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Diffstat (limited to 'kernel/arch/mips/math-emu/ieee754int.h')
| -rw-r--r-- | kernel/arch/mips/math-emu/ieee754int.h | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/kernel/arch/mips/math-emu/ieee754int.h b/kernel/arch/mips/math-emu/ieee754int.h new file mode 100644 index 000000000..05389d5e3 --- /dev/null +++ b/kernel/arch/mips/math-emu/ieee754int.h @@ -0,0 +1,146 @@ +/* + * 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)) + +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 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 (vm & SP_MBIT(SP_FBITS-1)) \ + vc = IEEE754_CLASS_SNAN; \ + else \ + vc = IEEE754_CLASS_QNAN; \ + } 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 COMPXDP \ + u64 xm; int xe; int xs __maybe_unused; int xc + +#define COMPYDP \ + u64 ym; int ye; int ys; int yc + +#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 (vm & DP_MBIT(DP_FBITS-1)) \ + vc = IEEE754_CLASS_SNAN; \ + else \ + vc = IEEE754_CLASS_QNAN; \ + } 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 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 FLUSHXSP FLUSHSP(x, xc, xs, xe, xm) +#define FLUSHYSP FLUSHSP(y, yc, ys, ye, ym) + +#endif /* __IEEE754INT_H */ |