121 lines
4.6 KiB
C
121 lines
4.6 KiB
C
/* $NetBSD: fpu.h,v 1.4 2001/04/26 03:10:46 ross Exp $ */
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/*-
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* Copyright (c) 2001 Ross Harvey
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* All rights reserved.
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*
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* This software was written for NetBSD.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _ALPHA_FPU_H_
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#define _ALPHA_FPU_H_
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#define _FP_C_DEF(n) (1UL << (n))
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/*
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* Most of these next definitions were moved from <ieeefp.h>. Apparently the
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* names happen to match those exported by Compaq and Linux from their fpu.h
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* files.
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*/
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#define FPCR_SUM _FP_C_DEF(63)
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#define FPCR_INED _FP_C_DEF(62)
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#define FPCR_UNFD _FP_C_DEF(61)
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#define FPCR_UNDZ _FP_C_DEF(60)
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#define FPCR_DYN(rm) ((unsigned long)(rm) << 58)
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#define FPCR_IOV _FP_C_DEF(57)
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#define FPCR_INE _FP_C_DEF(56)
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#define FPCR_UNF _FP_C_DEF(55)
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#define FPCR_OVF _FP_C_DEF(54)
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#define FPCR_DZE _FP_C_DEF(53)
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#define FPCR_INV _FP_C_DEF(52)
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#define FPCR_OVFD _FP_C_DEF(51)
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#define FPCR_DZED _FP_C_DEF(50)
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#define FPCR_INVD _FP_C_DEF(49)
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#define FPCR_DNZ _FP_C_DEF(48)
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#define FPCR_DNOD _FP_C_DEF(47)
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#define FPCR_MIRRORED (FPCR_INE | FPCR_UNF | FPCR_OVF | FPCR_DZE | FPCR_INV)
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#define FPCR_MIR_START 52
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/*
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* The AARM specifies the bit positions of the software word used for
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* user mode interface to the control and status of the kernel completion
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* routines. Although it largely just redefines the FPCR, it shuffles
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* the bit order. The names of the bits are defined in the AARM, and
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* the definition prefix can easily be determined from public domain
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* programs written to either the Compaq or Linux interfaces, which
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* appear to be identical.
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*/
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#define IEEE_STATUS_DNO _FP_C_DEF(22)
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#define IEEE_STATUS_INE _FP_C_DEF(21)
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#define IEEE_STATUS_UNF _FP_C_DEF(20)
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#define IEEE_STATUS_OVF _FP_C_DEF(19)
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#define IEEE_STATUS_DZE _FP_C_DEF(18)
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#define IEEE_STATUS_INV _FP_C_DEF(17)
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#define IEEE_TRAP_ENABLE_DNO _FP_C_DEF(6)
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#define IEEE_TRAP_ENABLE_INE _FP_C_DEF(5)
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#define IEEE_TRAP_ENABLE_UNF _FP_C_DEF(4)
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#define IEEE_TRAP_ENABLE_OVF _FP_C_DEF(3)
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#define IEEE_TRAP_ENABLE_DZE _FP_C_DEF(2)
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#define IEEE_TRAP_ENABLE_INV _FP_C_DEF(1)
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#define IEEE_INHERIT _FP_C_DEF(14)
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#define IEEE_MAP_UMZ _FP_C_DEF(13)
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#define IEEE_MAP_DMZ _FP_C_DEF(12)
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#define FP_C_MIRRORED (IEEE_STATUS_INE | IEEE_STATUS_UNF | IEEE_STATUS_OVF\
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| IEEE_STATUS_DZE | IEEE_STATUS_INV)
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#define FP_C_MIR_START 17
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#ifdef _KERNEL
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#define FLD_MASK(len) ((1UL << (len)) - 1)
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#define FLD_CLEAR(obj, origin, len) \
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((obj) & ~(FLD_MASK(len) << (origin)))
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#define FLD_INSERT(obj, origin, len, value) \
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(FLD_CLEAR(obj, origin, len) | (value) << origin)
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#define FP_C_TO_NETBSD_MASK(fp_c) ((fp_c) >> 1 & 0x3f)
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#define FP_C_TO_NETBSD_FLAG(fp_c) ((fp_c) >> 17 & 0x3f)
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#define NETBSD_MASK_TO_FP_C(m) (((m) & 0x3f) << 1)
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#define NETBSD_FLAG_TO_FP_C(s) (((s) & 0x3f) << 17)
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#define CLEAR_FP_C_MASK(fp_c) ((fp_c) & ~(0x3f << 1))
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#define CLEAR_FP_C_FLAG(fp_c) ((fp_c) & ~(0x3f << 17))
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#define SET_FP_C_MASK(fp_c, m) (CLEAR_FP_C_MASK(fp_c) | NETBSD_MASK_TO_FP_C(m))
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#define SET_FP_C_FLAG(fp_c, m) (CLEAR_FP_C_FLAG(fp_c) | NETBSD_FLAG_TO_FP_C(m))
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#endif
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#endif
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