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/* $OpenBSD: fpsetround.c,v 1.3 2002/10/21 18:41:05 mickey Exp $ */
/*
* Written by Miodrag Vallat. Public domain
*/
#include <sys/types.h>
#include <ieeefp.h>
fp_rnd
fpsetround(rnd_dir)
fp_rnd rnd_dir;
{
u_int64_t fpsr;
fp_rnd old;
__asm__ __volatile__("fstd %%fr0,0(%1)" : "=m" (fpsr) : "r" (&fpsr));
old = (fpsr >> 41) & 0x03;
fpsr = (fpsr & 0xfffff9ff00000000LL) |
((u_int64_t)(rnd_dir & 0x03) << 41);
__asm__ __volatile__("fldd 0(%0),%%fr0" : : "r" (&fpsr));
return (old);
}
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