1 /* $NetBSD: flt_rounds.c,v 1.5 2005/12/24 23:10:08 perry Exp $ */ 2 3 /* 4 * Written by J.T. Conklin, Apr 11, 1995 5 * Public domain. 6 */ 7 8 #include <sys/cdefs.h> 9 #if defined(LIBC_SCCS) && !defined(lint) 10 __RCSID("$NetBSD: flt_rounds.c,v 1.5 2005/12/24 23:10:08 perry Exp $"); 11 #endif /* LIBC_SCCS and not lint */ 12 13 #include <machine/float.h> 14 15 static const int map[] = { 16 1, /* round to nearest */ 17 0, /* round to zero */ 18 2, /* round to positive infinity */ 19 3 /* round to negative infinity */ 20 }; 21 22 int 23 __flt_rounds() 24 { 25 int x; 26 27 __asm("cfc1 %0,$31" : "=r" (x)); 28 return map[x & 0x03]; 29 } 30