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/*
* MIPS floating point support
* Copyright (C) 1994-2000 Algorithmics Ltd.
*
* This program is free software; you can distribute it and/or modify it
* under the terms of the GNU General Public License (Version 2) as
* published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
*
* Nov 7, 2000
* Modification to allow integration with Linux kernel
*
* Kevin D. Kissell, kevink@mips.com and Carsten Langgard, carstenl@mips.com
* Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved.
*/
#ifndef __ARCH_MIPS_MATH_EMU_IEEE754_H
#define __ARCH_MIPS_MATH_EMU_IEEE754_H
#include <asm/byteorder.h>
#include <linux/types.h>
#include <linux/sched.h>
/*
* Not very pretty, but the Linux kernel's normal va_list definition
* does not allow it to be used as a structure element, as it is here.
*/
#ifndef _STDARG_H
#include <stdarg.h>
#endif
#ifdef __LITTLE_ENDIAN
struct ieee754dp_konst {
unsigned mantlo:32;
unsigned manthi:20;
unsigned bexp:11;
unsigned sign:1;
};
struct ieee754sp_konst {
unsigned mant:23;
unsigned bexp:8;
unsigned sign:1;
};
typedef union _ieee754dp {
struct ieee754dp_konst oparts;
struct {
u64 mant:52;
unsigned int bexp:11;
unsigned int sign:1;
} parts;
u64 bits;
double d;
} ieee754dp;
typedef union _ieee754sp {
struct ieee754sp_konst parts;
float f;
u32 bits;
} ieee754sp;
#endif
#ifdef __BIG_ENDIAN
struct ieee754dp_konst {
unsigned sign:1;
unsigned bexp:11;
unsigned manthi:20;
unsigned mantlo:32;
};
typedef union _ieee754dp {
struct ieee754dp_konst oparts;
struct {
unsigned int sign:1;
unsigned int bexp:11;
u64 mant:52;
} parts;
double d;
u64 bits;
} ieee754dp;
struct ieee754sp_konst {
unsigned sign:1;
unsigned bexp:8;
unsigned mant:23;
};
typedef union _ieee754sp {
struct ieee754sp_konst parts;
float f;
u32 bits;
} ieee754sp;
#endif
/*
* single precision (often aka float)
*/
int ieee754sp_finite(ieee754sp x);
int ieee754sp_class(ieee754sp x);
ieee754sp ieee754sp_abs(ieee754sp x);
ieee754sp ieee754sp_neg(ieee754sp x);
ieee754sp ieee754sp_scalb(ieee754sp x, int);
ieee754sp ieee754sp_logb(ieee754sp x);
/* x with sign of y */
ieee754sp ieee754sp_copysign(ieee754sp x, ieee754sp y);
ieee754sp ieee754sp_add(ieee754sp x, ieee754sp y);
ieee754sp ieee754sp_sub(ieee754sp x, ieee754sp y);
ieee754sp ieee754sp_mul(ieee754sp x, ieee754sp y);
ieee754sp ieee754sp_div(ieee754sp x, ieee754sp y);
ieee754sp ieee754sp_fint(int x);
ieee754sp ieee754sp_funs(unsigned x);
ieee754sp ieee754sp_flong(s64 x);
ieee754sp ieee754sp_fulong(u64 x);
ieee754sp ieee754sp_fdp(ieee754dp x);
int ieee754sp_tint(ieee754sp x);
unsigned int ieee754sp_tuns(ieee754sp x);
s64 ieee754sp_tlong(ieee754sp x);
u64 ieee754sp_tulong(ieee754sp x);
int ieee754sp_cmp(ieee754sp x, ieee754sp y, int cop, int sig);
/*
* basic sp math
*/
ieee754sp ieee754sp_modf(ieee754sp x, ieee754sp * ip);
ieee754sp ieee754sp_frexp(ieee754sp x, int *exp);
ieee754sp ieee754sp_ldexp(ieee754sp x, int exp);
ieee754sp ieee754sp_ceil(ieee754sp x);
ieee754sp ieee754sp_floor(ieee754sp x);
ieee754sp ieee754sp_trunc(ieee754sp x);
ieee754sp ieee754sp_sqrt(ieee754sp x);
/*
* double precision (often aka double)
*/
int ieee754dp_finite(ieee754dp x);
int ieee754dp_class(ieee754dp x);
/* x with sign of y */
ieee754dp ieee754dp_copysign(ieee754dp x, ieee754dp y);
ieee754dp ieee754dp_add(ieee754dp x, ieee754dp y);
ieee754dp ieee754dp_sub(ieee754dp x, ieee754dp y);
ieee754dp ieee754dp_mul(ieee754dp x, ieee754dp y);
ieee754dp ieee754dp_div(ieee754dp x, ieee754dp y);
ieee754dp ieee754dp_abs(ieee754dp x);
ieee754dp ieee754dp_neg(ieee754dp x);
ieee754dp ieee754dp_scalb(ieee754dp x, int);
/* return exponent as integer in floating point format
*/
ieee754dp ieee754dp_logb(ieee754dp x);
ieee754dp ieee754dp_fint(int x);
ieee754dp ieee754dp_funs(unsigned x);
ieee754dp ieee754dp_flong(s64 x);
ieee754dp ieee754dp_fulong(u64 x);
ieee754dp ieee754dp_fsp(ieee754sp x);
ieee754dp ieee754dp_ceil(ieee754dp x);
ieee754dp ieee754dp_floor(ieee754dp x);
ieee754dp ieee754dp_trunc(ieee754dp x);
int ieee754dp_tint(ieee754dp x);
unsigned int ieee754dp_tuns(ieee754dp x);
s64 ieee754dp_tlong(ieee754dp x);
u64 ieee754dp_tulong(ieee754dp x);
int ieee754dp_cmp(ieee754dp x, ieee754dp y, int cop, int sig);
/*
* basic sp math
*/
ieee754dp ieee754dp_modf(ieee754dp x, ieee754dp * ip);
ieee754dp ieee754dp_frexp(ieee754dp x, int *exp);
ieee754dp ieee754dp_ldexp(ieee754dp x, int exp);
ieee754dp ieee754dp_ceil(ieee754dp x);
ieee754dp ieee754dp_floor(ieee754dp x);
ieee754dp ieee754dp_trunc(ieee754dp x);
ieee754dp ieee754dp_sqrt(ieee754dp x);
/* 5 types of floating point number
*/
#define IEEE754_CLASS_NORM 0x00
#define IEEE754_CLASS_ZERO 0x01
#define IEEE754_CLASS_DNORM 0x02
#define IEEE754_CLASS_INF 0x03
#define IEEE754_CLASS_SNAN 0x04
#define IEEE754_CLASS_QNAN 0x05
/* exception numbers */
#define IEEE754_INEXACT 0x01
#define IEEE754_UNDERFLOW 0x02
#define IEEE754_OVERFLOW 0x04
#define IEEE754_ZERO_DIVIDE 0x08
#define IEEE754_INVALID_OPERATION 0x10
/* cmp operators
*/
#define IEEE754_CLT 0x01
#define IEEE754_CEQ 0x02
#define IEEE754_CGT 0x04
#define IEEE754_CUN 0x08
/* rounding mode
*/
#define IEEE754_RN 0 /* round to nearest */
#define IEEE754_RZ 1 /* round toward zero */
#define IEEE754_RD 2 /* round toward -Infinity */
#define IEEE754_RU 3 /* round toward +Infinity */
/* other naming */
#define IEEE754_RM IEEE754_RD
#define IEEE754_RP IEEE754_RU
/* "normal" comparisons
*/
static inline int ieee754sp_eq(ieee754sp x, ieee754sp y)
{
return ieee754sp_cmp(x, y, IEEE754_CEQ, 0);
}
static inline int ieee754sp_ne(ieee754sp x, ieee754sp y)
{
return ieee754sp_cmp(x, y,
IEEE754_CLT | IEEE754_CGT | IEEE754_CUN, 0);
}
static inline int ieee754sp_lt(ieee754sp x, ieee754sp y)
{
return ieee754sp_cmp(x, y, IEEE754_CLT, 0);
}
static inline int ieee754sp_le(ieee754sp x, ieee754sp y)
{
return ieee754sp_cmp(x, y, IEEE754_CLT | IEEE754_CEQ, 0);
}
static inline int ieee754sp_gt(ieee754sp x, ieee754sp y)
{
return ieee754sp_cmp(x, y, IEEE754_CGT, 0);
}
static inline int ieee754sp_ge(ieee754sp x, ieee754sp y)
{
return ieee754sp_cmp(x, y, IEEE754_CGT | IEEE754_CEQ, 0);
}
static inline int ieee754dp_eq(ieee754dp x, ieee754dp y)
{
return ieee754dp_cmp(x, y, IEEE754_CEQ, 0);
}
static inline int ieee754dp_ne(ieee754dp x, ieee754dp y)
{
return ieee754dp_cmp(x, y,
IEEE754_CLT | IEEE754_CGT | IEEE754_CUN, 0);
}
static inline int ieee754dp_lt(ieee754dp x, ieee754dp y)
{
return ieee754dp_cmp(x, y, IEEE754_CLT, 0);
}
static inline int ieee754dp_le(ieee754dp x, ieee754dp y)
{
return ieee754dp_cmp(x, y, IEEE754_CLT | IEEE754_CEQ, 0);
}
static inline int ieee754dp_gt(ieee754dp x, ieee754dp y)
{
return ieee754dp_cmp(x, y, IEEE754_CGT, 0);
}
static inline int ieee754dp_ge(ieee754dp x, ieee754dp y)
{
return ieee754dp_cmp(x, y, IEEE754_CGT | IEEE754_CEQ, 0
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