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1 /* Copyright (C) 2007-2020 Free Software Foundation, Inc.
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2
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3 This file is part of GCC.
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4
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5 GCC is free software; you can redistribute it and/or modify it under
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6 the terms of the GNU General Public License as published by the Free
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7 Software Foundation; either version 3, or (at your option) any later
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8 version.
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9
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10 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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11 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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13 for more details.
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14
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15 Under Section 7 of GPL version 3, you are granted additional
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16 permissions described in the GCC Runtime Library Exception, version
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17 3.1, as published by the Free Software Foundation.
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18
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19 You should have received a copy of the GNU General Public License and
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20 a copy of the GCC Runtime Library Exception along with this program;
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21 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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22 <http://www.gnu.org/licenses/>. */
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23
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24 #define decimal64FromString __dpd64FromString
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25 #define decimal64ToString __dpd64ToString
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26 #define decimal64ToEngString __dpd64ToEngString
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27 #define decimal64FromNumber __dpd64FromNumber
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28 #define decimal64ToNumber __dpd64ToNumber
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29
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30 #include "dpd/decimal64.c"
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31
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32 #undef decimal64FromString
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33 #undef decimal64ToString
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34 #undef decimal64ToEngString
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35 #undef decimal64FromNumber
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36 #undef decimal64ToNumber
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37
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38 #include "bid-dpd.h"
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39
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40 #ifdef IN_LIBGCC2
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41 #define decimal64FromString __decimal64FromString
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42 #define decimal64ToString __decimal64ToString
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43 #define decimal64ToEngString __decimal64ToEngString
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44 #define decimal64FromNumber __decimal64FromNumber
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45 #define decimal64ToNumber __decimal64ToNumber
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46 #endif
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47
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48 decimal64 *decimal64FromString (decimal64 *, const char *, decContext *);
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49 char *decimal64ToString (const decimal64 *, char *);
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50 char *decimal64ToEngString (const decimal64 *, char *);
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51 decimal64 *decimal64FromNumber (decimal64 *, const decNumber *, decContext *);
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52 decNumber *decimal64ToNumber (const decimal64 *, decNumber *);
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53
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54 void __host_to_ieee_64 (_Decimal64 in, decimal64 *out);
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55 void __ieee_to_host_64 (decimal64 in, _Decimal64 *out);
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56
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57 decimal64 *
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58 decimal64FromNumber (decimal64 *d64, const decNumber *dn,
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59 decContext *set)
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60 {
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61 /* decimal64 and _Decimal64 are different types. */
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62 union
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63 {
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64 _Decimal64 _Dec;
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65 decimal64 dec;
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66 } u;
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67
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68 __dpd64FromNumber (d64, dn, set);
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69
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70 /* __dpd64FromNumber returns in big endian. But _dpd_to_bid64 takes
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71 host endian. */
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72 __ieee_to_host_64 (*d64, &u._Dec);
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73
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74 /* Convert DPD to BID. */
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75 _dpd_to_bid64 (&u._Dec, &u._Dec);
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76
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77 /* dfp.c is in bid endian. */
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78 __host_to_ieee_64 (u._Dec, &u.dec);
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79
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80 /* d64 is returned as a pointer to _Decimal64 here. */
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81 *d64 = u.dec;
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82
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83 return d64;
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84 }
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85
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86 decNumber *
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87 decimal64ToNumber (const decimal64 *bid64, decNumber *dn)
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88 {
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89 /* decimal64 and _Decimal64 are different types. */
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90 union
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91 {
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92 _Decimal64 _Dec;
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93 decimal64 dec;
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94 } u;
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95
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96 /* bid64 is a pointer to _Decimal64 in bid endian. But _bid_to_dpd64
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97 takes host endian. */
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98 __ieee_to_host_64 (*bid64, &u._Dec);
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99
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100 /* Convert BID to DPD. */
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101 _bid_to_dpd64 (&u._Dec, &u._Dec);
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102
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103 /* __dpd64ToNumber is in bid endian. */
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104 __host_to_ieee_64 (u._Dec, &u.dec);
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105
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106 return __dpd64ToNumber (&u.dec, dn);
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107 }
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108
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109 char *
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110 decimal64ToString (const decimal64 *d64, char *string)
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111 {
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112 decNumber dn; /* work */
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113 decimal64ToNumber (d64, &dn);
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114 decNumberToString (&dn, string);
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115 return string;
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116 }
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117
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118 char *
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119 decimal64ToEngString (const decimal64 *d64, char *string)
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120 {
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121 decNumber dn; /* work */
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122 decimal64ToNumber (d64, &dn);
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123 decNumberToEngString (&dn, string);
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124 return string;
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125 }
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126
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127 decimal64 *
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128 decimal64FromString (decimal64 *result, const char *string,
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129 decContext *set)
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130 {
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131 decContext dc; /* work */
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132 decNumber dn; /* .. */
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133
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134 decContextDefault (&dc, DEC_INIT_DECIMAL64); /* no traps, please */
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135 dc.round = set->round; /* use supplied rounding */
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136
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137 decNumberFromString (&dn, string, &dc); /* will round if needed */
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138 decimal64FromNumber (result, &dn, &dc);
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139 if (dc.status != 0)
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140 { /* something happened */
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141 decContextSetStatus (set, dc.status); /* .. pass it on */
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142 }
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143 return result;
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144 }
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