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/* $OpenBSD: fpu.h,v 1.2 2011/03/23 16:54:34 pirofti Exp $ */
/* $NetBSD: fpu.h,v 1.4 2001/04/26 03:10:46 ross Exp $ */
/*-
* Copyright (c) 2001 Ross Harvey
* All rights reserved.
*
* This software was written for NetBSD.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _MACHINE_FPU_H_
#define _MACHINE_FPU_H_
#define _FP_C_DEF(n) (1UL << (n))
/*
* Most of these next definitions were moved from <ieeefp.h>. Apparently the
* names happen to match those exported by Compaq and Linux from their fpu.h
* files.
*/
#define FPCR_SUM _FP_C_DEF(63)
#define FPCR_INED _FP_C_DEF(62)
#define FPCR_UNFD _FP_C_DEF(61)
#define FPCR_UNDZ _FP_C_DEF(60)
#define FPCR_DYN(rm) ((unsigned long)(rm) << 58)
#define FPCR_IOV _FP_C_DEF(57)
#define FPCR_INE _FP_C_DEF(56)
#define FPCR_UNF _FP_C_DEF(55)
#define FPCR_OVF _FP_C_DEF(54)
#define FPCR_DZE _FP_C_DEF(53)
#define FPCR_INV _FP_C_DEF(52)
#define FPCR_OVFD _FP_C_DEF(51)
#define FPCR_DZED _FP_C_DEF(50)
#define FPCR_INVD _FP_C_DEF(49)
#define FPCR_DNZ _FP_C_DEF(48)
#define FPCR_DNOD _FP_C_DEF(47)
#define FPCR_MIRRORED (FPCR_INE | FPCR_UNF | FPCR_OVF | FPCR_DZE | FPCR_INV)
#define FPCR_MIR_START 52
/*
* The AARM specifies the bit positions of the software word used for
* user mode interface to the control and status of the kernel completion
* routines. Although it largely just redefines the FPCR, it shuffles
* the bit order. The names of the bits are defined in the AARM, and
* the definition prefix can easily be determined from public domain
* programs written to either the Compaq or Linux interfaces, which
* appear to be identical.
*/
#define IEEE_STATUS_DNO _FP_C_DEF(22)
#define IEEE_STATUS_INE _FP_C_DEF(21)
#define IEEE_STATUS_UNF _FP_C_DEF(20)
#define IEEE_STATUS_OVF _FP_C_DEF(19)
#define IEEE_STATUS_DZE _FP_C_DEF(18)
#define IEEE_STATUS_INV _FP_C_DEF(17)
#define IEEE_TRAP_ENABLE_DNO _FP_C_DEF(6)
#define IEEE_TRAP_ENABLE_INE _FP_C_DEF(5)
#define IEEE_TRAP_ENABLE_UNF _FP_C_DEF(4)
#define IEEE_TRAP_ENABLE_OVF _FP_C_DEF(3)
#define IEEE_TRAP_ENABLE_DZE _FP_C_DEF(2)
#define IEEE_TRAP_ENABLE_INV _FP_C_DEF(1)
#define IEEE_INHERIT _FP_C_DEF(14)
#define IEEE_MAP_UMZ _FP_C_DEF(13)
#define IEEE_MAP_DMZ _FP_C_DEF(12)
#define FP_C_MIRRORED (IEEE_STATUS_INE | IEEE_STATUS_UNF | IEEE_STATUS_OVF\
| IEEE_STATUS_DZE | IEEE_STATUS_INV)
#define FP_C_MIR_START 17
#ifdef _KERNEL
#define FLD_MASK(len) ((1UL << (len)) - 1)
#define FLD_CLEAR(obj, origin, len) \
((obj) & ~(FLD_MASK(len) << (origin)))
#define FLD_INSERT(obj, origin, len, value) \
(FLD_CLEAR(obj, origin, len) | (value) << origin)
#define FP_C_TO_OPENBSD_MASK(fp_c) ((fp_c) >> 1 & 0x3f)
#define FP_C_TO_OPENBSD_FLAG(fp_c) ((fp_c) >> 17 & 0x3f)
#define OPENBSD_MASK_TO_FP_C(m) (((m) & 0x3f) << 1)
#define OPENBSD_FLAG_TO_FP_C(s) (((s) & 0x3f) << 17)
#define CLEAR_FP_C_MASK(fp_c) ((fp_c) & ~(0x3f << 1))
#define CLEAR_FP_C_FLAG(fp_c) ((fp_c) & ~(0x3f << 17))
#define SET_FP_C_MASK(fp_c, m) (CLEAR_FP_C_MASK(fp_c) | OPENBSD_MASK_TO_FP_C(m))
#define SET_FP_C_FLAG(fp_c, m) (CLEAR_FP_C_FLAG(fp_c) | OPENBSD_FLAG_TO_FP_C(m))
#endif
#endif
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