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 #define COMPXSP \ 48 unsigned xm; int xe; int xs __maybe_unused; int xc 49 50 #define COMPYSP \ 51 unsigned ym; int ye; int ys; int yc 52 53 #define EXPLODESP(v, vc, vs, ve, vm) \ 54 { \ 55 vs = SPSIGN(v); \ 56 ve = SPBEXP(v); \ 57 vm = SPMANT(v); \ 58 if (ve == SP_EMAX+1+SP_EBIAS) { \ 59 if (vm == 0) \ 60 vc = IEEE754_CLASS_INF; \ 61 else if (vm & SP_MBIT(SP_FBITS-1)) \ 62 vc = IEEE754_CLASS_SNAN; \ 63 else \ 64 vc = IEEE754_CLASS_QNAN; \ 65 } else if (ve == SP_EMIN-1+SP_EBIAS) { \ 66 if (vm) { \ 67 ve = SP_EMIN; \ 68 vc = IEEE754_CLASS_DNORM; \ 69 } else \ 70 vc = IEEE754_CLASS_ZERO; \ 71 } else { \ 72 ve -= SP_EBIAS; \ 73 vm |= SP_HIDDEN_BIT; \ 74 vc = IEEE754_CLASS_NORM; \ 75 } \ 76 } 77 #define EXPLODEXSP EXPLODESP(x, xc, xs, xe, xm) 78 #define EXPLODEYSP EXPLODESP(y, yc, ys, ye, ym) 79 80 81 #define COMPXDP \ 82 u64 xm; int xe; int xs __maybe_unused; int xc 83 84 #define COMPYDP \ 85 u64 ym; int ye; int ys; int yc 86 87 #define EXPLODEDP(v, vc, vs, ve, vm) \ 88 { \ 89 vm = DPMANT(v); \ 90 vs = DPSIGN(v); \ 91 ve = DPBEXP(v); \ 92 if (ve == DP_EMAX+1+DP_EBIAS) { \ 93 if (vm == 0) \ 94 vc = IEEE754_CLASS_INF; \ 95 else if (vm & DP_MBIT(DP_FBITS-1)) \ 96 vc = IEEE754_CLASS_SNAN; \ 97 else \ 98 vc = IEEE754_CLASS_QNAN; \ 99 } else if (ve == DP_EMIN-1+DP_EBIAS) { \ 100 if (vm) { \ 101 ve = DP_EMIN; \ 102 vc = IEEE754_CLASS_DNORM; \ 103 } else \ 104 vc = IEEE754_CLASS_ZERO; \ 105 } else { \ 106 ve -= DP_EBIAS; \ 107 vm |= DP_HIDDEN_BIT; \ 108 vc = IEEE754_CLASS_NORM; \ 109 } \ 110 } 111 #define EXPLODEXDP EXPLODEDP(x, xc, xs, xe, xm) 112 #define EXPLODEYDP EXPLODEDP(y, yc, ys, ye, ym) 113 114 #define FLUSHDP(v, vc, vs, ve, vm) \ 115 if (vc==IEEE754_CLASS_DNORM) { \ 116 if (ieee754_csr.nod) { \ 117 ieee754_setcx(IEEE754_INEXACT); \ 118 vc = IEEE754_CLASS_ZERO; \ 119 ve = DP_EMIN-1+DP_EBIAS; \ 120 vm = 0; \ 121 v = ieee754dp_zero(vs); \ 122 } \ 123 } 124 125 #define FLUSHSP(v, vc, vs, ve, vm) \ 126 if (vc==IEEE754_CLASS_DNORM) { \ 127 if (ieee754_csr.nod) { \ 128 ieee754_setcx(IEEE754_INEXACT); \ 129 vc = IEEE754_CLASS_ZERO; \ 130 ve = SP_EMIN-1+SP_EBIAS; \ 131 vm = 0; \ 132 v = ieee754sp_zero(vs); \ 133 } \ 134 } 135 136 #define FLUSHXDP FLUSHDP(x, xc, xs, xe, xm) 137 #define FLUSHYDP FLUSHDP(y, yc, ys, ye, ym) 138 #define FLUSHXSP FLUSHSP(x, xc, xs, xe, xm) 139 #define FLUSHYSP FLUSHSP(y, yc, ys, ye, ym) 140 141 #endif /* __IEEE754INT_H */ 142