1/* Software floating-point emulation. 2 Definitions for IEEE Single Precision. 3 Copyright (C) 1997-2014 Free Software Foundation, Inc. 4 This file is part of the GNU C Library. 5 Contributed by Richard Henderson (rth@cygnus.com), 6 Jakub Jelinek (jj@ultra.linux.cz), 7 David S. Miller (davem@redhat.com) and 8 Peter Maydell (pmaydell@chiark.greenend.org.uk). 9 10 The GNU C Library is free software; you can redistribute it and/or 11 modify it under the terms of the GNU Lesser General Public 12 License as published by the Free Software Foundation; either 13 version 2.1 of the License, or (at your option) any later version. 14 15 In addition to the permissions in the GNU Lesser General Public 16 License, the Free Software Foundation gives you unlimited 17 permission to link the compiled version of this file into 18 combinations with other programs, and to distribute those 19 combinations without any restriction coming from the use of this 20 file. (The Lesser General Public License restrictions do apply in 21 other respects; for example, they cover modification of the file, 22 and distribution when not linked into a combine executable.) 23 24 The GNU C Library is distributed in the hope that it will be useful, 25 but WITHOUT ANY WARRANTY; without even the implied warranty of 26 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 27 Lesser General Public License for more details. 28 29 You should have received a copy of the GNU Lesser General Public 30 License along with the GNU C Library; if not, see 31 <http://www.gnu.org/licenses/>. */ 32 33#if _FP_W_TYPE_SIZE < 32 34# error "Here's a nickel kid. Go buy yourself a real computer." 35#endif 36 37#define _FP_FRACTBITS_S _FP_W_TYPE_SIZE 38 39#if _FP_W_TYPE_SIZE < 64 40# define _FP_FRACTBITS_DW_S (2 * _FP_W_TYPE_SIZE) 41#else 42# define _FP_FRACTBITS_DW_S _FP_W_TYPE_SIZE 43#endif 44 45#define _FP_FRACBITS_S 24 46#define _FP_FRACXBITS_S (_FP_FRACTBITS_S - _FP_FRACBITS_S) 47#define _FP_WFRACBITS_S (_FP_WORKBITS + _FP_FRACBITS_S) 48#define _FP_WFRACXBITS_S (_FP_FRACTBITS_S - _FP_WFRACBITS_S) 49#define _FP_EXPBITS_S 8 50#define _FP_EXPBIAS_S 127 51#define _FP_EXPMAX_S 255 52#define _FP_QNANBIT_S ((_FP_W_TYPE) 1 << (_FP_FRACBITS_S-2)) 53#define _FP_QNANBIT_SH_S ((_FP_W_TYPE) 1 << (_FP_FRACBITS_S-2+_FP_WORKBITS)) 54#define _FP_IMPLBIT_S ((_FP_W_TYPE) 1 << (_FP_FRACBITS_S-1)) 55#define _FP_IMPLBIT_SH_S ((_FP_W_TYPE) 1 << (_FP_FRACBITS_S-1+_FP_WORKBITS)) 56#define _FP_OVERFLOW_S ((_FP_W_TYPE) 1 << (_FP_WFRACBITS_S)) 57 58#define _FP_WFRACBITS_DW_S (2 * _FP_WFRACBITS_S) 59#define _FP_WFRACXBITS_DW_S (_FP_FRACTBITS_DW_S - _FP_WFRACBITS_DW_S) 60#define _FP_HIGHBIT_DW_S \ 61 ((_FP_W_TYPE) 1 << (_FP_WFRACBITS_DW_S - 1) % _FP_W_TYPE_SIZE) 62 63/* The implementation of _FP_MUL_MEAT_S and _FP_DIV_MEAT_S should be 64 chosen by the target machine. */ 65 66typedef float SFtype __attribute__ ((mode (SF))); 67 68union _FP_UNION_S 69{ 70 SFtype flt; 71 struct _FP_STRUCT_LAYOUT 72 { 73#if __BYTE_ORDER == __BIG_ENDIAN 74 unsigned sign : 1; 75 unsigned exp : _FP_EXPBITS_S; 76 unsigned frac : _FP_FRACBITS_S - (_FP_IMPLBIT_S != 0); 77#else 78 unsigned frac : _FP_FRACBITS_S - (_FP_IMPLBIT_S != 0); 79 unsigned exp : _FP_EXPBITS_S; 80 unsigned sign : 1; 81#endif 82 } bits __attribute__ ((packed)); 83}; 84 85#define FP_DECL_S(X) _FP_DECL (1, X) 86#define FP_UNPACK_RAW_S(X, val) _FP_UNPACK_RAW_1 (S, X, (val)) 87#define FP_UNPACK_RAW_SP(X, val) _FP_UNPACK_RAW_1_P (S, X, (val)) 88#define FP_PACK_RAW_S(val, X) _FP_PACK_RAW_1 (S, (val), X) 89#define FP_PACK_RAW_SP(val, X) \ 90 do \ 91 { \ 92 if (!FP_INHIBIT_RESULTS) \ 93 _FP_PACK_RAW_1_P (S, (val), X); \ 94 } \ 95 while (0) 96 97#define FP_UNPACK_S(X, val) \ 98 do \ 99 { \ 100 _FP_UNPACK_RAW_1 (S, X, (val)); \ 101 _FP_UNPACK_CANONICAL (S, 1, X); \ 102 } \ 103 while (0) 104 105#define FP_UNPACK_SP(X, val) \ 106 do \ 107 { \ 108 _FP_UNPACK_RAW_1_P (S, X, (val)); \ 109 _FP_UNPACK_CANONICAL (S, 1, X); \ 110 } \ 111 while (0) 112 113#define FP_UNPACK_SEMIRAW_S(X, val) \ 114 do \ 115 { \ 116 _FP_UNPACK_RAW_1 (S, X, (val)); \ 117 _FP_UNPACK_SEMIRAW (S, 1, X); \ 118 } \ 119 while (0) 120 121#define FP_UNPACK_SEMIRAW_SP(X, val) \ 122 do \ 123 { \ 124 _FP_UNPACK_RAW_1_P (S, X, (val)); \ 125 _FP_UNPACK_SEMIRAW (S, 1, X); \ 126 } \ 127 while (0) 128 129#define FP_PACK_S(val, X) \ 130 do \ 131 { \ 132 _FP_PACK_CANONICAL (S, 1, X); \ 133 _FP_PACK_RAW_1 (S, (val), X); \ 134 } \ 135 while (0) 136 137#define FP_PACK_SP(val, X) \ 138 do \ 139 { \ 140 _FP_PACK_CANONICAL (S, 1, X); \ 141 if (!FP_INHIBIT_RESULTS) \ 142 _FP_PACK_RAW_1_P (S, (val), X); \ 143 } \ 144 while (0) 145 146#define FP_PACK_SEMIRAW_S(val, X) \ 147 do \ 148 { \ 149 _FP_PACK_SEMIRAW (S, 1, X); \ 150 _FP_PACK_RAW_1 (S, (val), X); \ 151 } \ 152 while (0) 153 154#define FP_PACK_SEMIRAW_SP(val, X) \ 155 do \ 156 { \ 157 _FP_PACK_SEMIRAW (S, 1, X); \ 158 if (!FP_INHIBIT_RESULTS) \ 159 _FP_PACK_RAW_1_P (S, (val), X); \ 160 } \ 161 while (0) 162 163#define FP_ISSIGNAN_S(X) _FP_ISSIGNAN (S, 1, X) 164#define FP_NEG_S(R, X) _FP_NEG (S, 1, R, X) 165#define FP_ADD_S(R, X, Y) _FP_ADD (S, 1, R, X, Y) 166#define FP_SUB_S(R, X, Y) _FP_SUB (S, 1, R, X, Y) 167#define FP_MUL_S(R, X, Y) _FP_MUL (S, 1, R, X, Y) 168#define FP_DIV_S(R, X, Y) _FP_DIV (S, 1, R, X, Y) 169#define FP_SQRT_S(R, X) _FP_SQRT (S, 1, R, X) 170#define _FP_SQRT_MEAT_S(R, S, T, X, Q) _FP_SQRT_MEAT_1 (R, S, T, X, (Q)) 171 172#if _FP_W_TYPE_SIZE < 64 173# define FP_FMA_S(R, X, Y, Z) _FP_FMA (S, 1, 2, R, X, Y, Z) 174#else 175# define FP_FMA_S(R, X, Y, Z) _FP_FMA (S, 1, 1, R, X, Y, Z) 176#endif 177 178#define FP_CMP_S(r, X, Y, un, ex) _FP_CMP (S, 1, (r), X, Y, (un), (ex)) 179#define FP_CMP_EQ_S(r, X, Y, ex) _FP_CMP_EQ (S, 1, (r), X, Y, (ex)) 180#define FP_CMP_UNORD_S(r, X, Y, ex) _FP_CMP_UNORD (S, 1, (r), X, Y, (ex)) 181 182#define FP_TO_INT_S(r, X, rsz, rsg) _FP_TO_INT (S, 1, (r), X, (rsz), (rsg)) 183#define FP_FROM_INT_S(X, r, rs, rt) _FP_FROM_INT (S, 1, X, (r), (rs), rt) 184 185#define _FP_FRAC_HIGH_S(X) _FP_FRAC_HIGH_1 (X) 186#define _FP_FRAC_HIGH_RAW_S(X) _FP_FRAC_HIGH_1 (X) 187 188#if _FP_W_TYPE_SIZE < 64 189# define _FP_FRAC_HIGH_DW_S(X) _FP_FRAC_HIGH_2 (X) 190#else 191# define _FP_FRAC_HIGH_DW_S(X) _FP_FRAC_HIGH_1 (X) 192#endif 193