161 lines
4.0 KiB
C
161 lines
4.0 KiB
C
|
/*
|
||
|
|
* 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.,
|
||
|
|
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
|
||
|
|
*/
|
||
|
|
#ifndef __IEEE754INT_H
|
||
|
|
#define __IEEE754INT_H
|
||
|
|
|
||
|
|
#include "ieee754.h"
|
||
|
|
|
||
|
|
#define CLPAIR(x, y) ((x)*6+(y))
|
||
|
|
|
||
|
|
enum maddf_flags {
|
||
|
|
MADDF_NEGATE_PRODUCT = 1 << 0,
|
||
|
|
};
|
||
|
|
|
||
|
|
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_class_nan(int xc)
|
||
|
|
{
|
||
|
|
return xc >= IEEE754_CLASS_SNAN;
|
||
|
|
}
|
||
|
|
|
||
|
|
#define COMPXSP \
|
||
|
|
unsigned xm; int xe; int xs __maybe_unused; int xc
|
||
|
|
|
||
|
|
#define COMPYSP \
|
||
|
|
unsigned ym; int ye; int ys; int yc
|
||
|
|
|
||
|
|
#define COMPZSP \
|
||
|
|
unsigned zm; int ze; int zs; int zc
|
||
|
|
|
||
|
|
#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 (ieee754_csr.nan2008 ^ !(vm & SP_MBIT(SP_FBITS - 1))) \
|
||
|
|
vc = IEEE754_CLASS_QNAN; \
|
||
|
|
else \
|
||
|
|
vc = IEEE754_CLASS_SNAN; \
|
||
|
|
} 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 EXPLODEZSP EXPLODESP(z, zc, zs, ze, zm)
|
||
|
|
|
||
|
|
|
||
|
|
#define COMPXDP \
|
||
|
|
u64 xm; int xe; int xs __maybe_unused; int xc
|
||
|
|
|
||
|
|
#define COMPYDP \
|
||
|
|
u64 ym; int ye; int ys; int yc
|
||
|
|
|
||
|
|
#define COMPZDP \
|
||
|
|
u64 zm; int ze; int zs; int zc
|
||
|
|
|
||
|
|
#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 (ieee754_csr.nan2008 ^ !(vm & DP_MBIT(DP_FBITS - 1))) \
|
||
|
|
vc = IEEE754_CLASS_QNAN; \
|
||
|
|
else \
|
||
|
|
vc = IEEE754_CLASS_SNAN; \
|
||
|
|
} 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 EXPLODEZDP EXPLODEDP(z, zc, zs, ze, zm)
|
||
|
|
|
||
|
|
#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 FLUSHZDP FLUSHDP(z, zc, zs, ze, zm)
|
||
|
|
#define FLUSHXSP FLUSHSP(x, xc, xs, xe, xm)
|
||
|
|
#define FLUSHYSP FLUSHSP(y, yc, ys, ye, ym)
|
||
|
|
#define FLUSHZSP FLUSHSP(z, zc, zs, ze, zm)
|
||
|
|
|
||
|
|
#endif /* __IEEE754INT_H */
|