2fe8fb192f
There is important information about booting non-ack images in docs/UPDATING. ack/aout-format images can't be built any more, and booting clang/ELF-format ones is a little different. Updating to the new boot monitor is recommended. Changes in this commit: . drop boot monitor -> allowing dropping ack support . facility to copy ELF boot files to /boot so that old boot monitor can still boot fairly easily, see UPDATING . no more ack-format libraries -> single-case libraries . some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases . drop several ack toolchain commands, but not all support commands (e.g. aal is gone but acksize is not yet). . a few libc files moved to netbsd libc dir . new /bin/date as minix date used code in libc/ . test compile fix . harmonize includes . /usr/lib is no longer special: without ack, /usr/lib plays no kind of special bootstrapping role any more and bootstrapping is done exclusively through packages, so releases depend even less on the state of the machine making them now. . rename nbsd_lib* to lib* . reduce mtree
118 lines
3.9 KiB
C
118 lines
3.9 KiB
C
/* $NetBSD: ieee.h,v 1.11 2010/09/15 16:11:28 christos Exp $ */
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/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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*
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* 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 University of
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* California, Lawrence Berkeley Laboratory.
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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. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)ieee.h 8.1 (Berkeley) 6/11/93
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*/
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/*
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* ieee.h defines the machine-dependent layout of the machine's IEEE
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* floating point. It does *not* define (yet?) any of the rounding
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* mode bits, exceptions, and so forth.
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*/
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#include <sys/ieee754.h>
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#define EXT_EXPBITS 15
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#define EXT_FRACHBITS 32
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#define EXT_FRACLBITS 32
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#define EXT_FRACBITS (EXT_FRACLBITS + EXT_FRACHBITS)
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#define EXT_TO_ARRAY32(u, a) do { \
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(a)[0] = (uint32_t)(u).extu_ext.ext_fracl; \
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(a)[1] = (uint32_t)(u).extu_ext.ext_frach; \
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} while(/*CONSTCOND*/0)
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/*
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* struct ieee_ext is the raw storage layout of the 80-bit
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* extended-precision type as implemented by the FPU. Per the
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* respective ABI specifications, it is followed by a tail padding of
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*
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* amd64: 48 bits,
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* i386: 16 bits.
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*/
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struct ieee_ext {
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u_int ext_fracl:EXT_FRACLBITS;
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u_int ext_frach:EXT_FRACHBITS;
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#if 0
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u_int ext_int:1;
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#endif
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u_int ext_exp:EXT_EXPBITS;
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u_int ext_sign:1;
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};
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/*
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* Floats whose exponent is in [1..INFNAN) (of whatever type) are
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* `normal'. Floats whose exponent is INFNAN are either Inf or NaN.
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* Floats whose exponent is zero are either zero (iff all fraction
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* bits are zero) or subnormal values.
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*
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* A NaN is a `signalling NaN' if its QUIETNAN bit is clear in its
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* high fraction; if the bit is set, it is a `quiet NaN'.
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*/
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#define EXT_EXP_INFNAN 0x7fff
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#define EXT_EXP_INF 0x7fff
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#define EXT_EXP_NAN 0x7fff
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#if 0
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#define SNG_QUIETNAN (1 << 22)
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#define DBL_QUIETNAN (1 << 19)
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#define EXT_QUIETNAN (1 << 30)
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#endif
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/*
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* Exponent biases.
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*/
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#define EXT_EXP_BIAS 16383
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/*
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* Convenience data structures.
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*/
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union ieee_ext_u {
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long double extu_ld;
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struct ieee_ext extu_ext;
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};
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#define extu_exp extu_ext.ext_exp
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#define extu_sign extu_ext.ext_sign
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#define extu_fracl extu_ext.ext_fracl
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#define extu_frach extu_ext.ext_frach
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#define LDBL_NBIT 0x80000000
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#define mask_nbit_l(u) ((u).extu_frach &= ~LDBL_NBIT)
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