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1 | /* Software floating-point emulation. |
2 | Definitions for IEEE Single Precision. | |
3 | Copyright (C) 1997,1998,1999,2006 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 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. | |
14 | ||
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.) | |
23 | ||
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. | |
28 | ||
29 | You should have received a copy of the GNU Lesser General Public | |
30 | License along with the GNU C Library; if not, write to the Free | |
31 | Software Foundation, 51 Franklin Street, Fifth Floor, Boston, | |
32 | MA 02110-1301, USA. */ | |
33 | ||
34 | #if _FP_W_TYPE_SIZE < 32 | |
35 | #error "Here's a nickel kid. Go buy yourself a real computer." | |
36 | #endif | |
37 | ||
38 | #define _FP_FRACTBITS_S _FP_W_TYPE_SIZE | |
39 | ||
40 | #define _FP_FRACBITS_S 24 | |
41 | #define _FP_FRACXBITS_S (_FP_FRACTBITS_S - _FP_FRACBITS_S) | |
42 | #define _FP_WFRACBITS_S (_FP_WORKBITS + _FP_FRACBITS_S) | |
43 | #define _FP_WFRACXBITS_S (_FP_FRACTBITS_S - _FP_WFRACBITS_S) | |
44 | #define _FP_EXPBITS_S 8 | |
45 | #define _FP_EXPBIAS_S 127 | |
46 | #define _FP_EXPMAX_S 255 | |
47 | #define _FP_QNANBIT_S ((_FP_W_TYPE)1 << (_FP_FRACBITS_S-2)) | |
48 | #define _FP_QNANBIT_SH_S ((_FP_W_TYPE)1 << (_FP_FRACBITS_S-2+_FP_WORKBITS)) | |
49 | #define _FP_IMPLBIT_S ((_FP_W_TYPE)1 << (_FP_FRACBITS_S-1)) | |
50 | #define _FP_IMPLBIT_SH_S ((_FP_W_TYPE)1 << (_FP_FRACBITS_S-1+_FP_WORKBITS)) | |
51 | #define _FP_OVERFLOW_S ((_FP_W_TYPE)1 << (_FP_WFRACBITS_S)) | |
52 | ||
53 | /* The implementation of _FP_MUL_MEAT_S and _FP_DIV_MEAT_S should be | |
54 | chosen by the target machine. */ | |
55 | ||
56 | typedef float SFtype __attribute__((mode(SF))); | |
57 | ||
58 | union _FP_UNION_S | |
59 | { | |
60 | SFtype flt; | |
61 | struct { | |
62 | #if __BYTE_ORDER == __BIG_ENDIAN | |
63 | unsigned sign : 1; | |
64 | unsigned exp : _FP_EXPBITS_S; | |
65 | unsigned frac : _FP_FRACBITS_S - (_FP_IMPLBIT_S != 0); | |
66 | #else | |
67 | unsigned frac : _FP_FRACBITS_S - (_FP_IMPLBIT_S != 0); | |
68 | unsigned exp : _FP_EXPBITS_S; | |
69 | unsigned sign : 1; | |
70 | #endif | |
71 | } bits __attribute__((packed)); | |
72 | }; | |
73 | ||
74 | #define FP_DECL_S(X) _FP_DECL(1,X) | |
75 | #define FP_UNPACK_RAW_S(X,val) _FP_UNPACK_RAW_1(S,X,val) | |
76 | #define FP_UNPACK_RAW_SP(X,val) _FP_UNPACK_RAW_1_P(S,X,val) | |
77 | #define FP_PACK_RAW_S(val,X) _FP_PACK_RAW_1(S,val,X) | |
78 | #define FP_PACK_RAW_SP(val,X) \ | |
79 | do { \ | |
80 | if (!FP_INHIBIT_RESULTS) \ | |
81 | _FP_PACK_RAW_1_P(S,val,X); \ | |
82 | } while (0) | |
83 | ||
84 | #define FP_UNPACK_S(X,val) \ | |
85 | do { \ | |
86 | _FP_UNPACK_RAW_1(S,X,val); \ | |
87 | _FP_UNPACK_CANONICAL(S,1,X); \ | |
88 | } while (0) | |
89 | ||
90 | #define FP_UNPACK_SP(X,val) \ | |
91 | do { \ | |
92 | _FP_UNPACK_RAW_1_P(S,X,val); \ | |
93 | _FP_UNPACK_CANONICAL(S,1,X); \ | |
94 | } while (0) | |
95 | ||
96 | #define FP_UNPACK_SEMIRAW_S(X,val) \ | |
97 | do { \ | |
98 | _FP_UNPACK_RAW_1(S,X,val); \ | |
99 | _FP_UNPACK_SEMIRAW(S,1,X); \ | |
100 | } while (0) | |
101 | ||
102 | #define FP_UNPACK_SEMIRAW_SP(X,val) \ | |
103 | do { \ | |
104 | _FP_UNPACK_RAW_1_P(S,X,val); \ | |
105 | _FP_UNPACK_SEMIRAW(S,1,X); \ | |
106 | } while (0) | |
107 | ||
108 | #define FP_PACK_S(val,X) \ | |
109 | do { \ | |
110 | _FP_PACK_CANONICAL(S,1,X); \ | |
111 | _FP_PACK_RAW_1(S,val,X); \ | |
112 | } while (0) | |
113 | ||
114 | #define FP_PACK_SP(val,X) \ | |
115 | do { \ | |
116 | _FP_PACK_CANONICAL(S,1,X); \ | |
117 | if (!FP_INHIBIT_RESULTS) \ | |
118 | _FP_PACK_RAW_1_P(S,val,X); \ | |
119 | } while (0) | |
120 | ||
121 | #define FP_PACK_SEMIRAW_S(val,X) \ | |
122 | do { \ | |
123 | _FP_PACK_SEMIRAW(S,1,X); \ | |
124 | _FP_PACK_RAW_1(S,val,X); \ | |
125 | } while (0) | |
126 | ||
127 | #define FP_PACK_SEMIRAW_SP(val,X) \ | |
128 | do { \ | |
129 | _FP_PACK_SEMIRAW(S,1,X); \ | |
130 | if (!FP_INHIBIT_RESULTS) \ | |
131 | _FP_PACK_RAW_1_P(S,val,X); \ | |
132 | } while (0) | |
133 | ||
134 | #define FP_ISSIGNAN_S(X) _FP_ISSIGNAN(S,1,X) | |
135 | #define FP_NEG_S(R,X) _FP_NEG(S,1,R,X) | |
136 | #define FP_ADD_S(R,X,Y) _FP_ADD(S,1,R,X,Y) | |
137 | #define FP_SUB_S(R,X,Y) _FP_SUB(S,1,R,X,Y) | |
138 | #define FP_MUL_S(R,X,Y) _FP_MUL(S,1,R,X,Y) | |
139 | #define FP_DIV_S(R,X,Y) _FP_DIV(S,1,R,X,Y) | |
140 | #define FP_SQRT_S(R,X) _FP_SQRT(S,1,R,X) | |
141 | #define _FP_SQRT_MEAT_S(R,S,T,X,Q) _FP_SQRT_MEAT_1(R,S,T,X,Q) | |
142 | ||
143 | #define FP_CMP_S(r,X,Y,un) _FP_CMP(S,1,r,X,Y,un) | |
144 | #define FP_CMP_EQ_S(r,X,Y) _FP_CMP_EQ(S,1,r,X,Y) | |
145 | #define FP_CMP_UNORD_S(r,X,Y) _FP_CMP_UNORD(S,1,r,X,Y) | |
146 | ||
147 | #define FP_TO_INT_S(r,X,rsz,rsg) _FP_TO_INT(S,1,r,X,rsz,rsg) | |
148 | #define FP_FROM_INT_S(X,r,rs,rt) _FP_FROM_INT(S,1,X,r,rs,rt) | |
149 | ||
150 | #define _FP_FRAC_HIGH_S(X) _FP_FRAC_HIGH_1(X) | |
151 | #define _FP_FRAC_HIGH_RAW_S(X) _FP_FRAC_HIGH_1(X) |