minix/lib/libc/arch/hppa/gen/fpsetround.c

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/* $NetBSD: fpsetround.c,v 1.5 2009/01/25 16:44:41 skrll Exp $ */
/* $OpenBSD: fpsetround.c,v 1.3 2002/10/21 18:41:05 mickey Exp $ */
/*
* Written by Miodrag Vallat. Public domain
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: fpsetround.c,v 1.5 2009/01/25 16:44:41 skrll Exp $");
#endif /* LIBC_SCCS and not lint */
#include <sys/types.h>
#include <ieeefp.h>
fp_rnd
fpsetround(fp_rnd rnd_dir)
{
uint64_t fpsr;
fp_rnd old;
__asm volatile("fstd %%fr0,0(%1)" : "=m" (fpsr) : "r" (&fpsr) : "memory");
old = (fpsr >> 41) & 0x03;
fpsr = (fpsr & 0xfffff9ff00000000LL) |
((uint64_t)(rnd_dir & 0x03) << 41);
__asm volatile("fldd 0(%0),%%fr0" : : "r" (&fpsr) : "memory");
return (old);
}