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/* $OpenBSD: flt_rounds.c,v 1.6 2015/10/27 05:54:49 guenther Exp $ */
/*
* Written by Miodrag Vallat. Public domain.
*/
#include <sys/types.h>
#include <float.h>
static const int map[] = {
1, /* round to nearest */
0, /* round to zero */
2, /* round to positive infinity */
3 /* round to negative infinity */
};
int
__flt_rounds()
{
u_int64_t fpsr;
__asm__ volatile("fstd %%fr0,0(%1)" : "=m" (fpsr) : "r" (&fpsr));
return map[(fpsr >> 41) & 0x03];
}
DEF_STRONG(__flt_rounds);
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