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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 | /* * IEEE754 floating point * common internal header file */ /* * MIPS floating point support * Copyright (C) 1994-2000 Algorithmics Ltd. All rights reserved. * http://www.algor.co.uk * * ######################################################################## * * 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., * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. * * ######################################################################## */ #include "ieee754.h" #define DP_EBIAS 1023 #define DP_EMIN (-1022) #define DP_EMAX 1023 #define DP_MBITS 52 #define SP_EBIAS 127 #define SP_EMIN (-126) #define SP_EMAX 127 #define SP_MBITS 23 #define DP_MBIT(x) ((unsigned long long)1 << (x)) #define DP_HIDDEN_BIT DP_MBIT(DP_MBITS) #define DP_SIGN_BIT DP_MBIT(63) #define SP_MBIT(x) ((unsigned long)1 << (x)) #define SP_HIDDEN_BIT SP_MBIT(SP_MBITS) #define SP_SIGN_BIT SP_MBIT(31) #define SPSIGN(sp) (sp.parts.sign) #define SPBEXP(sp) (sp.parts.bexp) #define SPMANT(sp) (sp.parts.mant) #define DPSIGN(dp) (dp.parts.sign) #define DPBEXP(dp) (dp.parts.bexp) #define DPMANT(dp) (dp.parts.mant) #define CLPAIR(x,y) ((x)*6+(y)) #define CLEARCX \ (ieee754_csr.cx = 0) #define SETCX(x) \ (ieee754_csr.cx |= (x),ieee754_csr.sx |= (x),ieee754_csr.mx & (x)) #define TSTX() \ (ieee754_csr.cx & ieee754_csr.mx) #define COMPXSP \ unsigned xm; int xe; int xs; 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_MBITS-1)) \ vc = IEEE754_CLASS_QNAN;\ else \ vc = IEEE754_CLASS_SNAN;\ } 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 \ unsigned long long xm; int xe; int xs; int xc #define COMPYDP \ unsigned long long 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_MBITS-1)) \ vc = IEEE754_CLASS_QNAN;\ else \ vc = IEEE754_CLASS_SNAN;\ } 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) |