blob: ef9c29dbd51d10f381f33615eba2752cfd6072a5 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
|
/*
* Written by Michael Shalayeff. Public Domain
*/
#if defined(LIBM_SCCS) && !defined(lint)
static char rcsid[] = "$OpenBSD: s_floor.c,v 1.5 2009/06/30 20:20:20 kettenis Exp $";
#endif
#include <sys/types.h>
#include <machine/ieeefp.h>
#include "math.h"
double
floor(double x)
{
u_int64_t ofpsr, fpsr;
__asm__ __volatile__("fstds %%fr0,0(%1)" : "=m" (ofpsr) : "r" (&ofpsr));
fpsr = ofpsr | ((u_int64_t)FP_RM << (9 + 32));
__asm__ __volatile__("fldds 0(%0), %%fr0" :: "r" (&fpsr));
__asm__ __volatile__("frnd,dbl %0,%0" : "+f" (x));
__asm__ __volatile__("fldds 0(%0), %%fr0" :: "r" (&ofpsr));
return (x);
}
|
