| /* |
| * Copyright (C) 2014-2021 Free Software Foundation, Inc. |
| * |
| * This file is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License as published by the |
| * Free Software Foundation; either version 3, or (at your option) any |
| * later version. |
| * |
| * This file 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 |
| * General Public License for more details. |
| * |
| * Under Section 7 of GPL version 3, you are granted additional |
| * permissions described in the GCC Runtime Library Exception, version |
| * 3.1, as published by the Free Software Foundation. |
| * |
| * You should have received a copy of the GNU General Public License and |
| * a copy of the GCC Runtime Library Exception along with this program; |
| * see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
| * <http://www.gnu.org/licenses/>. |
| */ |
| |
| /* Enable flush-to-zero support for -ffast-math on VFP targets. */ |
| #ifndef __SOFTFP__ |
| |
| #define FPSCR_FZ (1 << 24) |
| |
| static void __attribute__((constructor)) |
| __arm_set_fast_math (void) |
| { |
| unsigned int fpscr_save; |
| |
| /* Set the FZ (flush-to-zero) bit in FPSCR. */ |
| __asm__("vmrs %0, fpscr" : "=r" (fpscr_save)); |
| fpscr_save |= FPSCR_FZ; |
| __asm__("vmsr fpscr, %0" : : "r" (fpscr_save)); |
| } |
| |
| #endif /* __SOFTFP__ */ |
