2007-11-11 Roland McGrath <roland@frob.com>
[glibc.git] / soft-fp / single.h
blob9c3734adf48f68a7289d30aaf48f09b599ef8960
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).
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, write to the Free
31 Software Foundation, 51 Franklin Street, Fifth Floor, Boston,
32 MA 02110-1301, USA. */
34 #if _FP_W_TYPE_SIZE < 32
35 #error "Here's a nickel kid. Go buy yourself a real computer."
36 #endif
38 #define _FP_FRACTBITS_S _FP_W_TYPE_SIZE
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))
53 /* The implementation of _FP_MUL_MEAT_S and _FP_DIV_MEAT_S should be
54 chosen by the target machine. */
56 typedef float SFtype __attribute__((mode(SF)));
58 union _FP_UNION_S
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));
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)
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)
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)
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)
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)
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)
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)
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)
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)
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)
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)
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)
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)