1 /* Machine-dependent software floating-point definitions.
2 Alpha 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 (jakub@redhat.com) 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(_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(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
44 #define _FP_NANFRAC_D _FP_QNANBIT_D
45 #define _FP_NANFRAC_Q _FP_QNANBIT_Q
46 #define _FP_NANSIGN_S 1
47 #define _FP_NANSIGN_D 1
48 #define _FP_NANSIGN_Q 1
49
50 #define _FP_KEEPNANFRACP 1
51
52 /* Alpha Architecture Handbook, 4.7.10.4 sais that
53 * we should prefer any type of NaN in Fb, then Fa.
54 */
55 #define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \
56 do { \
57 R##_s = Y##_s; \
58 _FP_FRAC_COPY_##wc(R,X); \
59 R##_c = FP_CLS_NAN; \
60 } while (0)
61
62 /* Obtain the current rounding mode. */
63 #define FP_ROUNDMODE mode
64 #define FP_RND_NEAREST (FPCR_DYN_NORMAL >> FPCR_DYN_SHIFT)
65 #define FP_RND_ZERO (FPCR_DYN_CHOPPED >> FPCR_DYN_SHIFT)
66 #define FP_RND_PINF (FPCR_DYN_PLUS >> FPCR_DYN_SHIFT)
67 #define FP_RND_MINF (FPCR_DYN_MINUS >> FPCR_DYN_SHIFT)
68
69 /* Exception flags. */
70 #define FP_EX_INVALID IEEE_TRAP_ENABLE_INV
71 #define FP_EX_OVERFLOW IEEE_TRAP_ENABLE_OVF
72 #define FP_EX_UNDERFLOW IEEE_TRAP_ENABLE_UNF
73 #define FP_EX_DIVZERO IEEE_TRAP_ENABLE_DZE
74 #define FP_EX_INEXACT IEEE_TRAP_ENABLE_INE
75 #define FP_EX_DENORM IEEE_TRAP_ENABLE_DNO
76
77 #define FP_DENORM_ZERO (swcr & IEEE_MAP_DMZ)
78
79 /* We write the results always */
80 #define FP_INHIBIT_RESULTS 0
81
82 #endif