2 * IEEE754 floating point
3 * common internal header file
6 * MIPS floating point support
7 * Copyright (C) 1994-2000 Algorithmics Ltd.
9 * ########################################################################
11 * This program is free software; you can distribute it and/or modify it
12 * under the terms of the GNU General Public License (Version 2) as
13 * published by the Free Software Foundation.
15 * This program is distributed in the hope it will be useful, but WITHOUT
16 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
17 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
20 * You should have received a copy of the GNU General Public License along
21 * with this program; if not, write to the Free Software Foundation, Inc.,
22 * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
24 * ########################################################################
26 #ifndef __IEEE754INT_H
27 #define __IEEE754INT_H
32 #define DP_EMIN (-1022)
37 #define SP_EMIN (-126)
41 #define DP_MBIT(x) ((u64)1 << (x))
42 #define DP_HIDDEN_BIT DP_MBIT(DP_MBITS)
43 #define DP_SIGN_BIT DP_MBIT(63)
45 #define SP_MBIT(x) ((u32)1 << (x))
46 #define SP_HIDDEN_BIT SP_MBIT(SP_MBITS)
47 #define SP_SIGN_BIT SP_MBIT(31)
50 #define SPSIGN(sp) (sp.parts.sign)
51 #define SPBEXP(sp) (sp.parts.bexp)
52 #define SPMANT(sp) (sp.parts.mant)
54 #define DPSIGN(dp) (dp.parts.sign)
55 #define DPBEXP(dp) (dp.parts.bexp)
56 #define DPMANT(dp) (dp.parts.mant)
58 #define CLPAIR(x, y) ((x)*6+(y))
60 static inline void ieee754_clearcx(void)
65 static inline void ieee754_setcx(const unsigned int flags)
67 ieee754_csr.cx |= flags;
68 ieee754_csr.sx |= flags;
71 static inline int ieee754_setandtestcx(const unsigned int x)
75 return ieee754_csr.mx & x;
78 static inline int ieee754_tstx(void)
80 return ieee754_csr.cx & ieee754_csr.mx;
84 unsigned xm; int xe; int xs __maybe_unused; int xc
87 unsigned ym; int ye; int ys; int yc
89 #define EXPLODESP(v, vc, vs, ve, vm) \
94 if (ve == SP_EMAX+1+SP_EBIAS) { \
96 vc = IEEE754_CLASS_INF; \
97 else if (vm & SP_MBIT(SP_MBITS-1)) \
98 vc = IEEE754_CLASS_SNAN; \
100 vc = IEEE754_CLASS_QNAN; \
101 } else if (ve == SP_EMIN-1+SP_EBIAS) { \
104 vc = IEEE754_CLASS_DNORM; \
106 vc = IEEE754_CLASS_ZERO; \
109 vm |= SP_HIDDEN_BIT; \
110 vc = IEEE754_CLASS_NORM; \
113 #define EXPLODEXSP EXPLODESP(x, xc, xs, xe, xm)
114 #define EXPLODEYSP EXPLODESP(y, yc, ys, ye, ym)
118 u64 xm; int xe; int xs __maybe_unused; int xc
121 u64 ym; int ye; int ys; int yc
123 #define EXPLODEDP(v, vc, vs, ve, vm) \
128 if (ve == DP_EMAX+1+DP_EBIAS) { \
130 vc = IEEE754_CLASS_INF; \
131 else if (vm & DP_MBIT(DP_MBITS-1)) \
132 vc = IEEE754_CLASS_SNAN; \
134 vc = IEEE754_CLASS_QNAN; \
135 } else if (ve == DP_EMIN-1+DP_EBIAS) { \
138 vc = IEEE754_CLASS_DNORM; \
140 vc = IEEE754_CLASS_ZERO; \
143 vm |= DP_HIDDEN_BIT; \
144 vc = IEEE754_CLASS_NORM; \
147 #define EXPLODEXDP EXPLODEDP(x, xc, xs, xe, xm)
148 #define EXPLODEYDP EXPLODEDP(y, yc, ys, ye, ym)
150 #define FLUSHDP(v, vc, vs, ve, vm) \
151 if (vc==IEEE754_CLASS_DNORM) { \
152 if (ieee754_csr.nod) { \
153 ieee754_setcx(IEEE754_INEXACT); \
154 vc = IEEE754_CLASS_ZERO; \
155 ve = DP_EMIN-1+DP_EBIAS; \
157 v = ieee754dp_zero(vs); \
161 #define FLUSHSP(v, vc, vs, ve, vm) \
162 if (vc==IEEE754_CLASS_DNORM) { \
163 if (ieee754_csr.nod) { \
164 ieee754_setcx(IEEE754_INEXACT); \
165 vc = IEEE754_CLASS_ZERO; \
166 ve = SP_EMIN-1+SP_EBIAS; \
168 v = ieee754sp_zero(vs); \
172 #define FLUSHXDP FLUSHDP(x, xc, xs, xe, xm)
173 #define FLUSHYDP FLUSHDP(y, yc, ys, ye, ym)
174 #define FLUSHXSP FLUSHSP(x, xc, xs, xe, xm)
175 #define FLUSHYSP FLUSHSP(y, yc, ys, ye, ym)
177 #endif /* __IEEE754INT_H */