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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 | /* Software floating-point emulation. Definitions for IEEE Double Precision Copyright (C) 1997,1998,1999 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Richard Henderson (rth@cygnus.com), Jakub Jelinek (jj@ultra.linux.cz), David S. Miller (davem@redhat.com) and Peter Maydell (pmaydell@chiark.greenend.org.uk). The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with the GNU C Library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #ifndef __MATH_EMU_DOUBLE_H__ #define __MATH_EMU_DOUBLE_H__ #if _FP_W_TYPE_SIZE < 32 #error "Here's a nickel kid. Go buy yourself a real computer." #endif #if _FP_W_TYPE_SIZE < 64 #define _FP_FRACTBITS_D (2 * _FP_W_TYPE_SIZE) #else #define _FP_FRACTBITS_D _FP_W_TYPE_SIZE #endif #define _FP_FRACBITS_D 53 #define _FP_FRACXBITS_D (_FP_FRACTBITS_D - _FP_FRACBITS_D) #define _FP_WFRACBITS_D (_FP_WORKBITS + _FP_FRACBITS_D) #define _FP_WFRACXBITS_D (_FP_FRACTBITS_D - _FP_WFRACBITS_D) #define _FP_EXPBITS_D 11 #define _FP_EXPBIAS_D 1023 #define _FP_EXPMAX_D 2047 #define _FP_QNANBIT_D \ ((_FP_W_TYPE)1 << (_FP_FRACBITS_D-2) % _FP_W_TYPE_SIZE) #define _FP_IMPLBIT_D \ ((_FP_W_TYPE)1 << (_FP_FRACBITS_D-1) % _FP_W_TYPE_SIZE) #define _FP_OVERFLOW_D \ ((_FP_W_TYPE)1 << _FP_WFRACBITS_D % _FP_W_TYPE_SIZE) #if _FP_W_TYPE_SIZE < 64 union _FP_UNION_D { double flt; struct { #if __BYTE_ORDER == __BIG_ENDIAN unsigned sign : 1; unsigned exp : _FP_EXPBITS_D; unsigned frac1 : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0) - _FP_W_TYPE_SIZE; unsigned frac0 : _FP_W_TYPE_SIZE; #else unsigned frac0 : _FP_W_TYPE_SIZE; unsigned frac1 : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0) - _FP_W_TYPE_SIZE; unsigned exp : _FP_EXPBITS_D; unsigned sign : 1; #endif } bits __attribute__((packed)); }; #define FP_DECL_D(X) _FP_DECL(2,X) #define FP_UNPACK_RAW_D(X,val) _FP_UNPACK_RAW_2(D,X,val) #define FP_UNPACK_RAW_DP(X,val) _FP_UNPACK_RAW_2_P(D,X,val) #define FP_PACK_RAW_D(val,X) _FP_PACK_RAW_2(D,val,X) #define FP_PACK_RAW_DP(val,X) \ do { \ if (!FP_INHIBIT_RESULTS) \ _FP_PACK_RAW_2_P(D,val,X); \ } while (0) #define FP_UNPACK_D(X,val) \ do { \ _FP_UNPACK_RAW_2(D,X,val); \ _FP_UNPACK_CANONICAL(D,2,X); \ } while (0) #define FP_UNPACK_DP(X,val) \ do { \ _FP_UNPACK_RAW_2_P(D,X,val); \ _FP_UNPACK_CANONICAL(D,2,X); \ } while (0) #define FP_PACK_D(val,X) \ do { \ _FP_PACK_CANONICAL(D,2,X); \ _FP_PACK_RAW_2(D,val,X); \ } while (0) #define FP_PACK_DP(val,X) \ do { \ _FP_PACK_CANONICAL(D,2,X); \ if (!FP_INHIBIT_RESULTS) \ _FP_PACK_RAW_2_P(D,val,X); \ } while (0) #define FP_ISSIGNAN_D(X) _FP_ISSIGNAN(D,2,X) #define FP_NEG_D(R,X) _FP_NEG(D,2,R,X) #define FP_ADD_D(R,X,Y) _FP_ADD(D,2,R,X,Y) #define FP_SUB_D(R,X,Y) _FP_SUB(D,2,R,X,Y) #define FP_MUL_D(R,X,Y) _FP_MUL(D,2,R,X,Y) #define FP_DIV_D(R,X,Y) _FP_DIV(D,2,R,X,Y) #define FP_SQRT_D(R,X) _FP_SQRT(D,2,R,X) #define _FP_SQRT_MEAT_D(R,S,T,X,Q) _FP_SQRT_MEAT_2(R,S,T,X,Q) #define FP_CMP_D(r,X,Y,un) _FP_CMP(D,2,r,X,Y,un) #define FP_CMP_EQ_D(r,X,Y) _FP_CMP_EQ(D,2,r,X,Y) #define FP_TO_INT_D(r,X,rsz,rsg) _FP_TO_INT(D,2,r,X,rsz,rsg) #define FP_TO_INT_ROUND_D(r,X,rsz,rsg) _FP_TO_INT_ROUND(D,2,r,X,rsz,rsg) #define FP_FROM_INT_D(X,r,rs,rt) _FP_FROM_INT(D,2,X,r,rs,rt) #define _FP_FRAC_HIGH_D(X) _FP_FRAC_HIGH_2(X) #define _FP_FRAC_HIGH_RAW_D(X) _FP_FRAC_HIGH_2(X) #else union _FP_UNION_D { double flt; struct { #if __BYTE_ORDER == __BIG_ENDIAN unsigned sign : 1; unsigned exp : _FP_EXPBITS_D; unsigned long frac : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0); #else unsigned long frac : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0); unsigned exp : _FP_EXPBITS_D; unsigned sign : 1; #endif } bits __attribute__((packed)); }; #define FP_DECL_D(X) _FP_DECL(1,X) #define FP_UNPACK_RAW_D(X,val) _FP_UNPACK_RAW_1(D,X,val) #define FP_UNPACK_RAW_DP(X,val) _FP_UNPACK_RAW_1_P(D,X,val) #define FP_PACK_RAW_D(val,X) _FP_PACK_RAW_1(D,val,X) #define FP_PACK_RAW_DP(val,X) \ do { \ if (!FP_INHIBIT_RESULTS) \ _FP_PACK_RAW_1_P(D,val,X); \ } while (0) #define FP_UNPACK_D(X,val) \ do { \ _FP_UNPACK_RAW_1(D,X,val); \ _FP_UNPACK_CANONICAL(D,1,X); \ } while (0) #define FP_UNPACK_DP(X,val) \ do { \ _FP_UNPACK_RAW_1_P(D,X,val); \ _FP_UNPACK_CANONICAL(D,1,X); \ } while (0) #define FP_PACK_D(val,X) \ do { \ _FP_PACK_CANONICAL(D,1,X); \ _FP_PACK_RAW_1(D,val,X); \ } while (0) #define FP_PACK_DP(val,X) \ do { \ _FP_PACK_CANONICAL(D,1,X); \ if (!FP_INHIBIT_RESULTS) \ _FP_PACK_RAW_1_P(D,val,X); \ } while (0) #define FP_ISSIGNAN_D(X) _FP_ISSIGNAN(D,1,X) #define FP_NEG_D(R,X) _FP_NEG(D,1,R,X) #define FP_ADD_D(R,X,Y) _FP_ADD(D,1,R,X,Y) #define FP_SUB_D(R,X,Y) _FP_SUB(D,1,R,X,Y) #define FP_MUL_D(R,X,Y) _FP_MUL(D,1,R,X,Y) #define FP_DIV_D(R,X,Y) _FP_DIV(D,1,R,X,Y) #define FP_SQRT_D(R,X) _FP_SQRT(D,1,R,X) #define _FP_SQRT_MEAT_D(R,S,T,X,Q) _FP_SQRT_MEAT_1(R,S,T,X,Q) /* The implementation of _FP_MUL_D and _FP_DIV_D should be chosen by the target machine. */ #define FP_CMP_D(r,X,Y,un) _FP_CMP(D,1,r,X,Y,un) #define FP_CMP_EQ_D(r,X,Y) _FP_CMP_EQ(D,1,r,X,Y) #define FP_TO_INT_D(r,X,rsz,rsg) _FP_TO_INT(D,1,r,X,rsz,rsg) #define FP_TO_INT_ROUND_D(r,X,rsz,rsg) _FP_TO_INT_ROUND(D,1,r,X,rsz,rsg) #define FP_FROM_INT_D(X,r,rs,rt) _FP_FROM_INT(D,1,X,r,rs,rt) #define _FP_FRAC_HIGH_D(X) _FP_FRAC_HIGH_1(X) #define _FP_FRAC_HIGH_RAW_D(X) _FP_FRAC_HIGH_1(X) #endif /* W_TYPE_SIZE < 64 */ #endif /* __MATH_EMU_DOUBLE_H__ */ |