Merge tag 'disintegrate-fbdev-20121220' of git://git.infradead.org/users/dhowells...
[linux-3.10.git] / include / math-emu / quad.h
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 (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
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__ */