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/* $OpenBSD: ieeefp.h,v 1.4 2010/04/21 15:37:32 miod Exp $ */
/*
* Copyright (c) 1996 Nivas Madhur
* All rights reserved.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Nivas Madhur.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* 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.
*
*/
/*
* Values for fp_except are selected to match the bits in FPSR (see
* m88100 user's manual page 6-33). This file is derived from the
* definitions in the ABI/88k manual and sparc port.
* -- Nivas
*/
#ifndef _M88K_IEEEFP_H_
#define _M88K_IEEEFP_H_
typedef int fp_except;
#define FP_X_INV 0x10 /* invalid operation exception */
#define FP_X_DZ 0x08 /* divide-by-zero exception */
#define FP_X_UFL 0x04 /* underflow exception */
#define FP_X_OFL 0x02 /* overflow exception */
#define FP_X_IMP 0x01 /* imprecise (loss of precision) */
typedef enum {
FP_RN=0, /* round to nearest representable number */
FP_RZ=1, /* round to zero (truncate) */
FP_RM=2, /* round toward negative infinity */
FP_RP=3 /* round toward positive infinity */
} fp_rnd;
#ifdef _KERNEL
/*
* Defines for the 88110 floating-point completion code.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#define float_raise(bits) curproc->p_md.md_tf->tf_fpsr |= bits
#define float_set_inexact() float_raise(FP_X_IMP)
#define float_set_invalid() float_raise(FP_X_INV)
/* rounding mode bits position in FPCR */
#define FPCR_RD_SHIFT 14
#define FPCR_RD_MASK 0x03
#define float_get_round(fpcr) (((fpcr) >> FPCR_RD_SHIFT) & FPCR_RD_MASK)
#define fpgetround() float_get_round(curproc->p_md.md_tf->tf_fpcr)
#define SOFTFLOAT_MD_CLZ
static inline int
countLeadingZeros32(u_int32_t a)
{
int rc;
asm volatile("ff1 %0, %1" : "=r"(rc) : "r"(a));
return (a != 0 ? 31 - rc : rc);
}
#endif
#endif /* _M88K_IEEEFP_H_ */
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