From 28f540f45bbacd939bfd07f213bcad2bf730b1bf Mon Sep 17 00:00:00 2001 From: Roland McGrath Date: Sat, 18 Feb 1995 01:27:10 +0000 Subject: initial import --- sysdeps/vax/infnan.c | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 62 insertions(+) create mode 100644 sysdeps/vax/infnan.c (limited to 'sysdeps/vax/infnan.c') diff --git a/sysdeps/vax/infnan.c b/sysdeps/vax/infnan.c new file mode 100644 index 0000000000..62ec9dca0f --- /dev/null +++ b/sysdeps/vax/infnan.c @@ -0,0 +1,62 @@ +/* Copyright (C) 1991, 1992, 1995 Free Software Foundation, Inc. +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#ifndef __GNUC__ + #error This file uses GNU C extensions; you must compile with GCC. +#else + +#include +#include +#include + +/* Deal with an infinite or NaN result. + If ERROR is ERANGE, result is +Inf; + if ERROR is - ERANGE, result is -Inf; + otherwise result is NaN. + This will set `errno' to either ERANGE or EDOM, + and may return an infinity or NaN, or may do something else. */ +double +DEFUN(__infnan, (error), int error) +{ + switch (error) + { + case ERANGE: + errno = ERANGE; + break; + + case - ERANGE: + errno = ERANGE; + break; + + default: + errno = EDOM; + break; + } + + /* Trigger a reserved operand fault. */ + { + double result; + asm volatile("emodd %1, %1, %2, %0, %0" : "=r" (result) : + "i" (0), "i" (0x8000)); + return result; + } +} + +#endif + +weak_alias (__infnan, infnan) -- cgit 1.4.1