Changeset 43363 in webkit for trunk/JavaScriptCore/jit/JIT.h

Timestamp:

May 7, 2009, 1:42:59 PM (16 years ago)

Author:

[email protected]

Message:

2009-05-07 Maciej Stachowiak <​[email protected]>

Reviewed by Sam Weinig.

• optimize various cases of branch-fused less

1% speedup on SunSpider overall
13% speedup on math-cordic

• jit/JIT.cpp: (JSC::JIT::privateCompileMainPass): op_loop_if_less: Optimize case of constant as first operand, just as case of constant as second operand. op_jnless: Factored out into compileFastArith_op_jnless. (JSC::JIT::privateCompileSlowCases): op_jnless: Factored out into compileFastArithSlow_op_jnless.
• jit/JIT.h:
• jit/JITArithmetic.cpp: (JSC::JIT::compileFastArith_op_jnless): Factored out from main compile loop.
• Generate inline code for comparison of constant immediate int as first operand to another immediate int, as for loop_if_less

(JSC::JIT::compileFastArithSlow_op_jnless):

• Generate inline code for comparing two floating point numbers.
• Generate code for both cases of comparing a floating point number to a constant immediate int.
• bytecode/CodeBlock.cpp: (JSC::CodeBlock::dump): Fix dumping of op_jnless (tangentially related bugfix).

File:

• trunk/JavaScriptCore/jit/JIT.h (modified) (2 diffs)

trunk/JavaScriptCore/jit/JIT.h

@@ -380 +380 @@
         void compileFastArith_op_lshift(unsigned result, unsigned op1, unsigned op2);
         void compileFastArith_op_rshift(unsigned result, unsigned op1, unsigned op2);
+        void compileFastArith_op_jnless(unsigned op1, unsigned op2, unsigned target);
         void compileFastArith_op_pre_inc(unsigned srcDst);
         void compileFastArith_op_pre_dec(unsigned srcDst);
@@ -391 +392 @@
         void compileFastArithSlow_op_lshift(unsigned result, unsigned op1, unsigned op2, Vector<SlowCaseEntry>::iterator&);
         void compileFastArithSlow_op_rshift(unsigned result, unsigned op1, unsigned op2, Vector<SlowCaseEntry>::iterator&);
+        void compileFastArithSlow_op_jnless(unsigned op1, unsigned op2, unsigned target, Vector<SlowCaseEntry>::iterator&);
         void compileFastArithSlow_op_pre_inc(unsigned srcDst, Vector<SlowCaseEntry>::iterator&);
         void compileFastArithSlow_op_pre_dec(unsigned srcDst, Vector<SlowCaseEntry>::iterator&);