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1 /* Functions needed for soft-float on powerpc64-linux, copied from
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2 libgcc2.c with macros expanded to force the use of specific types.
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3
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4 Copyright (C) 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
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5 2000, 2001, 2002, 2003, 2004, 2006, 2009 Free Software Foundation,
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6 Inc.
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7
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8 This file is part of GCC.
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9
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10 GCC is free software; you can redistribute it and/or modify it under
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11 the terms of the GNU General Public License as published by the Free
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12 Software Foundation; either version 3, or (at your option) any later
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13 version.
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14
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15 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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16 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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17 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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18 for more details.
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19
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20 Under Section 7 of GPL version 3, you are granted additional
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21 permissions described in the GCC Runtime Library Exception, version
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22 3.1, as published by the Free Software Foundation.
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23
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24 You should have received a copy of the GNU General Public License and
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25 a copy of the GCC Runtime Library Exception along with this program;
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26 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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27 <http://www.gnu.org/licenses/>. */
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28
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29 #if defined(__powerpc64__) || defined (__64BIT__) || defined(__ppc64__)
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30 #define TMODES
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31 #include "config/fp-bit.h"
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32
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33 extern DItype __fixtfdi (TFtype);
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34 extern DItype __fixdfdi (DFtype);
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35 extern DItype __fixsfdi (SFtype);
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36 extern USItype __fixunsdfsi (DFtype);
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37 extern USItype __fixunssfsi (SFtype);
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38 extern TFtype __floatditf (DItype);
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39 extern TFtype __floatunditf (UDItype);
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40 extern DFtype __floatdidf (DItype);
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41 extern DFtype __floatundidf (UDItype);
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42 extern SFtype __floatdisf (DItype);
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43 extern SFtype __floatundisf (UDItype);
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44 extern DItype __fixunstfdi (TFtype);
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45
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46 static DItype local_fixunssfdi (SFtype);
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47 static DItype local_fixunsdfdi (DFtype);
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48
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49 DItype
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50 __fixtfdi (TFtype a)
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51 {
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52 if (a < 0)
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53 return - __fixunstfdi (-a);
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54 return __fixunstfdi (a);
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55 }
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56
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57 DItype
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58 __fixdfdi (DFtype a)
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59 {
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60 if (a < 0)
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61 return - local_fixunsdfdi (-a);
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62 return local_fixunsdfdi (a);
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63 }
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64
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65 DItype
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66 __fixsfdi (SFtype a)
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67 {
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68 if (a < 0)
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69 return - local_fixunssfdi (-a);
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70 return local_fixunssfdi (a);
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71 }
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72
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73 USItype
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74 __fixunsdfsi (DFtype a)
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75 {
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76 if (a >= - (DFtype) (- ((SItype)(((USItype)1 << ((4 * 8) - 1)) - 1)) - 1))
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77 return (SItype) (a + (- ((SItype)(((USItype)1 << ((4 * 8) - 1)) - 1)) - 1))
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78 - (- ((SItype)(((USItype)1 << ((4 * 8) - 1)) - 1)) - 1);
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79 return (SItype) a;
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80 }
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81
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82 USItype
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83 __fixunssfsi (SFtype a)
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84 {
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85 if (a >= - (SFtype) (- ((SItype)(((USItype)1 << ((4 * 8) - 1)) - 1)) - 1))
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86 return (SItype) (a + (- ((SItype)(((USItype)1 << ((4 * 8) - 1)) - 1)) - 1))
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87 - (- ((SItype)(((USItype)1 << ((4 * 8) - 1)) - 1)) - 1);
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88 return (SItype) a;
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89 }
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90
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91 TFtype
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92 __floatditf (DItype u)
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93 {
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94 DFtype dh, dl;
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95
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96 dh = (SItype) (u >> (sizeof (SItype) * 8));
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97 dh *= 2.0 * (((UDItype) 1) << ((sizeof (SItype) * 8) - 1));
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98 dl = (USItype) (u & ((((UDItype) 1) << (sizeof (SItype) * 8)) - 1));
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99
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100 return (TFtype) dh + (TFtype) dl;
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101 }
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102
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103 TFtype
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104 __floatunditf (UDItype u)
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105 {
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106 DFtype dh, dl;
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107
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108 dh = (USItype) (u >> (sizeof (SItype) * 8));
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109 dh *= 2.0 * (((UDItype) 1) << ((sizeof (SItype) * 8) - 1));
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110 dl = (USItype) (u & ((((UDItype) 1) << (sizeof (SItype) * 8)) - 1));
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111
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112 return (TFtype) dh + (TFtype) dl;
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113 }
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114
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115 DFtype
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116 __floatdidf (DItype u)
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117 {
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118 DFtype d;
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119
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120 d = (SItype) (u >> (sizeof (SItype) * 8));
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121 d *= 2.0 * (((UDItype) 1) << ((sizeof (SItype) * 8) - 1));
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122 d += (USItype) (u & ((((UDItype) 1) << (sizeof (SItype) * 8)) - 1));
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123
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124 return d;
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125 }
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126
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127 DFtype
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128 __floatundidf (UDItype u)
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129 {
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130 DFtype d;
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131
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132 d = (USItype) (u >> (sizeof (SItype) * 8));
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133 d *= 2.0 * (((UDItype) 1) << ((sizeof (SItype) * 8) - 1));
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134 d += (USItype) (u & ((((UDItype) 1) << (sizeof (SItype) * 8)) - 1));
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135
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136 return d;
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137 }
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138
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139 SFtype
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140 __floatdisf (DItype u)
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141 {
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142 DFtype f;
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143
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144 if (53 < (sizeof (DItype) * 8)
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145 && 53 > ((sizeof (DItype) * 8) - 53 + 24))
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146 {
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147 if (! (- ((DItype) 1 << 53) < u
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148 && u < ((DItype) 1 << 53)))
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149 {
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150 if ((UDItype) u & (((UDItype) 1 << ((sizeof (DItype) * 8) - 53)) - 1))
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151 {
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152 u &= ~ (((UDItype) 1 << ((sizeof (DItype) * 8) - 53)) - 1);
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153 u |= ((UDItype) 1 << ((sizeof (DItype) * 8) - 53));
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154 }
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155 }
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156 }
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157 f = (SItype) (u >> (sizeof (SItype) * 8));
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158 f *= 2.0 * (((UDItype) 1) << ((sizeof (SItype) * 8) - 1));
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159 f += (USItype) (u & ((((UDItype) 1) << (sizeof (SItype) * 8)) - 1));
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160
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161 return (SFtype) f;
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162 }
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163
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164 SFtype
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165 __floatundisf (UDItype u)
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166 {
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167 DFtype f;
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168
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169 if (53 < (sizeof (DItype) * 8)
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170 && 53 > ((sizeof (DItype) * 8) - 53 + 24))
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171 {
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172 if (u >= ((UDItype) 1 << 53))
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173 {
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174 if ((UDItype) u & (((UDItype) 1 << ((sizeof (DItype) * 8) - 53)) - 1))
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175 {
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176 u &= ~ (((UDItype) 1 << ((sizeof (DItype) * 8) - 53)) - 1);
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177 u |= ((UDItype) 1 << ((sizeof (DItype) * 8) - 53));
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178 }
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179 }
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180 }
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181 f = (USItype) (u >> (sizeof (SItype) * 8));
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182 f *= 2.0 * (((UDItype) 1) << ((sizeof (SItype) * 8) - 1));
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183 f += (USItype) (u & ((((UDItype) 1) << (sizeof (SItype) * 8)) - 1));
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184
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185 return (SFtype) f;
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186 }
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187
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188 DItype
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189 __fixunstfdi (TFtype a)
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190 {
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191 if (a < 0)
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192 return 0;
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193
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194 /* Compute high word of result, as a flonum. */
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195 const TFtype b = (a / (((UDItype) 1) << (sizeof (SItype) * 8)));
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196 /* Convert that to fixed (but not to DItype!),
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197 and shift it into the high word. */
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198 UDItype v = (USItype) b;
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199 v <<= (sizeof (SItype) * 8);
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200 /* Remove high part from the TFtype, leaving the low part as flonum. */
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201 a -= (TFtype) v;
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202 /* Convert that to fixed (but not to DItype!) and add it in.
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203 Sometimes A comes out negative. This is significant, since
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204 A has more bits than a long int does. */
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205 if (a < 0)
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206 v -= (USItype) (-a);
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207 else
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208 v += (USItype) a;
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209 return v;
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210 }
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211
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212 /* This version is needed to prevent recursion; fixunsdfdi in libgcc
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213 calls fixdfdi, which in turn calls calls fixunsdfdi. */
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214
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215 static DItype
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216 local_fixunsdfdi (DFtype a)
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217 {
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218 USItype hi, lo;
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219
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220 hi = a / (((UDItype) 1) << (sizeof (SItype) * 8));
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221 lo = (a - ((DFtype) hi) * (((UDItype) 1) << (sizeof (SItype) * 8)));
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222 return ((UDItype) hi << (sizeof (SItype) * 8)) | lo;
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223 }
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224
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225 /* This version is needed to prevent recursion; fixunssfdi in libgcc
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226 calls fixsfdi, which in turn calls calls fixunssfdi. */
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227
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228 static DItype
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229 local_fixunssfdi (SFtype original_a)
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230 {
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231 DFtype a = original_a;
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232 USItype hi, lo;
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233
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234 hi = a / (((UDItype) 1) << (sizeof (SItype) * 8));
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235 lo = (a - ((DFtype) hi) * (((UDItype) 1) << (sizeof (SItype) * 8)));
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236 return ((UDItype) hi << (sizeof (SItype) * 8)) | lo;
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237 }
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238
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239 #endif /* __powerpc64__ */
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