From 6ce38a95a4c8318df75cf91fbd90101601b3fa7f Mon Sep 17 00:00:00 2001 From: Jakub Jelinek Date: Sat, 17 Mar 2007 21:53:01 +0000 Subject: Updated to fedora-glibc-20070317T2130 --- sysdeps/alpha/fpu/s_roundf.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 sysdeps/alpha/fpu/s_roundf.c (limited to 'sysdeps/alpha/fpu/s_roundf.c') diff --git a/sysdeps/alpha/fpu/s_roundf.c b/sysdeps/alpha/fpu/s_roundf.c new file mode 100644 index 0000000000..89584f062b --- /dev/null +++ b/sysdeps/alpha/fpu/s_roundf.c @@ -0,0 +1,44 @@ +/* Copyright (C) 2007 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Richard Henderson. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include + + +float +__roundf (float x) +{ + const float almost_half = 0x1.fffffep-2; + const float two23 = 0x1.0p23; + float r, tmp; + + __asm ( +#ifdef _IEEE_FP_INEXACT + "adds/suic %2, %3, %1\n\tsubs/suic %1, %3, %0" +#else + "adds/suc %2, %3, %1\n\tsubs/suc %1, %3, %0" +#endif + : "=&f"(r), "=&f"(tmp) + : "f"(fabsf (x) + almost_half), "f"(two23)); + + /* round(-0) == -0, and in general we'll always have the same + sign as our input. */ + return copysignf (r, x); +} + +weak_alias (__roundf, roundf) -- cgit 1.4.1