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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.
*
* ########################################################################
*/
#ifndef __IEEE754INT_H
#define __IEEE754INT_H
#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))
static inline void ieee754_clearcx(void)
{
ieee754_csr.cx = 0;
}
static inline void ieee754_setcx(const unsigned int flags)
{
ieee754_csr.cx |= flags;
ieee754_csr.sx |= flags;
}
static inline int ieee754_setandtestcx(const unsigned int x)
{
ieee754_setcx(x);
return ieee754_csr.mx & x;
}
static inline int ieee754_tstx(void)
{
return 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) { \
ieee754_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) { \
ieee754_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)
#endif /* __IEEE754INT_H */
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