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
113 lines
3.4 KiB
C
113 lines
3.4 KiB
C
/* $NetBSD: qnan.c,v 1.2 2006/01/25 15:27:42 kleink Exp $ */
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/****************************************************************
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The author of this software is David M. Gay.
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Copyright (C) 2005 by David M. Gay
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that the copyright notice and this permission notice and warranty
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disclaimer appear in supporting documentation, and that the name of
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the author or any of his current or former employers not be used in
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advertising or publicity pertaining to distribution of the software
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without specific, written prior permission.
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THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN
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NO EVENT SHALL THE AUTHOR OR ANY OF HIS CURRENT OR FORMER EMPLOYERS BE
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LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY
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DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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SOFTWARE.
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****************************************************************/
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/* Please send bug reports to David M. Gay (dmg at acm dot org,
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* with " at " changed at "@" and " dot " changed to "."). */
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/* Program to compute quiet NaNs of various precisions (float, */
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/* double, and perhaps long double) on the current system, */
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/* provided the system uses binary IEEE (P754) arithmetic. */
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/* Note that one system's quiet NaN may be a signaling NaN on */
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/* another system. The IEEE arithmetic standards (P754, P854) */
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/* do not specify how to distinguish signaling NaNs from quiet */
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/* ones, and this detail varies across systems. The computed */
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/* NaN values are encoded in #defines for values for an */
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/* unsigned 32-bit integer type, called Ulong below, and */
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/* (for long double) perhaps as unsigned short values. Once */
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/* upon a time, there were PC compilers for Intel CPUs that */
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/* had sizeof(long double) = 10. Are such compilers still */
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/* distributed? */
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#include <stdio.h>
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#include "arith.h"
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#ifndef Long
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#define Long long
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#endif
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typedef unsigned Long Ulong;
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#undef HAVE_IEEE
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#ifdef IEEE_LITTLE_ENDIAN
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#define _0 1
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#define _1 0
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#define HAVE_IEEE
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#endif
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#ifdef IEEE_BIG_ENDIAN
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#define _0 0
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#define _1 1
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#define HAVE_IEEE
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#endif
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#define UL (unsigned long)
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int
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main(void)
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{
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#ifdef HAVE_IEEE
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typedef union {
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float f;
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double d;
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Ulong L[4];
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#ifndef NO_LONG_LONG
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unsigned short u[5];
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long double D;
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#endif
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} U;
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U a, b, c;
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int i;
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a.L[0] = b.L[0] = 0x7f800000;
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c.f = a.f - b.f;
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printf("#define f_QNAN 0x%lx\n", UL c.L[0]);
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a.L[_0] = b.L[_0] = 0x7ff00000;
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a.L[_1] = b.L[_1] = 0;
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c.d = a.d - b.d; /* quiet NaN */
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printf("#define d_QNAN0 0x%lx\n", UL c.L[0]);
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printf("#define d_QNAN1 0x%lx\n", UL c.L[1]);
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#ifdef NO_LONG_LONG
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for(i = 0; i < 4; i++)
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printf("#define ld_QNAN%d 0xffffffff\n", i);
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for(i = 0; i < 5; i++)
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printf("#define ldus_QNAN%d 0xffff\n", i);
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#else
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b.D = c.D = a.d;
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if (printf("") < 0)
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c.D = 37; /* never executed; just defeat optimization */
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a.L[2] = a.L[3] = 0;
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a.D = b.D - c.D;
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for(i = 0; i < 4; i++)
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printf("#define ld_QNAN%d 0x%lx\n", i, UL a.L[i]);
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for(i = 0; i < 5; i++)
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printf("#define ldus_QNAN%d 0x%x\n", i, a.u[i]);
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#endif
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#endif /* HAVE_IEEE */
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return 0;
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}
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