/* * Copyright (C) 2014-2017 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__ */ |