1*e415d488SLionel Sambuc /* $NetBSD: flt_rounds.c,v 1.7 2012/03/21 00:38:34 christos Exp $ */ 22fe8fb19SBen Gras 32fe8fb19SBen Gras /* 42fe8fb19SBen Gras * Written by J.T. Conklin, Apr 10, 1995 52fe8fb19SBen Gras * Public domain. 62fe8fb19SBen Gras */ 72fe8fb19SBen Gras 82fe8fb19SBen Gras #include <sys/cdefs.h> 92fe8fb19SBen Gras #if defined(LIBC_SCCS) && !defined(lint) 10*e415d488SLionel Sambuc __RCSID("$NetBSD: flt_rounds.c,v 1.7 2012/03/21 00:38:34 christos Exp $"); 112fe8fb19SBen Gras #endif /* LIBC_SCCS and not lint */ 122fe8fb19SBen Gras 132fe8fb19SBen Gras #include <sys/types.h> 142fe8fb19SBen Gras #include <machine/float.h> 152fe8fb19SBen Gras 162fe8fb19SBen Gras static const int map[] = { 172fe8fb19SBen Gras 1, /* round to nearest */ 182fe8fb19SBen Gras 0, /* round to zero */ 192fe8fb19SBen Gras 2, /* round to positive infinity */ 202fe8fb19SBen Gras 3 /* round to negative infinity */ 212fe8fb19SBen Gras }; 222fe8fb19SBen Gras 232fe8fb19SBen Gras int __flt_rounds(void)24*e415d488SLionel Sambuc__flt_rounds(void) 252fe8fb19SBen Gras { 26*e415d488SLionel Sambuc unsigned int x; 272fe8fb19SBen Gras 282fe8fb19SBen Gras __asm("st %%fsr,%0" : "=m" (*&x)); 292fe8fb19SBen Gras return map[(x >> 30) & 0x03]; 302fe8fb19SBen Gras } 31