[mirror_ubuntu-jammy-kernel.git] / arch / mips / math-emu / ieee754.h

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * MIPS floating point support
 * Copyright (C) 1994-2000 Algorithmics Ltd.
 *
 *  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 <linux/compiler.h>
#include <asm/byteorder.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/sched.h>
#include <asm/bitfield.h>

union ieee754dp {
	struct {
		__BITFIELD_FIELD(unsigned int sign:1,
		__BITFIELD_FIELD(unsigned int bexp:11,
		__BITFIELD_FIELD(u64 mant:52,
		;)))
	};
	u64 bits;
};

union ieee754sp {
	struct {
		__BITFIELD_FIELD(unsigned sign:1,
		__BITFIELD_FIELD(unsigned bexp:8,
		__BITFIELD_FIELD(unsigned mant:23,
		;)))
	};
	u32 bits;
};

/*
 * single precision (often aka float)
*/
int ieee754sp_class(union ieee754sp x);

union ieee754sp ieee754sp_abs(union ieee754sp x);
union ieee754sp ieee754sp_neg(union ieee754sp x);

union ieee754sp ieee754sp_add(union ieee754sp x, union ieee754sp y);
union ieee754sp ieee754sp_sub(union ieee754sp x, union ieee754sp y);
union ieee754sp ieee754sp_mul(union ieee754sp x, union ieee754sp y);
union ieee754sp ieee754sp_div(union ieee754sp x, union ieee754sp y);

union ieee754sp ieee754sp_fint(int x);
union ieee754sp ieee754sp_flong(s64 x);
union ieee754sp ieee754sp_fdp(union ieee754dp x);
union ieee754sp ieee754sp_rint(union ieee754sp x);

int ieee754sp_tint(union ieee754sp x);
s64 ieee754sp_tlong(union ieee754sp x);

int ieee754sp_cmp(union ieee754sp x, union ieee754sp y, int cop, int sig);

union ieee754sp ieee754sp_sqrt(union ieee754sp x);

union ieee754sp ieee754sp_maddf(union ieee754sp z, union ieee754sp x,
				union ieee754sp y);
union ieee754sp ieee754sp_msubf(union ieee754sp z, union ieee754sp x,
				union ieee754sp y);
int ieee754sp_2008class(union ieee754sp x);
union ieee754sp ieee754sp_fmin(union ieee754sp x, union ieee754sp y);
union ieee754sp ieee754sp_fmina(union ieee754sp x, union ieee754sp y);
union ieee754sp ieee754sp_fmax(union ieee754sp x, union ieee754sp y);
union ieee754sp ieee754sp_fmaxa(union ieee754sp x, union ieee754sp y);

/*
 * double precision (often aka double)
*/
int ieee754dp_class(union ieee754dp x);

union ieee754dp ieee754dp_add(union ieee754dp x, union ieee754dp y);
union ieee754dp ieee754dp_sub(union ieee754dp x, union ieee754dp y);
union ieee754dp ieee754dp_mul(union ieee754dp x, union ieee754dp y);
union ieee754dp ieee754dp_div(union ieee754dp x, union ieee754dp y);

union ieee754dp ieee754dp_abs(union ieee754dp x);
union ieee754dp ieee754dp_neg(union ieee754dp x);

union ieee754dp ieee754dp_fint(int x);
union ieee754dp ieee754dp_flong(s64 x);
union ieee754dp ieee754dp_fsp(union ieee754sp x);
union ieee754dp ieee754dp_rint(union ieee754dp x);

int ieee754dp_tint(union ieee754dp x);
s64 ieee754dp_tlong(union ieee754dp x);

int ieee754dp_cmp(union ieee754dp x, union ieee754dp y, int cop, int sig);

union ieee754dp ieee754dp_sqrt(union ieee754dp x);

union ieee754dp ieee754dp_maddf(union ieee754dp z, union ieee754dp x,
				union ieee754dp y);
union ieee754dp ieee754dp_msubf(union ieee754dp z, union ieee754dp x,
				union ieee754dp y);
int ieee754dp_2008class(union ieee754dp x);
union ieee754dp ieee754dp_fmin(union ieee754dp x, union ieee754dp y);
union ieee754dp ieee754dp_fmina(union ieee754dp x, union ieee754dp y);
union ieee754dp ieee754dp_fmax(union ieee754dp x, union ieee754dp y);
union ieee754dp ieee754dp_fmaxa(union ieee754dp x, union ieee754dp y);


/* 5 types of floating point number
*/
enum {
	IEEE754_CLASS_NORM	= 0x00,
	IEEE754_CLASS_ZERO	= 0x01,
	IEEE754_CLASS_DNORM	= 0x02,
	IEEE754_CLASS_INF	= 0x03,
	IEEE754_CLASS_SNAN	= 0x04,
	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

/*
 * The control status register
 */
struct _ieee754_csr {
	__BITFIELD_FIELD(unsigned fcc:7,	/* condition[7:1] */
	__BITFIELD_FIELD(unsigned nod:1,	/* set 1 for no denormals */
	__BITFIELD_FIELD(unsigned c:1,		/* condition[0] */
	__BITFIELD_FIELD(unsigned pad0:3,
	__BITFIELD_FIELD(unsigned abs2008:1,	/* IEEE 754-2008 ABS/NEG.fmt */
	__BITFIELD_FIELD(unsigned nan2008:1,	/* IEEE 754-2008 NaN mode */
	__BITFIELD_FIELD(unsigned cx:6,		/* exceptions this operation */
	__BITFIELD_FIELD(unsigned mx:5,		/* exception enable  mask */
	__BITFIELD_FIELD(unsigned sx:5,		/* exceptions total */
	__BITFIELD_FIELD(unsigned rm:2,		/* current rounding mode */
	;))))))))))
};
#define ieee754_csr (*(struct _ieee754_csr *)(&current->thread.fpu.fcr31))

static inline unsigned int ieee754_getrm(void)
{
	return (ieee754_csr.rm);
}

static inline unsigned int ieee754_setrm(unsigned int rm)
{
	return (ieee754_csr.rm = rm);
}

/*
 * get current exceptions
 */
static inline unsigned int ieee754_getcx(void)
{
	return (ieee754_csr.cx);
}

/* test for current exception condition
 */
static inline int ieee754_cxtest(unsigned int n)
{
	return (ieee754_csr.cx & n);
}

/*
 * get sticky exceptions
 */
static inline unsigned int ieee754_getsx(void)
{
	return (ieee754_csr.sx);
}

/* clear sticky conditions
*/
static inline unsigned int ieee754_clrsx(void)
{
	return (ieee754_csr.sx = 0);
}

/* test for sticky exception condition
 */
static inline int ieee754_sxtest(unsigned int n)
{
	return (ieee754_csr.sx & n);
}

/* debugging */
union ieee754sp ieee754sp_dump(char *s, union ieee754sp x);
union ieee754dp ieee754dp_dump(char *s, union ieee754dp x);

#define IEEE754_SPCVAL_PZERO		0	/* +0.0 */
#define IEEE754_SPCVAL_NZERO		1	/* -0.0 */
#define IEEE754_SPCVAL_PONE		2	/* +1.0 */
#define IEEE754_SPCVAL_NONE		3	/* -1.0 */
#define IEEE754_SPCVAL_PTEN		4	/* +10.0 */
#define IEEE754_SPCVAL_NTEN		5	/* -10.0 */
#define IEEE754_SPCVAL_PINFINITY	6	/* +inf */
#define IEEE754_SPCVAL_NINFINITY	7	/* -inf */
#define IEEE754_SPCVAL_INDEF_LEG	8	/* legacy quiet NaN */
#define IEEE754_SPCVAL_INDEF_2008	9	/* IEEE 754-2008 quiet NaN */
#define IEEE754_SPCVAL_PMAX		10	/* +max norm */
#define IEEE754_SPCVAL_NMAX		11	/* -max norm */
#define IEEE754_SPCVAL_PMIN		12	/* +min norm */
#define IEEE754_SPCVAL_NMIN		13	/* -min norm */
#define IEEE754_SPCVAL_PMIND		14	/* +min denorm */
#define IEEE754_SPCVAL_NMIND		15	/* -min denorm */
#define IEEE754_SPCVAL_P1E31		16	/* + 1.0e31 */
#define IEEE754_SPCVAL_P1E63		17	/* + 1.0e63 */

extern const union ieee754dp __ieee754dp_spcvals[];
extern const union ieee754sp __ieee754sp_spcvals[];
#define ieee754dp_spcvals ((const union ieee754dp *)__ieee754dp_spcvals)
#define ieee754sp_spcvals ((const union ieee754sp *)__ieee754sp_spcvals)

/*
 * Return infinity with given sign
 */
#define ieee754dp_inf(sn)     (ieee754dp_spcvals[IEEE754_SPCVAL_PINFINITY+(sn)])
#define ieee754dp_zero(sn)	(ieee754dp_spcvals[IEEE754_SPCVAL_PZERO+(sn)])
#define ieee754dp_one(sn)	(ieee754dp_spcvals[IEEE754_SPCVAL_PONE+(sn)])
#define ieee754dp_ten(sn)	(ieee754dp_spcvals[IEEE754_SPCVAL_PTEN+(sn)])
#define ieee754dp_indef()	(ieee754dp_spcvals[IEEE754_SPCVAL_INDEF_LEG + \
						   ieee754_csr.nan2008])
#define ieee754dp_max(sn)	(ieee754dp_spcvals[IEEE754_SPCVAL_PMAX+(sn)])
#define ieee754dp_min(sn)	(ieee754dp_spcvals[IEEE754_SPCVAL_PMIN+(sn)])
#define ieee754dp_mind(sn)	(ieee754dp_spcvals[IEEE754_SPCVAL_PMIND+(sn)])
#define ieee754dp_1e31()	(ieee754dp_spcvals[IEEE754_SPCVAL_P1E31])
#define ieee754dp_1e63()	(ieee754dp_spcvals[IEEE754_SPCVAL_P1E63])

#define ieee754sp_inf(sn)     (ieee754sp_spcvals[IEEE754_SPCVAL_PINFINITY+(sn)])
#define ieee754sp_zero(sn)	(ieee754sp_spcvals[IEEE754_SPCVAL_PZERO+(sn)])
#define ieee754sp_one(sn)	(ieee754sp_spcvals[IEEE754_SPCVAL_PONE+(sn)])
#define ieee754sp_ten(sn)	(ieee754sp_spcvals[IEEE754_SPCVAL_PTEN+(sn)])
#define ieee754sp_indef()	(ieee754sp_spcvals[IEEE754_SPCVAL_INDEF_LEG + \
						   ieee754_csr.nan2008])
#define ieee754sp_max(sn)	(ieee754sp_spcvals[IEEE754_SPCVAL_PMAX+(sn)])
#define ieee754sp_min(sn)	(ieee754sp_spcvals[IEEE754_SPCVAL_PMIN+(sn)])
#define ieee754sp_mind(sn)	(ieee754sp_spcvals[IEEE754_SPCVAL_PMIND+(sn)])
#define ieee754sp_1e31()	(ieee754sp_spcvals[IEEE754_SPCVAL_P1E31])
#define ieee754sp_1e63()	(ieee754sp_spcvals[IEEE754_SPCVAL_P1E63])

/*
 * Indefinite integer value
 */
static inline int ieee754si_indef(void)
{
	return ieee754_csr.nan2008 ? 0 : INT_MAX;
}

static inline s64 ieee754di_indef(void)
{
	return ieee754_csr.nan2008 ? 0 : S64_MAX;
}

/*
 * Overflow integer value
 */
static inline int ieee754si_overflow(int xs)
{
	return ieee754_csr.nan2008 && xs ? INT_MIN : INT_MAX;
}

static inline s64 ieee754di_overflow(int xs)
{
	return ieee754_csr.nan2008 && xs ? S64_MIN : S64_MAX;
}

/* result types for xctx.rt */
#define IEEE754_RT_SP	0
#define IEEE754_RT_DP	1
#define IEEE754_RT_XP	2
#define IEEE754_RT_SI	3
#define IEEE754_RT_DI	4

/* compat */
#define ieee754dp_fix(x)	ieee754dp_tint(x)
#define ieee754sp_fix(x)	ieee754sp_tint(x)

#endif /* __ARCH_MIPS_MATH_EMU_IEEE754_H */
Commit	Line	Data
9d5a6349	1	/* SPDX-License-Identifier: GPL-2.0-only */
1da177e4 LT	2	/*
	3	* MIPS floating point support
	4	* Copyright (C) 1994-2000 Algorithmics Ltd.
1da177e4	5	*
1da177e4 LT	6	* Nov 7, 2000
	7	* Modification to allow integration with Linux kernel
	8	*
	9	* Kevin D. Kissell, kevink@mips.com and Carsten Langgard, carstenl@mips.com
	10	* Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved.
cd21dfcf	11	*/
a663bf90 RB	12	#ifndef __ARCH_MIPS_MATH_EMU_IEEE754_H
a663bf90 RB	13	#define __ARCH_MIPS_MATH_EMU_IEEE754_H
1da177e4	14
cae55066	15	#include <linux/compiler.h>
cd21dfcf	16	#include <asm/byteorder.h>
e812a739	17	#include <linux/kernel.h>
1da177e4	18	#include <linux/types.h>
cd21dfcf	19	#include <linux/sched.h>
f80cc08d	20	#include <asm/bitfield.h>
1da177e4	21
2209bcb1	22	union ieee754dp {
1da177e4	23	struct {
f80cc08d RB	24	__BITFIELD_FIELD(unsigned int sign:1,
	25	__BITFIELD_FIELD(unsigned int bexp:11,
	26	__BITFIELD_FIELD(u64 mant:52,
	27	;)))
49548b09	28	};
1da177e4	29	u64 bits;
2209bcb1	30	};
1da177e4	31
2209bcb1	32	union ieee754sp {
49548b09 RB	33	struct {
	34	__BITFIELD_FIELD(unsigned sign:1,
	35	__BITFIELD_FIELD(unsigned bexp:8,
	36	__BITFIELD_FIELD(unsigned mant:23,
	37	;)))
	38	};
1da177e4	39	u32 bits;
2209bcb1	40	};
1da177e4 LT	41
	42	/*
	43	* single precision (often aka float)
	44	*/
2209bcb1	45	int ieee754sp_class(union ieee754sp x);
1da177e4	46
2209bcb1 RB	47	union ieee754sp ieee754sp_abs(union ieee754sp x);
2209bcb1 RB	48	union ieee754sp ieee754sp_neg(union ieee754sp x);
1da177e4	49
2209bcb1 RB	50	union ieee754sp ieee754sp_add(union ieee754sp x, union ieee754sp y);
	51	union ieee754sp ieee754sp_sub(union ieee754sp x, union ieee754sp y);
	52	union ieee754sp ieee754sp_mul(union ieee754sp x, union ieee754sp y);
	53	union ieee754sp ieee754sp_div(union ieee754sp x, union ieee754sp y);
1da177e4	54
2209bcb1	55	union ieee754sp ieee754sp_fint(int x);
2209bcb1	56	union ieee754sp ieee754sp_flong(s64 x);
2209bcb1	57	union ieee754sp ieee754sp_fdp(union ieee754dp x);
3ec404d8	58	union ieee754sp ieee754sp_rint(union ieee754sp x);
1da177e4	59
2209bcb1	60	int ieee754sp_tint(union ieee754sp x);
2209bcb1	61	s64 ieee754sp_tlong(union ieee754sp x);
1da177e4	62
2209bcb1	63	int ieee754sp_cmp(union ieee754sp x, union ieee754sp y, int cop, int sig);
1da177e4	64
2209bcb1	65	union ieee754sp ieee754sp_sqrt(union ieee754sp x);
1da177e4	66
e24c3bec MC	67	union ieee754sp ieee754sp_maddf(union ieee754sp z, union ieee754sp x,
e24c3bec MC	68	union ieee754sp y);
83d43305 MC	69	union ieee754sp ieee754sp_msubf(union ieee754sp z, union ieee754sp x,
83d43305 MC	70	union ieee754sp y);
38db37ba	71	int ieee754sp_2008class(union ieee754sp x);
4e9561b2 MC	72	union ieee754sp ieee754sp_fmin(union ieee754sp x, union ieee754sp y);
4e9561b2 MC	73	union ieee754sp ieee754sp_fmina(union ieee754sp x, union ieee754sp y);
a79f5f9b MC	74	union ieee754sp ieee754sp_fmax(union ieee754sp x, union ieee754sp y);
a79f5f9b MC	75	union ieee754sp ieee754sp_fmaxa(union ieee754sp x, union ieee754sp y);
e24c3bec	76
1da177e4 LT	77	/*
	78	* double precision (often aka double)
	79	*/
2209bcb1	80	int ieee754dp_class(union ieee754dp x);
1da177e4	81
2209bcb1 RB	82	union ieee754dp ieee754dp_add(union ieee754dp x, union ieee754dp y);
	83	union ieee754dp ieee754dp_sub(union ieee754dp x, union ieee754dp y);
	84	union ieee754dp ieee754dp_mul(union ieee754dp x, union ieee754dp y);
	85	union ieee754dp ieee754dp_div(union ieee754dp x, union ieee754dp y);
1da177e4	86
2209bcb1 RB	87	union ieee754dp ieee754dp_abs(union ieee754dp x);
2209bcb1 RB	88	union ieee754dp ieee754dp_neg(union ieee754dp x);
1da177e4	89
2209bcb1	90	union ieee754dp ieee754dp_fint(int x);
2209bcb1	91	union ieee754dp ieee754dp_flong(s64 x);
2209bcb1	92	union ieee754dp ieee754dp_fsp(union ieee754sp x);
3ec404d8	93	union ieee754dp ieee754dp_rint(union ieee754dp x);
1da177e4	94
2209bcb1	95	int ieee754dp_tint(union ieee754dp x);
2209bcb1	96	s64 ieee754dp_tlong(union ieee754dp x);
1da177e4	97
2209bcb1	98	int ieee754dp_cmp(union ieee754dp x, union ieee754dp y, int cop, int sig);
1da177e4	99
2209bcb1	100	union ieee754dp ieee754dp_sqrt(union ieee754dp x);
1da177e4	101
e24c3bec MC	102	union ieee754dp ieee754dp_maddf(union ieee754dp z, union ieee754dp x,
e24c3bec MC	103	union ieee754dp y);
83d43305 MC	104	union ieee754dp ieee754dp_msubf(union ieee754dp z, union ieee754dp x,
83d43305 MC	105	union ieee754dp y);
38db37ba	106	int ieee754dp_2008class(union ieee754dp x);
4e9561b2 MC	107	union ieee754dp ieee754dp_fmin(union ieee754dp x, union ieee754dp y);
4e9561b2 MC	108	union ieee754dp ieee754dp_fmina(union ieee754dp x, union ieee754dp y);
a79f5f9b MC	109	union ieee754dp ieee754dp_fmax(union ieee754dp x, union ieee754dp y);
a79f5f9b MC	110	union ieee754dp ieee754dp_fmaxa(union ieee754dp x, union ieee754dp y);
1da177e4 LT	111
	112
	113	/* 5 types of floating point number
	114	*/
9e8bad1f RB	115	enum {
	116	IEEE754_CLASS_NORM = 0x00,
	117	IEEE754_CLASS_ZERO = 0x01,
	118	IEEE754_CLASS_DNORM = 0x02,
	119	IEEE754_CLASS_INF = 0x03,
	120	IEEE754_CLASS_SNAN = 0x04,
	121	IEEE754_CLASS_QNAN = 0x05,
	122	};
1da177e4 LT	123
	124	/* exception numbers */
	125	#define IEEE754_INEXACT 0x01
	126	#define IEEE754_UNDERFLOW 0x02
	127	#define IEEE754_OVERFLOW 0x04
	128	#define IEEE754_ZERO_DIVIDE 0x08
	129	#define IEEE754_INVALID_OPERATION 0x10
	130
	131	/* cmp operators
	132	*/
	133	#define IEEE754_CLT 0x01
	134	#define IEEE754_CEQ 0x02
	135	#define IEEE754_CGT 0x04
	136	#define IEEE754_CUN 0x08
	137
cd21dfcf RB	138	/*
	139	* The control status register
	140	*/
	141	struct _ieee754_csr {
f1f3b7eb MR	142	__BITFIELD_FIELD(unsigned fcc:7, /* condition[7:1] */
	143	__BITFIELD_FIELD(unsigned nod:1, /* set 1 for no denormals */
	144	__BITFIELD_FIELD(unsigned c:1, /* condition[0] */
	145	__BITFIELD_FIELD(unsigned pad0:3,
	146	__BITFIELD_FIELD(unsigned abs2008:1, /* IEEE 754-2008 ABS/NEG.fmt */
	147	__BITFIELD_FIELD(unsigned nan2008:1, /* IEEE 754-2008 NaN mode */
f80cc08d RB	148	__BITFIELD_FIELD(unsigned cx:6, /* exceptions this operation */
	149	__BITFIELD_FIELD(unsigned mx:5, /* exception enable mask */
	150	__BITFIELD_FIELD(unsigned sx:5, /* exceptions total */
	151	__BITFIELD_FIELD(unsigned rm:2, /* current rounding mode */
f1f3b7eb	152	;))))))))))
1da177e4	153	};
eae89076	154	#define ieee754_csr ((struct _ieee754_csr )(&current->thread.fpu.fcr31))
1da177e4	155
a58f85b5	156	static inline unsigned int ieee754_getrm(void)
1da177e4 LT	157	{
	158	return (ieee754_csr.rm);
	159	}
a58f85b5 AM	160
a58f85b5 AM	161	static inline unsigned int ieee754_setrm(unsigned int rm)
1da177e4 LT	162	{
	163	return (ieee754_csr.rm = rm);
	164	}
	165
	166	/*
	167	* get current exceptions
	168	*/
a58f85b5	169	static inline unsigned int ieee754_getcx(void)
1da177e4 LT	170	{
	171	return (ieee754_csr.cx);
	172	}
	173
	174	/* test for current exception condition
	175	*/
a58f85b5	176	static inline int ieee754_cxtest(unsigned int n)
1da177e4 LT	177	{
	178	return (ieee754_csr.cx & n);
	179	}
	180
	181	/*
	182	* get sticky exceptions
	183	*/
a58f85b5	184	static inline unsigned int ieee754_getsx(void)
1da177e4 LT	185	{
	186	return (ieee754_csr.sx);
	187	}
	188
	189	/* clear sticky conditions
	190	*/
a58f85b5	191	static inline unsigned int ieee754_clrsx(void)
1da177e4 LT	192	{
	193	return (ieee754_csr.sx = 0);
	194	}
	195
	196	/* test for sticky exception condition
	197	*/
a58f85b5	198	static inline int ieee754_sxtest(unsigned int n)
1da177e4 LT	199	{
	200	return (ieee754_csr.sx & n);
	201	}
	202
	203	/* debugging */
2209bcb1 RB	204	union ieee754sp ieee754sp_dump(char *s, union ieee754sp x);
2209bcb1 RB	205	union ieee754dp ieee754dp_dump(char *s, union ieee754dp x);
1da177e4	206
1796ec77 MR	207	#define IEEE754_SPCVAL_PZERO 0 /* +0.0 */
	208	#define IEEE754_SPCVAL_NZERO 1 /* -0.0 */
	209	#define IEEE754_SPCVAL_PONE 2 /* +1.0 */
	210	#define IEEE754_SPCVAL_NONE 3 /* -1.0 */
	211	#define IEEE754_SPCVAL_PTEN 4 /* +10.0 */
	212	#define IEEE754_SPCVAL_NTEN 5 /* -10.0 */
	213	#define IEEE754_SPCVAL_PINFINITY 6 /* +inf */
	214	#define IEEE754_SPCVAL_NINFINITY 7 /* -inf */
90d53a91 MR	215	#define IEEE754_SPCVAL_INDEF_LEG 8 /* legacy quiet NaN */
	216	#define IEEE754_SPCVAL_INDEF_2008 9 /* IEEE 754-2008 quiet NaN */
	217	#define IEEE754_SPCVAL_PMAX 10 /* +max norm */
	218	#define IEEE754_SPCVAL_NMAX 11 /* -max norm */
	219	#define IEEE754_SPCVAL_PMIN 12 /* +min norm */
	220	#define IEEE754_SPCVAL_NMIN 13 /* -min norm */
	221	#define IEEE754_SPCVAL_PMIND 14 /* +min denorm */
	222	#define IEEE754_SPCVAL_NMIND 15 /* -min denorm */
	223	#define IEEE754_SPCVAL_P1E31 16 /* + 1.0e31 */
	224	#define IEEE754_SPCVAL_P1E63 17 /* + 1.0e63 */
1da177e4	225
49548b09 RB	226	extern const union ieee754dp __ieee754dp_spcvals[];
49548b09 RB	227	extern const union ieee754sp __ieee754sp_spcvals[];
2209bcb1 RB	228	#define ieee754dp_spcvals ((const union ieee754dp *)__ieee754dp_spcvals)
2209bcb1 RB	229	#define ieee754sp_spcvals ((const union ieee754sp *)__ieee754sp_spcvals)
1da177e4	230
cd21dfcf RB	231	/*
	232	* Return infinity with given sign
	233	*/
	234	#define ieee754dp_inf(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PINFINITY+(sn)])
	235	#define ieee754dp_zero(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PZERO+(sn)])
	236	#define ieee754dp_one(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PONE+(sn)])
	237	#define ieee754dp_ten(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PTEN+(sn)])
90d53a91 MR	238	#define ieee754dp_indef() (ieee754dp_spcvals[IEEE754_SPCVAL_INDEF_LEG + \
90d53a91 MR	239	ieee754_csr.nan2008])
cd21dfcf RB	240	#define ieee754dp_max(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PMAX+(sn)])
	241	#define ieee754dp_min(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PMIN+(sn)])
	242	#define ieee754dp_mind(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PMIND+(sn)])
	243	#define ieee754dp_1e31() (ieee754dp_spcvals[IEEE754_SPCVAL_P1E31])
	244	#define ieee754dp_1e63() (ieee754dp_spcvals[IEEE754_SPCVAL_P1E63])
	245
	246	#define ieee754sp_inf(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PINFINITY+(sn)])
	247	#define ieee754sp_zero(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PZERO+(sn)])
	248	#define ieee754sp_one(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PONE+(sn)])
	249	#define ieee754sp_ten(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PTEN+(sn)])
90d53a91 MR	250	#define ieee754sp_indef() (ieee754sp_spcvals[IEEE754_SPCVAL_INDEF_LEG + \
90d53a91 MR	251	ieee754_csr.nan2008])
cd21dfcf RB	252	#define ieee754sp_max(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PMAX+(sn)])
	253	#define ieee754sp_min(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PMIN+(sn)])
	254	#define ieee754sp_mind(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PMIND+(sn)])
	255	#define ieee754sp_1e31() (ieee754sp_spcvals[IEEE754_SPCVAL_P1E31])
	256	#define ieee754sp_1e63() (ieee754sp_spcvals[IEEE754_SPCVAL_P1E63])
	257
	258	/*
	259	* Indefinite integer value
	260	*/
e812a739 RB	261	static inline int ieee754si_indef(void)
e812a739 RB	262	{
90d53a91	263	return ieee754_csr.nan2008 ? 0 : INT_MAX;
e812a739 RB	264	}
	265
	266	static inline s64 ieee754di_indef(void)
	267	{
90d53a91 MR	268	return ieee754_csr.nan2008 ? 0 : S64_MAX;
	269	}
	270
	271	/*
	272	* Overflow integer value
	273	*/
	274	static inline int ieee754si_overflow(int xs)
	275	{
	276	return ieee754_csr.nan2008 && xs ? INT_MIN : INT_MAX;
	277	}
	278
	279	static inline s64 ieee754di_overflow(int xs)
	280	{
	281	return ieee754_csr.nan2008 && xs ? S64_MIN : S64_MAX;
e812a739	282	}
1da177e4	283
1da177e4 LT	284	/* result types for xctx.rt */
	285	#define IEEE754_RT_SP 0
	286	#define IEEE754_RT_DP 1
	287	#define IEEE754_RT_XP 2
	288	#define IEEE754_RT_SI 3
	289	#define IEEE754_RT_DI 4
	290
1da177e4 LT	291	/* compat */
	292	#define ieee754dp_fix(x) ieee754dp_tint(x)
	293	#define ieee754sp_fix(x) ieee754sp_tint(x)
a663bf90 RB	294
a663bf90 RB	295	#endif /* __ARCH_MIPS_MATH_EMU_IEEE754_H */