Changeset 43401 in webkit for trunk/JavaScriptCore/jit/JIT.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/JIT.cpp (modified) (2 diffs)

trunk/JavaScriptCore/jit/JIT.cpp

@@ -628 +628 @@
             RECORD_JUMP_TARGET(target + 3);
             NEXT_OPCODE(op_jnless);
+        }
+        case op_jnlesseq: {
+            unsigned target = currentInstruction[3].u.operand;
+            compileFastArith_op_jnlesseq(currentInstruction[1].u.operand, currentInstruction[2].u.operand, target);
+            RECORD_JUMP_TARGET(target + 3);
+            NEXT_OPCODE(op_jnlesseq);
         }
         case op_not: {
@@ -1326 +1332 @@
             compileFastArithSlow_op_jnless(currentInstruction[1].u.operand, currentInstruction[2].u.operand, currentInstruction[3].u.operand, iter);
             NEXT_OPCODE(op_jnless);
+        }
+        case op_jnlesseq: {
+            compileFastArithSlow_op_jnlesseq(currentInstruction[1].u.operand, currentInstruction[2].u.operand, currentInstruction[3].u.operand, iter);
+            NEXT_OPCODE(op_jnlesseq);
         }
         case op_not: {