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1 /* Copyright (C) 2007, 2009
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2 Free Software Foundation, Inc.
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3
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4 This file is part of GCC.
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5
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6 GCC is free software; you can redistribute it and/or modify it under
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7 the terms of the GNU General Public License as published by the Free
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8 Software Foundation; either version 3, or (at your option) any later
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9 version.
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10
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11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 for more details.
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15
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16 Under Section 7 of GPL version 3, you are granted additional
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17 permissions described in the GCC Runtime Library Exception, version
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18 3.1, as published by the Free Software Foundation.
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19
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20 You should have received a copy of the GNU General Public License and
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21 a copy of the GCC Runtime Library Exception along with this program;
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22 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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23 <http://www.gnu.org/licenses/>. */
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24
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25 #define decimal128FromString __dpd128FromString
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26 #define decimal128ToString __dpd128ToString
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27 #define decimal128ToEngString __dpd128ToEngString
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28 #define decimal128FromNumber __dpd128FromNumber
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29 #define decimal128ToNumber __dpd128ToNumber
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30
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31 #include "dpd/decimal128.c"
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32
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33 #undef decimal128FromString
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34 #undef decimal128ToString
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35 #undef decimal128ToEngString
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36 #undef decimal128FromNumber
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37 #undef decimal128ToNumber
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38
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39 #include "bid-dpd.h"
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40
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41 #ifdef IN_LIBGCC2
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42 #define decimal128FromString __decimal128FromString
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43 #define decimal128ToString __decimal128ToString
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44 #define decimal128ToEngString __decimal128ToEngString
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45 #define decimal128FromNumber __decimal128FromNumber
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46 #define decimal128ToNumber __decimal128ToNumber
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47 #endif
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48
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49 decimal128 *decimal128FromString (decimal128 *, const char *, decContext *);
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50 char *decimal128ToString (const decimal128 *, char *);
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51 char *decimal128ToEngString (const decimal128 *, char *);
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52 decimal128 *decimal128FromNumber (decimal128 *, const decNumber *, decContext *);
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53 decNumber *decimal128ToNumber (const decimal128 *, decNumber *);
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54
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55 void __host_to_ieee_128 (_Decimal128 in, decimal128 *out);
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56 void __ieee_to_host_128 (decimal128 in, _Decimal128 *out);
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57
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58 decimal128 *
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59 decimal128FromNumber (decimal128 *d128, const decNumber *dn,
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60 decContext *set)
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61 {
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62 /* decimal128 and _Decimal128 are different types. */
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63 union
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64 {
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65 _Decimal128 _Dec;
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66 decimal128 dec;
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67 } u;
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68
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69 __dpd128FromNumber (d128, dn, set);
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70
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71 /* __dpd128FromNumber returns in big endian. But _dpd_to_bid128 takes
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72 host endian. */
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73 __ieee_to_host_128 (*d128, &u._Dec);
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74
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75 /* Convert DPD to BID. */
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76 _dpd_to_bid128 (&u._Dec, &u._Dec);
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77
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78 /* dfp.c is in bid endian. */
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79 __host_to_ieee_128 (u._Dec, &u.dec);
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80
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81 /* d128 is returned as a pointer to _Decimal128 here. */
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82 *d128 = u.dec;
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83
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84 return d128;
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85 }
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86
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87 decNumber *
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88 decimal128ToNumber (const decimal128 *bid128, decNumber *dn)
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89 {
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90 /* decimal128 and _Decimal128 are different types. */
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91 union
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92 {
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93 _Decimal128 _Dec;
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94 decimal128 dec;
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95 } u;
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96
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97 /* bid128 is a pointer to _Decimal128 in bid endian. But _bid_to_dpd128
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98 takes host endian. */
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99 __ieee_to_host_128 (*bid128, &u._Dec);
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100
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101 /* Convert BID to DPD. */
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102 _bid_to_dpd128 (&u._Dec, &u._Dec);
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103
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104 /* __dpd128ToNumber is in bid endian. */
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105 __host_to_ieee_128 (u._Dec, &u.dec);
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106
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107 return __dpd128ToNumber (&u.dec, dn);
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108 }
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109
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110 char *
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111 decimal128ToString (const decimal128 *d128, char *string)
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112 {
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113 decNumber dn; /* work */
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114 decimal128ToNumber (d128, &dn);
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115 decNumberToString (&dn, string);
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116 return string;
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117 }
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118
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119 char *
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120 decimal128ToEngString (const decimal128 *d128, char *string)
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121 {
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122 decNumber dn; /* work */
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123 decimal128ToNumber (d128, &dn);
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124 decNumberToEngString (&dn, string);
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125 return string;
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126 }
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127
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128 decimal128 *
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129 decimal128FromString (decimal128 *result, const char *string,
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130 decContext *set)
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131 {
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132 decContext dc; /* work */
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133 decNumber dn; /* .. */
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134
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135 decContextDefault (&dc, DEC_INIT_DECIMAL128); /* no traps, please */
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136 dc.round = set->round; /* use supplied rounding */
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137
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138 decNumberFromString (&dn, string, &dc); /* will round if needed */
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139 decimal128FromNumber (result, &dn, &dc);
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140 if (dc.status != 0)
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141 { /* something happened */
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142 decContextSetStatus (set, dc.status); /* .. pass it on */
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143 }
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144 return result;
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145 }
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