PageRenderTime 27ms CodeModel.GetById 21ms app.highlight 2ms RepoModel.GetById 2ms app.codeStats 0ms

/arch/alpha/include/asm/sfp-machine.h

http://github.com/mirrors/linux
C Header | 82 lines | 42 code | 12 blank | 28 comment | 1 complexity | 8f463a547674f443239d173eb58ff805 MD5 | raw file
 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