lib/libc/arch/mips/gen/flt_rounds.c

   1 /*      $NetBSD: flt_rounds.c,v 1.4 2005/06/12 05:21:26 lukem 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 1.4 2005/06/12 05:21:26 lukem 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 }