root/sys/arch/sh/include/fpu.h
#ifndef _SH_FPU_H_
/*      $OpenBSD: fpu.h,v 1.1 2006/11/05 18:57:20 miod Exp $    */
/*
 * Copyright (c) 2006, Miodrag Vallat
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#define _SH_FPU_H_

/*
 * SH4{,a} FPU definitions
 */

/* FPSCR bits */

#define FPSCR_RB                0x00200000      /* register bank */
#define FPSCR_SZ                0x00100000      /* transfer size mode */
#define FPSCR_PR                0x00080000      /* precision mode */
#define FPSCR_DN                0x00040000      /* denormalization mode */
#define FPSCR_CAUSE_MASK        0x0003f000      /* exception cause mask */
#define FPSCR_CAUSE_SHIFT       12
#define FPSCR_ENABLE_MASK       0x00000f80      /* exception enable mask */
#define FPSCR_ENABLE_SHIFT      7
#define FPSCR_FLAG_MASK         0x0000007c      /* exception sticky mask */
#define FPSCR_FLAG_SHIFT        2
#define FPSCR_ROUNDING_MASK     0x00000003      /* rounding mask */

/* FPSCR exception bits */

#define FPEXC_E                 0x20    /* FPU Error */
#define FPEXC_V                 0x10    /* invalid operation */
#define FPEXC_Z                 0x08    /* divide by zero */
#define FPEXC_O                 0x04    /* overflow */
#define FPEXC_U                 0x02    /* underflow */
#define FPEXC_I                 0x01    /* inexact */

#endif  /* _SH_FPU_H_ */