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https://github.com/torvalds/linux
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ae11c06199
Fix definition and usage of "maddf_flags" enumeration. Avoid duplicate definition and apply more common capitalization. This patch does not change any scenario. It just makes MADDF and MSUBF emulation code more readable and easier to maintain, and hopefully prevents future bugs as well. Signed-off-by: Miodrag Dinic <miodrag.dinic@imgtec.com> Signed-off-by: Goran Ferenc <goran.ferenc@imgtec.com> Signed-off-by: Aleksandar Markovic <aleksandar.markovic@imgtec.com> Reviewed-by: James Hogan <james.hogan@imgtec.com> Cc: Bo Hu <bohu@google.com> Cc: Douglas Leung <douglas.leung@imgtec.com> Cc: Jin Qian <jinqian@google.com> Cc: Paul Burton <paul.burton@imgtec.com> Cc: Petar Jovanovic <petar.jovanovic@imgtec.com> Cc: Raghu Gandham <raghu.gandham@imgtec.com> Cc: <stable@vger.kernel.org> # 4.7+ Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/16889/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
161 lines
4 KiB
C
161 lines
4 KiB
C
/*
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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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* This program is free software; you can distribute it and/or modify it
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* under the terms of the GNU General Public License (Version 2) as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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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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};
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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 xm; int xe; int xs __maybe_unused; int xc
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#define COMPYSP \
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unsigned ym; int ye; int ys; int yc
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#define COMPZSP \
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unsigned 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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