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
83