/* FPU control word definitions. SH version. Copyright (C) 1999, 2000, 2009 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 #ifndef __SH4__ #error This file is only correct for sh4 #endif /* masking of interrupts */ #define _FPU_MASK_VM 0x0800 /* Invalid operation */ #define _FPU_MASK_ZM 0x0400 /* Division by zero */ #define _FPU_MASK_OM 0x0200 /* Overflow */ #define _FPU_MASK_UM 0x0100 /* Underflow */ #define _FPU_MASK_IM 0x0080 /* Inexact operation */ /* rounding control */ #define _FPU_RC_NEAREST 0x0 /* RECOMMENDED */ #define _FPU_RC_ZERO 0x1 #define _FPU_RESERVED 0xffc00000 /* These bits are reserved. */ /* The fdlibm code requires strict IEEE double precision arithmetic, and no interrupts for exceptions, rounding to nearest. */ #define _FPU_DEFAULT 0x00080000 /* Default value. */ #define _FPU_IEEE 0x00080f80 /* Default + exceptions enabled. */ /* Type of the control word. */ typedef unsigned int fpu_control_t; /* Macros for accessing the hardware control word. */ #define _FPU_GETCW(cw) __asm__ ("sts fpscr,%0" : "=r" (cw)) #if defined __GNUC__ /* GCC provides this function */ extern void __set_fpscr (unsigned long); #define _FPU_SETCW(cw) __set_fpscr ((cw)) #else #define _FPU_SETCW(cw) __asm__ ("lds %0,fpscr" : : "r" (cw)) #endif #if 0 /* Default control word set at startup. */ extern fpu_control_t __fpu_control; #endif #endif /* _FPU_CONTROL_H */