1/*
2 * IEEE754 floating point
3 * double precision internal header file
4 */
5/*
6 * MIPS floating point support
7 * Copyright (C) 1994-2000 Algorithmics Ltd.  All rights reserved.
8 * http://www.algor.co.uk
9 *
10 * ########################################################################
11 *
12 *  This program is free software; you can distribute it and/or modify it
13 *  under the terms of the GNU General Public License (Version 2) as
14 *  published by the Free Software Foundation.
15 *
16 *  This program is distributed in the hope it will be useful, but WITHOUT
17 *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
18 *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
19 *  for more details.
20 *
21 *  You should have received a copy of the GNU General Public License along
22 *  with this program; if not, write to the Free Software Foundation, Inc.,
23 *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
24 *
25 * ########################################################################
26 */
27
28
29#include "ieee754int.h"
30
31#define assert(expr) ((void)0)
32
33/* 3bit extended single precision sticky right shift */
34#define SPXSRSXn(rs) \
35  (xe += rs, \
36   xm = (rs > (SP_MBITS+3))?1:((xm) >> (rs)) | ((xm) << (32-(rs)) != 0))
37
38#define SPXSRSX1() \
39  (xe++, (xm = (xm >> 1) | (xm & 1)))
40
41#define SPXSRSYn(rs) \
42   (ye+=rs, \
43    ym = (rs > (SP_MBITS+3))?1:((ym) >> (rs)) | ((ym) << (32-(rs)) != 0))
44
45#define SPXSRSY1() \
46   (ye++, (ym = (ym >> 1) | (ym & 1)))
47
48/* convert denormal to normalized with extended exponent */
49#define SPDNORMx(m,e) \
50  while( (m >> SP_MBITS) == 0) { m <<= 1; e--; }
51#define SPDNORMX	SPDNORMx(xm,xe)
52#define SPDNORMY	SPDNORMx(ym,ye)
53
54static __inline ieee754sp buildsp(int s, int bx, unsigned m)
55{
56	ieee754sp r;
57
58	assert((s) == 0 || (s) == 1);
59	assert((bx) >= SP_EMIN - 1 + SP_EBIAS
60	       && (bx) <= SP_EMAX + 1 + SP_EBIAS);
61	assert(((m) >> SP_MBITS) == 0);
62
63	r.parts.sign = s;
64	r.parts.bexp = bx;
65	r.parts.mant = m;
66
67	return r;
68}
69
70extern int ieee754sp_isnan(ieee754sp);
71extern int ieee754sp_issnan(ieee754sp);
72extern int ieee754si_xcpt(int, const char *, ...);
73extern s64 ieee754di_xcpt(s64, const char *, ...);
74extern ieee754sp ieee754sp_xcpt(ieee754sp, const char *, ...);
75extern ieee754sp ieee754sp_nanxcpt(ieee754sp, const char *, ...);
76extern ieee754sp ieee754sp_bestnan(ieee754sp, ieee754sp);
77extern ieee754sp ieee754sp_format(int, int, unsigned);
78
79
80#define SPNORMRET2(s,e,m,name,a0,a1) \
81{ \
82    ieee754sp V = ieee754sp_format(s,e,m); \
83    if(TSTX()) \
84      return ieee754sp_xcpt(V,name,a0,a1); \
85    else \
86      return V; \
87}
88
89#define SPNORMRET1(s,e,m,name,a0)  SPNORMRET2(s,e,m,name,a0,a0)
90