aboutsummaryrefslogtreecommitdiffstats
path: root/arch/s390/include/asm/sfp-machine.h
blob: 4e16aede4b0622b24e9660aecd5405ff5bba55fb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
/* Machine-dependent software floating-point definitions.
   S/390 kernel version.
   Copyright (C) 1997,1998,1999 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Richard Henderson (rth@cygnus.com),
		  Jakub Jelinek (jj@ultra.linux.cz),
		  David S. Miller (davem@redhat.com) and
		  Peter Maydell (pmaydell@chiark.greenend.org.uk).

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public License as
   published by the Free Software Foundation; either version 2 of the
   License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If
   not, write to the Free Software Foundation, Inc.,
   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

#ifndef _SFP_MACHINE_H
#define _SFP_MACHINE_H
   

#define _FP_W_TYPE_SIZE		32
#define _FP_W_TYPE		unsigned int
#define _FP_WS_TYPE		signed int
#define _FP_I_TYPE		int

#define _FP_MUL_MEAT_S(R,X,Y)					\
  _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_S,R,X,Y,umul_ppmm)
#define _FP_MUL_MEAT_D(R,X,Y)					\
  _FP_MUL_MEAT_2_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
#define _FP_MUL_MEAT_Q(R,X,Y)					\
  _FP_MUL_MEAT_4_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)

#define _FP_DIV_MEAT_S(R,X,Y)	_FP_DIV_MEAT_1_udiv(S,R,X,Y)
#define _FP_DIV_MEAT_D(R,X,Y)	_FP_DIV_MEAT_2_udiv(D,R,X,Y)
#define _FP_DIV_MEAT_Q(R,X,Y)	_FP_DIV_MEAT_4_udiv(Q,R,X,Y)

#define _FP_NANFRAC_S		((_FP_QNANBIT_S << 1) - 1)
#define _FP_NANFRAC_D		((_FP_QNANBIT_D << 1) - 1), -1
#define _FP_NANFRAC_Q		((_FP_QNANBIT_Q << 1) - 1), -1, -1, -1
#define _FP_NANSIGN_S		0
#define _FP_NANSIGN_D		0
#define _FP_NANSIGN_Q		0

#define _FP_KEEPNANFRACP 1

/*
 * If one NaN is signaling and the other is not,
 * we choose that one, otherwise we choose X.
 */
#define _FP_CHOOSENAN(fs, wc, R, X, Y, OP)                      \
  do {                                                          \
    if ((_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs)          \
        && !(_FP_FRAC_HIGH_RAW_##fs(Y) & _FP_QNANBIT_##fs))     \
      {                                                         \
        R##_s = Y##_s;                                          \
        _FP_FRAC_COPY_##wc(R,Y);                                \
      }                                                         \
    else                                                        \
      {                                                         \
        R##_s = X##_s;                                          \
        _FP_FRAC_COPY_##wc(R,X);                                \
      }                                                         \
    R##_c = FP_CLS_NAN;                                         \
  } while (0)

/* Some assembly to speed things up. */
#define __FP_FRAC_ADD_3(r2,r1,r0,x2,x1,x0,y2,y1,y0) ({		\
	unsigned int __r2 = (x2) + (y2);			\
	unsigned int __r1 = (x1);				\
	unsigned int __r0 = (x0);				\
	asm volatile(						\
		"	alr	%2,%3\n"			\
		"	brc	12,0f\n"			\
		"	lhi	0,1\n"				\
		"	alr	%1,0\n"				\
		"	brc	12,0f\n"			\
		"	alr	%0,0\n"				\
		"0:"						\
		: "+&d" (__r2), "+&d" (__r1), "+&d" (__r0)	\
		: "d" (y0), "i" (1) : "cc", "0" );		\
	asm volatile(						\
		"	alr	%1,%2\n"			\
		"	brc	12,0f\n"			\
		"	ahi	%0,1\n"				\
		"0:"						\
		: "+&d" (__r2), "+&d" (__r1)			\
		: "d" (y1) : "cc");				\
	(r2) = __r2;						\
	(r1) = __r1;						\
	(r0) = __r0;						\
})

#define __FP_FRAC_SUB_3(r2,r1,r0,x2,x1,x0,y2,y1,y0) ({		\
	unsigned int __r2 = (x2) - (y2);			\
	unsigned int __r1 = (x1);				\
	unsigned int __r0 = (x0);				\
	asm volatile(						\
		"	slr   %2,%3\n"				\
		"	brc	3,0f\n"				\
		"	lhi	0,1\n"				\
		"	slr	%1,0\n"				\
		"	brc	3,0f\n"				\
		"	slr	%0,0\n"				\
		"0:"						\
		: "+&d" (__r2), "+&d" (__r1), "+&d" (__r0)	\
		: "d" (y0) : "cc", "0");			\
	asm volatile(						\
		"	slr	%1,%2\n"			\
		"	brc	3,0f\n"				\
		"	ahi	%0,-1\n"			\
		"0:"						\
		: "+&d" (__r2), "+&d" (__r1)			\
		: "d" (y1) : "cc");				\
	(r2) = __r2;						\
	(r1) = __r1;						\
	(r0) = __r0;						\
})

#define __FP_FRAC_DEC_3(x2,x1,x0,y2,y1,y0) __FP_FRAC_SUB_3(x2,x1,x0,x2,x1,x0,y2,y1,y0)

/* Obtain the current rounding mode. */
#define FP_ROUNDMODE	mode

/* Exception flags. */
#define FP_EX_INVALID		0x800000
#define FP_EX_DIVZERO		0x400000
#define FP_EX_OVERFLOW		0x200000
#define FP_EX_UNDERFLOW		0x100000
#define FP_EX_INEXACT		0x080000

/* We write the results always */
#define FP_INHIBIT_RESULTS 0

#endif