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.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.xfsr[0] >> 23) & _fex)
90
91 #endif
92
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