1 | /*
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2 | * Software MMU support
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3 | *
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4 | * Copyright (c) 2003 Fabrice Bellard
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5 | *
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6 | * This library is free software; you can redistribute it and/or
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7 | * modify it under the terms of the GNU Lesser General Public
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8 | * License as published by the Free Software Foundation; either
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9 | * version 2 of the License, or (at your option) any later version.
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10 | *
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11 | * This library is distributed in the hope that it will be useful,
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 | * Lesser General Public License for more details.
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15 | *
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16 | * You should have received a copy of the GNU Lesser General Public
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17 | * License along with this library; if not, write to the Free Software
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18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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19 | */
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20 | #if DATA_SIZE == 8
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21 | #define SUFFIX q
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22 | #define USUFFIX q
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23 | #define DATA_TYPE uint64_t
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24 | #elif DATA_SIZE == 4
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25 | #define SUFFIX l
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26 | #define USUFFIX l
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27 | #define DATA_TYPE uint32_t
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28 | #elif DATA_SIZE == 2
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29 | #define SUFFIX w
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30 | #define USUFFIX uw
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31 | #define DATA_TYPE uint16_t
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32 | #define DATA_STYPE int16_t
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33 | #elif DATA_SIZE == 1
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34 | #define SUFFIX b
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35 | #define USUFFIX ub
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36 | #define DATA_TYPE uint8_t
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37 | #define DATA_STYPE int8_t
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38 | #else
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39 | #error unsupported data size
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40 | #endif
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41 |
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42 | #if ACCESS_TYPE == 0
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43 |
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44 | #define CPU_MEM_INDEX 0
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45 | #define MMUSUFFIX _mmu
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46 |
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47 | #elif ACCESS_TYPE == 1
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48 |
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49 | #define CPU_MEM_INDEX 1
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50 | #define MMUSUFFIX _mmu
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51 |
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52 | #elif ACCESS_TYPE == 2
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53 |
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54 | #ifdef TARGET_I386
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55 | #define CPU_MEM_INDEX ((env->hflags & HF_CPL_MASK) == 3)
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56 | #elif defined (TARGET_PPC)
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57 | #define CPU_MEM_INDEX (msr_pr)
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58 | #elif defined (TARGET_MIPS)
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59 | #define CPU_MEM_INDEX ((env->hflags & MIPS_HFLAG_MODE) == MIPS_HFLAG_UM)
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60 | #elif defined (TARGET_SPARC)
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61 | #define CPU_MEM_INDEX ((env->psrs) == 0)
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62 | #elif defined (TARGET_ARM)
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63 | #define CPU_MEM_INDEX ((env->uncached_cpsr & CPSR_M) == ARM_CPU_MODE_USR)
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64 | #elif defined (TARGET_SH4)
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65 | #define CPU_MEM_INDEX ((env->sr & SR_MD) == 0)
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66 | #else
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67 | #error unsupported CPU
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68 | #endif
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69 | #define MMUSUFFIX _mmu
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70 |
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71 | #elif ACCESS_TYPE == 3
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72 |
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73 | #ifdef TARGET_I386
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74 | #define CPU_MEM_INDEX ((env->hflags & HF_CPL_MASK) == 3)
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75 | #elif defined (TARGET_PPC)
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76 | #define CPU_MEM_INDEX (msr_pr)
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77 | #elif defined (TARGET_MIPS)
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78 | #define CPU_MEM_INDEX ((env->hflags & MIPS_HFLAG_MODE) == MIPS_HFLAG_UM)
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79 | #elif defined (TARGET_SPARC)
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80 | #define CPU_MEM_INDEX ((env->psrs) == 0)
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81 | #elif defined (TARGET_ARM)
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82 | #define CPU_MEM_INDEX ((env->uncached_cpsr & CPSR_M) == ARM_CPU_MODE_USR)
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83 | #elif defined (TARGET_SH4)
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84 | #define CPU_MEM_INDEX ((env->sr & SR_MD) == 0)
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85 | #else
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86 | #error unsupported CPU
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87 | #endif
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88 | #define MMUSUFFIX _cmmu
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89 |
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90 | #else
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91 | #error invalid ACCESS_TYPE
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92 | #endif
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93 |
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94 | #if DATA_SIZE == 8
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95 | #define RES_TYPE uint64_t
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96 | #else
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97 | #define RES_TYPE int
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98 | #endif
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99 |
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100 | #if ACCESS_TYPE == 3
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101 | #define ADDR_READ addr_code
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102 | #else
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103 | #define ADDR_READ addr_read
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104 | #endif
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105 |
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106 | DATA_TYPE REGPARM(1) glue(glue(__ld, SUFFIX), MMUSUFFIX)(target_ulong addr,
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107 | int is_user);
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108 | void REGPARM(2) glue(glue(__st, SUFFIX), MMUSUFFIX)(target_ulong addr, DATA_TYPE v, int is_user);
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109 |
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110 | #if (DATA_SIZE <= 4) && (TARGET_LONG_BITS == 32) && defined(__i386__) && \
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111 | (ACCESS_TYPE <= 1) && defined(ASM_SOFTMMU)
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112 |
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113 | #define CPU_TLB_ENTRY_BITS 4
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114 |
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115 | static inline RES_TYPE glue(glue(ld, USUFFIX), MEMSUFFIX)(target_ulong ptr)
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116 | {
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117 | int res;
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118 |
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119 | asm volatile ("movl %1, %%edx\n"
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120 | "movl %1, %%eax\n"
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121 | "shrl %3, %%edx\n"
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122 | "andl %4, %%eax\n"
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123 | "andl %2, %%edx\n"
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124 | "leal %5(%%edx, %%ebp), %%edx\n"
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125 | "cmpl (%%edx), %%eax\n"
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126 | "movl %1, %%eax\n"
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127 | "je 1f\n"
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128 | "pushl %6\n"
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129 | "call %7\n"
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130 | "popl %%edx\n"
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131 | "movl %%eax, %0\n"
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132 | "jmp 2f\n"
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133 | "1:\n"
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134 | "addl 12(%%edx), %%eax\n"
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135 | #if DATA_SIZE == 1
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136 | "movzbl (%%eax), %0\n"
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137 | #elif DATA_SIZE == 2
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138 | "movzwl (%%eax), %0\n"
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139 | #elif DATA_SIZE == 4
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140 | "movl (%%eax), %0\n"
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141 | #else
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142 | #error unsupported size
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143 | #endif
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144 | "2:\n"
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145 | : "=r" (res)
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146 | : "r" (ptr),
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147 | "i" ((CPU_TLB_SIZE - 1) << CPU_TLB_ENTRY_BITS),
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148 | "i" (TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS),
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149 | "i" (TARGET_PAGE_MASK | (DATA_SIZE - 1)),
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150 | "m" (*(uint32_t *)offsetof(CPUState, tlb_table[CPU_MEM_INDEX][0].addr_read)),
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151 | "i" (CPU_MEM_INDEX),
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152 | "m" (*(uint8_t *)&glue(glue(__ld, SUFFIX), MMUSUFFIX))
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153 | : "%eax", "%ecx", "%edx", "memory", "cc");
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154 | return res;
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155 | }
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156 |
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157 | #if DATA_SIZE <= 2
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158 | static inline int glue(glue(lds, SUFFIX), MEMSUFFIX)(target_ulong ptr)
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159 | {
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160 | int res;
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161 |
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162 | asm volatile ("movl %1, %%edx\n"
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163 | "movl %1, %%eax\n"
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164 | "shrl %3, %%edx\n"
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165 | "andl %4, %%eax\n"
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166 | "andl %2, %%edx\n"
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167 | "leal %5(%%edx, %%ebp), %%edx\n"
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168 | "cmpl (%%edx), %%eax\n"
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169 | "movl %1, %%eax\n"
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170 | "je 1f\n"
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171 | "pushl %6\n"
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172 | "call %7\n"
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173 | "popl %%edx\n"
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174 | #if DATA_SIZE == 1
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175 | "movsbl %%al, %0\n"
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176 | #elif DATA_SIZE == 2
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177 | "movswl %%ax, %0\n"
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178 | #else
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179 | #error unsupported size
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180 | #endif
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181 | "jmp 2f\n"
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182 | "1:\n"
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183 | "addl 12(%%edx), %%eax\n"
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184 | #if DATA_SIZE == 1
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185 | "movsbl (%%eax), %0\n"
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186 | #elif DATA_SIZE == 2
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187 | "movswl (%%eax), %0\n"
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188 | #else
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189 | #error unsupported size
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190 | #endif
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191 | "2:\n"
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192 | : "=r" (res)
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193 | : "r" (ptr),
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194 | "i" ((CPU_TLB_SIZE - 1) << CPU_TLB_ENTRY_BITS),
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195 | "i" (TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS),
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196 | "i" (TARGET_PAGE_MASK | (DATA_SIZE - 1)),
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197 | "m" (*(uint32_t *)offsetof(CPUState, tlb_table[CPU_MEM_INDEX][0].addr_read)),
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198 | "i" (CPU_MEM_INDEX),
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199 | "m" (*(uint8_t *)&glue(glue(__ld, SUFFIX), MMUSUFFIX))
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200 | : "%eax", "%ecx", "%edx", "memory", "cc");
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201 | return res;
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202 | }
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203 | #endif
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204 |
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205 | #ifdef VBOX
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206 | /* generic store macro */
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207 |
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208 | static inline void glue(glue(st, SUFFIX), MEMSUFFIX)(target_ulong ptr, RES_TYPE v)
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209 | {
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210 | int index;
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211 | target_ulong addr;
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212 | unsigned long physaddr;
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213 | int is_user;
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214 |
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215 | addr = ptr;
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216 | index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
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217 | is_user = CPU_MEM_INDEX;
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218 | if (__builtin_expect(env->tlb_table[is_user][index].addr_write !=
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219 | (addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))), 0)) {
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220 | glue(glue(__st, SUFFIX), MMUSUFFIX)(addr, v, is_user);
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221 | } else {
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222 | physaddr = addr + env->tlb_table[is_user][index].addend;
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223 | glue(glue(st, SUFFIX), _raw)((uint8_t *)physaddr, v);
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224 | }
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225 | }
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226 |
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227 | #else /* !VBOX */
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228 |
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229 | static inline void glue(glue(st, SUFFIX), MEMSUFFIX)(target_ulong ptr, RES_TYPE v)
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230 | {
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231 | asm volatile ("movl %0, %%edx\n"
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232 | "movl %0, %%eax\n"
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233 | "shrl %3, %%edx\n"
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234 | "andl %4, %%eax\n"
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235 | "andl %2, %%edx\n"
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236 | "leal %5(%%edx, %%ebp), %%edx\n"
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237 | "cmpl (%%edx), %%eax\n"
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238 | "movl %0, %%eax\n"
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239 | "je 1f\n"
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240 | #if DATA_SIZE == 1
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241 | "movzbl %b1, %%edx\n"
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242 | #elif DATA_SIZE == 2
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243 | "movzwl %w1, %%edx\n"
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244 | #elif DATA_SIZE == 4
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245 | "movl %1, %%edx\n"
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246 | #else
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247 | #error unsupported size
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248 | #endif
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249 | "pushl %6\n"
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250 | "call %7\n"
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251 | "popl %%eax\n"
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252 | "jmp 2f\n"
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253 | "1:\n"
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254 | "addl 8(%%edx), %%eax\n"
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255 | #if DATA_SIZE == 1
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256 | "movb %b1, (%%eax)\n"
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257 | #elif DATA_SIZE == 2
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258 | "movw %w1, (%%eax)\n"
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259 | #elif DATA_SIZE == 4
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260 | "movl %1, (%%eax)\n"
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261 | #else
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262 | #error unsupported size
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263 | #endif
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264 | "2:\n"
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265 | :
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266 | : "r" (ptr),
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267 | /* NOTE: 'q' would be needed as constraint, but we could not use it
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268 | with T1 ! */
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269 | "r" (v),
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270 | "i" ((CPU_TLB_SIZE - 1) << CPU_TLB_ENTRY_BITS),
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271 | "i" (TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS),
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272 | "i" (TARGET_PAGE_MASK | (DATA_SIZE - 1)),
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273 | "m" (*(uint32_t *)offsetof(CPUState, tlb_table[CPU_MEM_INDEX][0].addr_write)),
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274 | "i" (CPU_MEM_INDEX),
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275 | "m" (*(uint8_t *)&glue(glue(__st, SUFFIX), MMUSUFFIX))
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276 | : "%eax", "%ecx", "%edx", "memory", "cc");
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277 | }
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278 | #endif /* !VBOX */
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279 |
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280 | #else
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281 |
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282 | /* generic load/store macros */
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283 |
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284 | static inline RES_TYPE glue(glue(ld, USUFFIX), MEMSUFFIX)(target_ulong ptr)
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285 | {
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286 | int index;
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287 | RES_TYPE res;
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288 | target_ulong addr;
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289 | unsigned long physaddr;
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290 | int is_user;
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291 |
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292 | addr = ptr;
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293 | index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
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294 | is_user = CPU_MEM_INDEX;
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295 | if (__builtin_expect(env->tlb_table[is_user][index].ADDR_READ !=
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296 | (addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))), 0)) {
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297 | res = glue(glue(__ld, SUFFIX), MMUSUFFIX)(addr, is_user);
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298 | } else {
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299 | physaddr = addr + env->tlb_table[is_user][index].addend;
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300 | res = glue(glue(ld, USUFFIX), _raw)((uint8_t *)physaddr);
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301 | }
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302 | return res;
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303 | }
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304 |
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305 | #if DATA_SIZE <= 2
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306 | static inline int glue(glue(lds, SUFFIX), MEMSUFFIX)(target_ulong ptr)
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307 | {
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308 | int res, index;
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309 | target_ulong addr;
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310 | unsigned long physaddr;
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311 | int is_user;
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312 |
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313 | addr = ptr;
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314 | index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
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315 | is_user = CPU_MEM_INDEX;
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316 | if (__builtin_expect(env->tlb_table[is_user][index].ADDR_READ !=
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317 | (addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))), 0)) {
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318 | res = (DATA_STYPE)glue(glue(__ld, SUFFIX), MMUSUFFIX)(addr, is_user);
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319 | } else {
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320 | physaddr = addr + env->tlb_table[is_user][index].addend;
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321 | res = glue(glue(lds, SUFFIX), _raw)((uint8_t *)physaddr);
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322 | }
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323 | return res;
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324 | }
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325 | #endif
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326 |
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327 | #if ACCESS_TYPE != 3
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328 |
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329 | /* generic store macro */
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330 |
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331 | static inline void glue(glue(st, SUFFIX), MEMSUFFIX)(target_ulong ptr, RES_TYPE v)
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332 | {
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333 | int index;
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334 | target_ulong addr;
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335 | unsigned long physaddr;
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336 | int is_user;
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337 |
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338 | addr = ptr;
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339 | index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
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340 | is_user = CPU_MEM_INDEX;
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341 | if (__builtin_expect(env->tlb_table[is_user][index].addr_write !=
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342 | (addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))), 0)) {
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343 | glue(glue(__st, SUFFIX), MMUSUFFIX)(addr, v, is_user);
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344 | } else {
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345 | physaddr = addr + env->tlb_table[is_user][index].addend;
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346 | glue(glue(st, SUFFIX), _raw)((uint8_t *)physaddr, v);
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347 | }
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348 | }
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349 |
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350 | #endif /* ACCESS_TYPE != 3 */
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351 |
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352 | #endif /* !asm */
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353 |
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354 | #if ACCESS_TYPE != 3
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355 |
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356 | #if DATA_SIZE == 8
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357 | static inline float64 glue(ldfq, MEMSUFFIX)(target_ulong ptr)
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358 | {
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359 | union {
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360 | float64 d;
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361 | uint64_t i;
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362 | } u;
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363 | u.i = glue(ldq, MEMSUFFIX)(ptr);
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364 | return u.d;
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365 | }
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366 |
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367 | static inline void glue(stfq, MEMSUFFIX)(target_ulong ptr, float64 v)
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368 | {
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369 | union {
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370 | float64 d;
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371 | uint64_t i;
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372 | } u;
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373 | u.d = v;
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374 | glue(stq, MEMSUFFIX)(ptr, u.i);
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375 | }
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376 | #endif /* DATA_SIZE == 8 */
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377 |
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378 | #if DATA_SIZE == 4
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379 | static inline float32 glue(ldfl, MEMSUFFIX)(target_ulong ptr)
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380 | {
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381 | union {
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382 | float32 f;
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383 | uint32_t i;
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384 | } u;
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385 | u.i = glue(ldl, MEMSUFFIX)(ptr);
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386 | return u.f;
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387 | }
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388 |
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389 | static inline void glue(stfl, MEMSUFFIX)(target_ulong ptr, float32 v)
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390 | {
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391 | union {
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392 | float32 f;
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393 | uint32_t i;
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394 | } u;
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395 | u.f = v;
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396 | glue(stl, MEMSUFFIX)(ptr, u.i);
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397 | }
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398 | #endif /* DATA_SIZE == 4 */
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399 |
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400 | #endif /* ACCESS_TYPE != 3 */
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401 |
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402 | #undef RES_TYPE
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403 | #undef DATA_TYPE
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404 | #undef DATA_STYPE
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405 | #undef SUFFIX
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406 | #undef USUFFIX
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407 | #undef DATA_SIZE
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408 | #undef CPU_MEM_INDEX
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409 | #undef MMUSUFFIX
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410 | #undef ADDR_READ
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