/* FPU control word definitions. ARM VFP version. Copyright (C) 2004-2015 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library. If not, see <http://www.gnu.org/licenses/>. */ #ifndef _FPU_CONTROL_H #define _FPU_CONTROL_H #if !(defined(_LIBC) && !defined(_LIBC_TEST)) && defined(__SOFTFP__) #define _FPU_RESERVED 0xffffffff #define _FPU_DEFAULT 0x00000000 typedef unsigned int fpu_control_t; #define _FPU_GETCW(cw) (cw) = 0 #define _FPU_SETCW(cw) (void) (cw) extern fpu_control_t __fpu_control; #else /* masking of interrupts */ #define _FPU_MASK_IM 0x00000100 /* invalid operation */ #define _FPU_MASK_ZM 0x00000200 /* divide by zero */ #define _FPU_MASK_OM 0x00000400 /* overflow */ #define _FPU_MASK_UM 0x00000800 /* underflow */ #define _FPU_MASK_PM 0x00001000 /* inexact */ #define _FPU_MASK_NZCV 0xf0000000 /* NZCV flags */ #define _FPU_MASK_RM 0x00c00000 /* rounding mode */ #define _FPU_MASK_EXCEPT 0x00001f1f /* all exception flags */ /* Some bits in the FPSCR are not yet defined. They must be preserved when modifying the contents. */ #define _FPU_RESERVED 0x00086060 #define _FPU_DEFAULT 0x00000000 /* Default + exceptions enabled. */ #define _FPU_IEEE (_FPU_DEFAULT | 0x00001f00) /* Type of the control word. */ typedef unsigned int fpu_control_t; /* Macros for accessing the hardware control word. */ /* This is fmrx %0, fpscr. */ #define _FPU_GETCW(cw) \ __asm__ __volatile__ ("mrc p10, 7, %0, cr1, cr0, 0" : "=r" (cw)) /* This is fmxr fpscr, %0. */ #define _FPU_SETCW(cw) \ __asm__ __volatile__ ("mcr p10, 7, %0, cr1, cr0, 0" : : "r" (cw)) /* Default control word set at startup. */ extern fpu_control_t __fpu_control; #endif /* __SOFTFP__ */ #endif /* _FPU_CONTROL_H */