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 COMPZSP \ 59 unsigned zm; int ze; int zs; int zc 60 61 #define EXPLODESP(v, vc, vs, ve, vm) \ 62 { \ 63 vs = SPSIGN(v); \ 64 ve = SPBEXP(v); \ 65 vm = SPMANT(v); \ 66 if (ve == SP_EMAX+1+SP_EBIAS) { \ 67 if (vm == 0) \ 68 vc = IEEE754_CLASS_INF; \ 69 else if (ieee754_csr.nan2008 ^ !(vm & SP_MBIT(SP_FBITS - 1))) \ 70 vc = IEEE754_CLASS_QNAN; \ 71 else \ 72 vc = IEEE754_CLASS_SNAN; \ 73 } else if (ve == SP_EMIN-1+SP_EBIAS) { \ 74 if (vm) { \ 75 ve = SP_EMIN; \ 76 vc = IEEE754_CLASS_DNORM; \ 77 } else \ 78 vc = IEEE754_CLASS_ZERO; \ 79 } else { \ 80 ve -= SP_EBIAS; \ 81 vm |= SP_HIDDEN_BIT; \ 82 vc = IEEE754_CLASS_NORM; \ 83 } \ 84 } 85 #define EXPLODEXSP EXPLODESP(x, xc, xs, xe, xm) 86 #define EXPLODEYSP EXPLODESP(y, yc, ys, ye, ym) 87 #define EXPLODEZSP EXPLODESP(z, zc, zs, ze, zm) 88 89 90 #define COMPXDP \ 91 u64 xm; int xe; int xs __maybe_unused; int xc 92 93 #define COMPYDP \ 94 u64 ym; int ye; int ys; int yc 95 96 #define COMPZDP \ 97 u64 zm; int ze; int zs; int zc 98 99 #define EXPLODEDP(v, vc, vs, ve, vm) \ 100 { \ 101 vm = DPMANT(v); \ 102 vs = DPSIGN(v); \ 103 ve = DPBEXP(v); \ 104 if (ve == DP_EMAX+1+DP_EBIAS) { \ 105 if (vm == 0) \ 106 vc = IEEE754_CLASS_INF; \ 107 else if (ieee754_csr.nan2008 ^ !(vm & DP_MBIT(DP_FBITS - 1))) \ 108 vc = IEEE754_CLASS_QNAN; \ 109 else \ 110 vc = IEEE754_CLASS_SNAN; \ 111 } else if (ve == DP_EMIN-1+DP_EBIAS) { \ 112 if (vm) { \ 113 ve = DP_EMIN; \ 114 vc = IEEE754_CLASS_DNORM; \ 115 } else \ 116 vc = IEEE754_CLASS_ZERO; \ 117 } else { \ 118 ve -= DP_EBIAS; \ 119 vm |= DP_HIDDEN_BIT; \ 120 vc = IEEE754_CLASS_NORM; \ 121 } \ 122 } 123 #define EXPLODEXDP EXPLODEDP(x, xc, xs, xe, xm) 124 #define EXPLODEYDP EXPLODEDP(y, yc, ys, ye, ym) 125 #define EXPLODEZDP EXPLODEDP(z, zc, zs, ze, zm) 126 127 #define FLUSHDP(v, vc, vs, ve, vm) \ 128 if (vc==IEEE754_CLASS_DNORM) { \ 129 if (ieee754_csr.nod) { \ 130 ieee754_setcx(IEEE754_INEXACT); \ 131 vc = IEEE754_CLASS_ZERO; \ 132 ve = DP_EMIN-1+DP_EBIAS; \ 133 vm = 0; \ 134 v = ieee754dp_zero(vs); \ 135 } \ 136 } 137 138 #define FLUSHSP(v, vc, vs, ve, vm) \ 139 if (vc==IEEE754_CLASS_DNORM) { \ 140 if (ieee754_csr.nod) { \ 141 ieee754_setcx(IEEE754_INEXACT); \ 142 vc = IEEE754_CLASS_ZERO; \ 143 ve = SP_EMIN-1+SP_EBIAS; \ 144 vm = 0; \ 145 v = ieee754sp_zero(vs); \ 146 } \ 147 } 148 149 #define FLUSHXDP FLUSHDP(x, xc, xs, xe, xm) 150 #define FLUSHYDP FLUSHDP(y, yc, ys, ye, ym) 151 #define FLUSHZDP FLUSHDP(z, zc, zs, ze, zm) 152 #define FLUSHXSP FLUSHSP(x, xc, xs, xe, xm) 153 #define FLUSHYSP FLUSHSP(y, yc, ys, ye, ym) 154 #define FLUSHZSP FLUSHSP(z, zc, zs, ze, zm) 155 156 #endif /* __IEEE754INT_H */ 157