1 | /* Software floating-point emulation. |
2 | Definitions for IEEE Single Precision. |
3 | Copyright (C) 1997-2022 Free Software Foundation, Inc. |
4 | This file is part of the GNU C Library. |
5 | |
6 | The GNU C Library is free software; you can redistribute it and/or |
7 | modify it under the terms of the GNU Lesser General Public |
8 | License as published by the Free Software Foundation; either |
9 | version 2.1 of the License, or (at your option) any later version. |
10 | |
11 | In addition to the permissions in the GNU Lesser General Public |
12 | License, the Free Software Foundation gives you unlimited |
13 | permission to link the compiled version of this file into |
14 | combinations with other programs, and to distribute those |
15 | combinations without any restriction coming from the use of this |
16 | file. (The Lesser General Public License restrictions do apply in |
17 | other respects; for example, they cover modification of the file, |
18 | and distribution when not linked into a combine executable.) |
19 | |
20 | The GNU C Library is distributed in the hope that it will be useful, |
21 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
22 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
23 | Lesser General Public License for more details. |
24 | |
25 | You should have received a copy of the GNU Lesser General Public |
26 | License along with the GNU C Library; if not, see |
27 | <https://www.gnu.org/licenses/>. */ |
28 | |
29 | #ifndef SOFT_FP_SINGLE_H |
30 | #define SOFT_FP_SINGLE_H 1 |
31 | |
32 | #if _FP_W_TYPE_SIZE < 32 |
33 | # error "Here's a nickel kid. Go buy yourself a real computer." |
34 | #endif |
35 | |
36 | #define _FP_FRACTBITS_S _FP_W_TYPE_SIZE |
37 | |
38 | #if _FP_W_TYPE_SIZE < 64 |
39 | # define _FP_FRACTBITS_DW_S (2 * _FP_W_TYPE_SIZE) |
40 | #else |
41 | # define _FP_FRACTBITS_DW_S _FP_W_TYPE_SIZE |
42 | #endif |
43 | |
44 | #define _FP_FRACBITS_S 24 |
45 | #define _FP_FRACXBITS_S (_FP_FRACTBITS_S - _FP_FRACBITS_S) |
46 | #define _FP_WFRACBITS_S (_FP_WORKBITS + _FP_FRACBITS_S) |
47 | #define _FP_WFRACXBITS_S (_FP_FRACTBITS_S - _FP_WFRACBITS_S) |
48 | #define _FP_EXPBITS_S 8 |
49 | #define _FP_EXPBIAS_S 127 |
50 | #define _FP_EXPMAX_S 255 |
51 | #define _FP_QNANBIT_S ((_FP_W_TYPE) 1 << (_FP_FRACBITS_S-2)) |
52 | #define _FP_QNANBIT_SH_S ((_FP_W_TYPE) 1 << (_FP_FRACBITS_S-2+_FP_WORKBITS)) |
53 | #define _FP_IMPLBIT_S ((_FP_W_TYPE) 1 << (_FP_FRACBITS_S-1)) |
54 | #define _FP_IMPLBIT_SH_S ((_FP_W_TYPE) 1 << (_FP_FRACBITS_S-1+_FP_WORKBITS)) |
55 | #define _FP_OVERFLOW_S ((_FP_W_TYPE) 1 << (_FP_WFRACBITS_S)) |
56 | |
57 | #define _FP_WFRACBITS_DW_S (2 * _FP_WFRACBITS_S) |
58 | #define _FP_WFRACXBITS_DW_S (_FP_FRACTBITS_DW_S - _FP_WFRACBITS_DW_S) |
59 | #define _FP_HIGHBIT_DW_S \ |
60 | ((_FP_W_TYPE) 1 << (_FP_WFRACBITS_DW_S - 1) % _FP_W_TYPE_SIZE) |
61 | |
62 | /* The implementation of _FP_MUL_MEAT_S and _FP_DIV_MEAT_S should be |
63 | chosen by the target machine. */ |
64 | |
65 | typedef float SFtype __attribute__ ((mode (SF))); |
66 | |
67 | union _FP_UNION_S |
68 | { |
69 | SFtype flt; |
70 | struct _FP_STRUCT_LAYOUT |
71 | { |
72 | #if __BYTE_ORDER == __BIG_ENDIAN |
73 | unsigned sign : 1; |
74 | unsigned exp : _FP_EXPBITS_S; |
75 | unsigned frac : _FP_FRACBITS_S - (_FP_IMPLBIT_S != 0); |
76 | #else |
77 | unsigned frac : _FP_FRACBITS_S - (_FP_IMPLBIT_S != 0); |
78 | unsigned exp : _FP_EXPBITS_S; |
79 | unsigned sign : 1; |
80 | #endif |
81 | } bits; |
82 | }; |
83 | |
84 | #define FP_DECL_S(X) _FP_DECL (1, X) |
85 | #define FP_UNPACK_RAW_S(X, val) _FP_UNPACK_RAW_1 (S, X, (val)) |
86 | #define FP_UNPACK_RAW_SP(X, val) _FP_UNPACK_RAW_1_P (S, X, (val)) |
87 | #define FP_PACK_RAW_S(val, X) _FP_PACK_RAW_1 (S, (val), X) |
88 | #define FP_PACK_RAW_SP(val, X) \ |
89 | do \ |
90 | { \ |
91 | if (!FP_INHIBIT_RESULTS) \ |
92 | _FP_PACK_RAW_1_P (S, (val), X); \ |
93 | } \ |
94 | while (0) |
95 | |
96 | #define FP_UNPACK_S(X, val) \ |
97 | do \ |
98 | { \ |
99 | _FP_UNPACK_RAW_1 (S, X, (val)); \ |
100 | _FP_UNPACK_CANONICAL (S, 1, X); \ |
101 | } \ |
102 | while (0) |
103 | |
104 | #define FP_UNPACK_SP(X, val) \ |
105 | do \ |
106 | { \ |
107 | _FP_UNPACK_RAW_1_P (S, X, (val)); \ |
108 | _FP_UNPACK_CANONICAL (S, 1, X); \ |
109 | } \ |
110 | while (0) |
111 | |
112 | #define FP_UNPACK_SEMIRAW_S(X, val) \ |
113 | do \ |
114 | { \ |
115 | _FP_UNPACK_RAW_1 (S, X, (val)); \ |
116 | _FP_UNPACK_SEMIRAW (S, 1, X); \ |
117 | } \ |
118 | while (0) |
119 | |
120 | #define FP_UNPACK_SEMIRAW_SP(X, val) \ |
121 | do \ |
122 | { \ |
123 | _FP_UNPACK_RAW_1_P (S, X, (val)); \ |
124 | _FP_UNPACK_SEMIRAW (S, 1, X); \ |
125 | } \ |
126 | while (0) |
127 | |
128 | #define FP_PACK_S(val, X) \ |
129 | do \ |
130 | { \ |
131 | _FP_PACK_CANONICAL (S, 1, X); \ |
132 | _FP_PACK_RAW_1 (S, (val), X); \ |
133 | } \ |
134 | while (0) |
135 | |
136 | #define FP_PACK_SP(val, X) \ |
137 | do \ |
138 | { \ |
139 | _FP_PACK_CANONICAL (S, 1, X); \ |
140 | if (!FP_INHIBIT_RESULTS) \ |
141 | _FP_PACK_RAW_1_P (S, (val), X); \ |
142 | } \ |
143 | while (0) |
144 | |
145 | #define FP_PACK_SEMIRAW_S(val, X) \ |
146 | do \ |
147 | { \ |
148 | _FP_PACK_SEMIRAW (S, 1, X); \ |
149 | _FP_PACK_RAW_1 (S, (val), X); \ |
150 | } \ |
151 | while (0) |
152 | |
153 | #define FP_PACK_SEMIRAW_SP(val, X) \ |
154 | do \ |
155 | { \ |
156 | _FP_PACK_SEMIRAW (S, 1, X); \ |
157 | if (!FP_INHIBIT_RESULTS) \ |
158 | _FP_PACK_RAW_1_P (S, (val), X); \ |
159 | } \ |
160 | while (0) |
161 | |
162 | #define FP_ISSIGNAN_S(X) _FP_ISSIGNAN (S, 1, X) |
163 | #define FP_NEG_S(R, X) _FP_NEG (S, 1, R, X) |
164 | #define FP_ADD_S(R, X, Y) _FP_ADD (S, 1, R, X, Y) |
165 | #define FP_SUB_S(R, X, Y) _FP_SUB (S, 1, R, X, Y) |
166 | #define FP_MUL_S(R, X, Y) _FP_MUL (S, 1, R, X, Y) |
167 | #define FP_DIV_S(R, X, Y) _FP_DIV (S, 1, R, X, Y) |
168 | #define FP_SQRT_S(R, X) _FP_SQRT (S, 1, R, X) |
169 | #define _FP_SQRT_MEAT_S(R, S, T, X, Q) _FP_SQRT_MEAT_1 (R, S, T, X, (Q)) |
170 | |
171 | #if _FP_W_TYPE_SIZE < 64 |
172 | # define FP_FMA_S(R, X, Y, Z) _FP_FMA (S, 1, 2, R, X, Y, Z) |
173 | #else |
174 | # define FP_FMA_S(R, X, Y, Z) _FP_FMA (S, 1, 1, R, X, Y, Z) |
175 | #endif |
176 | |
177 | #define FP_CMP_S(r, X, Y, un, ex) _FP_CMP (S, 1, (r), X, Y, (un), (ex)) |
178 | #define FP_CMP_EQ_S(r, X, Y, ex) _FP_CMP_EQ (S, 1, (r), X, Y, (ex)) |
179 | #define FP_CMP_UNORD_S(r, X, Y, ex) _FP_CMP_UNORD (S, 1, (r), X, Y, (ex)) |
180 | |
181 | #define FP_TO_INT_S(r, X, rsz, rsg) _FP_TO_INT (S, 1, (r), X, (rsz), (rsg)) |
182 | #define FP_TO_INT_ROUND_S(r, X, rsz, rsg) \ |
183 | _FP_TO_INT_ROUND (S, 1, (r), X, (rsz), (rsg)) |
184 | #define FP_FROM_INT_S(X, r, rs, rt) _FP_FROM_INT (S, 1, X, (r), (rs), rt) |
185 | |
186 | #define _FP_FRAC_HIGH_S(X) _FP_FRAC_HIGH_1 (X) |
187 | #define _FP_FRAC_HIGH_RAW_S(X) _FP_FRAC_HIGH_1 (X) |
188 | |
189 | #if _FP_W_TYPE_SIZE < 64 |
190 | # define _FP_FRAC_HIGH_DW_S(X) _FP_FRAC_HIGH_2 (X) |
191 | #else |
192 | # define _FP_FRAC_HIGH_DW_S(X) _FP_FRAC_HIGH_1 (X) |
193 | #endif |
194 | |
195 | #endif /* !SOFT_FP_SINGLE_H */ |
196 | |