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1 /* Definitions of target machine for GNU compiler, for IBM S/390
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2 Copyright (C) 1999, 2000, 2001, 2007, 2008 Free Software Foundation, Inc.
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3 Contributed by Hartmut Penner (hpenner@de.ibm.com) and
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4 Ulrich Weigand (uweigand@de.ibm.com).
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5
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6 This file is part of GCC.
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7
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8 GCC is free software; you can redistribute it and/or modify it under
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9 the terms of the GNU General Public License as published by the Free
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10 Software Foundation; either version 3, or (at your option) any later
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11 version.
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12
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13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with GCC; see the file COPYING3. If not see
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20 <http://www.gnu.org/licenses/>. */
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21
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22 #ifdef L_fixunstfdi
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23
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24 #define EXPD(fp) (((fp.l.i[0]) >> 16) & 0x7FFF)
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25 #define EXPONENT_BIAS 16383
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26 #define MANTISSA_BITS 112
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27 #define PRECISION (MANTISSA_BITS + 1)
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28 #define SIGNBIT 0x80000000
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29 #define SIGND(fp) ((fp.l.i[0]) & SIGNBIT)
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30 #define MANTD_HIGH_LL(fp) ((fp.ll[0] & HIGH_LL_FRAC_MASK) | HIGH_LL_UNIT_BIT)
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31 #define MANTD_LOW_LL(fp) (fp.ll[1])
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32 #define FRACD_ZERO_P(fp) (!fp.ll[1] && !(fp.ll[0] & HIGH_LL_FRAC_MASK))
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33 #define HIGH_LL_FRAC_BITS 48
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34 #define HIGH_LL_UNIT_BIT ((UDItype_x)1 << HIGH_LL_FRAC_BITS)
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35 #define HIGH_LL_FRAC_MASK (HIGH_LL_UNIT_BIT - 1)
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36
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37 typedef int DItype_x __attribute__ ((mode (DI)));
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38 typedef unsigned int UDItype_x __attribute__ ((mode (DI)));
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39 typedef int SItype_x __attribute__ ((mode (SI)));
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40 typedef unsigned int USItype_x __attribute__ ((mode (SI)));
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41
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42 union double_long {
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43 long double d;
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44 struct {
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45 SItype_x i[4]; /* 32 bit parts: 0 upper ... 3 lowest */
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46 } l;
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47 UDItype_x ll[2]; /* 64 bit parts: 0 upper, 1 lower */
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48 };
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49
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50 UDItype_x __fixunstfdi (long double a1);
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51
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52 /* convert double to unsigned int */
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53 UDItype_x
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54 __fixunstfdi (long double a1)
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55 {
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56 register union double_long dl1;
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57 register int exp;
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58 register UDItype_x l;
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59
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60 dl1.d = a1;
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61
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62 /* +/- 0, denormalized, negative */
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63 if (!EXPD (dl1) || SIGND(dl1))
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64 return 0;
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65
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66 /* The exponent - considered the binary point at the right end of
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67 the mantissa. */
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68 exp = EXPD (dl1) - EXPONENT_BIAS - MANTISSA_BITS;
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69
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70 /* number < 1: If the mantissa would need to be right-shifted more bits than
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71 its size (plus the implied one bit on the left) the result would be
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72 zero. */
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73 if (exp <= -PRECISION)
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74 return 0;
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75
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76 /* NaN: All exponent bits set and a nonzero fraction. */
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77 if ((EXPD(dl1) == 0x7fff) && !FRACD_ZERO_P (dl1))
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78 return 0x0ULL;
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79
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80 /* One extra bit is needed for the unit bit which is appended by
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81 MANTD_HIGH_LL on the left of the matissa. */
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82 exp += HIGH_LL_FRAC_BITS + 1;
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83
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84 /* If the result would still need a left shift it will be too large
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85 to be represented. */
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86 if (exp > 0)
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87 return 0xFFFFFFFFFFFFFFFFULL;
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88
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89 l = MANTD_LOW_LL (dl1) >> (HIGH_LL_FRAC_BITS + 1)
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90 | MANTD_HIGH_LL (dl1) << (64 - (HIGH_LL_FRAC_BITS + 1));
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91
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92 return l >> -exp;
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93 }
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94 #define __fixunstfdi ___fixunstfdi
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95 #endif
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96 #undef L_fixunstfdi
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97
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98 #ifdef L_fixtfdi
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99 #define EXPD(fp) (((fp.l.i[0]) >> 16) & 0x7FFF)
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100 #define EXPONENT_BIAS 16383
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101 #define MANTISSA_BITS 112
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102 #define PRECISION (MANTISSA_BITS + 1)
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103 #define SIGNBIT 0x80000000
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104 #define SIGND(fp) ((fp.l.i[0]) & SIGNBIT)
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105 #define MANTD_HIGH_LL(fp) ((fp.ll[0] & HIGH_LL_FRAC_MASK) | HIGH_LL_UNIT_BIT)
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106 #define MANTD_LOW_LL(fp) (fp.ll[1])
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107 #define FRACD_ZERO_P(fp) (!fp.ll[1] && !(fp.ll[0] & HIGH_LL_FRAC_MASK))
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108 #define HIGH_LL_FRAC_BITS 48
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109 #define HIGH_LL_UNIT_BIT ((UDItype_x)1 << HIGH_LL_FRAC_BITS)
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110 #define HIGH_LL_FRAC_MASK (HIGH_LL_UNIT_BIT - 1)
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111
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112 typedef int DItype_x __attribute__ ((mode (DI)));
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113 typedef unsigned int UDItype_x __attribute__ ((mode (DI)));
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114 typedef int SItype_x __attribute__ ((mode (SI)));
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115 typedef unsigned int USItype_x __attribute__ ((mode (SI)));
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116
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117 union double_long {
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118 long double d;
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119 struct {
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120 SItype_x i[4]; /* 32 bit parts: 0 upper ... 3 lowest */
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121 } l;
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122 UDItype_x ll[2]; /* 64 bit parts: 0 upper, 1 lower */
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123 };
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124
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125 DItype_x __fixtfdi (long double a1);
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126
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127 /* convert double to unsigned int */
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128 DItype_x
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129 __fixtfdi (long double a1)
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130 {
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131 register union double_long dl1;
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132 register int exp;
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133 register UDItype_x l;
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134
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135 dl1.d = a1;
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136
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137 /* +/- 0, denormalized */
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138 if (!EXPD (dl1))
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139 return 0;
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140
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141 /* The exponent - considered the binary point at the right end of
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142 the mantissa. */
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143 exp = EXPD (dl1) - EXPONENT_BIAS - MANTISSA_BITS;
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144
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145 /* number < 1: If the mantissa would need to be right-shifted more bits than
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146 its size the result would be zero. */
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147 if (exp <= -PRECISION)
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148 return 0;
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149
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150 /* NaN: All exponent bits set and a nonzero fraction. */
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151 if ((EXPD(dl1) == 0x7fff) && !FRACD_ZERO_P (dl1))
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152 return 0x8000000000000000ULL;
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153
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154 /* One extra bit is needed for the unit bit which is appended by
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155 MANTD_HIGH_LL on the left of the matissa. */
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156 exp += HIGH_LL_FRAC_BITS + 1;
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157
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158 /* If the result would still need a left shift it will be too large
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159 to be represented. Compared to the unsigned variant we have to
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160 take care that there is still space for the sign bit to be
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161 applied. So we can only go on if there is a right-shift by one
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162 or more. */
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163 if (exp >= 0)
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164 {
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165 l = 1ULL << 63; /* long long min */
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166 return SIGND (dl1) ? l : l - 1;
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167 }
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168
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169 l = MANTD_LOW_LL (dl1) >> (HIGH_LL_FRAC_BITS + 1)
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170 | MANTD_HIGH_LL (dl1) << (64 - (HIGH_LL_FRAC_BITS + 1));
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171
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172 return SIGND (dl1) ? -(l >> -exp) : l >> -exp;
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173 }
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174 #define __fixtfdi ___fixtfdi
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175 #endif
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176 #undef L_fixtfdi
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177
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178 #ifdef L_fixunsdfdi
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179 #define EXPD(fp) (((fp.l.upper) >> 20) & 0x7FF)
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180 #define EXCESSD 1022
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181 #define SIGNBIT 0x80000000
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182 #define SIGND(fp) ((fp.l.upper) & SIGNBIT)
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183 #define MANTD_LL(fp) ((fp.ll & (HIDDEND_LL-1)) | HIDDEND_LL)
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184 #define FRACD_LL(fp) (fp.ll & (HIDDEND_LL-1))
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185 #define HIDDEND_LL ((UDItype_x)1 << 52)
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186
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187 typedef int DItype_x __attribute__ ((mode (DI)));
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188 typedef unsigned int UDItype_x __attribute__ ((mode (DI)));
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189 typedef int SItype_x __attribute__ ((mode (SI)));
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190 typedef unsigned int USItype_x __attribute__ ((mode (SI)));
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191
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192 union double_long {
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193 double d;
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194 struct {
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195 SItype_x upper;
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196 USItype_x lower;
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197 } l;
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198 UDItype_x ll;
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199 };
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200
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201 UDItype_x __fixunsdfdi (double a1);
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202
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203 /* convert double to unsigned int */
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204 UDItype_x
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205 __fixunsdfdi (double a1)
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206 {
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207 register union double_long dl1;
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208 register int exp;
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209 register UDItype_x l;
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210
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211 dl1.d = a1;
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212
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213 /* +/- 0, denormalized, negative */
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214
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215 if (!EXPD (dl1) || SIGND(dl1))
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216 return 0;
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217
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218 exp = EXPD (dl1) - EXCESSD - 53;
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219
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220 /* number < 1 */
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221
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222 if (exp < -53)
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223 return 0;
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224
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225 /* NaN */
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226
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227 if ((EXPD(dl1) == 0x7ff) && (FRACD_LL(dl1) != 0)) /* NaN */
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228 return 0x0ULL;
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229
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230 /* Number big number & + inf */
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231
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232 if (exp >= 12) {
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233 return 0xFFFFFFFFFFFFFFFFULL;
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234 }
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235
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236 l = MANTD_LL(dl1);
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237
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238 /* shift down until exp < 12 or l = 0 */
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239 if (exp > 0)
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240 l <<= exp;
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241 else
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242 l >>= -exp;
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243
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244 return l;
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245 }
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246 #define __fixunsdfdi ___fixunsdfdi
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247 #endif
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248 #undef L_fixunsdfdi
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249
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250 #ifdef L_fixdfdi
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251 #define EXPD(fp) (((fp.l.upper) >> 20) & 0x7FF)
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252 #define EXCESSD 1022
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253 #define SIGNBIT 0x80000000
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254 #define SIGND(fp) ((fp.l.upper) & SIGNBIT)
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255 #define MANTD_LL(fp) ((fp.ll & (HIDDEND_LL-1)) | HIDDEND_LL)
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256 #define FRACD_LL(fp) (fp.ll & (HIDDEND_LL-1))
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257 #define HIDDEND_LL ((UDItype_x)1 << 52)
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258
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259 typedef int DItype_x __attribute__ ((mode (DI)));
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260 typedef unsigned int UDItype_x __attribute__ ((mode (DI)));
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261 typedef int SItype_x __attribute__ ((mode (SI)));
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262 typedef unsigned int USItype_x __attribute__ ((mode (SI)));
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263
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264 union double_long {
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265 double d;
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266 struct {
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267 SItype_x upper;
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268 USItype_x lower;
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269 } l;
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270 UDItype_x ll;
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271 };
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272
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273 DItype_x __fixdfdi (double a1);
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274
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275 /* convert double to int */
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276 DItype_x
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277 __fixdfdi (double a1)
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278 {
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279 register union double_long dl1;
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280 register int exp;
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281 register DItype_x l;
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282
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283 dl1.d = a1;
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284
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285 /* +/- 0, denormalized */
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286
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287 if (!EXPD (dl1))
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288 return 0;
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289
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290 exp = EXPD (dl1) - EXCESSD - 53;
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291
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292 /* number < 1 */
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293
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294 if (exp < -53)
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295 return 0;
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296
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297 /* NaN */
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298
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299 if ((EXPD(dl1) == 0x7ff) && (FRACD_LL(dl1) != 0)) /* NaN */
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300 return 0x8000000000000000ULL;
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301
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302 /* Number big number & +/- inf */
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303
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304 if (exp >= 11) {
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305 l = (long long)1<<63;
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306 if (!SIGND(dl1))
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307 l--;
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308 return l;
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309 }
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310
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311 l = MANTD_LL(dl1);
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312
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313 /* shift down until exp < 12 or l = 0 */
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314 if (exp > 0)
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315 l <<= exp;
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316 else
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317 l >>= -exp;
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318
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319 return (SIGND (dl1) ? -l : l);
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320 }
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321 #define __fixdfdi ___fixdfdi
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322 #endif
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323 #undef L_fixdfdi
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324
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325 #ifdef L_fixunssfdi
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326 #define EXP(fp) (((fp.l) >> 23) & 0xFF)
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327 #define EXCESS 126
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328 #define SIGNBIT 0x80000000
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329 #define SIGN(fp) ((fp.l) & SIGNBIT)
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330 #define HIDDEN (1 << 23)
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331 #define MANT(fp) (((fp.l) & 0x7FFFFF) | HIDDEN)
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332 #define FRAC(fp) ((fp.l) & 0x7FFFFF)
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333
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334 typedef int DItype_x __attribute__ ((mode (DI)));
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335 typedef unsigned int UDItype_x __attribute__ ((mode (DI)));
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336 typedef int SItype_x __attribute__ ((mode (SI)));
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337 typedef unsigned int USItype_x __attribute__ ((mode (SI)));
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338
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339 union float_long
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340 {
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341 float f;
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342 USItype_x l;
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343 };
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344
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345 UDItype_x __fixunssfdi (float a1);
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346
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347 /* convert float to unsigned int */
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348 UDItype_x
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349 __fixunssfdi (float a1)
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350 {
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351 register union float_long fl1;
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352 register int exp;
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353 register UDItype_x l;
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354
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355 fl1.f = a1;
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356
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357 /* +/- 0, denormalized, negative */
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358
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359 if (!EXP (fl1) || SIGN(fl1))
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360 return 0;
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361
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362 exp = EXP (fl1) - EXCESS - 24;
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363
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364 /* number < 1 */
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365
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366 if (exp < -24)
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367 return 0;
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368
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369 /* NaN */
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370
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371 if ((EXP(fl1) == 0xff) && (FRAC(fl1) != 0)) /* NaN */
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372 return 0x0ULL;
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373
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374 /* Number big number & + inf */
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375
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376 if (exp >= 41) {
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377 return 0xFFFFFFFFFFFFFFFFULL;
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378 }
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379
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380 l = MANT(fl1);
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381
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382 if (exp > 0)
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383 l <<= exp;
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384 else
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385 l >>= -exp;
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386
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387 return l;
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388 }
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389 #define __fixunssfdi ___fixunssfdi
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390 #endif
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391 #undef L_fixunssfdi
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392
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393 #ifdef L_fixsfdi
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394 #define EXP(fp) (((fp.l) >> 23) & 0xFF)
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395 #define EXCESS 126
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396 #define SIGNBIT 0x80000000
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397 #define SIGN(fp) ((fp.l) & SIGNBIT)
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398 #define HIDDEN (1 << 23)
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399 #define MANT(fp) (((fp.l) & 0x7FFFFF) | HIDDEN)
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400 #define FRAC(fp) ((fp.l) & 0x7FFFFF)
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401
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402 typedef int DItype_x __attribute__ ((mode (DI)));
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403 typedef unsigned int UDItype_x __attribute__ ((mode (DI)));
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404 typedef int SItype_x __attribute__ ((mode (SI)));
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405 typedef unsigned int USItype_x __attribute__ ((mode (SI)));
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406
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407 union float_long
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408 {
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409 float f;
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410 USItype_x l;
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411 };
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412
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413 DItype_x __fixsfdi (float a1);
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414
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415 /* convert double to int */
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416 DItype_x
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417 __fixsfdi (float a1)
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418 {
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419 register union float_long fl1;
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420 register int exp;
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421 register DItype_x l;
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422
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423 fl1.f = a1;
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424
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425 /* +/- 0, denormalized */
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426
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427 if (!EXP (fl1))
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428 return 0;
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429
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430 exp = EXP (fl1) - EXCESS - 24;
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431
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432 /* number < 1 */
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433
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434 if (exp < -24)
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435 return 0;
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436
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437 /* NaN */
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438
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439 if ((EXP(fl1) == 0xff) && (FRAC(fl1) != 0)) /* NaN */
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440 return 0x8000000000000000ULL;
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441
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442 /* Number big number & +/- inf */
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443
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444 if (exp >= 40) {
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445 l = (long long)1<<63;
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446 if (!SIGN(fl1))
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447 l--;
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448 return l;
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449 }
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450
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451 l = MANT(fl1);
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452
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453 if (exp > 0)
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454 l <<= exp;
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455 else
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456 l >>= -exp;
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457
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458 return (SIGN (fl1) ? -l : l);
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459 }
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460 #define __fixsfdi ___fixsfdi
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461 #endif
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462 #undef L_fixsfdi
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