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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* IEEE754 floating point
* common internal header file
*/
/*
* MIPS floating point support
* Copyright (C) 1994-2000 Algorithmics Ltd.
*/
#ifndef __IEEE754INT_H
#define __IEEE754INT_H
#include "ieee754.h"
#define CLPAIR(x, y) ((x)*6+(y))
enum maddf_flags {
MADDF_NEGATE_PRODUCT = 1 << 0,
MADDF_NEGATE_ADDITION = 1 << 1,
};
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 int xm; int xe; int xs __maybe_unused; int xc
#define COMPYSP \
unsigned int ym; int ye; int ys; int yc
#define COMPZSP \
unsigned int 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 */
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