sh: math-emu support
[linux-2.6.git] / include / asm-sh / sfp-machine.h
1 /* Machine-dependent software floating-point definitions.
2    SuperH 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),
7                   David S. Miller (davem@redhat.com) and
8                   Peter Maydell (pmaydell@chiark.greenend.org.uk).
9
10    The GNU C Library is free software; you can redistribute it and/or
11    modify it under the terms of the GNU Library General Public License as
12    published by the Free Software Foundation; either version 2 of the
13    License, or (at your option) any later version.
14
15    The GNU C Library is distributed in the hope that it will be useful,
16    but WITHOUT ANY WARRANTY; without even the implied warranty of
17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
18    Library General Public License for more details.
19
20    You should have received a copy of the GNU Library General Public
21    License along with the GNU C Library; see the file COPYING.LIB.  If
22    not, write to the Free Software Foundation, Inc.,
23    59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
24
25 #ifndef _SFP_MACHINE_H
26 #define _SFP_MACHINE_H
27
28 #include <linux/config.h>
29
30 #define _FP_W_TYPE_SIZE         32
31 #define _FP_W_TYPE              unsigned long
32 #define _FP_WS_TYPE             signed long
33 #define _FP_I_TYPE              long
34
35 #define _FP_MUL_MEAT_S(R,X,Y)                                   \
36   _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_S,R,X,Y,umul_ppmm)
37 #define _FP_MUL_MEAT_D(R,X,Y)                                   \
38   _FP_MUL_MEAT_2_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
39 #define _FP_MUL_MEAT_Q(R,X,Y)                                   \
40   _FP_MUL_MEAT_4_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
41
42 #define _FP_DIV_MEAT_S(R,X,Y)   _FP_DIV_MEAT_1_udiv(S,R,X,Y)
43 #define _FP_DIV_MEAT_D(R,X,Y)   _FP_DIV_MEAT_2_udiv(D,R,X,Y)
44 #define _FP_DIV_MEAT_Q(R,X,Y)   _FP_DIV_MEAT_4_udiv(Q,R,X,Y)
45
46 #define _FP_NANFRAC_S           ((_FP_QNANBIT_S << 1) - 1)
47 #define _FP_NANFRAC_D           ((_FP_QNANBIT_D << 1) - 1), -1
48 #define _FP_NANFRAC_Q           ((_FP_QNANBIT_Q << 1) - 1), -1, -1, -1
49 #define _FP_NANSIGN_S           0
50 #define _FP_NANSIGN_D           0
51 #define _FP_NANSIGN_Q           0
52
53 #define _FP_KEEPNANFRACP 1
54
55 /*
56  * If one NaN is signaling and the other is not,
57  * we choose that one, otherwise we choose X.
58  */
59 #define _FP_CHOOSENAN(fs, wc, R, X, Y, OP)                      \
60   do {                                                          \
61     if ((_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs)          \
62         && !(_FP_FRAC_HIGH_RAW_##fs(Y) & _FP_QNANBIT_##fs))     \
63       {                                                         \
64         R##_s = Y##_s;                                          \
65         _FP_FRAC_COPY_##wc(R,Y);                                \
66       }                                                         \
67     else                                                        \
68       {                                                         \
69         R##_s = X##_s;                                          \
70         _FP_FRAC_COPY_##wc(R,X);                                \
71       }                                                         \
72     R##_c = FP_CLS_NAN;                                         \
73   } while (0)
74
75 //#define FP_ROUNDMODE          FPSCR_RM
76 #define FP_DENORM_ZERO          1/*FPSCR_DN*/
77
78 /* Exception flags. */
79 #define FP_EX_INVALID           (1<<4)
80 #define FP_EX_DIVZERO           (1<<3)
81 #define FP_EX_OVERFLOW          (1<<2)
82 #define FP_EX_UNDERFLOW         (1<<1)
83 #define FP_EX_INEXACT           (1<<0)
84
85 #endif
86