-This is a list of changes between the released versions of LuaJIT.
-The current stable version is LuaJIT 2.0.5.
-
-Please check the -» Online Change History -to see whether newer versions are available. -
- -
-
-
-LuaJIT 2.1.0-beta3 — 2017-05-01
--
-
- Rewrite memory block allocator. -
- Add various extension from Lua 5.2/5.3. -
- Remove old Lua 5.0 compatibility defines. -
- Set arg table before evaluating LUA_INIT and -e chunks. -
- Fix FOLD rules for math.abs() and FP negation. -
- Fix soft-float math.abs() and negation. -
- Fix formatting of some small denormals at low precision. -
- LJ_GC64: Add JIT compiler support. -
- x64/LJ_GC64: Add JIT compiler backend. -
- x86/x64: Generate BMI2 shifts and rotates, if available. -
- Windows/x86: Add full exception interoperability. -
- ARM64: Add big-endian support. -
- ARM64: Add JIT compiler backend. -
- MIPS: Fix TSETR barrier. -
- MIPS: Support MIPS16 interlinking. -
- MIPS soft-float: Fix code generation for HREF. -
- MIPS64: Add MIPS64 hard-float JIT compiler backend. -
- MIPS64: Add MIPS64 hard-float/soft-float support to interpreter. -
- FFI: Compile bitfield loads/stores. -
- Various fixes common with the 2.0 branch. -
LuaJIT 2.1.0-beta2 — 2016-03-03
--
-
- Enable trace stitching. -
- Use internal implementation for converting FP numbers to strings. -
- Parse Unicode escape '\u{XX...}' in string literals. -
- Add MIPS soft-float support. -
- Switch MIPS port to dual-number mode. -
- x86/x64: Add support for AES-NI, AVX and AVX2 to DynASM. -
- FFI: Add ssize_t declaration. -
- FFI: Parse #line NN and #NN. -
- Various minor fixes. -
LuaJIT 2.1.0-beta1 — 2015-08-25
--This is a brief summary of the major changes in LuaJIT 2.1 compared to 2.0. -Please take a look at the commit history for more details. -
--
-
- Changes to the VM core:
-
-
-
- Add low-overhead profiler (-jp). -
- Add LJ_GC64 mode: 64 bit GC object references (really: 47 bit). Interpreter-only for now. -
- Add LJ_FR2 mode: Two-slot frame info. Required by LJ_GC64 mode. -
- Add table.new() and table.clear(). -
- Parse binary number literals (0bxxx). -
- - Improvements to the JIT compiler:
-
-
-
- Add trace stitching (disabled for now). -
- Compile various builtins: string.char(), string.reverse(), string.lower(), string.upper(), string.rep(), string.format(), table.concat(), bit.tohex(), getfenv(0), debug.getmetatable(). -
- Compile string.find() for fixed string searches (no patterns). -
- Compile BC_TSETM, e.g. {1,2,3,f()}. -
- Compile string concatenations (BC_CAT). -
- Compile __concat metamethod. -
- Various minor optimizations. -
- - Internal Changes:
-
-
-
- Add support for embedding LuaJIT bytecode for builtins. -
- Replace various builtins with embedded bytecode. -
- Refactor string buffers and string formatting. -
- Remove obsolete non-truncating number to integer conversions. -
- - Ports:
-
-
-
- Add Xbox One port (LJ_GC64 mode). -
- ARM64: Add port of the interpreter (LJ_GC64 mode). -
- x64: Add separate port of the interpreter to LJ_GC64 mode. -
- x86/x64: Drop internal x87 math functions. Use libm functions. -
- x86: Remove x87 support from interpreter. SSE2 is mandatory now. -
- PPC/e500: Drop support for this architecture. -
- - FFI library:
-
-
-
- FFI: Add 64 bit bitwise operations. -
- FFI: Compile VLA/VLS and large cdata allocations with default initialization. -
- FFI: Compile conversions from functions to function pointers. -
- FFI: Compile lightuserdata to void * conversion. -
- FFI: Compile ffi.gc(cdata, nil), too. -
- FFI: Add ffi.typeinfo(). -
-
-
-LuaJIT 2.0.5 — 2017-05-01
--
-
- Add workaround for MSVC 2015 stdio changes. -
- Limit mcode alloc probing, depending on the available pool size. -
- Fix overly restrictive range calculation in mcode allocation. -
- Fix out-of-scope goto handling in parser. -
- Remove internal __mode = "K" and replace with safe check. -
- Add "proto" field to jit.util.funcinfo(). -
- Fix GC step size calculation. -
- Initialize uv->immutable for upvalues of loaded chunks. -
- Fix for cdata vs. non-cdata arithmetics/comparisons. -
- Drop leftover regs in 'for' iterator assignment, too. -
- Fix PHI remarking in SINK pass. -
- Don't try to record outermost pcall() return to lower frame. -
- Add guard for obscure aliasing between open upvalues and SSA slots. -
- Remove assumption that lj_math_random_step() doesn't clobber FPRs. -
- Fix handling of non-numeric strings in arithmetic coercions. -
- Fix recording of select(n, ...) with off-trace varargs -
- Fix install for cross-builds. -
- Don't allocate unused 2nd result register in JIT compiler backend. -
- Drop marks from replayed instructions when sinking. -
- Fix unsinking check. -
- Properly handle OOM in trace_save(). -
- Limit number of arguments given to io.lines() and fp:lines(). -
- Fix narrowing of TOBIT. -
- OSX: Fix build with recent XCode. -
- x86/x64: Don't spill an explicit REF_BASE in the IR. -
- x86/x64: Fix instruction length decoder. -
- x86/x64: Search for exit jumps with instruction length decoder. -
- ARM: Fix BLX encoding for Thumb interworking calls. -
- MIPS: Don't use RID_GP as a scratch register. -
- MIPS: Fix emitted code for U32 to float conversion. -
- MIPS: Backport workaround for compact unwind tables. -
- MIPS: Fix cross-endian jit.bcsave. -
- MIPS: Fix BC_ISNEXT fallback path. -
- MIPS: Fix use of ffgccheck delay slots in interpreter. -
- FFI: Fix FOLD rules for int64_t comparisons. -
- FFI: Fix SPLIT pass for CONV i64.u64. -
- FFI: Fix ipairs() recording. -
- FFI: Don't propagate qualifiers into subtypes of complex. -
LuaJIT 2.0.4 — 2015-05-14
--
-
- Fix stack check in narrowing optimization. -
- Fix Lua/C API typecheck error for special indexes. -
- Fix string to number conversion. -
- Fix lexer error for chunks without tokens. -
- Don't compile IR_RETF after CALLT to ff with-side effects. -
- Fix BC_UCLO/BC_JMP join optimization in Lua parser. -
- Fix corner case in string to number conversion. -
- Gracefully handle lua_error() for a suspended coroutine. -
- Avoid error messages when building with Clang. -
- Fix snapshot #0 handling for traces with a stack check on entry. -
- Fix fused constant loads under high register pressure. -
- Invalidate backpropagation cache after DCE. -
- Fix ABC elimination. -
- Fix debug info for main chunk of stripped bytecode. -
- Fix FOLD rule for string.sub(s, ...) == k. -
- Fix FOLD rule for STRREF of SNEW. -
- Fix frame traversal while searching for error function. -
- Prevent GC estimate miscalculation due to buffer growth. -
- Prevent adding side traces for stack checks. -
- Fix top slot calculation for snapshots with continuations. -
- Fix check for reuse of SCEV results in FORL. -
- Add PS Vita port. -
- Fix compatibility issues with Illumos. -
- Fix DragonFly build (unsupported). -
- OpenBSD/x86: Better executable memory allocation for W^X mode. -
- x86: Fix argument checks for ipairs() iterator. -
- x86: lj_math_random_step() clobbers XMM regs on OSX Clang. -
- x86: Fix code generation for unused result of math.random(). -
- x64: Allow building with LUAJIT_USE_SYSMALLOC and LUAJIT_USE_VALGRIND. -
- x86/x64: Fix argument check for bit shifts. -
- x86/x64: Fix code generation for fused test/arith ops. -
- ARM: Fix write barrier check in BC_USETS. -
- PPC: Fix red zone overflow in machine code generation. -
- PPC: Don't use mcrxr on PPE. -
- Various archs: Fix excess stack growth in interpreter. -
- FFI: Fix FOLD rule for TOBIT + CONV num.u32. -
- FFI: Prevent DSE across ffi.string(). -
- FFI: No meta fallback when indexing pointer to incomplete struct. -
- FFI: Fix initialization of unions of subtypes. -
- FFI: Fix cdata vs. non-cdata arithmetic and comparisons. -
- FFI: Fix __index/__newindex metamethod resolution for ctypes. -
- FFI: Fix compilation of reference field access. -
- FFI: Fix frame traversal for backtraces with FFI callbacks. -
- FFI: Fix recording of indexing a struct pointer ctype object itself. -
- FFI: Allow non-scalar cdata to be compared for equality by address. -
- FFI: Fix pseudo type conversions for type punning. -
LuaJIT 2.0.3 — 2014-03-12
--
-
- Add PS4 port. -
- Add support for multilib distro builds. -
- Fix OSX build. -
- Fix MinGW build. -
- Fix Xbox 360 build. -
- Improve ULOAD forwarding for open upvalues. -
- Fix GC steps threshold handling when called by JIT-compiled code. -
- Fix argument checks for math.deg() and math.rad(). -
- Fix jit.flush(func|true). -
- Respect jit.off(func) when returning to a function, too. -
- Fix compilation of string.byte(s, nil, n). -
- Fix line number for relocated bytecode after closure fixup -
- Fix frame traversal for backtraces. -
- Fix ABC elimination. -
- Fix handling of redundant PHIs. -
- Fix snapshot restore for exit to function header. -
- Fix type punning alias analysis for constified pointers -
- Fix call unroll checks in the presence of metamethod frames. -
- Fix initial maxslot for down-recursive traces. -
- Prevent BASE register coalescing if parent uses IR_RETF. -
- Don't purge modified function from stack slots in BC_RET. -
- Fix recording of BC_VARG. -
- Don't access dangling reference to reallocated IR. -
- Fix frame depth display for bytecode dump in -jdump. -
- ARM: Fix register allocation when rematerializing FPRs. -
- x64: Fix store to upvalue for lightuserdata values. -
- FFI: Add missing GC steps for callback argument conversions. -
- FFI: Properly unload loaded DLLs. -
- FFI: Fix argument checks for ffi.string(). -
- FFI/x64: Fix passing of vector arguments to calls. -
- FFI: Rehash finalizer table after GC cycle, if needed. -
- FFI: Fix cts->L for cdata unsinking in snapshot restore. -
LuaJIT 2.0.2 — 2013-06-03
--
-
- Fix memory access check for fast string interning. -
- Fix MSVC intrinsics for older versions. -
- Add missing GC steps for io.* functions. -
- Fix spurious red zone overflows in machine code generation. -
- Fix jump-range constrained mcode allocation. -
- Inhibit DSE for implicit loads via calls. -
- Fix builtin string to number conversion for overflow digits. -
- Fix optional argument handling while recording builtins. -
- Fix optional argument handling in table.concat(). -
- Add partial support for building with MingW64 GCC 4.8-SEH. -
- Add missing PHI barrier to string.sub(str, a, b) == kstr FOLD rule. -
- Fix compatibility issues with Illumos. -
- ARM: Fix cache flush/sync for exit stubs of JIT-compiled code. -
- MIPS: Fix cache flush/sync for JIT-compiled code jump area. -
- PPC: Add plt suffix for external calls from assembler code. -
- FFI: Fix snapshot substitution in SPLIT pass. -
- FFI/x86: Fix register allocation for 64 bit comparisons. -
- FFI: Fix tailcall in lowest frame to C function with bool result. -
- FFI: Ignore long type specifier in ffi.istype(). -
- FFI: Fix calling conventions for 32 bit OSX and iOS simulator (struct returns). -
- FFI: Fix calling conventions for ARM hard-float EABI (nested structs). -
- FFI: Improve error messages for arithmetic and comparison operators. -
- FFI: Insert no-op type conversion for pointer to integer cast. -
- FFI: Fix unroll limit for ffi.fill(). -
- FFI: Must sink XBAR together with XSTOREs. -
- FFI: Preserve intermediate string for const char * conversion. -
LuaJIT 2.0.1 — 2013-02-19
--
-
- Don't clear frame for out-of-memory error. -
- Leave hook when resume catches error thrown from hook. -
- Add missing GC steps for template table creation. -
- Fix discharge order of comparisons in Lua parser. -
- Improve buffer handling for io.read(). -
- OSX: Add support for Mach-O object files to -b option. -
- Fix PS3 port. -
- Fix/enable Xbox 360 port. -
- x86/x64: Always mark ref for shift count as non-weak. -
- x64: Don't fuse implicitly 32-to-64 extended operands. -
- ARM: Fix armhf call argument handling. -
- ARM: Fix code generation for integer math.min/math.max. -
- PPC/e500: Fix lj_vm_floor() for Inf/NaN. -
- FFI: Change priority of table initializer variants for structs. -
- FFI: Fix code generation for bool call result check on x86/x64. -
- FFI: Load FFI library on-demand for bytecode with cdata literals. -
- FFI: Fix handling of qualified transparent structs/unions. -
LuaJIT 2.0.0 — 2012-11-08
--
-
- Correctness and completeness:
-
-
-
- Fix Android/x86 build. -
- Fix recording of equality comparisons with __eq metamethods. -
- Fix detection of immutable upvalues. -
- Replace error with PANIC for callbacks from JIT-compiled code. -
- Fix builtin string to number conversion for INT_MIN. -
- Don't create unneeded array part for template tables. -
- Fix CONV.num.int sinking. -
- Don't propagate implicitly widened number to index metamethods. -
- ARM: Fix ordered comparisons of number vs. non-number. -
- FFI: Fix code generation for replay of sunk float fields. -
- FFI: Fix signedness of bool. -
- FFI: Fix recording of bool call result check on x86/x64. -
- FFI: Fix stack-adjustment for __thiscall callbacks. -
-
LuaJIT 2.0.0-beta11 — 2012-10-16
--
-
- New features:
-
-
-
- Use ARM VFP instructions, if available (build-time detection). -
- Add support for ARM hard-float EABI (armhf). -
- Add PS3 port. -
- Add many features from Lua 5.2, e.g. goto/labels. - Refer to this list. -
- FFI: Add parameterized C types. -
- FFI: Add support for copy constructors. -
- FFI: Equality comparisons never raise an error (treat as unequal instead). -
- FFI: Box all accessed or returned enums. -
- FFI: Check for __new metamethod when calling a constructor. -
- FFI: Handle __pairs/__ipairs metamethods for cdata objects. -
- FFI: Convert io.* file handle to FILE * pointer (but as a void *). -
- FFI: Detect and support type punning through unions. -
- FFI: Improve various error messages. -
- - Build-system reorganization:
-
-
-
- Reorganize directory layout:
- lib/* → src/jit/*
- src/buildvm_*.dasc → src/vm_*.dasc
- src/buildvm_*.h → removed
- src/buildvm* → src/host/*
- - Add minified Lua interpreter plus Lua BitOp (minilua) to run DynASM. -
- Change DynASM bit operations to use Lua BitOp -
- Translate only vm_*.dasc for detected target architecture. -
- Improve target detection for msvcbuild.bat. -
- Fix build issues on Cygwin and MinGW with optional MSys. -
- Handle cross-compiles with FPU/no-FPU or hard-fp/soft-fp ABI mismatch. -
- Remove some library functions for no-JIT/no-FFI builds. -
- Add uninstall target to top-level Makefile. -
- - Reorganize directory layout:
- Correctness and completeness:
-
-
-
- Preserve snapshot #0 PC for all traces. -
- Fix argument checks for coroutine.create(). -
- Command line prints version and JIT status to stdout, not stderr. -
- Fix userdata __gc separations at Lua state close. -
- Fix TDUP to HLOAD forwarding for LJ_DUALNUM builds. -
- Fix buffer check in bytecode writer. -
- Make os.date() thread-safe. -
- Add missing declarations for MSVC intrinsics. -
- Fix dispatch table modifications for return hooks. -
- Workaround for MSVC conversion bug (double → uint32_t → int32_t). -
- Fix FOLD rule (i-j)-i => 0-j. -
- Never use DWARF unwinder on Windows. -
- Fix shrinking of direct mapped blocks in builtin allocator. -
- Limit recursion depth in string.match() et al. -
- Fix late despecialization of ITERN after loop has been entered. -
- Fix 'f' and 'L' options for debug.getinfo() and lua_getinfo(). -
- Fix package.searchpath(). -
- OSX: Change dylib names to be consistent with other platforms. -
- Android: Workaround for broken sprintf("%g", -0.0). -
- x86: Remove support for ancient CPUs without CMOV (before Pentium Pro). -
- x86: Fix register allocation for calls returning register pair. -
- x86/x64: Fix fusion of unsigned byte comparisons with swapped operands. -
- ARM: Fix tonumber() argument check. -
- ARM: Fix modulo operator and math.floor()/math.ceil() for inf/nan. -
- ARM: Invoke SPLIT pass for leftover IR_TOBIT. -
- ARM: Fix BASE register coalescing. -
- PPC: Fix interpreter state setup in callbacks. -
- PPC: Fix string.sub() range check. -
- MIPS: Support generation of MIPS/MIPSEL bytecode object files. -
- MIPS: Fix calls to floor()/ceil()/trunc(). -
- ARM/PPC: Detect more target architecture variants. -
- ARM/PPC/e500/MIPS: Fix tailcalls from fast functions, esp. tostring(). -
- ARM/PPC/MIPS: Fix rematerialization of FP constants. -
- FFI: Don't call FreeLibrary() on our own EXE/DLL. -
- FFI: Resolve metamethods for constructors, too. -
- FFI: Properly disable callbacks on iOS (would require executable memory). -
- FFI: Fix cdecl string parsing during recording. -
- FFI: Show address pointed to for tostring(ref), too. -
- FFI: Fix alignment of C call argument/return structure. -
- FFI: Initialize all fields of standard types. -
- FFI: Fix callback handling when new C types are declared in callback. -
- FFI: Fix recording of constructors for pointers. -
- FFI: Always resolve metamethods for pointers to structs. -
- FFI: Correctly propagate alignment when interning nested types. -
- - Structural and performance enhancements:
-
-
-
- Add allocation sinking and store sinking optimization. -
- Constify immutable upvalues. -
- Add builtin string to integer or FP number conversion. Improves cross-platform consistency and correctness. -
- Create string hash slots in template tables for non-const values, too. Avoids later table resizes. -
- Eliminate HREFK guard for template table references. -
- Add various new FOLD rules. -
- Don't use stack unwinding for lua_yield() (slow on x64). -
- ARM, PPC, MIPS: Improve XLOAD operand fusion and register hinting. -
- PPC, MIPS: Compile math.sqrt() to sqrt instruction, if available. -
- FFI: Fold KPTR + constant offset in SPLIT pass. -
- FFI: Optimize/inline ffi.copy() and ffi.fill(). -
- FFI: Compile and optimize array/struct copies. -
- FFI: Compile ffi.typeof(cdata|ctype), ffi.sizeof(), ffi.alignof(), ffi.offsetof() and ffi.gc(). -
-
LuaJIT 2.0.0-beta10 — 2012-05-09
--
-
- New features:
-
-
-
- The MIPS of LuaJIT is complete. It requires a CPU conforming to the -MIPS32 R1 architecture with hardware FPU. O32 hard-fp ABI, -little-endian or big-endian. -
- Auto-detect target arch via cross-compiler. No need for -TARGET=arch anymore. -
- Make DynASM compatible with Lua 5.2. -
- From Lua 5.2: Try __tostring metamethod on non-string error -messages.. -
- - Correctness and completeness:
-
-
-
- Fix parsing of hex literals with exponents. -
- Fix bytecode dump for certain number constants. -
- Fix argument type in error message for relative arguments. -
- Fix argument error handling on Lua stacks without a frame. -
- Add missing mcode limit check in assembler backend. -
- Fix compilation on OpenBSD. -
- Avoid recursive GC steps after GC-triggered trace exit. -
- Replace <unwind.h> definitions with our own. -
- Fix OSX build issues. Bump minimum required OSX version to 10.4. -
- Fix discharge order of comparisons in Lua parser. -
- Ensure running __gc of userdata created in __gc -at state close. -
- Limit number of userdata __gc separations at state close. -
- Fix bytecode JMP slot range when optimizing -and/or with constant LHS. -
- Fix DSE of USTORE. -
- Make lua_concat() work from C hook with partial frame. -
- Add required PHIs for implicit conversions, e.g. via XREF -forwarding. -
- Add more comparison variants to Valgrind suppressions file. -
- Disable loading bytecode with an extra header (BOM or #!). -
- Fix PHI stack slot syncing. -
- ARM: Reorder type/value tests to silence Valgrind. -
- ARM: Fix register allocation for ldrd-optimized -HREFK. -
- ARM: Fix conditional branch fixup for OBAR. -
- ARM: Invoke SPLIT pass for double args in FFI call. -
- ARM: Handle all CALL* ops with double results in -SPLIT pass. -
- ARM: Fix rejoin of POW in SPLIT pass. -
- ARM: Fix compilation of math.sinh, math.cosh, -math.tanh. -
- ARM, PPC: Avoid pointless arg clearing in BC_IFUNCF. -
- PPC: Fix resume after yield from hook. -
- PPC: Fix argument checking for rawget(). -
- PPC: Fix fusion of floating-point XLOAD/XSTORE. -
- PPC: Fix HREFK code generation for huge tables. -
- PPC: Use builtin D-Cache/I-Cache sync code. -
- - FFI library:
-
-
-
- Ignore empty statements in ffi.cdef(). -
- Ignore number parsing errors while skipping definitions. -
- Don't touch frame in callbacks with tailcalls to fast functions. -
- Fix library unloading on POSIX systems. -
- Finalize cdata before userdata when closing the state. -
- Change ffi.load() library name resolution for Cygwin. -
- Fix resolving of function name redirects on Windows/x86. -
- Fix symbol resolving error messages on Windows. -
- Fix blacklisting of C functions calling callbacks. -
- Fix result type of pointer difference. -
- Use correct PC in FFI metamethod error message. -
- Allow 'typedef _Bool int BOOL;' for the Windows API. -
- Don't record test for bool result of call, if ignored. -
-
LuaJIT 2.0.0-beta9 — 2011-12-14
--
-
- New features:
-
-
-
- PPC port of LuaJIT is complete. Default is the dual-number port -(usually faster). Single-number port selectable via src/Makefile -at build time. -
- Add FFI callback support. -
- Extend -b to generate .c, .h or .obj/.o -files with embedded bytecode. -
- Allow loading embedded bytecode with require(). -
- From Lua 5.2: Change to '\z' escape. Reject undefined escape -sequences. -
- - Correctness and completeness:
-
-
-
- Fix OSX 10.7 build. Fix install_name and versioning on OSX. -
- Fix iOS build. -
- Install dis_arm.lua, too. -
- Mark installed shared library as executable. -
- Add debug option to msvcbuild.bat and improve error handling. -
- Fix data-flow analysis for iterators. -
- Fix forced unwinding triggered by external unwinder. -
- Record missing for loop slot loads (return to lower frame). -
- Always use ANSI variants of Windows system functions. -
- Fix GC barrier for multi-result table constructor (TSETM). -
- Fix/add various FOLD rules. -
- Add potential PHI for number conversions due to type instability. -
- Do not eliminate PHIs only referenced from other PHIs. -
- Correctly anchor implicit number to string conversions in Lua/C API. -
- Fix various stack limit checks. -
- x64: Use thread-safe exceptions for external unwinding (GCC platforms). -
- x64: Fix result type of cdata index conversions. -
- x64: Fix math.random() and bit.bswap() code generation. -
- x64: Fix lightuserdata comparisons. -
- x64: Always extend stack-passed arguments to pointer size. -
- ARM: Many fixes to code generation backend. -
- PPC/e500: Fix dispatch for binop metamethods. -
- PPC/e500: Save/restore condition registers when entering/leaving the VM. -
- PPC/e500: Fix write barrier in stores of strings to upvalues. -
- - FFI library:
-
-
-
- Fix C comment parsing. -
- Fix snapshot optimization for cdata comparisons. -
- Fix recording of const/enum lookups in namespaces. -
- Fix call argument and return handling for I8/U8/I16/U16 types. -
- Fix unfused loads of float fields. -
- Fix ffi.string() recording. -
- Save GetLastError() around ffi.load() and symbol -resolving, too. -
- Improve ld script detection in ffi.load(). -
- Record loads/stores to external variables in namespaces. -
- Compile calls to stdcall, fastcall and vararg functions. -
- Treat function ctypes like pointers in comparisons. -
- Resolve __call metamethod for pointers, too. -
- Record C function calls with bool return values. -
- Record ffi.errno(). -
- x86: Fix number to uint32_t conversion rounding. -
- x86: Fix 64 bit arithmetic in assembler backend. -
- x64: Fix struct-by-value calling conventions. -
- ARM: Ensure invocation of SPLIT pass for float conversions. -
- - Structural and performance enhancements:
-
-
-
- Display trace types with -jv and -jdump. -
- Record isolated calls. But prefer recording loops over calls. -
- Specialize to prototype for non-monomorphic functions. Solves the -trace-explosion problem for closure-heavy programming styles. -
- Always generate a portable vmdef.lua. Easier for distros. -
-
LuaJIT 2.0.0-beta8 — 2011-06-23
--
-
- New features:
-
-
-
- Soft-float ARM port of LuaJIT is complete. -
- Add support for bytecode loading/saving and -b command line -option. -
- From Lua 5.2: __len metamethod for tables -(disabled by default). -
- - Correctness and completeness:
-
-
-
- ARM: Misc. fixes for interpreter. -
- x86/x64: Fix bit.* argument checking in interpreter. -
- Catch early out-of-memory in memory allocator initialization. -
- Fix data-flow analysis for paths leading to an upvalue close. -
- Fix check for missing arguments in string.format(). -
- Fix Solaris/x86 build (note: not a supported target). -
- Fix recording of loops with instable directions in side traces. -
- x86/x64: Fix fusion of comparisons with u8/u16 -XLOAD. -
- x86/x64: Fix register allocation for variable shifts. -
- - FFI library:
-
-
-
- Add ffi.errno(). Save errno/GetLastError() -around allocations etc. -
- Fix __gc for VLA/VLS cdata objects. -
- Fix recording of casts from 32 bit cdata pointers to integers. -
- tonumber(cdata) returns nil for non-numbers. -
- Show address pointed to for tostring(pointer). -
- Print NULL pointers as "cdata<... *>: NULL". -
- Support __tostring metamethod for pointers to structs, too. -
- - Structural and performance enhancements:
-
-
-
- More tuning for loop unrolling heuristics. -
- Flatten and compress in-memory debug info (saves ~70%). -
-
LuaJIT 2.0.0-beta7 — 2011-05-05
--
-
- New features:
-
-
-
- ARM port of the LuaJIT interpreter is complete. -
- FFI library: Add ffi.gc(), ffi.metatype(), -ffi.istype(). -
- FFI library: Resolve ld script redirection in ffi.load(). -
- From Lua 5.2: package.searchpath(), fp:read("*L"), -load(string). -
- From Lua 5.2, disabled by default: empty statement, -table.unpack(), modified coroutine.running(). -
- - Correctness and completeness:
-
-
-
- FFI library: numerous fixes. -
- Fix type mismatches in store-to-load forwarding. -
- Fix error handling within metamethods. -
- Fix table.maxn(). -
- Improve accuracy of x^-k on x64. -
- Fix code generation for Intel Atom in x64 mode. -
- Fix narrowing of POW. -
- Fix recording of retried fast functions. -
- Fix code generation for bit.bnot() and multiplies. -
- Fix error location within cpcall frames. -
- Add workaround for old libgcc unwind bug. -
- Fix lua_yield() and getmetatable(lightuserdata) on x64. -
- Misc. fixes for PPC/e500 interpreter. -
- Fix stack slot updates for down-recursion. -
- - Structural and performance enhancements:
-
-
-
- Add dual-number mode (int/double) for the VM. Enabled for ARM. -
- Improve narrowing of arithmetic operators and for loops. -
- Tune loop unrolling heuristics and increase trace recorder limits. -
- Eliminate dead slots in snapshots using bytecode data-flow analysis. -
- Avoid phantom stores to proxy tables. -
- Optimize lookups in empty proxy tables. -
- Improve bytecode optimization of and/or operators. -
-
LuaJIT 2.0.0-beta6 — 2011-02-11
--
-
- New features:
-
-
-
- PowerPC/e500v2 port of the LuaJIT interpreter is complete. -
- Various minor features from Lua 5.2: Hex escapes in literals, -'\*' escape, reversible string.format("%q",s), -"%g" pattern, table.sort checks callbacks, -os.exit(status|true|false[,close]). -
- Lua 5.2 __pairs and __ipairs metamethods -(disabled by default). -
- Initial release of the FFI library. -
- - Correctness and completeness:
-
-
-
- Fix string.format() for non-finite numbers. -
- Fix memory leak when compiled to use the built-in allocator. -
- x86/x64: Fix unnecessary resize in TSETM bytecode. -
- Fix various GC issues with traces and jit.flush(). -
- x64: Fix fusion of indexes for array references. -
- x86/x64: Fix stack overflow handling for coroutine results. -
- Enable low-2GB memory allocation on FreeBSD/x64. -
- Fix collectgarbage("count") result if more than 2GB is in use. -
- Fix parsing of hex floats. -
- x86/x64: Fix loop branch inversion with trailing -HREF+NE/EQ. -
- Add jit.os string. -
- coroutine.create() permits running C functions, too. -
- Fix OSX build to work with newer ld64 versions. -
- Fix bytecode optimization of and/or operators. -
- - Structural and performance enhancements:
-
-
-
- Emit specialized bytecode for pairs()/next(). -
- Improve bytecode coalescing of nil constants. -
- Compile calls to vararg functions. -
- Compile select(). -
- Improve alias analysis, esp. for loads from allocations. -
- Tuning of various compiler heuristics. -
- Refactor and extend IR conversion instructions. -
- x86/x64: Various backend enhancements related to the FFI. -
- Add SPLIT pass to split 64 bit IR instructions for 32 bit CPUs. -
-
LuaJIT 2.0.0-beta5 — 2010-08-24
--
-
- Correctness and completeness:
-
-
-
- Fix trace exit dispatch to function headers. -
- Fix Windows and OSX builds with LUAJIT_DISABLE_JIT. -
- Reorganize and fix placement of generated machine code on x64. -
- Fix TNEW in x64 interpreter. -
- Do not eliminate PHIs for values only referenced from side exits. -
- OS-independent canonicalization of strings for non-finite numbers. -
- Fix string.char() range check on x64. -
- Fix tostring() resolving within print(). -
- Fix error handling for next(). -
- Fix passing of constant arguments to external calls on x64. -
- Fix interpreter argument check for two-argument SSE math functions. -
- Fix C frame chain corruption caused by lua_cpcall(). -
- Fix return from pcall() within active hook. -
- - Structural and performance enhancements:
-
-
-
- Replace on-trace GC frame syncing with interpreter exit. -
- Improve hash lookup specialization by not removing dead keys during GC. -
- Turn traces into true GC objects. -
- Avoid starting a GC cycle immediately after library init. -
- Add weak guards to improve dead-code elimination. -
- Speed up string interning. -
-
LuaJIT 2.0.0-beta4 — 2010-03-28
--
-
- Correctness and completeness:
-
-
-
- Fix precondition for on-trace creation of table keys. -
- Fix {f()} on x64 when table is resized. -
- Fix folding of ordered comparisons with same references. -
- Fix snapshot restores for multi-result bytecodes. -
- Fix potential hang when recording bytecode with nested closures. -
- Fix recording of getmetatable(), tonumber() and bad argument types. -
- Fix SLOAD fusion across returns to lower frames. -
- - Structural and performance enhancements:
-
-
-
- Add array bounds check elimination. -Oabc is enabled by default. -
- More tuning for x64, e.g. smaller table objects. -
-
LuaJIT 2.0.0-beta3 — 2010-03-07
--
-
- LuaJIT x64 port:
-
-
-
- Port integrated memory allocator to Linux/x64, Windows/x64 and OSX/x64. -
- Port interpreter and JIT compiler to x64. -
- Port DynASM to x64. -
- Many 32/64 bit cleanups in the VM. -
- Allow building the interpreter with either x87 or SSE2 arithmetics. -
- Add external unwinding and C++ exception interop (default on x64). -
- - Correctness and completeness:
-
-
-
- Fix constructor bytecode generation for certain conditional values. -
- Fix some cases of ordered string comparisons. -
- Fix lua_tocfunction(). -
- Fix cutoff register in JMP bytecode for some conditional expressions. -
- Fix PHI marking algorithm for references from variant slots. -
- Fix package.cpath for non-default PREFIX. -
- Fix DWARF2 frame unwind information for interpreter on OSX. -
- Drive the GC forward on string allocations in the parser. -
- Implement call/return hooks (zero-cost if disabled). -
- Implement yield from C hooks. -
- Disable JIT compiler on older non-SSE2 CPUs instead of aborting. -
- - Structural and performance enhancements:
-
-
-
- Compile recursive code (tail-, up- and down-recursion). -
- Improve heuristics for bytecode penalties and blacklisting. -
- Split CALL/FUNC recording and clean up fast function call semantics. -
- Major redesign of internal function call handling. -
- Improve FOR loop const specialization and integerness checks. -
- Switch to pre-initialized stacks. Avoid frame-clearing. -
- Colocation of prototypes and related data: bytecode, constants, debug info. -
- Cleanup parser and streamline bytecode generation. -
- Add support for weak IR references to register allocator. -
- Switch to compressed, extensible snapshots. -
- Compile returns to frames below the start frame. -
- Improve alias analysis of upvalues using a disambiguation hash value. -
- Compile floor/ceil/trunc to SSE2 helper calls or SSE4.1 instructions. -
- Add generic C call handling to IR and backend. -
- Improve KNUM fuse vs. load heuristics. -
- Compile various io.*() functions. -
- Compile math.sinh(), math.cosh(), math.tanh() -and math.random(). -
-
LuaJIT 2.0.0-beta2 — 2009-11-09
--
-
- Reorganize build system. Build static+shared library on POSIX. -
- Allow C++ exception conversion on all platforms -using a wrapper function. -
- Automatically catch C++ exceptions and rethrow Lua error -(DWARF2 only). -
- Check for the correct x87 FPU precision at strategic points. -
- Always use wrappers for libm functions. -
- Resurrect metamethod name strings before copying them. -
- Mark current trace, even if compiler is idle. -
- Ensure FILE metatable is created only once. -
- Fix type comparisons when different integer types are involved. -
- Fix getmetatable() recording. -
- Fix TDUP with dead keys in template table. -
- jit.flush(tr) returns status. -Prevent manual flush of a trace that's still linked. -
- Improve register allocation heuristics for invariant references. -
- Compile the push/pop variants of table.insert() and -table.remove(). -
- Compatibility with MSVC link /debug. -
- Fix lua_iscfunction(). -
- Fix math.random() when compiled with -fpic (OSX). -
- Fix table.maxn(). -
- Bump MACOSX_DEPLOYMENT_TARGET to 10.4 -
- luaL_check*() and luaL_opt*() now support
-negative arguments, too.
-This matches the behavior of Lua 5.1, but not the specification.
-
LuaJIT 2.0.0-beta1 — 2009-10-31
--
-
- This is the first public release of LuaJIT 2.0. -
- The whole VM has been rewritten from the ground up, so there's -no point in listing differences over earlier versions. -
-