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/* $OpenBSD: fdump.c,v 1.1 2018/08/21 18:35:18 bluhm Exp $ */
/*
* Copyright (c) 2018 Alexander Bluhm <bluhm@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <err.h>
#include <fenv.h>
#include <stdio.h>
#include <unistd.h>
int
main(int argc, char *argv[])
{
struct {
fenv_t fenv;
/* Try to read more and check env length. */
char pad[1];
} buf;
fenv_t *fenv = &buf.fenv;
ssize_t len;
size_t i;
len = read(0, &buf, sizeof(buf));
if (len < 0 )
err(1, "read");
if (len != sizeof(fenv_t))
errx(1, "read len %zd is not size %zu", len, sizeof(fenv_t));
printf("control\t%08x\n", fenv->__x87.__control);
printf("status\t%08x\n", fenv->__x87.__status);
printf("tag\t%08x\n", fenv->__x87.__tag);
for (i = 0; i < nitems(fenv->__x87.__others); i++) {
printf("others[%zu]\t%08x\n", i, fenv->__x87.__others[i]);
}
printf("mxcsr\t%08x\n", fenv->__mxcsr);
return 0;
}
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