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annotate third_party/luajit/src/lj_def.h @ 279:b3b547563ec7

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Add Google connector service and agent wiki Implement the C/Seobeo Google Drive and Gmail connector with encrypted OAuth storage, Zenbu authentication, browser testing, AI tool discovery, chunked HTTP decoding, and Bazel coverage. Consolidate repository guidance into progressive wiki documentation and enforce arena-first allocation for new first-party C code. Co-authored-by: Copilot <[email protected]> Copilot-Session: 84c338fd-0939-4bb3-b7f3-1062eb213e5d
author MrJuneJune <me@mrjunejune.com>
date Mon, 17 Aug 2026 22:22:36 -0700
parents 94705b5986b3
children
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178
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1 /*
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2 ** LuaJIT common internal definitions.
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3 ** Copyright (C) 2005-2023 Mike Pall. See Copyright Notice in luajit.h
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4 */
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5
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6 #ifndef _LJ_DEF_H
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7 #define _LJ_DEF_H
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8
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9 #include "lua.h"
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10
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11 #if defined(_MSC_VER) && (_MSC_VER < 1700)
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12 /* Old MSVC is stuck in the last century and doesn't have C99's stdint.h. */
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13 typedef __int8 int8_t;
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14 typedef __int16 int16_t;
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15 typedef __int32 int32_t;
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16 typedef __int64 int64_t;
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17 typedef unsigned __int8 uint8_t;
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18 typedef unsigned __int16 uint16_t;
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19 typedef unsigned __int32 uint32_t;
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20 typedef unsigned __int64 uint64_t;
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21 #ifdef _WIN64
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22 typedef __int64 intptr_t;
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23 typedef unsigned __int64 uintptr_t;
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24 #else
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25 typedef __int32 intptr_t;
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26 typedef unsigned __int32 uintptr_t;
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27 #endif
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28 #elif defined(__symbian__)
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29 /* Cough. */
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30 typedef signed char int8_t;
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31 typedef short int int16_t;
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32 typedef int int32_t;
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33 typedef long long int64_t;
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34 typedef unsigned char uint8_t;
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35 typedef unsigned short int uint16_t;
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36 typedef unsigned int uint32_t;
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37 typedef unsigned long long uint64_t;
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38 typedef int intptr_t;
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39 typedef unsigned int uintptr_t;
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40 #else
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41 #include <stdint.h>
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42 #endif
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43
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44 /* Needed everywhere. */
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45 #include <string.h>
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46 #include <stdlib.h>
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47
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48 /* Various VM limits. */
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49 #define LJ_MAX_MEM32 0x7fffff00 /* Max. 32 bit memory allocation. */
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50 #define LJ_MAX_MEM64 ((uint64_t)1<<47) /* Max. 64 bit memory allocation. */
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51 /* Max. total memory allocation. */
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52 #define LJ_MAX_MEM (LJ_GC64 ? LJ_MAX_MEM64 : LJ_MAX_MEM32)
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53 #define LJ_MAX_ALLOC LJ_MAX_MEM /* Max. individual allocation length. */
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54 #define LJ_MAX_STR LJ_MAX_MEM32 /* Max. string length. */
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55 #define LJ_MAX_BUF LJ_MAX_MEM32 /* Max. buffer length. */
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56 #define LJ_MAX_UDATA LJ_MAX_MEM32 /* Max. userdata length. */
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57
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58 #define LJ_MAX_STRTAB (1<<26) /* Max. string table size. */
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59 #define LJ_MAX_HBITS 26 /* Max. hash bits. */
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60 #define LJ_MAX_ABITS 28 /* Max. bits of array key. */
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61 #define LJ_MAX_ASIZE ((1<<(LJ_MAX_ABITS-1))+1) /* Max. array part size. */
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62 #define LJ_MAX_COLOSIZE 16 /* Max. elems for colocated array. */
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63
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64 #define LJ_MAX_LINE LJ_MAX_MEM32 /* Max. source code line number. */
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65 #define LJ_MAX_XLEVEL 200 /* Max. syntactic nesting level. */
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66 #define LJ_MAX_BCINS (1<<26) /* Max. # of bytecode instructions. */
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67 #define LJ_MAX_SLOTS 250 /* Max. # of slots in a Lua func. */
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68 #define LJ_MAX_LOCVAR 200 /* Max. # of local variables. */
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69 #define LJ_MAX_UPVAL 60 /* Max. # of upvalues. */
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70
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71 #define LJ_MAX_IDXCHAIN 100 /* __index/__newindex chain limit. */
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72 #define LJ_STACK_EXTRA (5+2*LJ_FR2) /* Extra stack space (metamethods). */
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73
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74 #define LJ_NUM_CBPAGE 1 /* Number of FFI callback pages. */
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75
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76 /* Minimum table/buffer sizes. */
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77 #define LJ_MIN_GLOBAL 6 /* Min. global table size (hbits). */
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78 #define LJ_MIN_REGISTRY 2 /* Min. registry size (hbits). */
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79 #define LJ_MIN_STRTAB 256 /* Min. string table size (pow2). */
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80 #define LJ_MIN_SBUF 32 /* Min. string buffer length. */
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81 #define LJ_MIN_VECSZ 8 /* Min. size for growable vectors. */
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82 #define LJ_MIN_IRSZ 32 /* Min. size for growable IR. */
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83
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84 /* JIT compiler limits. */
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85 #define LJ_MAX_JSLOTS 250 /* Max. # of stack slots for a trace. */
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86 #define LJ_MAX_PHI 64 /* Max. # of PHIs for a loop. */
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87 #define LJ_MAX_EXITSTUBGR 16 /* Max. # of exit stub groups. */
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88
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89 /* Various macros. */
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90 #ifndef UNUSED
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91 #define UNUSED(x) ((void)(x)) /* to avoid warnings */
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92 #endif
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93
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94 #define U64x(hi, lo) (((uint64_t)0x##hi << 32) + (uint64_t)0x##lo)
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95 #define i32ptr(p) ((int32_t)(intptr_t)(void *)(p))
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96 #define u32ptr(p) ((uint32_t)(intptr_t)(void *)(p))
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97 #define i64ptr(p) ((int64_t)(intptr_t)(void *)(p))
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98 #define u64ptr(p) ((uint64_t)(intptr_t)(void *)(p))
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99 #define igcptr(p) (LJ_GC64 ? i64ptr(p) : i32ptr(p))
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100
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101 #define checki8(x) ((x) == (int32_t)(int8_t)(x))
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102 #define checku8(x) ((x) == (int32_t)(uint8_t)(x))
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103 #define checki16(x) ((x) == (int32_t)(int16_t)(x))
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104 #define checku16(x) ((x) == (int32_t)(uint16_t)(x))
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105 #define checki32(x) ((x) == (int32_t)(x))
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106 #define checku32(x) ((x) == (uint32_t)(x))
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107 #define checkptr31(x) (((uint64_t)(uintptr_t)(x) >> 31) == 0)
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108 #define checkptr32(x) ((uintptr_t)(x) == (uint32_t)(uintptr_t)(x))
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109 #define checkptr47(x) (((uint64_t)(uintptr_t)(x) >> 47) == 0)
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110 #define checkptrGC(x) (LJ_GC64 ? checkptr47((x)) : LJ_64 ? checkptr31((x)) :1)
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111
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112 /* Every half-decent C compiler transforms this into a rotate instruction. */
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113 #define lj_rol(x, n) (((x)<<(n)) | ((x)>>(-(int)(n)&(8*sizeof(x)-1))))
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114 #define lj_ror(x, n) (((x)<<(-(int)(n)&(8*sizeof(x)-1))) | ((x)>>(n)))
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115
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116 /* A really naive Bloom filter. But sufficient for our needs. */
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117 typedef uintptr_t BloomFilter;
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118 #define BLOOM_MASK (8*sizeof(BloomFilter) - 1)
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119 #define bloombit(x) ((uintptr_t)1 << ((x) & BLOOM_MASK))
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120 #define bloomset(b, x) ((b) |= bloombit((x)))
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121 #define bloomtest(b, x) ((b) & bloombit((x)))
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122
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123 #if defined(__GNUC__) || defined(__clang__) || defined(__psp2__)
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124
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125 #define LJ_NORET __attribute__((noreturn))
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126 #define LJ_ALIGN(n) __attribute__((aligned(n)))
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127 #define LJ_INLINE inline
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128 #define LJ_AINLINE inline __attribute__((always_inline))
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129 #define LJ_NOINLINE __attribute__((noinline))
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130
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131 #if defined(__ELF__) || defined(__MACH__) || defined(__psp2__)
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132 #if !((defined(__sun__) && defined(__svr4__)) || defined(__CELLOS_LV2__))
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133 #define LJ_NOAPI extern __attribute__((visibility("hidden")))
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134 #endif
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135 #endif
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136
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137 /* Note: it's only beneficial to use fastcall on x86 and then only for up to
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138 ** two non-FP args. The amalgamated compile covers all LJ_FUNC cases. Only
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139 ** indirect calls and related tail-called C functions are marked as fastcall.
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140 */
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141 #if defined(__i386__)
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142 #define LJ_FASTCALL __attribute__((fastcall))
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143 #endif
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144
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145 #define LJ_LIKELY(x) __builtin_expect(!!(x), 1)
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146 #define LJ_UNLIKELY(x) __builtin_expect(!!(x), 0)
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147
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148 #define lj_ffs(x) ((uint32_t)__builtin_ctz(x))
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149 /* Don't ask ... */
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150 #if defined(__INTEL_COMPILER) && (defined(__i386__) || defined(__x86_64__))
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151 static LJ_AINLINE uint32_t lj_fls(uint32_t x)
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152 {
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153 uint32_t r; __asm__("bsrl %1, %0" : "=r" (r) : "rm" (x) : "cc"); return r;
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154 }
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155 #else
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156 #define lj_fls(x) ((uint32_t)(__builtin_clz(x)^31))
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157 #endif
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158
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159 #if defined(__arm__)
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160 static LJ_AINLINE uint32_t lj_bswap(uint32_t x)
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161 {
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162 #if defined(__psp2__)
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163 return __builtin_rev(x);
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164 #else
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165 uint32_t r;
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166 #if __ARM_ARCH_6__ || __ARM_ARCH_6J__ || __ARM_ARCH_6T2__ || __ARM_ARCH_6Z__ ||\
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167 __ARM_ARCH_6ZK__ || __ARM_ARCH_7__ || __ARM_ARCH_7A__ || __ARM_ARCH_7R__
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168 __asm__("rev %0, %1" : "=r" (r) : "r" (x));
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169 return r;
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170 #else
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171 #ifdef __thumb__
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172 r = x ^ lj_ror(x, 16);
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173 #else
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174 __asm__("eor %0, %1, %1, ror #16" : "=r" (r) : "r" (x));
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175 #endif
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176 return ((r & 0xff00ffffu) >> 8) ^ lj_ror(x, 8);
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177 #endif
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178 #endif
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179 }
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180
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181 static LJ_AINLINE uint64_t lj_bswap64(uint64_t x)
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182 {
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183 return ((uint64_t)lj_bswap((uint32_t)x)<<32) | lj_bswap((uint32_t)(x>>32));
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184 }
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185 #elif (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) || __clang__
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186 static LJ_AINLINE uint32_t lj_bswap(uint32_t x)
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187 {
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188 return (uint32_t)__builtin_bswap32((int32_t)x);
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189 }
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190
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191 static LJ_AINLINE uint64_t lj_bswap64(uint64_t x)
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192 {
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193 return (uint64_t)__builtin_bswap64((int64_t)x);
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194 }
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195 #elif defined(__i386__) || defined(__x86_64__)
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196 static LJ_AINLINE uint32_t lj_bswap(uint32_t x)
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197 {
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198 uint32_t r; __asm__("bswap %0" : "=r" (r) : "0" (x)); return r;
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199 }
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200
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201 #if defined(__i386__)
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202 static LJ_AINLINE uint64_t lj_bswap64(uint64_t x)
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203 {
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204 return ((uint64_t)lj_bswap((uint32_t)x)<<32) | lj_bswap((uint32_t)(x>>32));
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205 }
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206 #else
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207 static LJ_AINLINE uint64_t lj_bswap64(uint64_t x)
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208 {
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209 uint64_t r; __asm__("bswap %0" : "=r" (r) : "0" (x)); return r;
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210 }
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211 #endif
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212 #else
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213 static LJ_AINLINE uint32_t lj_bswap(uint32_t x)
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214 {
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215 return (x << 24) | ((x & 0xff00) << 8) | ((x >> 8) & 0xff00) | (x >> 24);
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216 }
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217
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218 static LJ_AINLINE uint64_t lj_bswap64(uint64_t x)
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219 {
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220 return (uint64_t)lj_bswap((uint32_t)(x >> 32)) |
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221 ((uint64_t)lj_bswap((uint32_t)x) << 32);
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222 }
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223 #endif
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224
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225 typedef union __attribute__((packed)) Unaligned16 {
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226 uint16_t u;
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227 uint8_t b[2];
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228 } Unaligned16;
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229
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230 typedef union __attribute__((packed)) Unaligned32 {
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231 uint32_t u;
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232 uint8_t b[4];
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233 } Unaligned32;
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234
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235 /* Unaligned load of uint16_t. */
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236 static LJ_AINLINE uint16_t lj_getu16(const void *p)
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237 {
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238 return ((const Unaligned16 *)p)->u;
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239 }
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240
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diff changeset
241 /* Unaligned load of uint32_t. */
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diff changeset
242 static LJ_AINLINE uint32_t lj_getu32(const void *p)
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243 {
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244 return ((const Unaligned32 *)p)->u;
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245 }
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246
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247 #elif defined(_MSC_VER)
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248
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249 #define LJ_NORET __declspec(noreturn)
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250 #define LJ_ALIGN(n) __declspec(align(n))
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251 #define LJ_INLINE __inline
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252 #define LJ_AINLINE __forceinline
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253 #define LJ_NOINLINE __declspec(noinline)
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254 #if defined(_M_IX86)
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255 #define LJ_FASTCALL __fastcall
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256 #endif
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257
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258 #ifdef _M_PPC
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259 unsigned int _CountLeadingZeros(long);
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260 #pragma intrinsic(_CountLeadingZeros)
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261 static LJ_AINLINE uint32_t lj_fls(uint32_t x)
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262 {
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263 return _CountLeadingZeros(x) ^ 31;
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264 }
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265 #else
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266 unsigned char _BitScanForward(unsigned long *, unsigned long);
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267 unsigned char _BitScanReverse(unsigned long *, unsigned long);
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268 #pragma intrinsic(_BitScanForward)
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269 #pragma intrinsic(_BitScanReverse)
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270
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271 static LJ_AINLINE uint32_t lj_ffs(uint32_t x)
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272 {
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273 unsigned long r; _BitScanForward(&r, x); return (uint32_t)r;
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274 }
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275
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276 static LJ_AINLINE uint32_t lj_fls(uint32_t x)
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277 {
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278 unsigned long r; _BitScanReverse(&r, x); return (uint32_t)r;
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279 }
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280 #endif
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281
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282 unsigned long _byteswap_ulong(unsigned long);
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283 uint64_t _byteswap_uint64(uint64_t);
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284 #define lj_bswap(x) (_byteswap_ulong((x)))
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285 #define lj_bswap64(x) (_byteswap_uint64((x)))
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286
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287 #if defined(_M_PPC) && defined(LUAJIT_NO_UNALIGNED)
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288 /*
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289 ** Replacement for unaligned loads on Xbox 360. Disabled by default since it's
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290 ** usually more costly than the occasional stall when crossing a cache-line.
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291 */
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292 static LJ_AINLINE uint16_t lj_getu16(const void *v)
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293 {
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294 const uint8_t *p = (const uint8_t *)v;
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295 return (uint16_t)((p[0]<<8) | p[1]);
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296 }
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297 static LJ_AINLINE uint32_t lj_getu32(const void *v)
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298 {
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299 const uint8_t *p = (const uint8_t *)v;
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300 return (uint32_t)((p[0]<<24) | (p[1]<<16) | (p[2]<<8) | p[3]);
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301 }
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302 #else
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303 /* Unaligned loads are generally ok on x86/x64. */
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304 #define lj_getu16(p) (*(uint16_t *)(p))
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305 #define lj_getu32(p) (*(uint32_t *)(p))
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306 #endif
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307
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308 #else
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309 #error "missing defines for your compiler"
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310 #endif
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311
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312 /* Optional defines. */
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313 #ifndef LJ_FASTCALL
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314 #define LJ_FASTCALL
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315 #endif
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316 #ifndef LJ_NORET
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317 #define LJ_NORET
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318 #endif
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319 #ifndef LJ_NOAPI
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320 #define LJ_NOAPI extern
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321 #endif
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322 #ifndef LJ_LIKELY
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323 #define LJ_LIKELY(x) (x)
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324 #define LJ_UNLIKELY(x) (x)
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325 #endif
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326
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327 /* Attributes for internal functions. */
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328 #define LJ_DATA LJ_NOAPI
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329 #define LJ_DATADEF
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330 #define LJ_ASMF LJ_NOAPI
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331 #define LJ_FUNCA LJ_NOAPI
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332 #if defined(ljamalg_c)
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333 #define LJ_FUNC static
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334 #else
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335 #define LJ_FUNC LJ_NOAPI
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336 #endif
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337 #define LJ_FUNC_NORET LJ_FUNC LJ_NORET
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338 #define LJ_FUNCA_NORET LJ_FUNCA LJ_NORET
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339 #define LJ_ASMF_NORET LJ_ASMF LJ_NORET
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340
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341 /* Internal assertions. */
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342 #if defined(LUA_USE_ASSERT) || defined(LUA_USE_APICHECK)
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343 #define lj_assert_check(g, c, ...) \
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344 ((c) ? (void)0 : \
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345 (lj_assert_fail((g), __FILE__, __LINE__, __func__, __VA_ARGS__), 0))
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346 #define lj_checkapi(c, ...) lj_assert_check(G(L), (c), __VA_ARGS__)
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347 #else
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348 #define lj_checkapi(c, ...) ((void)L)
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349 #endif
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350
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351 #ifdef LUA_USE_ASSERT
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352 #define lj_assertG_(g, c, ...) lj_assert_check((g), (c), __VA_ARGS__)
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353 #define lj_assertG(c, ...) lj_assert_check(g, (c), __VA_ARGS__)
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354 #define lj_assertL(c, ...) lj_assert_check(G(L), (c), __VA_ARGS__)
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355 #define lj_assertX(c, ...) lj_assert_check(NULL, (c), __VA_ARGS__)
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356 #define check_exp(c, e) (lj_assertX((c), #c), (e))
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357 #else
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358 #define lj_assertG_(g, c, ...) ((void)0)
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359 #define lj_assertG(c, ...) ((void)g)
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360 #define lj_assertL(c, ...) ((void)L)
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361 #define lj_assertX(c, ...) ((void)0)
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362 #define check_exp(c, e) (e)
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363 #endif
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364
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diff changeset
365 /* Static assertions. */
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366 #define LJ_ASSERT_NAME2(name, line) name ## line
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367 #define LJ_ASSERT_NAME(line) LJ_ASSERT_NAME2(lj_assert_, line)
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368 #ifdef __COUNTER__
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369 #define LJ_STATIC_ASSERT(cond) \
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370 extern void LJ_ASSERT_NAME(__COUNTER__)(int STATIC_ASSERTION_FAILED[(cond)?1:-1])
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371 #else
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372 #define LJ_STATIC_ASSERT(cond) \
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373 extern void LJ_ASSERT_NAME(__LINE__)(int STATIC_ASSERTION_FAILED[(cond)?1:-1])
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374 #endif
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375
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376 /* PRNG state. Need this here, details in lj_prng.h. */
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377 typedef struct PRNGState {
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378 uint64_t u[4];
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379 } PRNGState;
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380
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381 #endif