diff options
Diffstat (limited to 'lib/libc/ia64/gen/fpsetround.c')
-rw-r--r-- | lib/libc/ia64/gen/fpsetround.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/lib/libc/ia64/gen/fpsetround.c b/lib/libc/ia64/gen/fpsetround.c new file mode 100644 index 0000000..db2eef1 --- /dev/null +++ b/lib/libc/ia64/gen/fpsetround.c @@ -0,0 +1,43 @@ +/* + * Copyright (c) 2003 Marcel Moolenaar + * All rights reserved. + * + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. + * + * $FreeBSD$ + */ + +#include <sys/types.h> +#include <ieeefp.h> + +fp_rnd_t +fpsetround(fp_rnd_t rnd) +{ + uint64_t fpsr; + fp_rnd_t prev; + + __asm __volatile("mov %0=ar.fpsr" : "=r"(fpsr)); + prev = (fp_rnd_t)((fpsr >> 10) & 3); + fpsr = (fpsr & ~0xC00ULL) | ((unsigned int)rnd << 10); + __asm __volatile("mov ar.fpsr=%0" :: "r"(fpsr)); + return (prev); +} |