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#include <ieeefp.h> 15 16static const int map[] = { 17 1, /* round to nearest */ 18 0, /* round to zero */ 19 2, /* round to positive infinity */ 20 3 /* round to negative infinity */ 21}; 22 23int 24__flt_rounds() 25{ 26#ifdef SOFTFLOAT_FOR_GCC 27 return map[fpgetround()]; 28#else 29 int x; 30 31 __asm("cfc1\t%0,$31" : "=r" (x)); 32 return map[x & 0x03]; 33#endif 34} 35