Annotation of sys/arch/alpha/include/fpu.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: fpu.h,v 1.1 2002/04/28 20:55:14 pvalchev Exp $ */
2: /* $NetBSD: fpu.h,v 1.4 2001/04/26 03:10:46 ross Exp $ */
3:
4: /*-
5: * Copyright (c) 2001 Ross Harvey
6: * All rights reserved.
7: *
8: * This software was written for NetBSD.
9: *
10: * Redistribution and use in source and binary forms, with or without
11: * modification, are permitted provided that the following conditions
12: * are met:
13: * 1. Redistributions of source code must retain the above copyright
14: * notice, this list of conditions and the following disclaimer.
15: * 2. Redistributions in binary form must reproduce the above copyright
16: * notice, this list of conditions and the following disclaimer in the
17: * documentation and/or other materials provided with the distribution.
18: * 3. All advertising materials mentioning features or use of this software
19: * must display the following acknowledgement:
20: * This product includes software developed by the NetBSD
21: * Foundation, Inc. and its contributors.
22: * 4. Neither the name of The NetBSD Foundation nor the names of its
23: * contributors may be used to endorse or promote products derived
24: * from this software without specific prior written permission.
25: *
26: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36: * POSSIBILITY OF SUCH DAMAGE.
37: */
38:
39: #ifndef _ALPHA_FPU_H_
40: #define _ALPHA_FPU_H_
41:
42: #define _FP_C_DEF(n) (1UL << (n))
43:
44: /*
45: * Most of these next definitions were moved from <ieeefp.h>. Apparently the
46: * names happen to match those exported by Compaq and Linux from their fpu.h
47: * files.
48: */
49:
50: #define FPCR_SUM _FP_C_DEF(63)
51: #define FPCR_INED _FP_C_DEF(62)
52: #define FPCR_UNFD _FP_C_DEF(61)
53: #define FPCR_UNDZ _FP_C_DEF(60)
54: #define FPCR_DYN(rm) ((unsigned long)(rm) << 58)
55: #define FPCR_IOV _FP_C_DEF(57)
56: #define FPCR_INE _FP_C_DEF(56)
57: #define FPCR_UNF _FP_C_DEF(55)
58: #define FPCR_OVF _FP_C_DEF(54)
59: #define FPCR_DZE _FP_C_DEF(53)
60: #define FPCR_INV _FP_C_DEF(52)
61: #define FPCR_OVFD _FP_C_DEF(51)
62: #define FPCR_DZED _FP_C_DEF(50)
63: #define FPCR_INVD _FP_C_DEF(49)
64: #define FPCR_DNZ _FP_C_DEF(48)
65: #define FPCR_DNOD _FP_C_DEF(47)
66:
67: #define FPCR_MIRRORED (FPCR_INE | FPCR_UNF | FPCR_OVF | FPCR_DZE | FPCR_INV)
68: #define FPCR_MIR_START 52
69:
70: /*
71: * The AARM specifies the bit positions of the software word used for
72: * user mode interface to the control and status of the kernel completion
73: * routines. Although it largely just redefines the FPCR, it shuffles
74: * the bit order. The names of the bits are defined in the AARM, and
75: * the definition prefix can easily be determined from public domain
76: * programs written to either the Compaq or Linux interfaces, which
77: * appear to be identical.
78: */
79:
80: #define IEEE_STATUS_DNO _FP_C_DEF(22)
81: #define IEEE_STATUS_INE _FP_C_DEF(21)
82: #define IEEE_STATUS_UNF _FP_C_DEF(20)
83: #define IEEE_STATUS_OVF _FP_C_DEF(19)
84: #define IEEE_STATUS_DZE _FP_C_DEF(18)
85: #define IEEE_STATUS_INV _FP_C_DEF(17)
86:
87: #define IEEE_TRAP_ENABLE_DNO _FP_C_DEF(6)
88: #define IEEE_TRAP_ENABLE_INE _FP_C_DEF(5)
89: #define IEEE_TRAP_ENABLE_UNF _FP_C_DEF(4)
90: #define IEEE_TRAP_ENABLE_OVF _FP_C_DEF(3)
91: #define IEEE_TRAP_ENABLE_DZE _FP_C_DEF(2)
92: #define IEEE_TRAP_ENABLE_INV _FP_C_DEF(1)
93:
94: #define IEEE_INHERIT _FP_C_DEF(14)
95: #define IEEE_MAP_UMZ _FP_C_DEF(13)
96: #define IEEE_MAP_DMZ _FP_C_DEF(12)
97:
98: #define FP_C_MIRRORED (IEEE_STATUS_INE | IEEE_STATUS_UNF | IEEE_STATUS_OVF\
99: | IEEE_STATUS_DZE | IEEE_STATUS_INV)
100: #define FP_C_MIR_START 17
101:
102: #ifdef _KERNEL
103:
104: #define FLD_MASK(len) ((1UL << (len)) - 1)
105: #define FLD_CLEAR(obj, origin, len) \
106: ((obj) & ~(FLD_MASK(len) << (origin)))
107: #define FLD_INSERT(obj, origin, len, value) \
108: (FLD_CLEAR(obj, origin, len) | (value) << origin)
109:
110: #define FP_C_TO_OPENBSD_MASK(fp_c) ((fp_c) >> 1 & 0x3f)
111: #define FP_C_TO_OPENBSD_FLAG(fp_c) ((fp_c) >> 17 & 0x3f)
112: #define OPENBSD_MASK_TO_FP_C(m) (((m) & 0x3f) << 1)
113: #define OPENBSD_FLAG_TO_FP_C(s) (((s) & 0x3f) << 17)
114: #define CLEAR_FP_C_MASK(fp_c) ((fp_c) & ~(0x3f << 1))
115: #define CLEAR_FP_C_FLAG(fp_c) ((fp_c) & ~(0x3f << 17))
116: #define SET_FP_C_MASK(fp_c, m) (CLEAR_FP_C_MASK(fp_c) | OPENBSD_MASK_TO_FP_C(m))
117: #define SET_FP_C_FLAG(fp_c, m) (CLEAR_FP_C_FLAG(fp_c) | OPENBSD_FLAG_TO_FP_C(m))
118:
119: #endif
120:
121: #endif
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