diff options
author | Takashi YOSHII <takasi-y@ops.dti.ne.jp> | 2006-09-27 04:15:32 -0400 |
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committer | Paul Mundt <lethal@linux-sh.org> | 2006-09-27 04:15:32 -0400 |
commit | 4b565680d16300acab0ff167e24f0ea289a6bd5d (patch) | |
tree | d233188a29c0a0ccfdf72c84899e926df2fc2ba8 /include/asm-sh/sfp-machine.h | |
parent | 317a6104a99f87c0b35c0d9f19ec23ee7429b33e (diff) |
sh: math-emu support
This implements initial math-emu support, aimed primarily at SH-3.
Signed-off-by: Takashi YOSHII <takasi-y@ops.dti.ne.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'include/asm-sh/sfp-machine.h')
-rw-r--r-- | include/asm-sh/sfp-machine.h | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/include/asm-sh/sfp-machine.h b/include/asm-sh/sfp-machine.h new file mode 100644 index 000000000000..8a6399a8cfe0 --- /dev/null +++ b/include/asm-sh/sfp-machine.h | |||
@@ -0,0 +1,86 @@ | |||
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 | |||