WebSVN – Kolibri OS – Diff – /contrib/toolchain/binutils/include/floatformat.h


/* IEEE floating point support declarations, for GDB, the GNU Debugger.
 
   Copyright (C) 1991-2015 Free Software Foundation, Inc.
 
This file is part of GDB.
 
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
 
This program 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 General Public License for more details.
 
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
 
#if !defined (FLOATFORMAT_H)
#define FLOATFORMAT_H 1
 
#include "ansidecl.h"
 
#ifdef __cplusplus
extern "C" {
#endif
 
/* A floatformat consists of a sign bit, an exponent and a mantissa.  Once the
   bytes are concatenated according to the byteorder flag, then each of those
   fields is contiguous.  We number the bits with 0 being the most significant
   (i.e. BITS_BIG_ENDIAN type numbering), and specify which bits each field
   contains with the *_start and *_len fields.  */
 
/* What is the order of the bytes?  */
 
enum floatformat_byteorders {
  /* Standard little endian byte order.
     EX: 1.2345678e10 => 00 00 80 c5 e0 fe 06 42 */
  floatformat_little,
 
  /* Standard big endian byte order.
     EX: 1.2345678e10 => 42 06 fe e0 c5 80 00 00 */
  floatformat_big,
 
  /* Little endian byte order but big endian word order.
     EX: 1.2345678e10 => e0 fe 06 42 00 00 80 c5 */
  floatformat_littlebyte_bigword,
 
  /* VAX byte order.  Little endian byte order with 16-bit words.  The
     following example is an illustration of the byte order only; VAX
     doesn't have a fully IEEE compliant floating-point format.
     EX: 1.2345678e10 => 80 c5 00 00 06 42 e0 fe */
  floatformat_vax
};
 
enum floatformat_intbit { floatformat_intbit_yes, floatformat_intbit_no };
 
struct floatformat
{
  enum floatformat_byteorders byteorder;
  unsigned int totalsize;	/* Total size of number in bits */
 
  /* Sign bit is always one bit long.  1 means negative, 0 means positive.  */
  unsigned int sign_start;
 
  unsigned int exp_start;
  unsigned int exp_len;
  /* Bias added to a "true" exponent to form the biased exponent.  It
     is intentionally signed as, otherwize, -exp_bias can turn into a
     very large number (e.g., given the exp_bias of 0x3fff and a 64
     bit long, the equation (long)(1 - exp_bias) evaluates to
     4294950914) instead of -16382).  */
  int exp_bias;
  /* Exponent value which indicates NaN.  This is the actual value stored in
     the float, not adjusted by the exp_bias.  This usually consists of all
     one bits.  */
  unsigned int exp_nan;
 
  unsigned int man_start;
  unsigned int man_len;
 
  /* Is the integer bit explicit or implicit?  */
  enum floatformat_intbit intbit;
 
  /* Internal name for debugging. */
  const char *name;
 
  /* Validator method.  */
  int (*is_valid) (const struct floatformat *fmt, const void *from);
 
  /* Is the format actually the sum of two smaller floating point
     formats (IBM long double, as described in
     gcc/config/rs6000/darwin-ldouble-format)?  If so, this is the
     smaller format in question, and the fields sign_start through
     intbit describe the first half.  If not, this is NULL.  */
  const struct floatformat *split_half;
};
 
/* floatformats for IEEE single and double, big and little endian.  */
 
extern const struct floatformat floatformat_ieee_half_big;
extern const struct floatformat floatformat_ieee_half_little;
extern const struct floatformat floatformat_ieee_single_big;
extern const struct floatformat floatformat_ieee_single_little;
extern const struct floatformat floatformat_ieee_double_big;
extern const struct floatformat floatformat_ieee_double_little;
 
/* floatformat for ARM IEEE double, little endian bytes and big endian words */
 
extern const struct floatformat floatformat_ieee_double_littlebyte_bigword;
 
/* floatformats for VAX.  */
 
extern const struct floatformat floatformat_vax_f;
extern const struct floatformat floatformat_vax_d;
extern const struct floatformat floatformat_vax_g;
 
/* floatformats for various extendeds.  */
 
extern const struct floatformat floatformat_i387_ext;
extern const struct floatformat floatformat_m68881_ext;
extern const struct floatformat floatformat_i960_ext;
extern const struct floatformat floatformat_m88110_ext;
extern const struct floatformat floatformat_m88110_harris_ext;
extern const struct floatformat floatformat_arm_ext_big;
extern const struct floatformat floatformat_arm_ext_littlebyte_bigword;
/* IA-64 Floating Point register spilt into memory.  */
extern const struct floatformat floatformat_ia64_spill_big;
extern const struct floatformat floatformat_ia64_spill_little;
extern const struct floatformat floatformat_ia64_quad_big;
extern const struct floatformat floatformat_ia64_quad_little;
/* IBM long double (double+double).  */
extern const struct floatformat floatformat_ibm_long_double_big;
extern const struct floatformat floatformat_ibm_long_double_little;
 
/* Convert from FMT to a double.
   FROM is the address of the extended float.
   Store the double in *TO.  */
 
extern void
floatformat_to_double (const struct floatformat *, const void *, double *);
 
/* The converse: convert the double *FROM to FMT
   and store where TO points.  */
 
extern void
floatformat_from_double (const struct floatformat *, const double *, void *);
 
/* Return non-zero iff the data at FROM is a valid number in format FMT.  */
 
extern int
floatformat_is_valid (const struct floatformat *fmt, const void *from);
 
#ifdef __cplusplus
}
#endif
 
#endif	/* defined (FLOATFORMAT_H) */

Subversion Repositories Kolibri OS

(root)/contrib/toolchain/binutils/include/floatformat.h – Rev 5191 → 6324

Rev 5191		Rev 6324
1	/* IEEE floating point support declarations, for GDB, the GNU Debugger.	1	/* IEEE floating point support declarations, for GDB, the GNU Debugger.
2	Copyright 1991, 1994, 1995, 1997, 2000, 2003, 2005, 2010	-
3	Free Software Foundation, Inc.	2	Copyright (C) 1991-2015 Free Software Foundation, Inc.
4		3
5	This file is part of GDB.	4	This file is part of GDB.
6		5
7	This program is free software; you can redistribute it and/or modify	6	This program is free software; you can redistribute it and/or modify
8	it under the terms of the GNU General Public License as published by	7	it under the terms of the GNU General Public License as published by
9	the Free Software Foundation; either version 2 of the License, or	8	the Free Software Foundation; either version 2 of the License, or
10	(at your option) any later version.	9	(at your option) any later version.
11		10
12	This program is distributed in the hope that it will be useful,	11	This program is distributed in the hope that it will be useful,
13	but WITHOUT ANY WARRANTY; without even the implied warranty of	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15	GNU General Public License for more details.	14	GNU General Public License for more details.
16		15
17	You should have received a copy of the GNU General Public License	16	You should have received a copy of the GNU General Public License
18	along with this program; if not, write to the Free Software	17	along with this program; if not, write to the Free Software
19	Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */	18	Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
20		19
21	#if !defined (FLOATFORMAT_H)	20	#if !defined (FLOATFORMAT_H)
22	#define FLOATFORMAT_H 1	21	#define FLOATFORMAT_H 1
23		22
24	#include "ansidecl.h"	23	#include "ansidecl.h"
-		24
-		25	#ifdef __cplusplus
-		26	extern "C" {
-		27	#endif
25		28
26	/* A floatformat consists of a sign bit, an exponent and a mantissa. Once the	29	/* A floatformat consists of a sign bit, an exponent and a mantissa. Once the
27	bytes are concatenated according to the byteorder flag, then each of those	30	bytes are concatenated according to the byteorder flag, then each of those
28	fields is contiguous. We number the bits with 0 being the most significant	31	fields is contiguous. We number the bits with 0 being the most significant
29	(i.e. BITS_BIG_ENDIAN type numbering), and specify which bits each field	32	(i.e. BITS_BIG_ENDIAN type numbering), and specify which bits each field
30	contains with the _start and _len fields. */	33	contains with the _start and _len fields. */
31		34
32	/* What is the order of the bytes? */	35	/* What is the order of the bytes? */
33		36
34	enum floatformat_byteorders {	37	enum floatformat_byteorders {
35	/* Standard little endian byte order.	38	/* Standard little endian byte order.
36	EX: 1.2345678e10 => 00 00 80 c5 e0 fe 06 42 */	39	EX: 1.2345678e10 => 00 00 80 c5 e0 fe 06 42 */
37	floatformat_little,	40	floatformat_little,
38		41
39	/* Standard big endian byte order.	42	/* Standard big endian byte order.
40	EX: 1.2345678e10 => 42 06 fe e0 c5 80 00 00 */	43	EX: 1.2345678e10 => 42 06 fe e0 c5 80 00 00 */
41	floatformat_big,	44	floatformat_big,
42		45
43	/* Little endian byte order but big endian word order.	46	/* Little endian byte order but big endian word order.
44	EX: 1.2345678e10 => e0 fe 06 42 00 00 80 c5 */	47	EX: 1.2345678e10 => e0 fe 06 42 00 00 80 c5 */
45	floatformat_littlebyte_bigword,	48	floatformat_littlebyte_bigword,
46		49
47	/* VAX byte order. Little endian byte order with 16-bit words. The	50	/* VAX byte order. Little endian byte order with 16-bit words. The
48	following example is an illustration of the byte order only; VAX	51	following example is an illustration of the byte order only; VAX
49	doesn't have a fully IEEE compliant floating-point format.	52	doesn't have a fully IEEE compliant floating-point format.
50	EX: 1.2345678e10 => 80 c5 00 00 06 42 e0 fe */	53	EX: 1.2345678e10 => 80 c5 00 00 06 42 e0 fe */
51	floatformat_vax	54	floatformat_vax
52	};	55	};
53		56
54	enum floatformat_intbit { floatformat_intbit_yes, floatformat_intbit_no };	57	enum floatformat_intbit { floatformat_intbit_yes, floatformat_intbit_no };
55		58
56	struct floatformat	59	struct floatformat
57	{	60	{
58	enum floatformat_byteorders byteorder;	61	enum floatformat_byteorders byteorder;
59	unsigned int totalsize; /* Total size of number in bits */	62	unsigned int totalsize; /* Total size of number in bits */
60		63
61	/* Sign bit is always one bit long. 1 means negative, 0 means positive. */	64	/* Sign bit is always one bit long. 1 means negative, 0 means positive. */
62	unsigned int sign_start;	65	unsigned int sign_start;
63		66
64	unsigned int exp_start;	67	unsigned int exp_start;
65	unsigned int exp_len;	68	unsigned int exp_len;
66	/* Bias added to a "true" exponent to form the biased exponent. It	69	/* Bias added to a "true" exponent to form the biased exponent. It
67	is intentionally signed as, otherwize, -exp_bias can turn into a	70	is intentionally signed as, otherwize, -exp_bias can turn into a
68	very large number (e.g., given the exp_bias of 0x3fff and a 64	71	very large number (e.g., given the exp_bias of 0x3fff and a 64
69	bit long, the equation (long)(1 - exp_bias) evaluates to	72	bit long, the equation (long)(1 - exp_bias) evaluates to
70	4294950914) instead of -16382). */	73	4294950914) instead of -16382). */
71	int exp_bias;	74	int exp_bias;
72	/* Exponent value which indicates NaN. This is the actual value stored in	75	/* Exponent value which indicates NaN. This is the actual value stored in
73	the float, not adjusted by the exp_bias. This usually consists of all	76	the float, not adjusted by the exp_bias. This usually consists of all
74	one bits. */	77	one bits. */
75	unsigned int exp_nan;	78	unsigned int exp_nan;
76		79
77	unsigned int man_start;	80	unsigned int man_start;
78	unsigned int man_len;	81	unsigned int man_len;
79		82
80	/* Is the integer bit explicit or implicit? */	83	/* Is the integer bit explicit or implicit? */
81	enum floatformat_intbit intbit;	84	enum floatformat_intbit intbit;
82		85
83	/* Internal name for debugging. */	86	/* Internal name for debugging. */
84	const char *name;	87	const char *name;
85		88
86	/* Validator method. */	89	/* Validator method. */
87	int (is_valid) (const struct floatformat fmt, const void *from);	90	int (is_valid) (const struct floatformat fmt, const void *from);
88		91
89	/* Is the format actually the sum of two smaller floating point	92	/* Is the format actually the sum of two smaller floating point
90	formats (IBM long double, as described in	93	formats (IBM long double, as described in
91	gcc/config/rs6000/darwin-ldouble-format)? If so, this is the	94	gcc/config/rs6000/darwin-ldouble-format)? If so, this is the
92	smaller format in question, and the fields sign_start through	95	smaller format in question, and the fields sign_start through
93	intbit describe the first half. If not, this is NULL. */	96	intbit describe the first half. If not, this is NULL. */
94	const struct floatformat *split_half;	97	const struct floatformat *split_half;
95	};	98	};
96		99
97	/* floatformats for IEEE single and double, big and little endian. */	100	/* floatformats for IEEE single and double, big and little endian. */
98		101
99	extern const struct floatformat floatformat_ieee_half_big;	102	extern const struct floatformat floatformat_ieee_half_big;
100	extern const struct floatformat floatformat_ieee_half_little;	103	extern const struct floatformat floatformat_ieee_half_little;
101	extern const struct floatformat floatformat_ieee_single_big;	104	extern const struct floatformat floatformat_ieee_single_big;
102	extern const struct floatformat floatformat_ieee_single_little;	105	extern const struct floatformat floatformat_ieee_single_little;
103	extern const struct floatformat floatformat_ieee_double_big;	106	extern const struct floatformat floatformat_ieee_double_big;
104	extern const struct floatformat floatformat_ieee_double_little;	107	extern const struct floatformat floatformat_ieee_double_little;
105		108
106	/* floatformat for ARM IEEE double, little endian bytes and big endian words */	109	/* floatformat for ARM IEEE double, little endian bytes and big endian words */
107		110
108	extern const struct floatformat floatformat_ieee_double_littlebyte_bigword;	111	extern const struct floatformat floatformat_ieee_double_littlebyte_bigword;
109		112
110	/* floatformats for VAX. */	113	/* floatformats for VAX. */
111		114
112	extern const struct floatformat floatformat_vax_f;	115	extern const struct floatformat floatformat_vax_f;
113	extern const struct floatformat floatformat_vax_d;	116	extern const struct floatformat floatformat_vax_d;
114	extern const struct floatformat floatformat_vax_g;	117	extern const struct floatformat floatformat_vax_g;
115		118
116	/* floatformats for various extendeds. */	119	/* floatformats for various extendeds. */
117		120
118	extern const struct floatformat floatformat_i387_ext;	121	extern const struct floatformat floatformat_i387_ext;
119	extern const struct floatformat floatformat_m68881_ext;	122	extern const struct floatformat floatformat_m68881_ext;
120	extern const struct floatformat floatformat_i960_ext;	123	extern const struct floatformat floatformat_i960_ext;
121	extern const struct floatformat floatformat_m88110_ext;	124	extern const struct floatformat floatformat_m88110_ext;
122	extern const struct floatformat floatformat_m88110_harris_ext;	125	extern const struct floatformat floatformat_m88110_harris_ext;
123	extern const struct floatformat floatformat_arm_ext_big;	126	extern const struct floatformat floatformat_arm_ext_big;
124	extern const struct floatformat floatformat_arm_ext_littlebyte_bigword;	127	extern const struct floatformat floatformat_arm_ext_littlebyte_bigword;
125	/* IA-64 Floating Point register spilt into memory. */	128	/* IA-64 Floating Point register spilt into memory. */
126	extern const struct floatformat floatformat_ia64_spill_big;	129	extern const struct floatformat floatformat_ia64_spill_big;
127	extern const struct floatformat floatformat_ia64_spill_little;	130	extern const struct floatformat floatformat_ia64_spill_little;
128	extern const struct floatformat floatformat_ia64_quad_big;	131	extern const struct floatformat floatformat_ia64_quad_big;
129	extern const struct floatformat floatformat_ia64_quad_little;	132	extern const struct floatformat floatformat_ia64_quad_little;
130	/* IBM long double (double+double). */	133	/* IBM long double (double+double). */
131	extern const struct floatformat floatformat_ibm_long_double_big;	134	extern const struct floatformat floatformat_ibm_long_double_big;
132	extern const struct floatformat floatformat_ibm_long_double_little;	135	extern const struct floatformat floatformat_ibm_long_double_little;
133		136
134	/* Convert from FMT to a double.	137	/* Convert from FMT to a double.
135	FROM is the address of the extended float.	138	FROM is the address of the extended float.
136	Store the double in TO. /	139	Store the double in TO. /
137		140
138	extern void	141	extern void
139	floatformat_to_double (const struct floatformat , const void , double *);	142	floatformat_to_double (const struct floatformat , const void , double *);
140		143
141	/* The converse: convert the double *FROM to FMT	144	/* The converse: convert the double *FROM to FMT
142	and store where TO points. */	145	and store where TO points. */
143		146
144	extern void	147	extern void
145	floatformat_from_double (const struct floatformat , const double , void *);	148	floatformat_from_double (const struct floatformat , const double , void *);
146		149
147	/* Return non-zero iff the data at FROM is a valid number in format FMT. */	150	/* Return non-zero iff the data at FROM is a valid number in format FMT. */
148		151
149	extern int	152	extern int
150	floatformat_is_valid (const struct floatformat fmt, const void from);	153	floatformat_is_valid (const struct floatformat fmt, const void from);
-		154
-		155	#ifdef __cplusplus
-		156	}
-		157	#endif
151		158
152	#endif /* defined (FLOATFORMAT_H) */	159	#endif /* defined (FLOATFORMAT_H) */