Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
quad.h
Go to the documentation of this file.
1 /* Software floating-point emulation.
2  Definitions for IEEE Quad 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 ([email protected]),
6  Jakub Jelinek ([email protected]),
7  David S. Miller ([email protected]) and
8  Peter Maydell ([email protected]).
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 #ifndef __MATH_EMU_QUAD_H__
26 #define __MATH_EMU_QUAD_H__
27 
28 #if _FP_W_TYPE_SIZE < 32
29 #error "Here's a nickel, kid. Go buy yourself a real computer."
30 #endif
31 
32 #if _FP_W_TYPE_SIZE < 64
33 #define _FP_FRACTBITS_Q (4*_FP_W_TYPE_SIZE)
34 #else
35 #define _FP_FRACTBITS_Q (2*_FP_W_TYPE_SIZE)
36 #endif
37 
38 #define _FP_FRACBITS_Q 113
39 #define _FP_FRACXBITS_Q (_FP_FRACTBITS_Q - _FP_FRACBITS_Q)
40 #define _FP_WFRACBITS_Q (_FP_WORKBITS + _FP_FRACBITS_Q)
41 #define _FP_WFRACXBITS_Q (_FP_FRACTBITS_Q - _FP_WFRACBITS_Q)
42 #define _FP_EXPBITS_Q 15
43 #define _FP_EXPBIAS_Q 16383
44 #define _FP_EXPMAX_Q 32767
45 
46 #define _FP_QNANBIT_Q \
47  ((_FP_W_TYPE)1 << (_FP_FRACBITS_Q-2) % _FP_W_TYPE_SIZE)
48 #define _FP_IMPLBIT_Q \
49  ((_FP_W_TYPE)1 << (_FP_FRACBITS_Q-1) % _FP_W_TYPE_SIZE)
50 #define _FP_OVERFLOW_Q \
51  ((_FP_W_TYPE)1 << (_FP_WFRACBITS_Q % _FP_W_TYPE_SIZE))
52 
53 #if _FP_W_TYPE_SIZE < 64
54 
55 union _FP_UNION_Q
56 {
57  long double flt;
58  struct
59  {
60 #if __BYTE_ORDER == __BIG_ENDIAN
61  unsigned sign : 1;
62  unsigned exp : _FP_EXPBITS_Q;
63  unsigned long frac3 : _FP_FRACBITS_Q - (_FP_IMPLBIT_Q != 0)-(_FP_W_TYPE_SIZE * 3);
64  unsigned long frac2 : _FP_W_TYPE_SIZE;
65  unsigned long frac1 : _FP_W_TYPE_SIZE;
66  unsigned long frac0 : _FP_W_TYPE_SIZE;
67 #else
68  unsigned long frac0 : _FP_W_TYPE_SIZE;
69  unsigned long frac1 : _FP_W_TYPE_SIZE;
70  unsigned long frac2 : _FP_W_TYPE_SIZE;
71  unsigned long frac3 : _FP_FRACBITS_Q - (_FP_IMPLBIT_Q != 0)-(_FP_W_TYPE_SIZE * 3);
72  unsigned exp : _FP_EXPBITS_Q;
73  unsigned sign : 1;
74 #endif /* not bigendian */
75  } bits __attribute__((packed));
76 };
77 
78 
79 #define FP_DECL_Q(X) _FP_DECL(4,X)
80 #define FP_UNPACK_RAW_Q(X,val) _FP_UNPACK_RAW_4(Q,X,val)
81 #define FP_UNPACK_RAW_QP(X,val) _FP_UNPACK_RAW_4_P(Q,X,val)
82 #define FP_PACK_RAW_Q(val,X) _FP_PACK_RAW_4(Q,val,X)
83 #define FP_PACK_RAW_QP(val,X) \
84  do { \
85  if (!FP_INHIBIT_RESULTS) \
86  _FP_PACK_RAW_4_P(Q,val,X); \
87  } while (0)
88 
89 #define FP_UNPACK_Q(X,val) \
90  do { \
91  _FP_UNPACK_RAW_4(Q,X,val); \
92  _FP_UNPACK_CANONICAL(Q,4,X); \
93  } while (0)
94 
95 #define FP_UNPACK_QP(X,val) \
96  do { \
97  _FP_UNPACK_RAW_4_P(Q,X,val); \
98  _FP_UNPACK_CANONICAL(Q,4,X); \
99  } while (0)
100 
101 #define FP_PACK_Q(val,X) \
102  do { \
103  _FP_PACK_CANONICAL(Q,4,X); \
104  _FP_PACK_RAW_4(Q,val,X); \
105  } while (0)
106 
107 #define FP_PACK_QP(val,X) \
108  do { \
109  _FP_PACK_CANONICAL(Q,4,X); \
110  if (!FP_INHIBIT_RESULTS) \
111  _FP_PACK_RAW_4_P(Q,val,X); \
112  } while (0)
113 
114 #define FP_ISSIGNAN_Q(X) _FP_ISSIGNAN(Q,4,X)
115 #define FP_NEG_Q(R,X) _FP_NEG(Q,4,R,X)
116 #define FP_ADD_Q(R,X,Y) _FP_ADD(Q,4,R,X,Y)
117 #define FP_SUB_Q(R,X,Y) _FP_SUB(Q,4,R,X,Y)
118 #define FP_MUL_Q(R,X,Y) _FP_MUL(Q,4,R,X,Y)
119 #define FP_DIV_Q(R,X,Y) _FP_DIV(Q,4,R,X,Y)
120 #define FP_SQRT_Q(R,X) _FP_SQRT(Q,4,R,X)
121 #define _FP_SQRT_MEAT_Q(R,S,T,X,Q) _FP_SQRT_MEAT_4(R,S,T,X,Q)
122 
123 #define FP_CMP_Q(r,X,Y,un) _FP_CMP(Q,4,r,X,Y,un)
124 #define FP_CMP_EQ_Q(r,X,Y) _FP_CMP_EQ(Q,4,r,X,Y)
125 
126 #define FP_TO_INT_Q(r,X,rsz,rsg) _FP_TO_INT(Q,4,r,X,rsz,rsg)
127 #define FP_TO_INT_ROUND_Q(r,X,rsz,rsg) _FP_TO_INT_ROUND(Q,4,r,X,rsz,rsg)
128 #define FP_FROM_INT_Q(X,r,rs,rt) _FP_FROM_INT(Q,4,X,r,rs,rt)
129 
130 #define _FP_FRAC_HIGH_Q(X) _FP_FRAC_HIGH_4(X)
131 #define _FP_FRAC_HIGH_RAW_Q(X) _FP_FRAC_HIGH_4(X)
132 
133 #else /* not _FP_W_TYPE_SIZE < 64 */
134 union _FP_UNION_Q
135 {
136  long double flt /* __attribute__((mode(TF))) */ ;
137  struct {
138 #if __BYTE_ORDER == __BIG_ENDIAN
139  unsigned sign : 1;
140  unsigned exp : _FP_EXPBITS_Q;
141  unsigned long frac1 : _FP_FRACBITS_Q-(_FP_IMPLBIT_Q != 0)-_FP_W_TYPE_SIZE;
142  unsigned long frac0 : _FP_W_TYPE_SIZE;
143 #else
144  unsigned long frac0 : _FP_W_TYPE_SIZE;
145  unsigned long frac1 : _FP_FRACBITS_Q-(_FP_IMPLBIT_Q != 0)-_FP_W_TYPE_SIZE;
146  unsigned exp : _FP_EXPBITS_Q;
147  unsigned sign : 1;
148 #endif
149  } bits;
150 };
151 
152 #define FP_DECL_Q(X) _FP_DECL(2,X)
153 #define FP_UNPACK_RAW_Q(X,val) _FP_UNPACK_RAW_2(Q,X,val)
154 #define FP_UNPACK_RAW_QP(X,val) _FP_UNPACK_RAW_2_P(Q,X,val)
155 #define FP_PACK_RAW_Q(val,X) _FP_PACK_RAW_2(Q,val,X)
156 #define FP_PACK_RAW_QP(val,X) \
157  do { \
158  if (!FP_INHIBIT_RESULTS) \
159  _FP_PACK_RAW_2_P(Q,val,X); \
160  } while (0)
161 
162 #define FP_UNPACK_Q(X,val) \
163  do { \
164  _FP_UNPACK_RAW_2(Q,X,val); \
165  _FP_UNPACK_CANONICAL(Q,2,X); \
166  } while (0)
167 
168 #define FP_UNPACK_QP(X,val) \
169  do { \
170  _FP_UNPACK_RAW_2_P(Q,X,val); \
171  _FP_UNPACK_CANONICAL(Q,2,X); \
172  } while (0)
173 
174 #define FP_PACK_Q(val,X) \
175  do { \
176  _FP_PACK_CANONICAL(Q,2,X); \
177  _FP_PACK_RAW_2(Q,val,X); \
178  } while (0)
179 
180 #define FP_PACK_QP(val,X) \
181  do { \
182  _FP_PACK_CANONICAL(Q,2,X); \
183  if (!FP_INHIBIT_RESULTS) \
184  _FP_PACK_RAW_2_P(Q,val,X); \
185  } while (0)
186 
187 #define FP_ISSIGNAN_Q(X) _FP_ISSIGNAN(Q,2,X)
188 #define FP_NEG_Q(R,X) _FP_NEG(Q,2,R,X)
189 #define FP_ADD_Q(R,X,Y) _FP_ADD(Q,2,R,X,Y)
190 #define FP_SUB_Q(R,X,Y) _FP_SUB(Q,2,R,X,Y)
191 #define FP_MUL_Q(R,X,Y) _FP_MUL(Q,2,R,X,Y)
192 #define FP_DIV_Q(R,X,Y) _FP_DIV(Q,2,R,X,Y)
193 #define FP_SQRT_Q(R,X) _FP_SQRT(Q,2,R,X)
194 #define _FP_SQRT_MEAT_Q(R,S,T,X,Q) _FP_SQRT_MEAT_2(R,S,T,X,Q)
195 
196 #define FP_CMP_Q(r,X,Y,un) _FP_CMP(Q,2,r,X,Y,un)
197 #define FP_CMP_EQ_Q(r,X,Y) _FP_CMP_EQ(Q,2,r,X,Y)
198 
199 #define FP_TO_INT_Q(r,X,rsz,rsg) _FP_TO_INT(Q,2,r,X,rsz,rsg)
200 #define FP_TO_INT_ROUND_Q(r,X,rsz,rsg) _FP_TO_INT_ROUND(Q,2,r,X,rsz,rsg)
201 #define FP_FROM_INT_Q(X,r,rs,rt) _FP_FROM_INT(Q,2,X,r,rs,rt)
202 
203 #define _FP_FRAC_HIGH_Q(X) _FP_FRAC_HIGH_2(X)
204 #define _FP_FRAC_HIGH_RAW_Q(X) _FP_FRAC_HIGH_2(X)
205 
206 #endif /* not _FP_W_TYPE_SIZE < 64 */
207 
208 #endif /* __MATH_EMU_QUAD_H__ */
Generated on Thu Jan 10 2013 14:52:52 for Linux Kernel by   doxygen 1.8.2