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Diffstat (limited to 'Build/source/libs/luajit/LuaJIT-2.1.0-beta1/src/lj_jit.h')
| -rw-r--r-- | Build/source/libs/luajit/LuaJIT-2.1.0-beta1/src/lj_jit.h | 440 |
1 files changed, 440 insertions, 0 deletions
diff --git a/Build/source/libs/luajit/LuaJIT-2.1.0-beta1/src/lj_jit.h b/Build/source/libs/luajit/LuaJIT-2.1.0-beta1/src/lj_jit.h new file mode 100644 index 00000000000..1df56cae55e --- /dev/null +++ b/Build/source/libs/luajit/LuaJIT-2.1.0-beta1/src/lj_jit.h @@ -0,0 +1,440 @@ +/* +** Common definitions for the JIT compiler. +** Copyright (C) 2005-2015 Mike Pall. See Copyright Notice in luajit.h +*/ + +#ifndef _LJ_JIT_H +#define _LJ_JIT_H + +#include "lj_obj.h" +#include "lj_ir.h" + +/* JIT engine flags. */ +#define JIT_F_ON 0x00000001 + +/* CPU-specific JIT engine flags. */ +#if LJ_TARGET_X86ORX64 +#define JIT_F_SSE2 0x00000010 +#define JIT_F_SSE3 0x00000020 +#define JIT_F_SSE4_1 0x00000040 +#define JIT_F_PREFER_IMUL 0x00000080 +#define JIT_F_LEA_AGU 0x00000100 + +/* Names for the CPU-specific flags. Must match the order above. */ +#define JIT_F_CPU_FIRST JIT_F_SSE2 +#define JIT_F_CPUSTRING "\4SSE2\4SSE3\6SSE4.1\3AMD\4ATOM" +#elif LJ_TARGET_ARM +#define JIT_F_ARMV6_ 0x00000010 +#define JIT_F_ARMV6T2_ 0x00000020 +#define JIT_F_ARMV7 0x00000040 +#define JIT_F_VFPV2 0x00000080 +#define JIT_F_VFPV3 0x00000100 + +#define JIT_F_ARMV6 (JIT_F_ARMV6_|JIT_F_ARMV6T2_|JIT_F_ARMV7) +#define JIT_F_ARMV6T2 (JIT_F_ARMV6T2_|JIT_F_ARMV7) +#define JIT_F_VFP (JIT_F_VFPV2|JIT_F_VFPV3) + +/* Names for the CPU-specific flags. Must match the order above. */ +#define JIT_F_CPU_FIRST JIT_F_ARMV6_ +#define JIT_F_CPUSTRING "\5ARMv6\7ARMv6T2\5ARMv7\5VFPv2\5VFPv3" +#elif LJ_TARGET_PPC +#define JIT_F_SQRT 0x00000010 +#define JIT_F_ROUND 0x00000020 + +/* Names for the CPU-specific flags. Must match the order above. */ +#define JIT_F_CPU_FIRST JIT_F_SQRT +#define JIT_F_CPUSTRING "\4SQRT\5ROUND" +#elif LJ_TARGET_MIPS +#define JIT_F_MIPS32R2 0x00000010 + +/* Names for the CPU-specific flags. Must match the order above. */ +#define JIT_F_CPU_FIRST JIT_F_MIPS32R2 +#define JIT_F_CPUSTRING "\010MIPS32R2" +#else +#define JIT_F_CPU_FIRST 0 +#define JIT_F_CPUSTRING "" +#endif + +/* Optimization flags. */ +#define JIT_F_OPT_MASK 0x0fff0000 + +#define JIT_F_OPT_FOLD 0x00010000 +#define JIT_F_OPT_CSE 0x00020000 +#define JIT_F_OPT_DCE 0x00040000 +#define JIT_F_OPT_FWD 0x00080000 +#define JIT_F_OPT_DSE 0x00100000 +#define JIT_F_OPT_NARROW 0x00200000 +#define JIT_F_OPT_LOOP 0x00400000 +#define JIT_F_OPT_ABC 0x00800000 +#define JIT_F_OPT_SINK 0x01000000 +#define JIT_F_OPT_FUSE 0x02000000 + +/* Optimizations names for -O. Must match the order above. */ +#define JIT_F_OPT_FIRST JIT_F_OPT_FOLD +#define JIT_F_OPTSTRING \ + "\4fold\3cse\3dce\3fwd\3dse\6narrow\4loop\3abc\4sink\4fuse" + +/* Optimization levels set a fixed combination of flags. */ +#define JIT_F_OPT_0 0 +#define JIT_F_OPT_1 (JIT_F_OPT_FOLD|JIT_F_OPT_CSE|JIT_F_OPT_DCE) +#define JIT_F_OPT_2 (JIT_F_OPT_1|JIT_F_OPT_NARROW|JIT_F_OPT_LOOP) +#define JIT_F_OPT_3 (JIT_F_OPT_2|\ + JIT_F_OPT_FWD|JIT_F_OPT_DSE|JIT_F_OPT_ABC|JIT_F_OPT_SINK|JIT_F_OPT_FUSE) +#define JIT_F_OPT_DEFAULT JIT_F_OPT_3 + +#if LJ_TARGET_WINDOWS || LJ_64 +/* See: http://blogs.msdn.com/oldnewthing/archive/2003/10/08/55239.aspx */ +#define JIT_P_sizemcode_DEFAULT 64 +#else +/* Could go as low as 4K, but the mmap() overhead would be rather high. */ +#define JIT_P_sizemcode_DEFAULT 32 +#endif + +/* Optimization parameters and their defaults. Length is a char in octal! */ +#define JIT_PARAMDEF(_) \ + _(\010, maxtrace, 1000) /* Max. # of traces in cache. */ \ + _(\011, maxrecord, 4000) /* Max. # of recorded IR instructions. */ \ + _(\012, maxirconst, 500) /* Max. # of IR constants of a trace. */ \ + _(\007, maxside, 100) /* Max. # of side traces of a root trace. */ \ + _(\007, maxsnap, 500) /* Max. # of snapshots for a trace. */ \ + _(\011, minstitch, 0) /* Min. # of IR ins for a stitched trace. */ \ + \ + _(\007, hotloop, 56) /* # of iter. to detect a hot loop/call. */ \ + _(\007, hotexit, 10) /* # of taken exits to start a side trace. */ \ + _(\007, tryside, 4) /* # of attempts to compile a side trace. */ \ + \ + _(\012, instunroll, 4) /* Max. unroll for instable loops. */ \ + _(\012, loopunroll, 15) /* Max. unroll for loop ops in side traces. */ \ + _(\012, callunroll, 3) /* Max. unroll for recursive calls. */ \ + _(\011, recunroll, 2) /* Min. unroll for true recursion. */ \ + \ + /* Size of each machine code area (in KBytes). */ \ + _(\011, sizemcode, JIT_P_sizemcode_DEFAULT) \ + /* Max. total size of all machine code areas (in KBytes). */ \ + _(\010, maxmcode, 512) \ + /* End of list. */ + +enum { +#define JIT_PARAMENUM(len, name, value) JIT_P_##name, +JIT_PARAMDEF(JIT_PARAMENUM) +#undef JIT_PARAMENUM + JIT_P__MAX +}; + +#define JIT_PARAMSTR(len, name, value) #len #name +#define JIT_P_STRING JIT_PARAMDEF(JIT_PARAMSTR) + +/* Trace compiler state. */ +typedef enum { + LJ_TRACE_IDLE, /* Trace compiler idle. */ + LJ_TRACE_ACTIVE = 0x10, + LJ_TRACE_RECORD, /* Bytecode recording active. */ + LJ_TRACE_START, /* New trace started. */ + LJ_TRACE_END, /* End of trace. */ + LJ_TRACE_ASM, /* Assemble trace. */ + LJ_TRACE_ERR /* Trace aborted with error. */ +} TraceState; + +/* Post-processing action. */ +typedef enum { + LJ_POST_NONE, /* No action. */ + LJ_POST_FIXCOMP, /* Fixup comparison and emit pending guard. */ + LJ_POST_FIXGUARD, /* Fixup and emit pending guard. */ + LJ_POST_FIXGUARDSNAP, /* Fixup and emit pending guard and snapshot. */ + LJ_POST_FIXBOOL, /* Fixup boolean result. */ + LJ_POST_FIXCONST, /* Fixup constant results. */ + LJ_POST_FFRETRY /* Suppress recording of retried fast functions. */ +} PostProc; + +/* Machine code type. */ +#if LJ_TARGET_X86ORX64 +typedef uint8_t MCode; +#else +typedef uint32_t MCode; +#endif + +/* Stack snapshot header. */ +typedef struct SnapShot { + uint16_t mapofs; /* Offset into snapshot map. */ + IRRef1 ref; /* First IR ref for this snapshot. */ + uint8_t nslots; /* Number of valid slots. */ + uint8_t topslot; /* Maximum frame extent. */ + uint8_t nent; /* Number of compressed entries. */ + uint8_t count; /* Count of taken exits for this snapshot. */ +} SnapShot; + +#define SNAPCOUNT_DONE 255 /* Already compiled and linked a side trace. */ + +/* Compressed snapshot entry. */ +typedef uint32_t SnapEntry; + +#define SNAP_FRAME 0x010000 /* Frame slot. */ +#define SNAP_CONT 0x020000 /* Continuation slot. */ +#define SNAP_NORESTORE 0x040000 /* No need to restore slot. */ +#define SNAP_SOFTFPNUM 0x080000 /* Soft-float number. */ +LJ_STATIC_ASSERT(SNAP_FRAME == TREF_FRAME); +LJ_STATIC_ASSERT(SNAP_CONT == TREF_CONT); + +#define SNAP(slot, flags, ref) (((SnapEntry)(slot) << 24) + (flags) + (ref)) +#define SNAP_TR(slot, tr) \ + (((SnapEntry)(slot) << 24) + ((tr) & (TREF_CONT|TREF_FRAME|TREF_REFMASK))) +#define SNAP_MKPC(pc) ((SnapEntry)u32ptr(pc)) +#define SNAP_MKFTSZ(ftsz) ((SnapEntry)(ftsz)) +#define snap_ref(sn) ((sn) & 0xffff) +#define snap_slot(sn) ((BCReg)((sn) >> 24)) +#define snap_isframe(sn) ((sn) & SNAP_FRAME) +#define snap_pc(sn) ((const BCIns *)(uintptr_t)(sn)) +#define snap_setref(sn, ref) (((sn) & (0xffff0000&~SNAP_NORESTORE)) | (ref)) + +/* Snapshot and exit numbers. */ +typedef uint32_t SnapNo; +typedef uint32_t ExitNo; + +/* Trace number. */ +typedef uint32_t TraceNo; /* Used to pass around trace numbers. */ +typedef uint16_t TraceNo1; /* Stored trace number. */ + +/* Type of link. ORDER LJ_TRLINK */ +typedef enum { + LJ_TRLINK_NONE, /* Incomplete trace. No link, yet. */ + LJ_TRLINK_ROOT, /* Link to other root trace. */ + LJ_TRLINK_LOOP, /* Loop to same trace. */ + LJ_TRLINK_TAILREC, /* Tail-recursion. */ + LJ_TRLINK_UPREC, /* Up-recursion. */ + LJ_TRLINK_DOWNREC, /* Down-recursion. */ + LJ_TRLINK_INTERP, /* Fallback to interpreter. */ + LJ_TRLINK_RETURN, /* Return to interpreter. */ + LJ_TRLINK_STITCH /* Trace stitching. */ +} TraceLink; + +/* Trace object. */ +typedef struct GCtrace { + GCHeader; + uint8_t topslot; /* Top stack slot already checked to be allocated. */ + uint8_t linktype; /* Type of link. */ + IRRef nins; /* Next IR instruction. Biased with REF_BIAS. */ +#if LJ_GC64 + uint32_t unused_gc64; +#endif + GCRef gclist; + IRIns *ir; /* IR instructions/constants. Biased with REF_BIAS. */ + IRRef nk; /* Lowest IR constant. Biased with REF_BIAS. */ + uint16_t nsnap; /* Number of snapshots. */ + uint16_t nsnapmap; /* Number of snapshot map elements. */ + SnapShot *snap; /* Snapshot array. */ + SnapEntry *snapmap; /* Snapshot map. */ + GCRef startpt; /* Starting prototype. */ + MRef startpc; /* Bytecode PC of starting instruction. */ + BCIns startins; /* Original bytecode of starting instruction. */ + MSize szmcode; /* Size of machine code. */ + MCode *mcode; /* Start of machine code. */ + MSize mcloop; /* Offset of loop start in machine code. */ + uint16_t nchild; /* Number of child traces (root trace only). */ + uint16_t spadjust; /* Stack pointer adjustment (offset in bytes). */ + TraceNo1 traceno; /* Trace number. */ + TraceNo1 link; /* Linked trace (or self for loops). */ + TraceNo1 root; /* Root trace of side trace (or 0 for root traces). */ + TraceNo1 nextroot; /* Next root trace for same prototype. */ + TraceNo1 nextside; /* Next side trace of same root trace. */ + uint8_t sinktags; /* Trace has SINK tags. */ + uint8_t unused1; +#ifdef LUAJIT_USE_GDBJIT + void *gdbjit_entry; /* GDB JIT entry. */ +#endif +} GCtrace; + +#define gco2trace(o) check_exp((o)->gch.gct == ~LJ_TTRACE, (GCtrace *)(o)) +#define traceref(J, n) \ + check_exp((n)>0 && (MSize)(n)<J->sizetrace, (GCtrace *)gcref(J->trace[(n)])) + +LJ_STATIC_ASSERT(offsetof(GChead, gclist) == offsetof(GCtrace, gclist)); + +static LJ_AINLINE MSize snap_nextofs(GCtrace *T, SnapShot *snap) +{ + if (snap+1 == &T->snap[T->nsnap]) + return T->nsnapmap; + else + return (snap+1)->mapofs; +} + +/* Round-robin penalty cache for bytecodes leading to aborted traces. */ +typedef struct HotPenalty { + MRef pc; /* Starting bytecode PC. */ + uint16_t val; /* Penalty value, i.e. hotcount start. */ + uint16_t reason; /* Abort reason (really TraceErr). */ +} HotPenalty; + +#define PENALTY_SLOTS 64 /* Penalty cache slot. Must be a power of 2. */ +#define PENALTY_MIN (36*2) /* Minimum penalty value. */ +#define PENALTY_MAX 60000 /* Maximum penalty value. */ +#define PENALTY_RNDBITS 4 /* # of random bits to add to penalty value. */ + +/* Round-robin backpropagation cache for narrowing conversions. */ +typedef struct BPropEntry { + IRRef1 key; /* Key: original reference. */ + IRRef1 val; /* Value: reference after conversion. */ + IRRef mode; /* Mode for this entry (currently IRCONV_*). */ +} BPropEntry; + +/* Number of slots for the backpropagation cache. Must be a power of 2. */ +#define BPROP_SLOTS 16 + +/* Scalar evolution analysis cache. */ +typedef struct ScEvEntry { + MRef pc; /* Bytecode PC of FORI. */ + IRRef1 idx; /* Index reference. */ + IRRef1 start; /* Constant start reference. */ + IRRef1 stop; /* Constant stop reference. */ + IRRef1 step; /* Constant step reference. */ + IRType1 t; /* Scalar type. */ + uint8_t dir; /* Direction. 1: +, 0: -. */ +} ScEvEntry; + +/* Reverse bytecode map (IRRef -> PC). Only for selected instructions. */ +typedef struct RBCHashEntry { + MRef pc; /* Bytecode PC. */ + GCRef pt; /* Prototype. */ + IRRef ref; /* IR reference. */ +} RBCHashEntry; + +/* Number of slots in the reverse bytecode hash table. Must be a power of 2. */ +#define RBCHASH_SLOTS 8 + +/* 128 bit SIMD constants. */ +enum { + LJ_KSIMD_ABS, + LJ_KSIMD_NEG, + LJ_KSIMD__MAX +}; + +/* Get 16 byte aligned pointer to SIMD constant. */ +#define LJ_KSIMD(J, n) \ + ((TValue *)(((intptr_t)&J->ksimd[2*(n)] + 15) & ~(intptr_t)15)) + +/* Set/reset flag to activate the SPLIT pass for the current trace. */ +#if LJ_SOFTFP || (LJ_32 && LJ_HASFFI) +#define lj_needsplit(J) (J->needsplit = 1) +#define lj_resetsplit(J) (J->needsplit = 0) +#else +#define lj_needsplit(J) UNUSED(J) +#define lj_resetsplit(J) UNUSED(J) +#endif + +/* Fold state is used to fold instructions on-the-fly. */ +typedef struct FoldState { + IRIns ins; /* Currently emitted instruction. */ + IRIns left; /* Instruction referenced by left operand. */ + IRIns right; /* Instruction referenced by right operand. */ +} FoldState; + +/* JIT compiler state. */ +typedef struct jit_State { + GCtrace cur; /* Current trace. */ + + lua_State *L; /* Current Lua state. */ + const BCIns *pc; /* Current PC. */ + GCfunc *fn; /* Current function. */ + GCproto *pt; /* Current prototype. */ + TRef *base; /* Current frame base, points into J->slots. */ + + uint32_t flags; /* JIT engine flags. */ + BCReg maxslot; /* Relative to baseslot. */ + BCReg baseslot; /* Current frame base, offset into J->slots. */ + + uint8_t mergesnap; /* Allowed to merge with next snapshot. */ + uint8_t needsnap; /* Need snapshot before recording next bytecode. */ + IRType1 guardemit; /* Accumulated IRT_GUARD for emitted instructions. */ + uint8_t bcskip; /* Number of bytecode instructions to skip. */ + + FoldState fold; /* Fold state. */ + + const BCIns *bc_min; /* Start of allowed bytecode range for root trace. */ + MSize bc_extent; /* Extent of the range. */ + + TraceState state; /* Trace compiler state. */ + + int32_t instunroll; /* Unroll counter for instable loops. */ + int32_t loopunroll; /* Unroll counter for loop ops in side traces. */ + int32_t tailcalled; /* Number of successive tailcalls. */ + int32_t framedepth; /* Current frame depth. */ + int32_t retdepth; /* Return frame depth (count of RETF). */ + + MRef k64; /* Pointer to chained array of 64 bit constants. */ + TValue ksimd[LJ_KSIMD__MAX*2+1]; /* 16 byte aligned SIMD constants. */ + + IRIns *irbuf; /* Temp. IR instruction buffer. Biased with REF_BIAS. */ + IRRef irtoplim; /* Upper limit of instuction buffer (biased). */ + IRRef irbotlim; /* Lower limit of instuction buffer (biased). */ + IRRef loopref; /* Last loop reference or ref of final LOOP (or 0). */ + + MSize sizesnap; /* Size of temp. snapshot buffer. */ + SnapShot *snapbuf; /* Temp. snapshot buffer. */ + SnapEntry *snapmapbuf; /* Temp. snapshot map buffer. */ + MSize sizesnapmap; /* Size of temp. snapshot map buffer. */ + + PostProc postproc; /* Required post-processing after execution. */ +#if LJ_SOFTFP || (LJ_32 && LJ_HASFFI) + uint8_t needsplit; /* Need SPLIT pass. */ +#endif + uint8_t retryrec; /* Retry recording. */ + + GCRef *trace; /* Array of traces. */ + TraceNo freetrace; /* Start of scan for next free trace. */ + MSize sizetrace; /* Size of trace array. */ + + IRRef1 chain[IR__MAX]; /* IR instruction skip-list chain anchors. */ + TRef slot[LJ_MAX_JSLOTS+LJ_STACK_EXTRA]; /* Stack slot map. */ + + int32_t param[JIT_P__MAX]; /* JIT engine parameters. */ + + MCode *exitstubgroup[LJ_MAX_EXITSTUBGR]; /* Exit stub group addresses. */ + + HotPenalty penalty[PENALTY_SLOTS]; /* Penalty slots. */ + uint32_t penaltyslot; /* Round-robin index into penalty slots. */ + uint32_t prngstate; /* PRNG state. */ + +#ifdef LUAJIT_ENABLE_TABLE_BUMP + RBCHashEntry rbchash[RBCHASH_SLOTS]; /* Reverse bytecode map. */ +#endif + + BPropEntry bpropcache[BPROP_SLOTS]; /* Backpropagation cache slots. */ + uint32_t bpropslot; /* Round-robin index into bpropcache slots. */ + + ScEvEntry scev; /* Scalar evolution analysis cache slots. */ + + const BCIns *startpc; /* Bytecode PC of starting instruction. */ + TraceNo parent; /* Parent of current side trace (0 for root traces). */ + ExitNo exitno; /* Exit number in parent of current side trace. */ + + BCIns *patchpc; /* PC for pending re-patch. */ + BCIns patchins; /* Instruction for pending re-patch. */ + + int mcprot; /* Protection of current mcode area. */ + MCode *mcarea; /* Base of current mcode area. */ + MCode *mctop; /* Top of current mcode area. */ + MCode *mcbot; /* Bottom of current mcode area. */ + size_t szmcarea; /* Size of current mcode area. */ + size_t szallmcarea; /* Total size of all allocated mcode areas. */ + + TValue errinfo; /* Additional info element for trace errors. */ + +#if LJ_HASPROFILE + GCproto *prev_pt; /* Previous prototype. */ + BCLine prev_line; /* Previous line. */ + int prof_mode; /* Profiling mode: 0, 'f', 'l'. */ +#endif +} +#if LJ_TARGET_ARM +LJ_ALIGN(16) /* For DISPATCH-relative addresses in assembler part. */ +#endif +jit_State; + +/* Trivial PRNG e.g. used for penalty randomization. */ +static LJ_AINLINE uint32_t LJ_PRNG_BITS(jit_State *J, int bits) +{ + /* Yes, this LCG is very weak, but that doesn't matter for our use case. */ + J->prngstate = J->prngstate * 1103515245 + 12345; + return J->prngstate >> (32-bits); +} + +#endif |