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/* 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 */
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