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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* 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) \
David S. Miller92f28292006-07-27 16:49:21 -070037 _FP_MUL_MEAT_2_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
Linus Torvalds1da177e2005-04-16 15:20:36 -070038
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
David S. Miller40584962007-08-16 22:59:49 -070091#define FP_TRAPPING_EXCEPTIONS ((current_thread_info()->xfsr[0] >> 23) & 0x1f)
92
Linus Torvalds1da177e2005-04-16 15:20:36 -070093#endif