[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / mips / math-emu / ieee754int.h

/*
 * IEEE754 floating point
 * common internal header file
 */
/*
 * 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.
 *
 * ########################################################################
 */


#include "ieee754.h"

#define DP_EBIAS	1023
#define DP_EMIN		(-1022)
#define DP_EMAX		1023
#define DP_MBITS	52

#define SP_EBIAS	127
#define SP_EMIN		(-126)
#define SP_EMAX		127
#define SP_MBITS	23

#define DP_MBIT(x)	((u64)1 << (x))
#define DP_HIDDEN_BIT	DP_MBIT(DP_MBITS)
#define DP_SIGN_BIT	DP_MBIT(63)

#define SP_MBIT(x)	((u32)1 << (x))
#define SP_HIDDEN_BIT	SP_MBIT(SP_MBITS)
#define SP_SIGN_BIT	SP_MBIT(31)


#define SPSIGN(sp)	(sp.parts.sign)
#define SPBEXP(sp)	(sp.parts.bexp)
#define SPMANT(sp)	(sp.parts.mant)

#define DPSIGN(dp)	(dp.parts.sign)
#define DPBEXP(dp)	(dp.parts.bexp)
#define DPMANT(dp)	(dp.parts.mant)

#define CLPAIR(x, y)	((x)*6+(y))

#define CLEARCX \
  (ieee754_csr.cx = 0)

#define SETCX(x) \
  (ieee754_csr.cx |= (x), ieee754_csr.sx |= (x))

#define SETANDTESTCX(x) \
  (SETCX(x), ieee754_csr.mx & (x))

#define TSTX()	\
	(ieee754_csr.cx & ieee754_csr.mx)


#define COMPXSP \
  unsigned xm; int xe; int xs __maybe_unused; int xc

#define COMPYSP \
  unsigned ym; int ye; int ys; int yc

#define EXPLODESP(v, vc, vs, ve, vm) \
{\
    vs = SPSIGN(v);\
    ve = SPBEXP(v);\
    vm = SPMANT(v);\
    if(ve == SP_EMAX+1+SP_EBIAS){\
	if(vm == 0)\
	  vc = IEEE754_CLASS_INF;\
	else if(vm & SP_MBIT(SP_MBITS-1)) \
	  vc = IEEE754_CLASS_SNAN;\
	else \
	  vc = IEEE754_CLASS_QNAN;\
    } else if(ve == SP_EMIN-1+SP_EBIAS) {\
	if(vm) {\
	    ve = SP_EMIN;\
	    vc = IEEE754_CLASS_DNORM;\
	} else\
	  vc = IEEE754_CLASS_ZERO;\
    } else {\
	ve -= SP_EBIAS;\
	vm |= SP_HIDDEN_BIT;\
	vc = IEEE754_CLASS_NORM;\
    }\
}
#define EXPLODEXSP EXPLODESP(x, xc, xs, xe, xm)
#define EXPLODEYSP EXPLODESP(y, yc, ys, ye, ym)


#define COMPXDP \
u64 xm; int xe; int xs __maybe_unused; int xc

#define COMPYDP \
u64 ym; int ye; int ys; int yc

#define EXPLODEDP(v, vc, vs, ve, vm) \
{\
    vm = DPMANT(v);\
    vs = DPSIGN(v);\
    ve = DPBEXP(v);\
    if(ve == DP_EMAX+1+DP_EBIAS){\
	if(vm == 0)\
	  vc = IEEE754_CLASS_INF;\
	else if(vm & DP_MBIT(DP_MBITS-1)) \
	  vc = IEEE754_CLASS_SNAN;\
	else \
	  vc = IEEE754_CLASS_QNAN;\
    } else if(ve == DP_EMIN-1+DP_EBIAS) {\
	if(vm) {\
	    ve = DP_EMIN;\
	    vc = IEEE754_CLASS_DNORM;\
	} else\
	  vc = IEEE754_CLASS_ZERO;\
    } else {\
	ve -= DP_EBIAS;\
	vm |= DP_HIDDEN_BIT;\
	vc = IEEE754_CLASS_NORM;\
    }\
}
#define EXPLODEXDP EXPLODEDP(x, xc, xs, xe, xm)
#define EXPLODEYDP EXPLODEDP(y, yc, ys, ye, ym)

#define FLUSHDP(v, vc, vs, ve, vm) \
	if(vc==IEEE754_CLASS_DNORM) {\
	    if(ieee754_csr.nod) {\
		SETCX(IEEE754_INEXACT);\
		vc = IEEE754_CLASS_ZERO;\
		ve = DP_EMIN-1+DP_EBIAS;\
		vm = 0;\
		v = ieee754dp_zero(vs);\
	    }\
	}

#define FLUSHSP(v, vc, vs, ve, vm) \
	if(vc==IEEE754_CLASS_DNORM) {\
	    if(ieee754_csr.nod) {\
		SETCX(IEEE754_INEXACT);\
		vc = IEEE754_CLASS_ZERO;\
		ve = SP_EMIN-1+SP_EBIAS;\
		vm = 0;\
		v = ieee754sp_zero(vs);\
	    }\
	}

#define FLUSHXDP FLUSHDP(x, xc, xs, xe, xm)
#define FLUSHYDP FLUSHDP(y, yc, ys, ye, ym)
#define FLUSHXSP FLUSHSP(x, xc, xs, xe, xm)
#define FLUSHYSP FLUSHSP(y, yc, ys, ye, ym)
Commit	Line	Data
1da177e4 LT	1	/*
	2	* IEEE754 floating point
	3	* common internal header file
	4	*/
	5	/*
	6	* MIPS floating point support
	7	* Copyright (C) 1994-2000 Algorithmics Ltd.
1da177e4 LT	8	*
	9	* ########################################################################
	10	*
	11	* This program is free software; you can distribute it and/or modify it
	12	* under the terms of the GNU General Public License (Version 2) as
	13	* published by the Free Software Foundation.
	14	*
	15	* This program is distributed in the hope it will be useful, but WITHOUT
	16	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	17	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	18	* for more details.
	19	*
	20	* You should have received a copy of the GNU General Public License along
	21	* with this program; if not, write to the Free Software Foundation, Inc.,
	22	* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
	23	*
	24	* ########################################################################
	25	*/
	26
	27
	28	#include "ieee754.h"
	29
	30	#define DP_EBIAS 1023
	31	#define DP_EMIN (-1022)
	32	#define DP_EMAX 1023
	33	#define DP_MBITS 52
	34
	35	#define SP_EBIAS 127
	36	#define SP_EMIN (-126)
	37	#define SP_EMAX 127
	38	#define SP_MBITS 23
	39
	40	#define DP_MBIT(x) ((u64)1 << (x))
	41	#define DP_HIDDEN_BIT DP_MBIT(DP_MBITS)
	42	#define DP_SIGN_BIT DP_MBIT(63)
	43
	44	#define SP_MBIT(x) ((u32)1 << (x))
	45	#define SP_HIDDEN_BIT SP_MBIT(SP_MBITS)
	46	#define SP_SIGN_BIT SP_MBIT(31)
	47
	48
	49	#define SPSIGN(sp) (sp.parts.sign)
	50	#define SPBEXP(sp) (sp.parts.bexp)
	51	#define SPMANT(sp) (sp.parts.mant)
	52
	53	#define DPSIGN(dp) (dp.parts.sign)
	54	#define DPBEXP(dp) (dp.parts.bexp)
	55	#define DPMANT(dp) (dp.parts.mant)
	56
21a151d8	57	#define CLPAIR(x, y) ((x)*6+(y))
1da177e4	58
70342287	59	#define CLEARCX \
1da177e4 LT	60	(ieee754_csr.cx = 0)
	61
	62	#define SETCX(x) \
21a151d8	63	(ieee754_csr.cx \|= (x), ieee754_csr.sx \|= (x))
1da177e4 LT	64
1da177e4 LT	65	#define SETANDTESTCX(x) \
21a151d8	66	(SETCX(x), ieee754_csr.mx & (x))
1da177e4 LT	67
	68	#define TSTX() \
	69	(ieee754_csr.cx & ieee754_csr.mx)
	70
	71
	72	#define COMPXSP \
91b51f30	73	unsigned xm; int xe; int xs __maybe_unused; int xc
1da177e4 LT	74
	75	#define COMPYSP \
	76	unsigned ym; int ye; int ys; int yc
	77
21a151d8	78	#define EXPLODESP(v, vc, vs, ve, vm) \
1da177e4 LT	79	{\
	80	vs = SPSIGN(v);\
	81	ve = SPBEXP(v);\
	82	vm = SPMANT(v);\
	83	if(ve == SP_EMAX+1+SP_EBIAS){\
	84	if(vm == 0)\
	85	vc = IEEE754_CLASS_INF;\
	86	else if(vm & SP_MBIT(SP_MBITS-1)) \
	87	vc = IEEE754_CLASS_SNAN;\
	88	else \
	89	vc = IEEE754_CLASS_QNAN;\
	90	} else if(ve == SP_EMIN-1+SP_EBIAS) {\
	91	if(vm) {\
	92	ve = SP_EMIN;\
	93	vc = IEEE754_CLASS_DNORM;\
	94	} else\
	95	vc = IEEE754_CLASS_ZERO;\
	96	} else {\
	97	ve -= SP_EBIAS;\
	98	vm \|= SP_HIDDEN_BIT;\
	99	vc = IEEE754_CLASS_NORM;\
	100	}\
	101	}
21a151d8 RB	102	#define EXPLODEXSP EXPLODESP(x, xc, xs, xe, xm)
21a151d8 RB	103	#define EXPLODEYSP EXPLODESP(y, yc, ys, ye, ym)
1da177e4 LT	104
	105
	106	#define COMPXDP \
91b51f30	107	u64 xm; int xe; int xs __maybe_unused; int xc
1da177e4 LT	108
	109	#define COMPYDP \
	110	u64 ym; int ye; int ys; int yc
	111
21a151d8	112	#define EXPLODEDP(v, vc, vs, ve, vm) \
1da177e4 LT	113	{\
	114	vm = DPMANT(v);\
	115	vs = DPSIGN(v);\
	116	ve = DPBEXP(v);\
	117	if(ve == DP_EMAX+1+DP_EBIAS){\
	118	if(vm == 0)\
	119	vc = IEEE754_CLASS_INF;\
	120	else if(vm & DP_MBIT(DP_MBITS-1)) \
	121	vc = IEEE754_CLASS_SNAN;\
	122	else \
	123	vc = IEEE754_CLASS_QNAN;\
	124	} else if(ve == DP_EMIN-1+DP_EBIAS) {\
	125	if(vm) {\
	126	ve = DP_EMIN;\
	127	vc = IEEE754_CLASS_DNORM;\
	128	} else\
	129	vc = IEEE754_CLASS_ZERO;\
	130	} else {\
	131	ve -= DP_EBIAS;\
	132	vm \|= DP_HIDDEN_BIT;\
	133	vc = IEEE754_CLASS_NORM;\
	134	}\
	135	}
21a151d8 RB	136	#define EXPLODEXDP EXPLODEDP(x, xc, xs, xe, xm)
21a151d8 RB	137	#define EXPLODEYDP EXPLODEDP(y, yc, ys, ye, ym)
1da177e4	138
21a151d8	139	#define FLUSHDP(v, vc, vs, ve, vm) \
1da177e4 LT	140	if(vc==IEEE754_CLASS_DNORM) {\
	141	if(ieee754_csr.nod) {\
	142	SETCX(IEEE754_INEXACT);\
	143	vc = IEEE754_CLASS_ZERO;\
	144	ve = DP_EMIN-1+DP_EBIAS;\
	145	vm = 0;\
	146	v = ieee754dp_zero(vs);\
	147	}\
	148	}
	149
21a151d8	150	#define FLUSHSP(v, vc, vs, ve, vm) \
1da177e4 LT	151	if(vc==IEEE754_CLASS_DNORM) {\
	152	if(ieee754_csr.nod) {\
	153	SETCX(IEEE754_INEXACT);\
	154	vc = IEEE754_CLASS_ZERO;\
	155	ve = SP_EMIN-1+SP_EBIAS;\
	156	vm = 0;\
	157	v = ieee754sp_zero(vs);\
	158	}\
	159	}
	160
21a151d8 RB	161	#define FLUSHXDP FLUSHDP(x, xc, xs, xe, xm)
	162	#define FLUSHYDP FLUSHDP(y, yc, ys, ye, ym)
	163	#define FLUSHXSP FLUSHSP(x, xc, xs, xe, xm)
	164	#define FLUSHYSP FLUSHSP(y, yc, ys, ye, ym)