1/* Machine-dependent software floating-point definitions.
2   Sparc64 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) 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_norm(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 << 1) - 1)
44#define _FP_NANFRAC_D		((_FP_QNANBIT_D << 1) - 1)
45#define _FP_NANFRAC_Q		((_FP_QNANBIT_Q << 1) - 1), -1
46#define _FP_NANSIGN_S		0
47#define _FP_NANSIGN_D		0
48#define _FP_NANSIGN_Q		0
49
50#define _FP_KEEPNANFRACP 1
51
52/* If one NaN is signaling and the other is not,
53 * we choose that one, otherwise we choose X.
54 */
55/* For _Qp_* and _Q_*, this should prefer X, for
56 * CPU instruction emulation this should prefer Y.
57 * (see SPAMv9 B.2.2 section).
58 */
59#define _FP_CHOOSENAN(fs, wc, R, X, Y, OP)			\
60  do {								\
61    if ((_FP_FRAC_HIGH_RAW_##fs(Y) & _FP_QNANBIT_##fs)		\
62	&& !(_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs))	\
63      {								\
64	R##_s = X##_s;						\
65	_FP_FRAC_COPY_##wc(R,X);				\
66      }								\
67    else							\
68      {								\
69	R##_s = Y##_s;						\
70	_FP_FRAC_COPY_##wc(R,Y);				\
71      }								\
72    R##_c = FP_CLS_NAN;						\
73  } while (0)
74
75/* Obtain the current rounding mode. */
76#ifndef FP_ROUNDMODE
77#define FP_ROUNDMODE	((current_thread_info()->xfsr[0] >> 30) & 0x3)
78#endif
79
80/* Exception flags. */
81#define FP_EX_INVALID		(1 << 4)
82#define FP_EX_OVERFLOW		(1 << 3)
83#define FP_EX_UNDERFLOW		(1 << 2)
84#define FP_EX_DIVZERO		(1 << 1)
85#define FP_EX_INEXACT		(1 << 0)
86
87#define FP_HANDLE_EXCEPTIONS return _fex
88
89#define FP_INHIBIT_RESULTS ((current_thread_info()->xfsr[0] >> 23) & _fex)
90
91#define FP_TRAPPING_EXCEPTIONS ((current_thread_info()->xfsr[0] >> 23) & 0x1f)
92
93#endif
94