1 | /* Note: We must use the name __builtin_savregs. GCC attaches special |
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2 | significance to that name. In particular, regardless of where in a |
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3 | function __builtin_saveregs is called, GCC moves the call up to the |
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4 | very start of the function. */ |
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5 | |
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6 | |
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7 | /* Define __gnuc_va_list. */ |
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8 | |
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9 | #ifndef __GNUC_VA_LIST |
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10 | #define __GNUC_VA_LIST |
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11 | |
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12 | typedef union { |
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13 | float __freg[8]; |
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14 | double __dreg[4]; |
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15 | } __f_regs; |
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16 | |
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17 | typedef struct { |
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18 | #if defined (__SVR4__) || defined (__svr4__) || defined (__alliant__) || defined (__PARAGON__) |
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19 | __f_regs __float_regs; long __ireg[12]; |
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20 | #else /* pre-SVR4 */ |
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21 | long __ireg[12]; __f_regs __float_regs; |
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22 | #endif |
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23 | } __va_saved_regs; |
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24 | |
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25 | typedef struct { |
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26 | #if defined(__SVR4__) || defined(__svr4__) || defined(__alliant__) || defined (__PARAGON__) |
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27 | unsigned __ireg_used; /* How many int regs consumed 'til now? */ |
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28 | unsigned __freg_used; /* How many flt regs consumed 'til now? */ |
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29 | long *__reg_base; /* Address of where we stored the regs. */ |
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30 | long * __mem_ptr; /* Address of memory overflow args area. */ |
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31 | #else /* pre-SVR4 */ |
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32 | long *__reg_base; /* Address of where we stored the regs. */ |
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33 | long * __mem_ptr; /* Address of memory overflow args area. */ |
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34 | unsigned __ireg_used; /* How many int regs consumed 'til now? */ |
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35 | unsigned __freg_used; /* How many flt regs consumed 'til now? */ |
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36 | #endif |
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37 | } __gnuc_va_list; |
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38 | #endif /* not __GNUC_VA_LIST */ |
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39 | |
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40 | /* If this is for internal libc use, don't define anything but |
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41 | __gnuc_va_list. */ |
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42 | #if defined (_STDARG_H) || defined (_VARARGS_H) |
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43 | |
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44 | #if !defined(_STDARG_H) |
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45 | |
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46 | /* varargs support */ |
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47 | #define va_alist __builtin_va_alist |
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48 | #if defined (__PARAGON__) |
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49 | #define va_dcl int va_alist; |
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50 | #else /* __PARAGON__ */ |
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51 | #define va_dcl |
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52 | #endif /* __PARAGON__ */ |
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53 | #define va_start(pvar) ((pvar) = * (__gnuc_va_list *) __builtin_saveregs ()) |
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54 | |
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55 | #else /* STDARG.H */ |
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56 | |
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57 | /* ANSI alternative. */ |
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58 | /* Note that CUMULATIVE_ARGS elements are measured in bytes on the i860, |
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59 | so we divide by 4 to get # of registers. */ |
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60 | #define va_start(pvar, firstarg) \ |
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61 | ((pvar) = *(__gnuc_va_list *) __builtin_saveregs (), \ |
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62 | (pvar).__ireg_used = __builtin_args_info (0) / 4, \ |
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63 | (pvar).__freg_used = __builtin_args_info (1) / 4, \ |
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64 | (pvar).__mem_ptr = __builtin_next_arg (firstarg)) |
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65 | |
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66 | #endif /* _STDARG_H */ |
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67 | |
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68 | /* Values returned by __builtin_classify_type. */ |
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69 | |
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70 | #ifndef va_end |
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71 | enum { |
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72 | __no_type_class = -1, |
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73 | __void_type_class, |
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74 | __integer_type_class, |
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75 | __char_type_class, |
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76 | __enumeral_type_class, |
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77 | __boolean_type_class, |
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78 | __pointer_type_class, |
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79 | __reference_type_class, |
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80 | __offset_type_class, |
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81 | __real_type_class, |
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82 | __complex_type_class, |
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83 | __function_type_class, |
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84 | __method_type_class, |
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85 | __record_type_class, |
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86 | __union_type_class, |
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87 | __array_type_class, |
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88 | __string_type_class, |
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89 | __set_type_class, |
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90 | __file_type_class, |
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91 | __lang_type_class |
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92 | }; |
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93 | |
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94 | void va_end (__gnuc_va_list); /* Defined in libgcc.a */ |
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95 | #endif |
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96 | #define va_end(__va) ((void) 0) |
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97 | |
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98 | #define __NUM_PARM_FREGS 8 |
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99 | #define __NUM_PARM_IREGS 12 |
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100 | |
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101 | #define __savereg(__va) ((__va_saved_regs *) ((__va).__reg_base)) |
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102 | |
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103 | /* This macro works both for SVR4 and pre-SVR4 environments. */ |
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104 | |
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105 | /* Note that parameters are always aligned at least to a word boundary |
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106 | (when passed) regardless of what GCC's __alignof__ operator says. */ |
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107 | |
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108 | /* Make allowances here for adding 128-bit (long double) floats someday. */ |
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109 | |
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110 | #if 0 /* What was this for? */ |
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111 | #ifndef __GNU_VA_LIST |
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112 | #define __ireg_used ireg_used |
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113 | #define __freg_used freg_used |
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114 | #define __mem_ptr mem_ptr |
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115 | #define __reg_base reg_base |
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116 | #endif |
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117 | #endif /* 0 */ |
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118 | |
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119 | /* Avoid errors if compiling GCC v2 with GCC v1. */ |
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120 | #if __GNUC__ == 1 |
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121 | #define __extension__ |
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122 | #endif |
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123 | |
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124 | #define va_arg(__va, __type) \ |
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125 | __extension__ \ |
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126 | (* (__type *) \ |
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127 | ({ \ |
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128 | register void *__rv; /* result value */ \ |
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129 | register unsigned __align; \ |
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130 | switch (__builtin_classify_type (* (__type *) 0)) \ |
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131 | { \ |
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132 | case __real_type_class: \ |
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133 | switch (sizeof (__type)) \ |
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134 | { \ |
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135 | case sizeof (float): \ |
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136 | case sizeof (double): \ |
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137 | if ((__va).__freg_used < __NUM_PARM_FREGS - 1) \ |
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138 | { \ |
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139 | if (((__va).__freg_used & 1) != 0) \ |
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140 | (__va).__freg_used++; /* skip odd */ \ |
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141 | __rv = &__savereg((__va))->__float_regs.__freg[(__va).__freg_used];\ |
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142 | (__va).__freg_used += 2; \ |
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143 | } \ |
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144 | else \ |
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145 | { \ |
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146 | if ((((unsigned) (__va).__mem_ptr) & (sizeof(double)-1)) != 0) \ |
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147 | (__va).__mem_ptr++; /* skip odd */ \ |
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148 | __rv = (__va).__mem_ptr; \ |
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149 | (__va).__mem_ptr += 2; \ |
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150 | } \ |
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151 | if (sizeof (__type) == sizeof (float)) \ |
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152 | { \ |
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153 | *((float *) __rv) = *((double *) __rv); \ |
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154 | *(((long *) __rv) + 1) = 0xfff00001; \ |
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155 | } \ |
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156 | break; \ |
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157 | default: \ |
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158 | abort (); \ |
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159 | } \ |
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160 | break; \ |
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161 | case __void_type_class: \ |
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162 | case __integer_type_class: \ |
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163 | case __char_type_class: \ |
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164 | case __enumeral_type_class: \ |
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165 | case __boolean_type_class: \ |
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166 | case __pointer_type_class: \ |
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167 | case __reference_type_class: \ |
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168 | case __offset_type_class: \ |
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169 | if (sizeof (__type) <= 4) \ |
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170 | { \ |
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171 | __rv = ((__va).__ireg_used < __NUM_PARM_IREGS \ |
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172 | ? (&__savereg((__va))->__ireg[(__va).__ireg_used++]) \ |
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173 | : (__va).__mem_ptr++); \ |
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174 | break; \ |
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175 | } \ |
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176 | else if ((__va).__ireg_used + sizeof (__type) / 4 <= __NUM_PARM_IREGS) \ |
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177 | { \ |
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178 | __rv = &__savereg((__va))->__ireg[(__va).__ireg_used]; \ |
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179 | (__va).__ireg_used += sizeof (__type) / 4; \ |
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180 | break; \ |
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181 | } \ |
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182 | /* Fall through to fetch from memory. */ \ |
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183 | case __record_type_class: \ |
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184 | case __union_type_class: \ |
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185 | __align = (__alignof__ (__type) < sizeof (long) \ |
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186 | ? sizeof (long) \ |
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187 | : __alignof__ (__type)); \ |
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188 | (__va).__mem_ptr \ |
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189 | = (long *) \ |
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190 | ((((unsigned) (__va).__mem_ptr) + (__align-1)) & ~(__align-1)); \ |
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191 | __rv = (__va).__mem_ptr; \ |
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192 | (__va).__mem_ptr \ |
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193 | += ((sizeof (__type) + sizeof (long) - 1) / sizeof (long)); \ |
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194 | break; \ |
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195 | case __complex_type_class: \ |
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196 | case __function_type_class: \ |
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197 | case __method_type_class: \ |
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198 | case __array_type_class: \ |
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199 | case __string_type_class: \ |
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200 | case __set_type_class: \ |
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201 | case __file_type_class: \ |
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202 | case __lang_type_class: \ |
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203 | case __no_type_class: \ |
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204 | default: \ |
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205 | abort (); \ |
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206 | } \ |
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207 | __rv; \ |
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208 | })) |
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209 | |
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210 | #endif /* defined (_STDARG_H) || defined (_VARARGS_H) */ |
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211 | |
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