ieee754int.h
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/*
* 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)