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authorTakashi YOSHII <takasi-y@ops.dti.ne.jp>2006-09-27 04:15:32 -0400
committerPaul Mundt <lethal@linux-sh.org>2006-09-27 04:15:32 -0400
commit4b565680d16300acab0ff167e24f0ea289a6bd5d (patch)
treed233188a29c0a0ccfdf72c84899e926df2fc2ba8 /include/asm-sh/sfp-machine.h
parent317a6104a99f87c0b35c0d9f19ec23ee7429b33e (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.h86
1 files changed, 86 insertions, 0 deletions
diff --git a/include/asm-sh/sfp-machine.h b/include/asm-sh/sfp-machine.h
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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