Changeset 43401 in webkit for trunk/JavaScriptCore/jit/JITStubs.cpp

Timestamp:

May 8, 2009, 8:08:41 AM (16 years ago)

Author:

[email protected]

Message:

2009-05-08 Cameron Zwarich <​[email protected]>

Reviewed by Maciej Stachowiak.

Add a new opcode jnlesseq, and optimize its compilation in the JIT using
techniques similar to what were used to optimize jnless in r43363.

This gives a 0.7% speedup on SunSpider, particularly on the tests 3d-cube,
control-flow-recursive, date-format-xparb, and string-base64.

• bytecode/CodeBlock.cpp: (JSC::CodeBlock::dump): Add support for dumping op_jnlesseq.
• bytecode/Opcode.h: Add op_jnlesseq to the list of opcodes.
• bytecompiler/BytecodeGenerator.cpp: (JSC::BytecodeGenerator::emitJumpIfFalse): Add a peephole optimization for op_jnlesseq when emitting lesseq followed by a jump.
• interpreter/Interpreter.cpp: (JSC::Interpreter::privateExecute): Add case for op_jnlesseq.
• jit/JIT.cpp: (JSC::JIT::privateCompileMainPass): Add case for op_jnlesseq. (JSC::JIT::privateCompileSlowCases): Add case for op_jnlesseq.
• jit/JIT.h:
• jit/JITArithmetic.cpp: (JSC::JIT::compileFastArith_op_jnlesseq): Added. (JSC::JIT::compileFastArithSlow_op_jnlesseq): Added.
• jit/JITStubs.cpp: (JSC::JITStubs::cti_op_jlesseq): Added.
• jit/JITStubs.h:

File:

• trunk/JavaScriptCore/jit/JITStubs.cpp (modified) (1 diff)

trunk/JavaScriptCore/jit/JITStubs.cpp

@@ -1782 +1782 @@
 }
 
+int JITStubs::cti_op_jlesseq(STUB_ARGS_DECLARATION)
+{
+    STUB_INIT_STACK_FRAME(stackFrame);
+
+    JSValue src1 = stackFrame.args[0].jsValue();
+    JSValue src2 = stackFrame.args[1].jsValue();
+    CallFrame* callFrame = stackFrame.callFrame;
+
+    bool result = jsLessEq(callFrame, src1, src2);
+    CHECK_FOR_EXCEPTION_AT_END();
+    return result;
+}
+
 EncodedJSValue JITStubs::cti_op_not(STUB_ARGS_DECLARATION)
 {