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1 | /* Machine-dependent software floating-point definitions. |
2 | Sparc64 kernel version. | |
3 | Copyright (C) 1997,1998,1999 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) and | |
7 | David S. Miller (davem@redhat.com). | |
8 | ||
9 | The GNU C Library is free software; you can redistribute it and/or | |
10 | modify it under the terms of the GNU Library General Public License as | |
11 | published by the Free Software Foundation; either version 2 of the | |
12 | License, or (at your option) any later version. | |
13 | ||
14 | The GNU C Library is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | Library General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU Library General Public | |
20 | License along with the GNU C Library; see the file COPYING.LIB. If | |
21 | not, write to the Free Software Foundation, Inc., | |
22 | 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
23 | ||
24 | #ifndef _SFP_MACHINE_H | |
25 | #define _SFP_MACHINE_H | |
26 | ||
27 | #define _FP_W_TYPE_SIZE 64 | |
28 | #define _FP_W_TYPE unsigned long | |
29 | #define _FP_WS_TYPE signed long | |
30 | #define _FP_I_TYPE long | |
31 | ||
32 | #define _FP_MUL_MEAT_S(R,X,Y) \ | |
33 | _FP_MUL_MEAT_1_imm(_FP_WFRACBITS_S,R,X,Y) | |
34 | #define _FP_MUL_MEAT_D(R,X,Y) \ | |
35 | _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm) | |
36 | #define _FP_MUL_MEAT_Q(R,X,Y) \ | |
37 | _FP_MUL_MEAT_2_wide_3mul(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm) | |
38 | ||
39 | #define _FP_DIV_MEAT_S(R,X,Y) _FP_DIV_MEAT_1_imm(S,R,X,Y,_FP_DIV_HELP_imm) | |
40 | #define _FP_DIV_MEAT_D(R,X,Y) _FP_DIV_MEAT_1_udiv_norm(D,R,X,Y) | |
41 | #define _FP_DIV_MEAT_Q(R,X,Y) _FP_DIV_MEAT_2_udiv(Q,R,X,Y) | |
42 | ||
43 | #define _FP_NANFRAC_S ((_FP_QNANBIT_S << 1) - 1) | |
44 | #define _FP_NANFRAC_D ((_FP_QNANBIT_D << 1) - 1) | |
45 | #define _FP_NANFRAC_Q ((_FP_QNANBIT_Q << 1) - 1), -1 | |
46 | #define _FP_NANSIGN_S 0 | |
47 | #define _FP_NANSIGN_D 0 | |
48 | #define _FP_NANSIGN_Q 0 | |
49 | ||
50 | #define _FP_KEEPNANFRACP 1 | |
51 | ||
52 | /* If one NaN is signaling and the other is not, | |
53 | * we choose that one, otherwise we choose X. | |
54 | */ | |
55 | /* For _Qp_* and _Q_*, this should prefer X, for | |
56 | * CPU instruction emulation this should prefer Y. | |
57 | * (see SPAMv9 B.2.2 section). | |
58 | */ | |
59 | #define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \ | |
60 | do { \ | |
61 | if ((_FP_FRAC_HIGH_RAW_##fs(Y) & _FP_QNANBIT_##fs) \ | |
62 | && !(_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs)) \ | |
63 | { \ | |
64 | R##_s = X##_s; \ | |
65 | _FP_FRAC_COPY_##wc(R,X); \ | |
66 | } \ | |
67 | else \ | |
68 | { \ | |
69 | R##_s = Y##_s; \ | |
70 | _FP_FRAC_COPY_##wc(R,Y); \ | |
71 | } \ | |
72 | R##_c = FP_CLS_NAN; \ | |
73 | } while (0) | |
74 | ||
75 | /* Obtain the current rounding mode. */ | |
76 | #ifndef FP_ROUNDMODE | |
77 | #define FP_ROUNDMODE ((current_thread_info()->xfsr[0] >> 30) & 0x3) | |
78 | #endif | |
79 | ||
80 | /* Exception flags. */ | |
81 | #define FP_EX_INVALID (1 << 4) | |
82 | #define FP_EX_OVERFLOW (1 << 3) | |
83 | #define FP_EX_UNDERFLOW (1 << 2) | |
84 | #define FP_EX_DIVZERO (1 << 1) | |
85 | #define FP_EX_INEXACT (1 << 0) | |
86 | ||
87 | #define FP_HANDLE_EXCEPTIONS return _fex | |
88 | ||
89 | #define FP_INHIBIT_RESULTS ((current_thread_info()->xfsr[0] >> 23) & _fex) | |
90 | ||
91 | #endif |