1 /* 2 * IEEE754 floating point 3 * common internal header file 4 */ 5 /* 6 * MIPS floating point support 7 * Copyright (C) 1994-2000 Algorithmics Ltd. 8 * 9 * This program is free software; you can distribute it and/or modify it 10 * under the terms of the GNU General Public License (Version 2) as 11 * published by the Free Software Foundation. 12 * 13 * This program is distributed in the hope it will be useful, but WITHOUT 14 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 15 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 16 * for more details. 17 * 18 * You should have received a copy of the GNU General Public License along 19 * with this program; if not, write to the Free Software Foundation, Inc., 20 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 21 */ 22 #ifndef __IEEE754INT_H 23 #define __IEEE754INT_H 24 25 #include "ieee754.h" 26 27 #define CLPAIR(x, y) ((x)*6+(y)) 28 29 static inline void ieee754_clearcx(void) 30 { 31 ieee754_csr.cx = 0; 32 } 33 34 static inline void ieee754_setcx(const unsigned int flags) 35 { 36 ieee754_csr.cx |= flags; 37 ieee754_csr.sx |= flags; 38 } 39 40 static inline int ieee754_setandtestcx(const unsigned int x) 41 { 42 ieee754_setcx(x); 43 44 return ieee754_csr.mx & x; 45 } 46 47 static inline int ieee754_class_nan(int xc) 48 { 49 return xc >= IEEE754_CLASS_SNAN; 50 } 51 52 #define COMPXSP \ 53 unsigned xm; int xe; int xs __maybe_unused; int xc 54 55 #define COMPYSP \ 56 unsigned ym; int ye; int ys; int yc 57 58 #define EXPLODESP(v, vc, vs, ve, vm) \ 59 { \ 60 vs = SPSIGN(v); \ 61 ve = SPBEXP(v); \ 62 vm = SPMANT(v); \ 63 if (ve == SP_EMAX+1+SP_EBIAS) { \ 64 if (vm == 0) \ 65 vc = IEEE754_CLASS_INF; \ 66 else if (ieee754_csr.nan2008 ^ !(vm & SP_MBIT(SP_FBITS - 1))) \ 67 vc = IEEE754_CLASS_QNAN; \ 68 else \ 69 vc = IEEE754_CLASS_SNAN; \ 70 } else if (ve == SP_EMIN-1+SP_EBIAS) { \ 71 if (vm) { \ 72 ve = SP_EMIN; \ 73 vc = IEEE754_CLASS_DNORM; \ 74 } else \ 75 vc = IEEE754_CLASS_ZERO; \ 76 } else { \ 77 ve -= SP_EBIAS; \ 78 vm |= SP_HIDDEN_BIT; \ 79 vc = IEEE754_CLASS_NORM; \ 80 } \ 81 } 82 #define EXPLODEXSP EXPLODESP(x, xc, xs, xe, xm) 83 #define EXPLODEYSP EXPLODESP(y, yc, ys, ye, ym) 84 85 86 #define COMPXDP \ 87 u64 xm; int xe; int xs __maybe_unused; int xc 88 89 #define COMPYDP \ 90 u64 ym; int ye; int ys; int yc 91 92 #define EXPLODEDP(v, vc, vs, ve, vm) \ 93 { \ 94 vm = DPMANT(v); \ 95 vs = DPSIGN(v); \ 96 ve = DPBEXP(v); \ 97 if (ve == DP_EMAX+1+DP_EBIAS) { \ 98 if (vm == 0) \ 99 vc = IEEE754_CLASS_INF; \ 100 else if (ieee754_csr.nan2008 ^ !(vm & DP_MBIT(DP_FBITS - 1))) \ 101 vc = IEEE754_CLASS_QNAN; \ 102 else \ 103 vc = IEEE754_CLASS_SNAN; \ 104 } else if (ve == DP_EMIN-1+DP_EBIAS) { \ 105 if (vm) { \ 106 ve = DP_EMIN; \ 107 vc = IEEE754_CLASS_DNORM; \ 108 } else \ 109 vc = IEEE754_CLASS_ZERO; \ 110 } else { \ 111 ve -= DP_EBIAS; \ 112 vm |= DP_HIDDEN_BIT; \ 113 vc = IEEE754_CLASS_NORM; \ 114 } \ 115 } 116 #define EXPLODEXDP EXPLODEDP(x, xc, xs, xe, xm) 117 #define EXPLODEYDP EXPLODEDP(y, yc, ys, ye, ym) 118 119 #define FLUSHDP(v, vc, vs, ve, vm) \ 120 if (vc==IEEE754_CLASS_DNORM) { \ 121 if (ieee754_csr.nod) { \ 122 ieee754_setcx(IEEE754_INEXACT); \ 123 vc = IEEE754_CLASS_ZERO; \ 124 ve = DP_EMIN-1+DP_EBIAS; \ 125 vm = 0; \ 126 v = ieee754dp_zero(vs); \ 127 } \ 128 } 129 130 #define FLUSHSP(v, vc, vs, ve, vm) \ 131 if (vc==IEEE754_CLASS_DNORM) { \ 132 if (ieee754_csr.nod) { \ 133 ieee754_setcx(IEEE754_INEXACT); \ 134 vc = IEEE754_CLASS_ZERO; \ 135 ve = SP_EMIN-1+SP_EBIAS; \ 136 vm = 0; \ 137 v = ieee754sp_zero(vs); \ 138 } \ 139 } 140 141 #define FLUSHXDP FLUSHDP(x, xc, xs, xe, xm) 142 #define FLUSHYDP FLUSHDP(y, yc, ys, ye, ym) 143 #define FLUSHXSP FLUSHSP(x, xc, xs, xe, xm) 144 #define FLUSHYSP FLUSHSP(y, yc, ys, ye, ym) 145 146 #endif /* __IEEE754INT_H */ 147