1 /* Install given floating-point control modes. Alpha version. 2 Copyright (C) 2016-2022 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 4 5 The GNU C Library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 The GNU C Library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with the GNU C Library; if not, see 17 <https://www.gnu.org/licenses/>. */ 18 19 #include <fenv_libc.h> 20 21 int fesetmode(const femode_t * modep)22fesetmode (const femode_t *modep) 23 { 24 unsigned long int fpcr; 25 unsigned long int swcr; 26 femode_t mode; 27 28 /* As in fesetenv. */ 29 if ((long int) modep >= 0) 30 mode = *modep; 31 else 32 mode = (unsigned long int) modep; 33 34 __asm__ __volatile__ ("excb; mf_fpcr %0" : "=f" (fpcr)); 35 fpcr = (fpcr & ~FPCR_ROUND_MASK) | (mode & FPCR_ROUND_MASK); 36 __asm__ __volatile__ ("mt_fpcr %0" : : "f" (fpcr)); 37 38 swcr = __ieee_get_fp_control (); 39 swcr = ((mode & SWCR_ALL_MASK & ~SWCR_STATUS_MASK) 40 | (swcr & SWCR_STATUS_MASK)); 41 __ieee_set_fp_control (swcr); 42 43 return 0; 44 } 45