StdLib/LibC/Main/Ipf/flt_rounds.c

   1 /*
   2  * Written by J.T. Conklin, Apr 10, 1995
   3  * Public domain.
   4  */
   5
   6 #include <sys/EfiCdefs.h>
   7 /* __FBSDID("$FreeBSD: src/lib/libc/ia64/gen/flt_rounds.c,v 1.1 2004/07/19 08:17:24 das Exp $"); */
   8
   9 #include <float.h>
  10
  11 static const int map[] = {
  12         1,      /* round to nearest */
  13         3,      /* round to zero */
  14         2,      /* round to negative infinity */
  15         0       /* round to positive infinity */
  16 };
  17
  18 int
  19 __flt_rounds(void)
  20 {
  21         int x;
  22
  23         __asm("mov %0=ar.fpsr" : "=r" (x));
  24         return (map[(x >> 10) & 0x03]);
  25 }