1/* $OpenBSD: flt_rounds.c,v 1.4 2015/10/27 05:54:49 guenther Exp $ */ 2/* 3 * Written by J.T. Conklin, Apr 11, 1995 4 * Public domain. 5 */ 6 7#include <sys/types.h> 8#include <float.h> 9 10static const int map[] = { 11 1, /* round to nearest */ 12 0, /* round to zero */ 13 2, /* round to positive infinity */ 14 3 /* round to negative infinity */ 15}; 16 17int 18__flt_rounds() 19{ 20 int x; 21 22 __asm__("cfc1 %0,$31" : "=r" (x)); 23 __asm__("nop"); 24 return map[x & 0x03]; 25} 26DEF_STRONG(__flt_rounds); 27