lib/libc/arch/hppa/gen/fpsetsticky.c

   1 /*      $NetBSD: fpsetsticky.c,v 1.4 2005/12/24 21:42:32 perry Exp $    */
   2
   3 /*      $OpenBSD: fpsetsticky.c,v 1.4 2004/01/05 06:06:16 otto Exp $    */
   4
   5 /*
   6  * Written by Miodrag Vallat.  Public domain
   7  */
   8
   9 #include <sys/cdefs.h>
  10 #if defined(LIBC_SCCS) && !defined(lint)
  11 __RCSID("$NetBSD: fpsetsticky.c,v 1.4 2005/12/24 21:42:32 perry Exp $");
  12 #endif /* LIBC_SCCS and not lint */
  13
  14 #include <sys/types.h>
  15 #include <ieeefp.h>
  16
  17 fp_except
  18 fpsetsticky(fp_except mask)
  19 {
  20         uint64_t fpsr;
  21         fp_except old;
  22
  23         __asm volatile("fstd %%fr0,0(%1)" : "=m" (fpsr) : "r" (&fpsr) : "memory");
  24         old = (fpsr >> 59) & 0x1f;
  25         fpsr = (fpsr & 0x07ffffff00000000LL) | ((uint64_t)(mask & 0x1f) << 59);
  26         __asm volatile("fldd 0(%0),%%fr0" : : "r" (&fpsr) : "memory");
  27
  28         return (old);
  29 }