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c9a1084516
We have the input operands already classified in `ieee754sp_cmp' and `ieee754dp_cmp' comparison operations, so use the class obtained to tell NaNs and numbers apart rather than classifying inputs again for this purpose, reducing the size of code by 24 and 40 instructions or 96 and 160 bytes respectively. Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/9689/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
147 lines
3.7 KiB
C
147 lines
3.7 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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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 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 (vm & SP_MBIT(SP_FBITS-1)) \
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vc = IEEE754_CLASS_SNAN; \
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else \
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vc = IEEE754_CLASS_QNAN; \
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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 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 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 (vm & DP_MBIT(DP_FBITS-1)) \
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vc = IEEE754_CLASS_SNAN; \
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else \
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vc = IEEE754_CLASS_QNAN; \
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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 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 FLUSHXSP FLUSHSP(x, xc, xs, xe, xm)
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#define FLUSHYSP FLUSHSP(y, yc, ys, ye, ym)
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#endif /* __IEEE754INT_H */
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