| /* FPU control word definitions. SH version. |
| Copyright (C) 1999, 2000, 2009, 2010 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, write to the Free |
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| #ifndef _FPU_CONTROL_H |
| #define _FPU_CONTROL_H |
| |
| #include <features.h> |
| |
| /* 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__ |
| __BEGIN_DECLS |
| |
| /* 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 |
| |
| /* Default control word set at startup. */ |
| extern fpu_control_t __fpu_control; |
| |
| __END_DECLS |
| #endif /* _FPU_CONTROL_H */ |