forked from mia/Aegisub
354 lines
10 KiB
C
354 lines
10 KiB
C
/*
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** LuaJIT common internal definitions.
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** Copyright (C) 2005-2017 Mike Pall. See Copyright Notice in luajit.h
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*/
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#ifndef _LJ_DEF_H
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#define _LJ_DEF_H
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#include "lua.h"
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#if defined(_MSC_VER)
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/* MSVC is stuck in the last century and doesn't have C99's stdint.h. */
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typedef __int8 int8_t;
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typedef __int16 int16_t;
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typedef __int32 int32_t;
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typedef __int64 int64_t;
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typedef unsigned __int8 uint8_t;
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typedef unsigned __int16 uint16_t;
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typedef unsigned __int32 uint32_t;
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typedef unsigned __int64 uint64_t;
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#ifdef _WIN64
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typedef __int64 intptr_t;
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typedef unsigned __int64 uintptr_t;
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#else
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typedef __int32 intptr_t;
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typedef unsigned __int32 uintptr_t;
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#endif
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#elif defined(__symbian__)
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/* Cough. */
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typedef signed char int8_t;
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typedef short int int16_t;
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typedef int int32_t;
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typedef long long int64_t;
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typedef unsigned char uint8_t;
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typedef unsigned short int uint16_t;
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typedef unsigned int uint32_t;
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typedef unsigned long long uint64_t;
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typedef int intptr_t;
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typedef unsigned int uintptr_t;
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#else
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#include <stdint.h>
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#endif
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/* Needed everywhere. */
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#include <string.h>
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#include <stdlib.h>
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/* Various VM limits. */
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#define LJ_MAX_MEM 0x7fffff00 /* Max. total memory allocation. */
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#define LJ_MAX_ALLOC LJ_MAX_MEM /* Max. individual allocation length. */
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#define LJ_MAX_STR LJ_MAX_MEM /* Max. string length. */
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#define LJ_MAX_UDATA LJ_MAX_MEM /* Max. userdata length. */
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#define LJ_MAX_STRTAB (1<<26) /* Max. string table size. */
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#define LJ_MAX_HBITS 26 /* Max. hash bits. */
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#define LJ_MAX_ABITS 28 /* Max. bits of array key. */
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#define LJ_MAX_ASIZE ((1<<(LJ_MAX_ABITS-1))+1) /* Max. array part size. */
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#define LJ_MAX_COLOSIZE 16 /* Max. elems for colocated array. */
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#define LJ_MAX_LINE LJ_MAX_MEM /* Max. source code line number. */
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#define LJ_MAX_XLEVEL 200 /* Max. syntactic nesting level. */
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#define LJ_MAX_BCINS (1<<26) /* Max. # of bytecode instructions. */
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#define LJ_MAX_SLOTS 250 /* Max. # of slots in a Lua func. */
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#define LJ_MAX_LOCVAR 200 /* Max. # of local variables. */
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#define LJ_MAX_UPVAL 60 /* Max. # of upvalues. */
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#define LJ_MAX_IDXCHAIN 100 /* __index/__newindex chain limit. */
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#define LJ_STACK_EXTRA 5 /* Extra stack space (metamethods). */
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#define LJ_NUM_CBPAGE 1 /* Number of FFI callback pages. */
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/* Minimum table/buffer sizes. */
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#define LJ_MIN_GLOBAL 6 /* Min. global table size (hbits). */
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#define LJ_MIN_REGISTRY 2 /* Min. registry size (hbits). */
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#define LJ_MIN_STRTAB 256 /* Min. string table size (pow2). */
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#define LJ_MIN_SBUF 32 /* Min. string buffer length. */
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#define LJ_MIN_VECSZ 8 /* Min. size for growable vectors. */
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#define LJ_MIN_IRSZ 32 /* Min. size for growable IR. */
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#define LJ_MIN_K64SZ 16 /* Min. size for chained K64Array. */
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/* JIT compiler limits. */
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#define LJ_MAX_JSLOTS 250 /* Max. # of stack slots for a trace. */
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#define LJ_MAX_PHI 64 /* Max. # of PHIs for a loop. */
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#define LJ_MAX_EXITSTUBGR 16 /* Max. # of exit stub groups. */
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/* Various macros. */
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#ifndef UNUSED
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#define UNUSED(x) ((void)(x)) /* to avoid warnings */
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#endif
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#define U64x(hi, lo) (((uint64_t)0x##hi << 32) + (uint64_t)0x##lo)
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#define i32ptr(p) ((int32_t)(intptr_t)(void *)(p))
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#define u32ptr(p) ((uint32_t)(intptr_t)(void *)(p))
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#define checki8(x) ((x) == (int32_t)(int8_t)(x))
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#define checku8(x) ((x) == (int32_t)(uint8_t)(x))
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#define checki16(x) ((x) == (int32_t)(int16_t)(x))
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#define checku16(x) ((x) == (int32_t)(uint16_t)(x))
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#define checki32(x) ((x) == (int32_t)(x))
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#define checku32(x) ((x) == (uint32_t)(x))
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#define checkptr32(x) ((uintptr_t)(x) == (uint32_t)(uintptr_t)(x))
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/* Every half-decent C compiler transforms this into a rotate instruction. */
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#define lj_rol(x, n) (((x)<<(n)) | ((x)>>(-(int)(n)&(8*sizeof(x)-1))))
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#define lj_ror(x, n) (((x)<<(-(int)(n)&(8*sizeof(x)-1))) | ((x)>>(n)))
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/* A really naive Bloom filter. But sufficient for our needs. */
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typedef uintptr_t BloomFilter;
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#define BLOOM_MASK (8*sizeof(BloomFilter) - 1)
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#define bloombit(x) ((uintptr_t)1 << ((x) & BLOOM_MASK))
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#define bloomset(b, x) ((b) |= bloombit((x)))
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#define bloomtest(b, x) ((b) & bloombit((x)))
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#if defined(__GNUC__) || defined(__psp2__)
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#define LJ_NORET __attribute__((noreturn))
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#define LJ_ALIGN(n) __attribute__((aligned(n)))
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#define LJ_INLINE inline
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#define LJ_AINLINE inline __attribute__((always_inline))
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#define LJ_NOINLINE __attribute__((noinline))
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#if defined(__ELF__) || defined(__MACH__) || defined(__psp2__)
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#if !((defined(__sun__) && defined(__svr4__)) || defined(__CELLOS_LV2__))
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#define LJ_NOAPI extern __attribute__((visibility("hidden")))
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#endif
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#endif
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/* Note: it's only beneficial to use fastcall on x86 and then only for up to
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** two non-FP args. The amalgamated compile covers all LJ_FUNC cases. Only
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** indirect calls and related tail-called C functions are marked as fastcall.
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*/
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#if defined(__i386__)
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#define LJ_FASTCALL __attribute__((fastcall))
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#endif
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#define LJ_LIKELY(x) __builtin_expect(!!(x), 1)
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#define LJ_UNLIKELY(x) __builtin_expect(!!(x), 0)
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#define lj_ffs(x) ((uint32_t)__builtin_ctz(x))
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/* Don't ask ... */
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#if defined(__INTEL_COMPILER) && (defined(__i386__) || defined(__x86_64__))
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static LJ_AINLINE uint32_t lj_fls(uint32_t x)
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{
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uint32_t r; __asm__("bsrl %1, %0" : "=r" (r) : "rm" (x) : "cc"); return r;
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}
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#else
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#define lj_fls(x) ((uint32_t)(__builtin_clz(x)^31))
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#endif
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#if defined(__arm__)
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static LJ_AINLINE uint32_t lj_bswap(uint32_t x)
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{
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#if defined(__psp2__)
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return __builtin_rev(x);
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#else
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uint32_t r;
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#if __ARM_ARCH_6__ || __ARM_ARCH_6J__ || __ARM_ARCH_6T2__ || __ARM_ARCH_6Z__ ||\
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__ARM_ARCH_6ZK__ || __ARM_ARCH_7__ || __ARM_ARCH_7A__ || __ARM_ARCH_7R__
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__asm__("rev %0, %1" : "=r" (r) : "r" (x));
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return r;
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#else
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#ifdef __thumb__
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r = x ^ lj_ror(x, 16);
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#else
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__asm__("eor %0, %1, %1, ror #16" : "=r" (r) : "r" (x));
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#endif
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return ((r & 0xff00ffffu) >> 8) ^ lj_ror(x, 8);
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#endif
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#endif
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}
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static LJ_AINLINE uint64_t lj_bswap64(uint64_t x)
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{
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return ((uint64_t)lj_bswap((uint32_t)x)<<32) | lj_bswap((uint32_t)(x>>32));
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}
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#elif (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)
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static LJ_AINLINE uint32_t lj_bswap(uint32_t x)
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{
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return (uint32_t)__builtin_bswap32((int32_t)x);
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}
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static LJ_AINLINE uint64_t lj_bswap64(uint64_t x)
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{
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return (uint64_t)__builtin_bswap64((int64_t)x);
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}
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#elif defined(__i386__) || defined(__x86_64__)
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static LJ_AINLINE uint32_t lj_bswap(uint32_t x)
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{
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uint32_t r; __asm__("bswap %0" : "=r" (r) : "0" (x)); return r;
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}
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#if defined(__i386__)
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static LJ_AINLINE uint64_t lj_bswap64(uint64_t x)
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{
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return ((uint64_t)lj_bswap((uint32_t)x)<<32) | lj_bswap((uint32_t)(x>>32));
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}
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#else
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static LJ_AINLINE uint64_t lj_bswap64(uint64_t x)
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{
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uint64_t r; __asm__("bswap %0" : "=r" (r) : "0" (x)); return r;
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}
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#endif
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#else
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static LJ_AINLINE uint32_t lj_bswap(uint32_t x)
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{
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return (x << 24) | ((x & 0xff00) << 8) | ((x >> 8) & 0xff00) | (x >> 24);
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}
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static LJ_AINLINE uint64_t lj_bswap64(uint64_t x)
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{
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return (uint64_t)lj_bswap((uint32_t)(x >> 32)) |
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((uint64_t)lj_bswap((uint32_t)x) << 32);
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}
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#endif
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typedef union __attribute__((packed)) Unaligned16 {
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uint16_t u;
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uint8_t b[2];
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} Unaligned16;
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typedef union __attribute__((packed)) Unaligned32 {
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uint32_t u;
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uint8_t b[4];
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} Unaligned32;
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/* Unaligned load of uint16_t. */
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static LJ_AINLINE uint16_t lj_getu16(const void *p)
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{
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return ((const Unaligned16 *)p)->u;
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}
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/* Unaligned load of uint32_t. */
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static LJ_AINLINE uint32_t lj_getu32(const void *p)
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{
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return ((const Unaligned32 *)p)->u;
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}
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#elif defined(_MSC_VER)
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#define LJ_NORET __declspec(noreturn)
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#define LJ_ALIGN(n) __declspec(align(n))
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#define LJ_INLINE __inline
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#define LJ_AINLINE __forceinline
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#define LJ_NOINLINE __declspec(noinline)
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#if defined(_M_IX86)
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#define LJ_FASTCALL __fastcall
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#endif
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#ifdef _M_PPC
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unsigned int _CountLeadingZeros(long);
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#pragma intrinsic(_CountLeadingZeros)
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static LJ_AINLINE uint32_t lj_fls(uint32_t x)
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{
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return _CountLeadingZeros(x) ^ 31;
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}
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#else
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unsigned char _BitScanForward(uint32_t *, unsigned long);
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unsigned char _BitScanReverse(uint32_t *, unsigned long);
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#pragma intrinsic(_BitScanForward)
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#pragma intrinsic(_BitScanReverse)
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static LJ_AINLINE uint32_t lj_ffs(uint32_t x)
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{
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uint32_t r; _BitScanForward(&r, x); return r;
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}
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static LJ_AINLINE uint32_t lj_fls(uint32_t x)
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{
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uint32_t r; _BitScanReverse(&r, x); return r;
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}
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#endif
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unsigned long _byteswap_ulong(unsigned long);
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uint64_t _byteswap_uint64(uint64_t);
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#define lj_bswap(x) (_byteswap_ulong((x)))
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#define lj_bswap64(x) (_byteswap_uint64((x)))
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#if defined(_M_PPC) && defined(LUAJIT_NO_UNALIGNED)
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/*
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** Replacement for unaligned loads on Xbox 360. Disabled by default since it's
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** usually more costly than the occasional stall when crossing a cache-line.
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*/
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static LJ_AINLINE uint16_t lj_getu16(const void *v)
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{
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const uint8_t *p = (const uint8_t *)v;
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return (uint16_t)((p[0]<<8) | p[1]);
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}
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static LJ_AINLINE uint32_t lj_getu32(const void *v)
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{
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const uint8_t *p = (const uint8_t *)v;
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return (uint32_t)((p[0]<<24) | (p[1]<<16) | (p[2]<<8) | p[3]);
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}
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#else
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/* Unaligned loads are generally ok on x86/x64. */
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#define lj_getu16(p) (*(uint16_t *)(p))
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#define lj_getu32(p) (*(uint32_t *)(p))
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#endif
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#else
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#error "missing defines for your compiler"
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#endif
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/* Optional defines. */
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#ifndef LJ_FASTCALL
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#define LJ_FASTCALL
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#endif
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#ifndef LJ_NORET
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#define LJ_NORET
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#endif
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#ifndef LJ_NOAPI
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#define LJ_NOAPI extern
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#endif
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#ifndef LJ_LIKELY
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#define LJ_LIKELY(x) (x)
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#define LJ_UNLIKELY(x) (x)
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#endif
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/* Attributes for internal functions. */
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#define LJ_DATA LJ_NOAPI
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#define LJ_DATADEF
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#define LJ_ASMF LJ_NOAPI
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#define LJ_FUNCA LJ_NOAPI
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#if defined(ljamalg_c)
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#define LJ_FUNC static
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#else
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#define LJ_FUNC LJ_NOAPI
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#endif
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#define LJ_FUNC_NORET LJ_FUNC LJ_NORET
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#define LJ_FUNCA_NORET LJ_FUNCA LJ_NORET
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#define LJ_ASMF_NORET LJ_ASMF LJ_NORET
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/* Runtime assertions. */
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#ifdef lua_assert
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#define check_exp(c, e) (lua_assert(c), (e))
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#define api_check(l, e) lua_assert(e)
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#else
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#define lua_assert(c) ((void)0)
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#define check_exp(c, e) (e)
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#define api_check luai_apicheck
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#endif
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/* Static assertions. */
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#define LJ_ASSERT_NAME2(name, line) name ## line
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#define LJ_ASSERT_NAME(line) LJ_ASSERT_NAME2(lj_assert_, line)
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#ifdef __COUNTER__
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#define LJ_STATIC_ASSERT(cond) \
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extern void LJ_ASSERT_NAME(__COUNTER__)(int STATIC_ASSERTION_FAILED[(cond)?1:-1])
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#else
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#define LJ_STATIC_ASSERT(cond) \
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extern void LJ_ASSERT_NAME(__LINE__)(int STATIC_ASSERTION_FAILED[(cond)?1:-1])
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#endif
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#endif
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