1 /* $OpenBSD: flt_rounds.c,v 1.3 2012/06/25 17:01:11 deraadt Exp $ */ 2 /* 3 * Written by J.T. Conklin, Apr 11, 1995 4 * Public domain. 5 */ 6 7 #include <sys/types.h> 8 #include <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 __asm__("nop"); 24 return map[x & 0x03]; 25 } 26