mirror of
https://github.com/LuaJIT/LuaJIT.git
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3f1f9e11f4
Compile math.sinh(), math.cosh(), math.tanh() and math.random(). Compile various io.*() functions. Drive the GC forward on string allocations in the parser. Improve KNUM fuse vs. load heuristics. Add abstract C call handling to IR.
329 lines
12 KiB
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329 lines
12 KiB
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<title>LuaJIT Change History</title>
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<meta name="Author" content="Mike Pall">
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<meta name="Copyright" content="Copyright (C) 2005-2009, Mike Pall">
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<div id="site">
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<a href="http://luajit.org"><span>Lua<span id="logo">JIT</span></span></a>
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<div id="head">
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<h1>LuaJIT Change History</h1>
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</div>
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<ul><li>
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<a href="luajit.html">LuaJIT</a>
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<ul><li>
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<a href="install.html">Installation</a>
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</li><li>
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<a href="running.html">Running</a>
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<a href="api.html">API Extensions</a>
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<a href="status.html">Status</a>
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<ul><li>
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<a class="current" href="changes.html">Changes</a>
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</li><li>
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<a href="faq.html">FAQ</a>
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<a href="http://luajit.org/download.html">Download <span class="ext">»</span></a>
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</li></ul>
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</div>
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<div id="main">
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<p>
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This is a list of changes between the released versions of LuaJIT.<br>
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The current <span style="color: #c00000;">development version</span> is <strong>LuaJIT 2.0.0-beta2</strong>.<br>
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The current <span style="color: #0000c0;">stable version</span> is <strong>LuaJIT 1.1.5</strong>.
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</p>
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<p>
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Please check the
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<a href="http://luajit.org/changes.html"><span class="ext">»</span> Online Change History</a>
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to see whether newer versions are available.
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</p>
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<div class="major" style="background: #d0d0d0;">
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<h2 id="snap">Development Snapshot</h2>
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<ul>
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<li>Add abstract C call handling to IR.</li>
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<li>Improve KNUM fuse vs. load heuristics.</li>
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<li>Drive the GC forward on string allocations in the parser.</li>
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<li>Compile various <tt>io.*()</tt> functions.</li>
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<li>Compile <tt>math.sinh()</tt>, <tt>math.cosh()</tt>, <tt>math.tanh()</tt>
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and <tt>math.random()</tt>.</li>
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<li>Fix <tt>lua_tocfunction()</tt>.</li>
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<li>Fix cutoff register in JMP bytecode for some conditional expressions.</li>
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<li>Fix PHI marking algorithm for references from variant slots.</li>
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<li>Fix <tt>package.cpath</tt> for non-default PREFIX.</li>
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<li>Fix DWARF2 frame unwind information for interpreter on OSX.</li>
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</ul>
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</div>
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<div class="major" style="background: #ffd0d0;">
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<h2 id="LuaJIT-2.0.0-beta2">LuaJIT 2.0.0-beta2 — 2009-11-09</h2>
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<ul>
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<li>Reorganize build system. Build static+shared library on POSIX.</li>
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<li>Allow C++ exception conversion on all platforms
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using a wrapper function.</li>
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<li>Automatically catch C++ exceptions and rethrow Lua error
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(DWARF2 only).</li>
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<li>Check for the correct x87 FPU precision at strategic points.</li>
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<li>Always use wrappers for libm functions.</li>
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<li>Resurrect metamethod name strings before copying them.</li>
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<li>Mark current trace, even if compiler is idle.</li>
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<li>Ensure FILE metatable is created only once.</li>
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<li>Fix type comparisons when different integer types are involved.</li>
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<li>Fix <tt>getmetatable()</tt> recording.</li>
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<li>Fix TDUP with dead keys in template table.</li>
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<li><tt>jit.flush(tr)</tt> returns status.
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Prevent manual flush of a trace that's still linked.</li>
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<li>Improve register allocation heuristics for invariant references.</li>
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<li>Compile the push/pop variants of <tt>table.insert()</tt> and
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<tt>table.remove()</tt>.</li>
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<li>Compatibility with MSVC <tt>link /debug</tt>.</li>
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<li>Fix <tt>lua_iscfunction()</tt>.</li>
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<li>Fix <tt>math.random()</tt> when compiled with <tt>-fpic</tt> (OSX).</li>
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<li>Fix <tt>table.maxn()</tt>.</li>
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<li>Bump <tt>MACOSX_DEPLOYMENT_TARGET</tt> to <tt>10.4</tt></li>
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<li><tt>luaL_check*()</tt> and <tt>luaL_opt*()</tt> now support
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negative arguments, too.<br>
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This matches the behavior of Lua 5.1, but not the specification.</li>
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</ul>
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<h2 id="LuaJIT-2.0.0-beta1">LuaJIT 2.0.0-beta1 — 2009-10-31</h2>
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<ul>
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<li>This is the first public release of LuaJIT 2.0.</li>
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<li>The whole VM has been rewritten from the ground up, so there's
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no point in listing differences over earlier versions.</li>
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</ul>
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</div>
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<div class="major" style="background: #d0d0ff;">
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<h2 id="LuaJIT-1.1.5">LuaJIT 1.1.5 — 2008-10-25</h2>
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<ul>
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<li>Merged with Lua 5.1.4. Fixes all
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<a href="http://www.lua.org/bugs.html#5.1.3"><span class="ext">»</span> known bugs in Lua 5.1.3</a>.</li>
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</ul>
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<h2 id="LuaJIT-1.1.4">LuaJIT 1.1.4 — 2008-02-05</h2>
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<ul>
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<li>Merged with Lua 5.1.3. Fixes all
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<a href="http://www.lua.org/bugs.html#5.1.2"><span class="ext">»</span> known bugs in Lua 5.1.2</a>.</li>
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<li>Fixed possible (but unlikely) stack corruption while compiling
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<tt>k^x</tt> expressions.</li>
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<li>Fixed DynASM template for cmpss instruction.</li>
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</ul>
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<h2 id="LuaJIT-1.1.3">LuaJIT 1.1.3 — 2007-05-24</h2>
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<ul>
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<li>Merged with Lua 5.1.2. Fixes all
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<a href="http://www.lua.org/bugs.html#5.1.1"><span class="ext">»</span> known bugs in Lua 5.1.1</a>.</li>
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<li>Merged pending Lua 5.1.x fixes: "return -nil" bug, spurious count hook call.</li>
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<li>Remove a (sometimes) wrong assertion in <tt>luaJIT_findpc()</tt>.</li>
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<li>DynASM now allows labels for displacements and <tt>.aword</tt>.</li>
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<li>Fix some compiler warnings for DynASM glue (internal API change).</li>
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<li>Correct naming for SSSE3 (temporarily known as SSE4) in DynASM and x86 disassembler.</li>
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<li>The loadable debug modules now handle redirection to stdout
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(e.g. <tt>-j trace=-</tt>).</li>
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</ul>
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<h2 id="LuaJIT-1.1.2">LuaJIT 1.1.2 — 2006-06-24</h2>
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<ul>
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<li>Fix MSVC inline assembly: use only local variables with
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<tt>lua_number2int()</tt>.</li>
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<li>Fix "attempt to call a thread value" bug on Mac OS X:
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make values of consts used as lightuserdata keys unique
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to avoid joining by the compiler/linker.</li>
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</ul>
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<h2 id="LuaJIT-1.1.1">LuaJIT 1.1.1 — 2006-06-20</h2>
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<ul>
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<li>Merged with Lua 5.1.1. Fixes all
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<a href="http://www.lua.org/bugs.html#5.1"><span class="ext">»</span> known bugs in Lua 5.1</a>.</li>
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<li>Enforce (dynamic) linker error for EXE/DLL version mismatches.</li>
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<li>Minor changes to DynASM: faster preprocessing, smaller encoding
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for some immediates.</li>
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</ul>
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<p>
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This release is in sync with Coco 1.1.1 (see the
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<a href="http://coco.luajit.org/changes.html"><span class="ext">»</span> Coco Change History</a>).
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</p>
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<h2 id="LuaJIT-1.1.0">LuaJIT 1.1.0 — 2006-03-13</h2>
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<ul>
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<li>Merged with Lua 5.1 (final).</li>
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<li>New JIT call frame setup:
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<ul>
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<li>The C stack is kept 16 byte aligned (faster).
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Mandatory for Mac OS X on Intel, too.</li>
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<li>Faster calling conventions for internal C helper functions.</li>
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<li>Better instruction scheduling for function prologue, OP_CALL and
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OP_RETURN.</li>
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</ul></li>
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<li>Miscellaneous optimizations:
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<ul>
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<li>Faster loads of FP constants. Remove narrow-to-wide store-to-load
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forwarding stalls.</li>
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<li>Use (scalar) SSE2 ops (if the CPU supports it) to speed up slot moves
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and FP to integer conversions.</li>
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<li>Optimized the two-argument form of <tt>OP_CONCAT</tt> (<tt>a..b</tt>).</li>
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<li>Inlined <tt>OP_MOD</tt> (<tt>a%b</tt>).
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With better accuracy than the C variant, too.</li>
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<li>Inlined <tt>OP_POW</tt> (<tt>a^b</tt>). Unroll <tt>x^k</tt> or
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use <tt>k^x = 2^(log2(k)*x)</tt> or call <tt>pow()</tt>.</li>
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</ul></li>
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<li>Changes in the optimizer:
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<ul>
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<li>Improved hinting for table keys derived from table values
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(<tt>t1[t2[x]]</tt>).</li>
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<li>Lookup hinting now works with arbitrary object types and
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supports index chains, too.</li>
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<li>Generate type hints for arithmetic and comparison operators,
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OP_LEN, OP_CONCAT and OP_FORPREP.</li>
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<li>Remove several hint definitions in favour of a generic COMBINE hint.</li>
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<li>Complete rewrite of <tt>jit.opt_inline</tt> module
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(ex <tt>jit.opt_lib</tt>).</li>
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</ul></li>
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<li>Use adaptive deoptimization:
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<ul>
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<li>If runtime verification of a contract fails, the affected
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instruction is recompiled and patched on-the-fly.
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Regular programs will trigger deoptimization only occasionally.</li>
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<li>This avoids generating code for uncommon fallback cases
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most of the time. Generated code is up to 30% smaller compared to
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LuaJIT 1.0.3.</li>
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<li>Deoptimization is used for many opcodes and contracts:
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<ul>
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<li>OP_CALL, OP_TAILCALL: type mismatch for callable.</li>
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<li>Inlined calls: closure mismatch, parameter number and type mismatches.</li>
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<li>OP_GETTABLE, OP_SETTABLE: table or key type and range mismatches.</li>
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<li>All arithmetic and comparison operators, OP_LEN, OP_CONCAT,
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OP_FORPREP: operand type and range mismatches.</li>
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</ul></li>
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<li>Complete redesign of the debug and traceback info
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(bytecode ↔ mcode) to support deoptimization.
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Much more flexible and needs only 50% of the space.</li>
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<li>The modules <tt>jit.trace</tt>, <tt>jit.dumphints</tt> and
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<tt>jit.dump</tt> handle deoptimization.</li>
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</ul></li>
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<li>Inlined many popular library functions
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(for commonly used arguments only):
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<ul>
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<li>Most <tt>math.*</tt> functions (the 18 most used ones)
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[2x-10x faster].</li>
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<li><tt>string.len</tt>, <tt>string.sub</tt> and <tt>string.char</tt>
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[2x-10x faster].</li>
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<li><tt>table.insert</tt>, <tt>table.remove</tt> and <tt>table.getn</tt>
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[3x-5x faster].</li>
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<li><tt>coroutine.yield</tt> and <tt>coroutine.resume</tt>
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[3x-5x faster].</li>
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<li><tt>pairs</tt>, <tt>ipairs</tt> and the corresponding iterators
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[8x-15x faster].</li>
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</ul></li>
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<li>Changes in the core and loadable modules and the stand-alone executable:
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<ul>
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<li>Added <tt>jit.version</tt>, <tt>jit.version_num</tt>
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and <tt>jit.arch</tt>.</li>
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<li>Reorganized some internal API functions (<tt>jit.util.*mcode*</tt>).</li>
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<li>The <tt>-j dump</tt> output now shows JSUB names, too.</li>
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<li>New x86 disassembler module written in pure Lua. No dependency
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on ndisasm anymore. Flexible API, very compact (500 lines)
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and complete (x87, MMX, SSE, SSE2, SSE3, SSSE3, privileged instructions).</li>
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<li><tt>luajit -v</tt> prints the LuaJIT version and copyright
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on a separate line.</li>
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</ul></li>
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<li>Added SSE, SSE2, SSE3 and SSSE3 support to DynASM.</li>
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<li>Miscellaneous doc changes. Added a section about
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<a href="install.html#embedding">embedding LuaJIT</a>.</li>
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</ul>
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<p>
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This release is in sync with Coco 1.1.0 (see the
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<a href="http://coco.luajit.org/changes.html"><span class="ext">»</span> Coco Change History</a>).
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</p>
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</div>
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<div class="major" style="background: #ffffd0;">
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<h2 id="LuaJIT-1.0.3">LuaJIT 1.0.3 — 2005-09-08</h2>
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<ul>
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<li>Even more docs.</li>
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<li>Unified closure checks in <tt>jit.*</tt>.</li>
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<li>Fixed some range checks in <tt>jit.util.*</tt>.</li>
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<li>Fixed __newindex call originating from <tt>jit_settable_str()</tt>.</li>
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<li>Merged with Lua 5.1 alpha (including early bugfixes).</li>
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</ul>
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<p>
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This is the first public release of LuaJIT.
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</p>
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<h2 id="LuaJIT-1.0.2">LuaJIT 1.0.2 — 2005-09-02</h2>
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<ul>
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<li>Add support for flushing the Valgrind translation cache <br>
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(<tt>MYCFLAGS= -DUSE_VALGRIND</tt>).</li>
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<li>Add support for freeing executable mcode memory to the <tt>mmap()</tt>-based
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variant for POSIX systems.</li>
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<li>Reorganized the C function signature handling in
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<tt>jit.opt_lib</tt>.</li>
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<li>Changed to index-based hints for inlining C functions.
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Still no support in the backend for inlining.</li>
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<li>Hardcode <tt>HEAP_CREATE_ENABLE_EXECUTE</tt> value if undefined.</li>
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<li>Misc. changes to the <tt>jit.*</tt> modules.</li>
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<li>Misc. changes to the Makefiles.</li>
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<li>Lots of new docs.</li>
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<li>Complete doc reorg.</li>
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</ul>
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<p>
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Not released because Lua 5.1 alpha came out today.
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</p>
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<h2 id="LuaJIT-1.0.1">LuaJIT 1.0.1 — 2005-08-31</h2>
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<ul>
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<li>Missing GC step in <tt>OP_CONCAT</tt>.</li>
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<li>Fix result handling for C –> JIT calls.</li>
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<li>Detect CPU feature bits.</li>
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<li>Encode conditional moves (<tt>fucomip</tt>) only when supported.</li>
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<li>Add fallback instructions for FP compares.</li>
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<li>Add support for <tt>LUA_COMPAT_VARARG</tt>. Still disabled by default.</li>
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<li>MSVC needs a specific place for the <tt>CALLBACK</tt> attribute
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(David Burgess).</li>
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<li>Misc. doc updates.</li>
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</ul>
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<p>
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Interim non-public release.
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Special thanks to Adam D. Moss for reporting most of the bugs.
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</p>
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<h2 id="LuaJIT-1.0.0">LuaJIT 1.0.0 — 2005-08-29</h2>
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<p>
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This is the initial non-public release of LuaJIT.
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</p>
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</div>
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<br class="flush">
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</div>
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<div id="foot">
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<hr class="hide">
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Copyright © 2005-2009 Mike Pall
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<span class="noprint">
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·
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<a href="contact.html">Contact</a>
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</span>
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</div>
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</body>
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</html>
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