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 enum maddf_flags { 30 MADDF_NEGATE_PRODUCT = 1 << 0, 31 }; 32 33 static inline void ieee754_clearcx(void) 34 { 35 ieee754_csr.cx = 0; 36 } 37 38 static inline void ieee754_setcx(const unsigned int flags) 39 { 40 ieee754_csr.cx |= flags; 41 ieee754_csr.sx |= flags; 42 } 43 44 static inline int ieee754_setandtestcx(const unsigned int x) 45 { 46 ieee754_setcx(x); 47 48 return ieee754_csr.mx & x; 49 } 50 51 static inline int ieee754_class_nan(int xc) 52 { 53 return xc >= IEEE754_CLASS_SNAN; 54 } 55 56 #define COMPXSP \ 57 unsigned int xm; int xe; int xs __maybe_unused; int xc 58 59 #define COMPYSP \ 60 unsigned int ym; int ye; int ys; int yc 61 62 #define COMPZSP \ 63 unsigned int zm; int ze; int zs; int zc 64 65 #define EXPLODESP(v, vc, vs, ve, vm) \ 66 { \ 67 vs = SPSIGN(v); \ 68 ve = SPBEXP(v); \ 69 vm = SPMANT(v); \ 70 if (ve == SP_EMAX+1+SP_EBIAS) { \ 71 if (vm == 0) \ 72 vc = IEEE754_CLASS_INF; \ 73 else if (ieee754_csr.nan2008 ^ !(vm & SP_MBIT(SP_FBITS - 1))) \ 74 vc = IEEE754_CLASS_QNAN; \ 75 else \ 76 vc = IEEE754_CLASS_SNAN; \ 77 } else if (ve == SP_EMIN-1+SP_EBIAS) { \ 78 if (vm) { \ 79 ve = SP_EMIN; \ 80 vc = IEEE754_CLASS_DNORM; \ 81 } else \ 82 vc = IEEE754_CLASS_ZERO; \ 83 } else { \ 84 ve -= SP_EBIAS; \ 85 vm |= SP_HIDDEN_BIT; \ 86 vc = IEEE754_CLASS_NORM; \ 87 } \ 88 } 89 #define EXPLODEXSP EXPLODESP(x, xc, xs, xe, xm) 90 #define EXPLODEYSP EXPLODESP(y, yc, ys, ye, ym) 91 #define EXPLODEZSP EXPLODESP(z, zc, zs, ze, zm) 92 93 94 #define COMPXDP \ 95 u64 xm; int xe; int xs __maybe_unused; int xc 96 97 #define COMPYDP \ 98 u64 ym; int ye; int ys; int yc 99 100 #define COMPZDP \ 101 u64 zm; int ze; int zs; int zc 102 103 #define EXPLODEDP(v, vc, vs, ve, vm) \ 104 { \ 105 vm = DPMANT(v); \ 106 vs = DPSIGN(v); \ 107 ve = DPBEXP(v); \ 108 if (ve == DP_EMAX+1+DP_EBIAS) { \ 109 if (vm == 0) \ 110 vc = IEEE754_CLASS_INF; \ 111 else if (ieee754_csr.nan2008 ^ !(vm & DP_MBIT(DP_FBITS - 1))) \ 112 vc = IEEE754_CLASS_QNAN; \ 113 else \ 114 vc = IEEE754_CLASS_SNAN; \ 115 } else if (ve == DP_EMIN-1+DP_EBIAS) { \ 116 if (vm) { \ 117 ve = DP_EMIN; \ 118 vc = IEEE754_CLASS_DNORM; \ 119 } else \ 120 vc = IEEE754_CLASS_ZERO; \ 121 } else { \ 122 ve -= DP_EBIAS; \ 123 vm |= DP_HIDDEN_BIT; \ 124 vc = IEEE754_CLASS_NORM; \ 125 } \ 126 } 127 #define EXPLODEXDP EXPLODEDP(x, xc, xs, xe, xm) 128 #define EXPLODEYDP EXPLODEDP(y, yc, ys, ye, ym) 129 #define EXPLODEZDP EXPLODEDP(z, zc, zs, ze, zm) 130 131 #define FLUSHDP(v, vc, vs, ve, vm) \ 132 if (vc==IEEE754_CLASS_DNORM) { \ 133 if (ieee754_csr.nod) { \ 134 ieee754_setcx(IEEE754_INEXACT); \ 135 vc = IEEE754_CLASS_ZERO; \ 136 ve = DP_EMIN-1+DP_EBIAS; \ 137 vm = 0; \ 138 v = ieee754dp_zero(vs); \ 139 } \ 140 } 141 142 #define FLUSHSP(v, vc, vs, ve, vm) \ 143 if (vc==IEEE754_CLASS_DNORM) { \ 144 if (ieee754_csr.nod) { \ 145 ieee754_setcx(IEEE754_INEXACT); \ 146 vc = IEEE754_CLASS_ZERO; \ 147 ve = SP_EMIN-1+SP_EBIAS; \ 148 vm = 0; \ 149 v = ieee754sp_zero(vs); \ 150 } \ 151 } 152 153 #define FLUSHXDP FLUSHDP(x, xc, xs, xe, xm) 154 #define FLUSHYDP FLUSHDP(y, yc, ys, ye, ym) 155 #define FLUSHZDP FLUSHDP(z, zc, zs, ze, zm) 156 #define FLUSHXSP FLUSHSP(x, xc, xs, xe, xm) 157 #define FLUSHYSP FLUSHSP(y, yc, ys, ye, ym) 158 #define FLUSHZSP FLUSHSP(z, zc, zs, ze, zm) 159 160 #endif /* __IEEE754INT_H */ 161