1 /* Temporary library support for decimal floating point. 2 Copyright (C) 2005, 2006 Free Software Foundation, Inc. 3 4 This file is part of GCC. 5 6 GCC is free software; you can redistribute it and/or modify it 7 under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 2, or (at your option) 9 any later version. 10 11 In addition to the permissions in the GNU General Public License, 12 the Free Software Foundation gives you unlimited permission to link 13 the compiled version of this file into combinations with other 14 programs, and to distribute those combinations without any 15 restriction coming from the use of this file. (The General Public 16 License restrictions do apply in other respects; for example, they 17 cover modification of the file, and distribution when not linked 18 into a combine executable.) 19 20 GCC is distributed in the hope that it will be useful, but WITHOUT 21 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 22 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public 23 License for more details. 24 25 You should have received a copy of the GNU General Public License 26 along with GCC; see the file COPYING. If not, write to the Free 27 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 28 02110-1301, USA. */ 29 30 #include "config.h" 31 #include "decContext.h" 32 #include "decimal128.h" 33 #include "decimal64.h" 34 #include "decimal32.h" 35 36 void __host_to_ieee_32 (_Decimal32, decimal32 *); 37 void __host_to_ieee_64 (_Decimal64, decimal64 *); 38 void __host_to_ieee_128 (_Decimal128, decimal128 *); 39 40 extern int isinfd32 (_Decimal32); 41 extern int isinfd64 (_Decimal64); 42 extern int isinfd128 (_Decimal128); 43 extern void __dfp_enable_traps (void); 44 extern void __dfp_raise (int exception __attribute__ ((unused))); 45 46 int 47 isinfd32 (_Decimal32 arg) 48 { 49 decNumber dn; 50 decimal32 d32; 51 52 __host_to_ieee_32 (arg, &d32); 53 decimal32ToNumber (&d32, &dn); 54 return (decNumberIsInfinite (&dn)); 55 } 56 57 int 58 isinfd64 (_Decimal64 arg) 59 { 60 decNumber dn; 61 decimal64 d64; 62 63 __host_to_ieee_64 (arg, &d64); 64 decimal64ToNumber (&d64, &dn); 65 return (decNumberIsInfinite (&dn)); 66 } 67 68 int 69 isinfd128 (_Decimal128 arg) 70 { 71 decNumber dn; 72 decimal128 d128; 73 74 __host_to_ieee_128 (arg, &d128); 75 decimal128ToNumber (&d128, &dn); 76 return (decNumberIsInfinite (&dn)); 77 } 78 79 int __dfp_traps; 80 81 void 82 __dfp_enable_traps (void) 83 { 84 __dfp_traps = 1; 85 } 86 87 void 88 __dfp_raise (int exception __attribute__ ((unused))) 89 { 90 raise (SIGFPE); 91 } 92 93 uint32_t 94 __dec_byte_swap (uint32_t in) 95 { 96 uint32_t out = 0; 97 unsigned char *p = (unsigned char *) &out; 98 union { 99 uint32_t i; 100 unsigned char b[4]; 101 } u; 102 103 u.i = in; 104 p[0] = u.b[3]; 105 p[1] = u.b[2]; 106 p[2] = u.b[1]; 107 p[3] = u.b[0]; 108 109 return out; 110 } 111