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flt_rounds.c revision 1.3 
      1 /*	$NetBSD: flt_rounds.c,v 1.3 1997/10/18 02:43:06 jonathan Exp $	*/
      2 
      3 /*
      4  * Written by J.T. Conklin, Apr 11, 1995
      5  * Public domain.
      6  */
      7 
      8 #include <machine/float.h>
      9 
     10 static 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 
     17 int
     18 __flt_rounds()
     19 {
     20 	int x;
     21 
     22 	__asm__("cfc1 %0,$31" : "=r" (x));
     23 	return map[x & 0x03];
     24 }
     25