1 /* $OpenBSD: flt_rounds.c,v 1.4 2015/10/27 05:54:49 guenther Exp $ */ 2 /* $NetBSD: flt_rounds.c,v 1.1 1998/09/11 04:56:23 eeh Exp $ */ 3 4 /* 5 * Written by J.T. Conklin, Apr 10, 1995 6 * Public domain. 7 */ 8 9 #include <sys/types.h> 10 #include <float.h> 11 12 static const int map[] = { 13 1, /* round to nearest */ 14 0, /* round to zero */ 15 2, /* round to positive infinity */ 16 3 /* round to negative infinity */ 17 }; 18 19 int 20 __flt_rounds() 21 { 22 int x; 23 24 __asm__("st %%fsr,%0" : "=m" (*&x)); 25 return map[(x >> 30) & 0x03]; 26 } 27 DEF_STRONG(__flt_rounds); 28