1 /* Software floating-point emulation.
2 Copyright (C) 1997,1998,1999,2000,2002,2003,2005
3 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 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 Lesser General Public License for more details.
20 You should have received a copy of the GNU Lesser General Public
21 License along with the GNU C Library; if not, write to the Free
22 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
28 #include <sfp-machine.h>
30 /* Allow sfp-machine to have its own byte order definitions. */
35 #define _FP_WORKBITS 3
36 #define _FP_WORK_LSB ((_FP_W_TYPE)1 << 3)
37 #define _FP_WORK_ROUND ((_FP_W_TYPE)1 << 2)
38 #define _FP_WORK_GUARD ((_FP_W_TYPE)1 << 1)
39 #define _FP_WORK_STICKY ((_FP_W_TYPE)1 << 0)
41 #ifndef FP_RND_NEAREST
42 # define FP_RND_NEAREST 0
43 # define FP_RND_ZERO 1
44 # define FP_RND_PINF 2
45 # define FP_RND_MINF 3
48 # define FP_ROUNDMODE FP_RND_NEAREST
51 /* By default don't care about exceptions. */
53 #define FP_EX_INVALID 0
55 #ifndef FP_EX_OVERFLOW
56 #define FP_EX_OVERFLOW 0
58 #ifndef FP_EX_UNDERFLOW
59 #define FP_EX_UNDERFLOW 0
62 #define FP_EX_DIVZERO 0
65 #define FP_EX_INEXACT 0
68 #define FP_EX_DENORM 0
76 #define FP_DECL_EX int _fex = 0
79 #ifndef FP_INIT_ROUNDMODE
80 #define FP_INIT_ROUNDMODE do {} while (0)
83 #ifndef FP_HANDLE_EXCEPTIONS
84 #define FP_HANDLE_EXCEPTIONS do {} while (0)
87 #ifndef FP_INHIBIT_RESULTS
88 /* By default we write the results always.
89 * sfp-machine may override this and e.g.
90 * check if some exceptions are unmasked
91 * and inhibit it in such a case.
93 #define FP_INHIBIT_RESULTS 0
96 #define FP_SET_EXCEPTION(ex) \
99 #define FP_UNSET_EXCEPTION(ex) \
102 #define FP_CLEAR_EXCEPTIONS \
105 #define _FP_ROUND_NEAREST(wc, X) \
107 if ((_FP_FRAC_LOW_##wc(X) & 15) != _FP_WORK_ROUND) \
108 _FP_FRAC_ADDI_##wc(X, _FP_WORK_ROUND); \
111 #define _FP_ROUND_ZERO(wc, X) (void)0
113 #define _FP_ROUND_PINF(wc, X) \
115 if (!X##_s && (_FP_FRAC_LOW_##wc(X) & 7)) \
116 _FP_FRAC_ADDI_##wc(X, _FP_WORK_LSB); \
119 #define _FP_ROUND_MINF(wc, X) \
121 if (X##_s && (_FP_FRAC_LOW_##wc(X) & 7)) \
122 _FP_FRAC_ADDI_##wc(X, _FP_WORK_LSB); \
125 #define _FP_ROUND(wc, X) \
127 if (_FP_FRAC_LOW_##wc(X) & 7) \
128 FP_SET_EXCEPTION(FP_EX_INEXACT); \
129 switch (FP_ROUNDMODE) \
131 case FP_RND_NEAREST: \
132 _FP_ROUND_NEAREST(wc,X); \
135 _FP_ROUND_ZERO(wc,X); \
138 _FP_ROUND_PINF(wc,X); \
141 _FP_ROUND_MINF(wc,X); \
146 #define FP_CLS_NORMAL 0
147 #define FP_CLS_ZERO 1
151 #define _FP_CLS_COMBINE(x,y) (((x) << 2) | (y))
157 #include "op-common.h"
159 /* Sigh. Silly things longlong.h needs. */
160 #define UWtype _FP_W_TYPE
161 #define W_TYPE_SIZE _FP_W_TYPE_SIZE
163 typedef int QItype
__attribute__((mode(QI
)));
164 typedef int SItype
__attribute__((mode(SI
)));
165 typedef int DItype
__attribute__((mode(DI
)));
166 typedef unsigned int UQItype
__attribute__((mode(QI
)));
167 typedef unsigned int USItype
__attribute__((mode(SI
)));
168 typedef unsigned int UDItype
__attribute__((mode(DI
)));
169 #if _FP_W_TYPE_SIZE == 32
170 typedef unsigned int UHWtype
__attribute__((mode(HI
)));
171 #elif _FP_W_TYPE_SIZE == 64
172 typedef USItype UHWtype
;
176 #include <stdlib/longlong.h>