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