1 /* Software floating-point emulation. 2 Definitions for IEEE Single Precision. 3 Copyright (C) 1997,1998,1999,2006 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 #define _FP_FRACBITS_S 24 40 #define _FP_FRACXBITS_S (_FP_FRACTBITS_S - _FP_FRACBITS_S) 41 #define _FP_WFRACBITS_S (_FP_WORKBITS + _FP_FRACBITS_S) 42 #define _FP_WFRACXBITS_S (_FP_FRACTBITS_S - _FP_WFRACBITS_S) 43 #define _FP_EXPBITS_S 8 44 #define _FP_EXPBIAS_S 127 45 #define _FP_EXPMAX_S 255 46 #define _FP_QNANBIT_S ((_FP_W_TYPE)1 << (_FP_FRACBITS_S-2)) 47 #define _FP_QNANBIT_SH_S ((_FP_W_TYPE)1 << (_FP_FRACBITS_S-2+_FP_WORKBITS)) 48 #define _FP_IMPLBIT_S ((_FP_W_TYPE)1 << (_FP_FRACBITS_S-1)) 49 #define _FP_IMPLBIT_SH_S ((_FP_W_TYPE)1 << (_FP_FRACBITS_S-1+_FP_WORKBITS)) 50 #define _FP_OVERFLOW_S ((_FP_W_TYPE)1 << (_FP_WFRACBITS_S)) 51 52 /* The implementation of _FP_MUL_MEAT_S and _FP_DIV_MEAT_S should be 53 chosen by the target machine. */ 54 55 typedef float SFtype __attribute__((mode(SF))); 56 57 union _FP_UNION_S 58 { 59 SFtype flt; 60 struct { 61 #if __BYTE_ORDER == __BIG_ENDIAN 62 unsigned sign : 1; 63 unsigned exp : _FP_EXPBITS_S; 64 unsigned frac : _FP_FRACBITS_S - (_FP_IMPLBIT_S != 0); 65 #else 66 unsigned frac : _FP_FRACBITS_S - (_FP_IMPLBIT_S != 0); 67 unsigned exp : _FP_EXPBITS_S; 68 unsigned sign : 1; 69 #endif 70 } bits __attribute__((packed)); 71 }; 72 73 #define FP_DECL_S(X) _FP_DECL(1,X) 74 #define FP_UNPACK_RAW_S(X,val) _FP_UNPACK_RAW_1(S,X,val) 75 #define FP_UNPACK_RAW_SP(X,val) _FP_UNPACK_RAW_1_P(S,X,val) 76 #define FP_PACK_RAW_S(val,X) _FP_PACK_RAW_1(S,val,X) 77 #define FP_PACK_RAW_SP(val,X) \ 78 do { \ 79 if (!FP_INHIBIT_RESULTS) \ 80 _FP_PACK_RAW_1_P(S,val,X); \ 81 } while (0) 82 83 #define FP_UNPACK_S(X,val) \ 84 do { \ 85 _FP_UNPACK_RAW_1(S,X,val); \ 86 _FP_UNPACK_CANONICAL(S,1,X); \ 87 } while (0) 88 89 #define FP_UNPACK_SP(X,val) \ 90 do { \ 91 _FP_UNPACK_RAW_1_P(S,X,val); \ 92 _FP_UNPACK_CANONICAL(S,1,X); \ 93 } while (0) 94 95 #define FP_UNPACK_SEMIRAW_S(X,val) \ 96 do { \ 97 _FP_UNPACK_RAW_1(S,X,val); \ 98 _FP_UNPACK_SEMIRAW(S,1,X); \ 99 } while (0) 100 101 #define FP_UNPACK_SEMIRAW_SP(X,val) \ 102 do { \ 103 _FP_UNPACK_RAW_1_P(S,X,val); \ 104 _FP_UNPACK_SEMIRAW(S,1,X); \ 105 } while (0) 106 107 #define FP_PACK_S(val,X) \ 108 do { \ 109 _FP_PACK_CANONICAL(S,1,X); \ 110 _FP_PACK_RAW_1(S,val,X); \ 111 } while (0) 112 113 #define FP_PACK_SP(val,X) \ 114 do { \ 115 _FP_PACK_CANONICAL(S,1,X); \ 116 if (!FP_INHIBIT_RESULTS) \ 117 _FP_PACK_RAW_1_P(S,val,X); \ 118 } while (0) 119 120 #define FP_PACK_SEMIRAW_S(val,X) \ 121 do { \ 122 _FP_PACK_SEMIRAW(S,1,X); \ 123 _FP_PACK_RAW_1(S,val,X); \ 124 } while (0) 125 126 #define FP_PACK_SEMIRAW_SP(val,X) \ 127 do { \ 128 _FP_PACK_SEMIRAW(S,1,X); \ 129 if (!FP_INHIBIT_RESULTS) \ 130 _FP_PACK_RAW_1_P(S,val,X); \ 131 } while (0) 132 133 #define FP_ISSIGNAN_S(X) _FP_ISSIGNAN(S,1,X) 134 #define FP_NEG_S(R,X) _FP_NEG(S,1,R,X) 135 #define FP_ADD_S(R,X,Y) _FP_ADD(S,1,R,X,Y) 136 #define FP_SUB_S(R,X,Y) _FP_SUB(S,1,R,X,Y) 137 #define FP_MUL_S(R,X,Y) _FP_MUL(S,1,R,X,Y) 138 #define FP_DIV_S(R,X,Y) _FP_DIV(S,1,R,X,Y) 139 #define FP_SQRT_S(R,X) _FP_SQRT(S,1,R,X) 140 #define _FP_SQRT_MEAT_S(R,S,T,X,Q) _FP_SQRT_MEAT_1(R,S,T,X,Q) 141 142 #define FP_CMP_S(r,X,Y,un) _FP_CMP(S,1,r,X,Y,un) 143 #define FP_CMP_EQ_S(r,X,Y) _FP_CMP_EQ(S,1,r,X,Y) 144 #define FP_CMP_UNORD_S(r,X,Y) _FP_CMP_UNORD(S,1,r,X,Y) 145 146 #define FP_TO_INT_S(r,X,rsz,rsg) _FP_TO_INT(S,1,r,X,rsz,rsg) 147 #define FP_FROM_INT_S(X,r,rs,rt) _FP_FROM_INT(S,1,X,r,rs,rt) 148 149 #define _FP_FRAC_HIGH_S(X) _FP_FRAC_HIGH_1(X) 150 #define _FP_FRAC_HIGH_RAW_S(X) _FP_FRAC_HIGH_1(X) 151