Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux...
[linux-2.6] / include / asm-alpha / sfp-machine.h
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