| /* lround function. POWER6x, PowerPC32 version. |
| Copyright (C) 2006-2014 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 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, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <sysdep.h> |
| #include <math_ldbl_opt.h> |
| |
| /* long [r3] lround (float x [fp1]) |
| IEEE 1003.1 lround function. IEEE specifies "round to the nearest |
| integer value, rounding halfway cases away from zero, regardless of |
| the current rounding mode." However PowerPC Architecture defines |
| "round to Nearest" as "Choose the best approximation. In case of a |
| tie, choose the one that is even (least significant bit o).". |
| So we pre-round using the V2.02 Floating Round to Integer Nearest |
| instruction before we use the Floating Convert to Integer Word with |
| round to zero instruction. */ |
| |
| .machine "power6" |
| ENTRY (__lround) |
| frin fp2,fp1 /* Pre-round +-0.5. */ |
| fctiwz fp3,fp2 /* Convert To Integer Word lround toward 0. */ |
| mftgpr r3,fp3 /* Transfer fpr3 to r3. */ |
| blr |
| END (__lround) |
| |
| weak_alias (__lround, lround) |
| |
| strong_alias (__lround, __lroundf) |
| weak_alias (__lround, lroundf) |
| |
| #ifdef NO_LONG_DOUBLE |
| weak_alias (__lround, lroundl) |
| strong_alias (__lround, __lroundl) |
| #endif |
| #if LONG_DOUBLE_COMPAT(libm, GLIBC_2_1) |
| compat_symbol (libm, __lround, lroundl, GLIBC_2_1) |
| #endif |