1 /* FPU control word definitions. Stub version. 2 Copyright (C) 2000-2022 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 #ifndef _FPU_CONTROL_H 20 #define _FPU_CONTROL_H 21 22 #include <features.h> 23 24 /* These bits are reserved are not changed. */ 25 #define _FPU_RESERVED 0x0707FFFC 26 27 /* The fdlibm code requires no interrupts for exceptions. Don't 28 change the rounding mode, it would break long double I/O! */ 29 #define _FPU_DEFAULT 0x00000000 /* Default value. */ 30 31 /* Type of the control word. */ 32 typedef unsigned int fpu_control_t; 33 34 /* Macros for accessing the hardware control word. */ 35 #define _FPU_GETCW(cw) __asm__ __volatile__ ("efpc %0,0" : "=d" (cw)) 36 #define _FPU_SETCW(cw) __asm__ __volatile__ ("sfpc %0,0" : : "d" (cw)) 37 38 /* Default control word set at startup. */ 39 extern fpu_control_t __fpu_control; 40 41 #endif /* _FPU_CONTROL_H */ 42