/* $NetBSD: flt_rounds.c,v 1.5 2012/03/23 09:34:09 skrll Exp $ */ /* $OpenBSD: flt_rounds.c,v 1.3 2002/10/21 18:41:05 mickey Exp $ */ /* * Written by Miodrag Vallat. Public domain. */ #include <sys/cdefs.h> #if defined(LIBC_SCCS) && !defined(lint) __RCSID("$NetBSD: flt_rounds.c,v 1.5 2012/03/23 09:34:09 skrll Exp $"); #endif /* LIBC_SCCS and not lint */ #include <sys/types.h> #include <machine/float.h> static const int map[] = { 1, /* round to nearest */ 0, /* round to zero */ 2, /* round to positive infinity */ 3 /* round to negative infinity */ }; int __flt_rounds(void) { uint64_t fpsr; __asm volatile("fstd %%fr0,0(%1)" : "=m" (fpsr) : "r" (&fpsr)); return map[(unsigned int)(fpsr >> 41) & 0x03]; } |