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- /*
- * Copyright (C) 2007-2022 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/>.
- */
- #ifndef _SOFT_FLOAT
- #if __PREC == 32
- #define X87CW (0 << 8) /* Single precision (24 bits) */
- #elif __PREC == 64
- #define X87CW (2 << 8) /* Double precision (53 bits) */
- #elif __PREC == 80
- #define X87CW (3 << 8) /* Extended precision (64 bits) */
- #else
- #error "Wrong precision requested."
- #endif
- #define X87CW_PCMASK (3 << 8)
- static void __attribute__((constructor))
- set_precision (void)
- {
- unsigned short int cwd;
- asm volatile ("fnstcw\t%0" : "=m" (cwd));
- cwd &= ~X87CW_PCMASK;
- cwd |= X87CW;
- asm volatile ("fldcw\t%0" : : "m" (cwd));
- }
- #endif
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