Annotation of sys/arch/alpha/include/fpu.h, Revision 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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