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1da177e4 LT |
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. | |
1da177e4 LT |
8 | * |
9 | * ######################################################################## | |
10 | * | |
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. | |
14 | * | |
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 | |
18 | * for more details. | |
19 | * | |
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. | |
23 | * | |
24 | * ######################################################################## | |
25 | */ | |
26 | ||
cae55066 | 27 | #include <linux/compiler.h> |
1da177e4 LT |
28 | |
29 | #include "ieee754int.h" | |
30 | ||
31 | #define assert(expr) ((void)0) | |
32 | ||
33 | /* 3bit extended double precision sticky right shift */ | |
34 | #define XDPSRS(v,rs) \ | |
ad8fb553 | 35 | ((rs > (DP_FBITS+3))?1:((v) >> (rs)) | ((v) << (64-(rs)) != 0)) |
1da177e4 LT |
36 | |
37 | #define XDPSRSX1() \ | |
47fa0c02 | 38 | (xe++, (xm = (xm >> 1) | (xm & 1))) |
1da177e4 LT |
39 | |
40 | #define XDPSRS1(v) \ | |
47fa0c02 | 41 | (((v) >> 1) | ((v) & 1)) |
1da177e4 LT |
42 | |
43 | /* convert denormal to normalized with extended exponent */ | |
44 | #define DPDNORMx(m,e) \ | |
ad8fb553 | 45 | while ((m >> DP_FBITS) == 0) { m <<= 1; e--; } |
21a151d8 RB |
46 | #define DPDNORMX DPDNORMx(xm, xe) |
47 | #define DPDNORMY DPDNORMx(ym, ye) | |
1da177e4 | 48 | |
2209bcb1 | 49 | static inline union ieee754dp builddp(int s, int bx, u64 m) |
1da177e4 | 50 | { |
2209bcb1 | 51 | union ieee754dp r; |
1da177e4 LT |
52 | |
53 | assert((s) == 0 || (s) == 1); | |
54 | assert((bx) >= DP_EMIN - 1 + DP_EBIAS | |
55 | && (bx) <= DP_EMAX + 1 + DP_EBIAS); | |
ad8fb553 | 56 | assert(((m) >> DP_FBITS) == 0); |
1da177e4 LT |
57 | |
58 | r.parts.sign = s; | |
59 | r.parts.bexp = bx; | |
60 | r.parts.mant = m; | |
61 | return r; | |
62 | } | |
63 | ||
2209bcb1 RB |
64 | extern int ieee754dp_isnan(union ieee754dp); |
65 | extern int ieee754dp_issnan(union ieee754dp); | |
cae55066 RB |
66 | extern int __cold ieee754si_xcpt(int, const char *, ...); |
67 | extern s64 __cold ieee754di_xcpt(s64, const char *, ...); | |
2209bcb1 RB |
68 | extern union ieee754dp __cold ieee754dp_xcpt(union ieee754dp, const char *, ...); |
69 | extern union ieee754dp __cold ieee754dp_nanxcpt(union ieee754dp, const char *, ...); | |
70 | extern union ieee754dp ieee754dp_bestnan(union ieee754dp, union ieee754dp); | |
71 | extern union ieee754dp ieee754dp_format(int, int, u64); | |
1da177e4 LT |
72 | |
73 | ||
47fa0c02 RB |
74 | #define DPNORMRET2(s, e, m, name, a0, a1) \ |
75 | { \ | |
76 | union ieee754dp V = ieee754dp_format(s, e, m); \ | |
9e8bad1f | 77 | if (ieee754_tstx()) \ |
47fa0c02 RB |
78 | return ieee754dp_xcpt(V, name, a0, a1); \ |
79 | else \ | |
80 | return V; \ | |
1da177e4 LT |
81 | } |
82 | ||
21a151d8 | 83 | #define DPNORMRET1(s, e, m, name, a0) DPNORMRET2(s, e, m, name, a0, a0) |