| |
| /* |
| * Copyright (C) 2008-2009 Advanced Micro Devices, Inc. All Rights Reserved. |
| * |
| * This file is part of libacml_mv. |
| * |
| * libacml_mv 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. |
| * |
| * libacml_mv 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 libacml_mv. If not, see |
| * <http://www.gnu.org/licenses/>. |
| * |
| */ |
| |
| |
| #ifdef WIN64 |
| #include <fpieee.h> |
| #else |
| #include <errno.h> |
| #endif |
| |
| #include <math.h> |
| |
| #include "libm_amd.h" |
| #include "libm_util_amd.h" |
| #include "libm_special.h" |
| |
| |
| long long int FN_PROTOTYPE(llrint)(double x) |
| { |
| |
| |
| UT64 checkbits,val_2p52; |
| checkbits.f64=x; |
| |
| /* Clear the sign bit and check if the value can be rounded */ |
| |
| if( (checkbits.u64 & 0x7FFFFFFFFFFFFFFF) > 0x4330000000000000) |
| { |
| /* number cant be rounded raise an exception */ |
| /* Number exceeds the representable range could be nan or inf also*/ |
| __amd_handle_error(DOMAIN, EDOM, "llrint", x,0.0 ,(double)x); |
| |
| return (long long int) x; |
| } |
| |
| val_2p52.u32[1] = (checkbits.u32[1] & 0x80000000) | 0x43300000; |
| val_2p52.u32[0] = 0; |
| |
| |
| /* Add and sub 2^52 to round the number according to the current rounding direction */ |
| |
| return (long long int) ((x + val_2p52.f64) - val_2p52.f64); |
| } |