1 /* $OpenBSD: fpsetround.c,v 1.2 2005/08/07 16:40:15 espie Exp $ */ 2 /* 3 * Written by J.T. Conklin, Apr 11, 1995 4 * Public domain. 5 */ 6 7 #include <ieeefp.h> 8 9 fp_rnd fpsetround(rnd_dir)10fpsetround(rnd_dir) 11 fp_rnd rnd_dir; 12 { 13 fp_rnd old; 14 fp_rnd new; 15 16 __asm__("cfc1 %0,$31" : "=r" (old)); 17 18 new = old; 19 new &= ~0x03; 20 new |= (rnd_dir & 0x03); 21 22 __asm__("ctc1 %0,$31" : : "r" (new)); 23 24 return old & 0x03; 25 } 26