1 /* Software floating-point emulation.
2 Definitions for IEEE Single Precision.
3 Copyright (C) 1997-2015 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).
10 The GNU C Library is free software; you can redistribute it and/or
11 modify it under the terms of the GNU Lesser General Public
12 License as published by the Free Software Foundation; either
13 version 2.1 of the License, or (at your option) any later version.
15 In addition to the permissions in the GNU Lesser General Public
16 License, the Free Software Foundation gives you unlimited
17 permission to link the compiled version of this file into
18 combinations with other programs, and to distribute those
19 combinations without any restriction coming from the use of this
20 file. (The Lesser General Public License restrictions do apply in
21 other respects; for example, they cover modification of the file,
22 and distribution when not linked into a combine executable.)
24 The GNU C Library is distributed in the hope that it will be useful,
25 but WITHOUT ANY WARRANTY; without even the implied warranty of
26 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
27 Lesser General Public License for more details.
29 You should have received a copy of the GNU Lesser General Public
30 License along with the GNU C Library; if not, see
31 <http://www.gnu.org/licenses/>. */
33 #if _FP_W_TYPE_SIZE < 32
34 # error "Here's a nickel kid. Go buy yourself a real computer."
37 #define _FP_FRACTBITS_S _FP_W_TYPE_SIZE
39 #if _FP_W_TYPE_SIZE < 64
40 # define _FP_FRACTBITS_DW_S (2 * _FP_W_TYPE_SIZE)
42 # define _FP_FRACTBITS_DW_S _FP_W_TYPE_SIZE
45 #define _FP_FRACBITS_S 24
46 #define _FP_FRACXBITS_S (_FP_FRACTBITS_S - _FP_FRACBITS_S)
47 #define _FP_WFRACBITS_S (_FP_WORKBITS + _FP_FRACBITS_S)
48 #define _FP_WFRACXBITS_S (_FP_FRACTBITS_S - _FP_WFRACBITS_S)
49 #define _FP_EXPBITS_S 8
50 #define _FP_EXPBIAS_S 127
51 #define _FP_EXPMAX_S 255
52 #define _FP_QNANBIT_S ((_FP_W_TYPE) 1 << (_FP_FRACBITS_S-2))
53 #define _FP_QNANBIT_SH_S ((_FP_W_TYPE) 1 << (_FP_FRACBITS_S-2+_FP_WORKBITS))
54 #define _FP_IMPLBIT_S ((_FP_W_TYPE) 1 << (_FP_FRACBITS_S-1))
55 #define _FP_IMPLBIT_SH_S ((_FP_W_TYPE) 1 << (_FP_FRACBITS_S-1+_FP_WORKBITS))
56 #define _FP_OVERFLOW_S ((_FP_W_TYPE) 1 << (_FP_WFRACBITS_S))
58 #define _FP_WFRACBITS_DW_S (2 * _FP_WFRACBITS_S)
59 #define _FP_WFRACXBITS_DW_S (_FP_FRACTBITS_DW_S - _FP_WFRACBITS_DW_S)
60 #define _FP_HIGHBIT_DW_S \
61 ((_FP_W_TYPE) 1 << (_FP_WFRACBITS_DW_S - 1) % _FP_W_TYPE_SIZE)
63 /* The implementation of _FP_MUL_MEAT_S and _FP_DIV_MEAT_S should be
64 chosen by the target machine. */
66 typedef float SFtype __attribute__ ((mode (SF)));
71 struct _FP_STRUCT_LAYOUT
73 #if __BYTE_ORDER == __BIG_ENDIAN
75 unsigned exp : _FP_EXPBITS_S;
76 unsigned frac : _FP_FRACBITS_S - (_FP_IMPLBIT_S != 0);
78 unsigned frac : _FP_FRACBITS_S - (_FP_IMPLBIT_S != 0);
79 unsigned exp : _FP_EXPBITS_S;
82 } bits __attribute__ ((packed));
85 #define FP_DECL_S(X) _FP_DECL (1, X)
86 #define FP_UNPACK_RAW_S(X, val) _FP_UNPACK_RAW_1 (S, X, (val))
87 #define FP_UNPACK_RAW_SP(X, val) _FP_UNPACK_RAW_1_P (S, X, (val))
88 #define FP_PACK_RAW_S(val, X) _FP_PACK_RAW_1 (S, (val), X)
89 #define FP_PACK_RAW_SP(val, X) \
92 if (!FP_INHIBIT_RESULTS) \
93 _FP_PACK_RAW_1_P (S, (val), X); \
97 #define FP_UNPACK_S(X, val) \
100 _FP_UNPACK_RAW_1 (S, X, (val)); \
101 _FP_UNPACK_CANONICAL (S, 1, X); \
105 #define FP_UNPACK_SP(X, val) \
108 _FP_UNPACK_RAW_1_P (S, X, (val)); \
109 _FP_UNPACK_CANONICAL (S, 1, X); \
113 #define FP_UNPACK_SEMIRAW_S(X, val) \
116 _FP_UNPACK_RAW_1 (S, X, (val)); \
117 _FP_UNPACK_SEMIRAW (S, 1, X); \
121 #define FP_UNPACK_SEMIRAW_SP(X, val) \
124 _FP_UNPACK_RAW_1_P (S, X, (val)); \
125 _FP_UNPACK_SEMIRAW (S, 1, X); \
129 #define FP_PACK_S(val, X) \
132 _FP_PACK_CANONICAL (S, 1, X); \
133 _FP_PACK_RAW_1 (S, (val), X); \
137 #define FP_PACK_SP(val, X) \
140 _FP_PACK_CANONICAL (S, 1, X); \
141 if (!FP_INHIBIT_RESULTS) \
142 _FP_PACK_RAW_1_P (S, (val), X); \
146 #define FP_PACK_SEMIRAW_S(val, X) \
149 _FP_PACK_SEMIRAW (S, 1, X); \
150 _FP_PACK_RAW_1 (S, (val), X); \
154 #define FP_PACK_SEMIRAW_SP(val, X) \
157 _FP_PACK_SEMIRAW (S, 1, X); \
158 if (!FP_INHIBIT_RESULTS) \
159 _FP_PACK_RAW_1_P (S, (val), X); \
163 #define FP_ISSIGNAN_S(X) _FP_ISSIGNAN (S, 1, X)
164 #define FP_NEG_S(R, X) _FP_NEG (S, 1, R, X)
165 #define FP_ADD_S(R, X, Y) _FP_ADD (S, 1, R, X, Y)
166 #define FP_SUB_S(R, X, Y) _FP_SUB (S, 1, R, X, Y)
167 #define FP_MUL_S(R, X, Y) _FP_MUL (S, 1, R, X, Y)
168 #define FP_DIV_S(R, X, Y) _FP_DIV (S, 1, R, X, Y)
169 #define FP_SQRT_S(R, X) _FP_SQRT (S, 1, R, X)
170 #define _FP_SQRT_MEAT_S(R, S, T, X, Q) _FP_SQRT_MEAT_1 (R, S, T, X, (Q))
172 #if _FP_W_TYPE_SIZE < 64
173 # define FP_FMA_S(R, X, Y, Z) _FP_FMA (S, 1, 2, R, X, Y, Z)
175 # define FP_FMA_S(R, X, Y, Z) _FP_FMA (S, 1, 1, R, X, Y, Z)
178 #define FP_CMP_S(r, X, Y, un, ex) _FP_CMP (S, 1, (r), X, Y, (un), (ex))
179 #define FP_CMP_EQ_S(r, X, Y, ex) _FP_CMP_EQ (S, 1, (r), X, Y, (ex))
180 #define FP_CMP_UNORD_S(r, X, Y, ex) _FP_CMP_UNORD (S, 1, (r), X, Y, (ex))
182 #define FP_TO_INT_S(r, X, rsz, rsg) _FP_TO_INT (S, 1, (r), X, (rsz), (rsg))
183 #define FP_TO_INT_ROUND_S(r, X, rsz, rsg) \
184 _FP_TO_INT_ROUND (S, 1, (r), X, (rsz), (rsg))
185 #define FP_FROM_INT_S(X, r, rs, rt) _FP_FROM_INT (S, 1, X, (r), (rs), rt)
187 #define _FP_FRAC_HIGH_S(X) _FP_FRAC_HIGH_1 (X)
188 #define _FP_FRAC_HIGH_RAW_S(X) _FP_FRAC_HIGH_1 (X)
190 #if _FP_W_TYPE_SIZE < 64
191 # define _FP_FRAC_HIGH_DW_S(X) _FP_FRAC_HIGH_2 (X)
193 # define _FP_FRAC_HIGH_DW_S(X) _FP_FRAC_HIGH_1 (X)