q) _FP_SQRT_MEAT_1(R,S,T,X,Q)
	141
	142	#define FP_CMP_S(r,X,Y,un) _FP_CMP(S,1,r,X,Y,un)
	143	#define FP_CMP_EQ_S(r,X,Y) _FP_CMP_EQ(S,1,r,X,Y)
e7b8c7bc	144	#define FP_CMP_UNORD_S(r,X,Y) _FP_CMP_UNORD(S,1,r,X,Y)
d876f532 UD	145
	146	#define FP_TO_INT_S(r,X,rsz,rsg) _FP_TO_INT(S,1,r,X,rsz,rsg)
	147	#define FP_FROM_INT_S(X,r,rs,rt) _FP_FROM_INT(S,1,X,r,rs,rt)
	148
	149	#define _FP_FRAC_HIGH_S(X) _FP_FRAC_HIGH_1(X)
	150	#define _FP_FRAC_HIGH_RAW_S(X) _FP_FRAC_HIGH_1(X)