150 lines
3.5 KiB
C
150 lines
3.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* IEEE754 floating point
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* common internal header file
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*/
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/*
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* MIPS floating point support
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* Copyright (C) 1994-2000 Algorithmics Ltd.
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*/
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#ifndef __IEEE754INT_H
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#define __IEEE754INT_H
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#include "ieee754.h"
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#define CLPAIR(x, y) ((x)*6+(y))
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enum maddf_flags {
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MADDF_NEGATE_PRODUCT = 1 << 0,
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MADDF_NEGATE_ADDITION = 1 << 1,
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};
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static inline void ieee754_clearcx(void)
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{
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ieee754_csr.cx = 0;
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}
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static inline void ieee754_setcx(const unsigned int flags)
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{
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ieee754_csr.cx |= flags;
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ieee754_csr.sx |= flags;
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}
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static inline int ieee754_setandtestcx(const unsigned int x)
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{
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ieee754_setcx(x);
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return ieee754_csr.mx & x;
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}
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static inline int ieee754_class_nan(int xc)
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{
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return xc >= IEEE754_CLASS_SNAN;
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}
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#define COMPXSP \
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unsigned int xm; int xe; int xs __maybe_unused; int xc
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#define COMPYSP \
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unsigned int ym; int ye; int ys; int yc
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#define COMPZSP \
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unsigned int zm; int ze; int zs; int zc
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#define EXPLODESP(v, vc, vs, ve, vm) \
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{ \
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vs = SPSIGN(v); \
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ve = SPBEXP(v); \
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vm = SPMANT(v); \
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if (ve == SP_EMAX+1+SP_EBIAS) { \
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if (vm == 0) \
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vc = IEEE754_CLASS_INF; \
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else if (ieee754_csr.nan2008 ^ !(vm & SP_MBIT(SP_FBITS - 1))) \
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vc = IEEE754_CLASS_QNAN; \
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else \
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vc = IEEE754_CLASS_SNAN; \
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} else if (ve == SP_EMIN-1+SP_EBIAS) { \
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if (vm) { \
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ve = SP_EMIN; \
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vc = IEEE754_CLASS_DNORM; \
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} else \
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vc = IEEE754_CLASS_ZERO; \
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} else { \
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ve -= SP_EBIAS; \
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vm |= SP_HIDDEN_BIT; \
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vc = IEEE754_CLASS_NORM; \
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} \
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}
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#define EXPLODEXSP EXPLODESP(x, xc, xs, xe, xm)
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#define EXPLODEYSP EXPLODESP(y, yc, ys, ye, ym)
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#define EXPLODEZSP EXPLODESP(z, zc, zs, ze, zm)
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#define COMPXDP \
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u64 xm; int xe; int xs __maybe_unused; int xc
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#define COMPYDP \
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u64 ym; int ye; int ys; int yc
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#define COMPZDP \
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u64 zm; int ze; int zs; int zc
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#define EXPLODEDP(v, vc, vs, ve, vm) \
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{ \
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vm = DPMANT(v); \
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vs = DPSIGN(v); \
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ve = DPBEXP(v); \
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if (ve == DP_EMAX+1+DP_EBIAS) { \
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if (vm == 0) \
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vc = IEEE754_CLASS_INF; \
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else if (ieee754_csr.nan2008 ^ !(vm & DP_MBIT(DP_FBITS - 1))) \
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vc = IEEE754_CLASS_QNAN; \
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else \
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vc = IEEE754_CLASS_SNAN; \
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} else if (ve == DP_EMIN-1+DP_EBIAS) { \
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if (vm) { \
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ve = DP_EMIN; \
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vc = IEEE754_CLASS_DNORM; \
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} else \
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vc = IEEE754_CLASS_ZERO; \
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} else { \
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ve -= DP_EBIAS; \
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vm |= DP_HIDDEN_BIT; \
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vc = IEEE754_CLASS_NORM; \
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} \
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}
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#define EXPLODEXDP EXPLODEDP(x, xc, xs, xe, xm)
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#define EXPLODEYDP EXPLODEDP(y, yc, ys, ye, ym)
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#define EXPLODEZDP EXPLODEDP(z, zc, zs, ze, zm)
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#define FLUSHDP(v, vc, vs, ve, vm) \
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if (vc==IEEE754_CLASS_DNORM) { \
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if (ieee754_csr.nod) { \
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ieee754_setcx(IEEE754_INEXACT); \
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vc = IEEE754_CLASS_ZERO; \
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ve = DP_EMIN-1+DP_EBIAS; \
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vm = 0; \
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v = ieee754dp_zero(vs); \
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} \
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}
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#define FLUSHSP(v, vc, vs, ve, vm) \
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if (vc==IEEE754_CLASS_DNORM) { \
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if (ieee754_csr.nod) { \
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ieee754_setcx(IEEE754_INEXACT); \
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vc = IEEE754_CLASS_ZERO; \
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ve = SP_EMIN-1+SP_EBIAS; \
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vm = 0; \
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v = ieee754sp_zero(vs); \
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} \
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}
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#define FLUSHXDP FLUSHDP(x, xc, xs, xe, xm)
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#define FLUSHYDP FLUSHDP(y, yc, ys, ye, ym)
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#define FLUSHZDP FLUSHDP(z, zc, zs, ze, zm)
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#define FLUSHXSP FLUSHSP(x, xc, xs, xe, xm)
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#define FLUSHYSP FLUSHSP(y, yc, ys, ye, ym)
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#define FLUSHZSP FLUSHSP(z, zc, zs, ze, zm)
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#endif /* __IEEE754INT_H */
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