source: webkit/trunk/Source/JavaScriptCore/jit/JITMathICForwards.h

Last change on this file was 206289, checked in by [email protected], 9 years ago

[JSC] Use an inline cache to generate op_negate
​https://bugs.webkit.org/show_bug.cgi?id=162371

Patch by Benjamin Poulain <​[email protected]> on 2016-09-22
Reviewed by Saam Barati.

JSTests:

  • stress/op-negate-inline-cache.js: Added.

Source/JavaScriptCore:

Use an inline cache to reduce the amount of code
required to implement op_negate.

For pure integer negate, the generated asm shrinks
from 147 bytes to 125 bytes (14%).
For double negate, the generated asm shrinks
to 130 bytes (11%).
The average size on Sunspider is 100bytes, this is due
to the op_negates that are never executed and do not
generate much.

  • bytecode/ArithProfile.h:

(JSC::ArithProfile::ArithProfile):
(JSC::ArithProfile::observeLHS):
(JSC::ArithProfile::observeLHSAndRHS):

  • bytecode/BytecodeList.json:
  • bytecode/CodeBlock.cpp:

(JSC::CodeBlock::addJITNegIC):

  • bytecode/CodeBlock.h:
  • bytecompiler/BytecodeGenerator.cpp:

(JSC::BytecodeGenerator::emitUnaryOp):

  • bytecompiler/BytecodeGenerator.h:
  • bytecompiler/NodesCodegen.cpp:

(JSC::UnaryOpNode::emitBytecode):

  • dfg/DFGSpeculativeJIT.cpp:

(JSC::DFG::SpeculativeJIT::compileMathIC):

  • dfg/DFGSpeculativeJIT.h:
  • ftl/FTLLowerDFGToB3.cpp:

(JSC::FTL::DFG::LowerDFGToB3::compileMathIC):

  • jit/CCallHelpers.h:

(JSC::CCallHelpers::setupArgumentsWithExecState):

  • jit/JIT.h:
  • jit/JITArithmetic.cpp:

(JSC::JIT::emit_op_negate):
(JSC::JIT::emitSlow_op_negate):
(JSC::JIT::emitMathICFast):
(JSC::JIT::emitMathICSlow):

  • jit/JITInlines.h:

(JSC::JIT::callOperation):

  • jit/JITMathIC.h:

(JSC::JITMathIC::generateInline):
(JSC::canGenerateWithBinaryProfile):
(JSC::canGenerateWithUnaryProfile):

  • jit/JITMathICForwards.h:
  • jit/JITNegGenerator.cpp:

(JSC::JITNegGenerator::generateInline):
(JSC::JITNegGenerator::generateFastPath):

  • jit/JITNegGenerator.h:

(JSC::JITNegGenerator::JITNegGenerator):
(JSC::JITNegGenerator::arithProfile):
(JSC::JITNegGenerator::didEmitFastPath): Deleted.
(JSC::JITNegGenerator::endJumpList): Deleted.
(JSC::JITNegGenerator::slowPathJumpList): Deleted.

  • jit/JITOperations.cpp:
  • jit/JITOperations.h:
  • llint/LowLevelInterpreter.asm:
  • llint/LowLevelInterpreter32_64.asm:
  • llint/LowLevelInterpreter64.asm:
  • runtime/CommonSlowPaths.cpp:

(JSC::updateArithProfileForUnaryArithOp):
(JSC::SLOW_PATH_DECL):
File size: 1.8 KB
Line 
1/*
2 * Copyright (C) 2016 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#if ENABLE(JIT)
29
30namespace JSC {
31
32template <typename Generator> class JITBinaryMathIC;
33template <typename Generator> class JITUnaryMathIC;
34class JITAddGenerator;
35class JITMulGenerator;
36class JITNegGenerator;
37class JITSubGenerator;
38
39typedef JITBinaryMathIC<JITAddGenerator> JITAddIC;
40typedef JITBinaryMathIC<JITMulGenerator> JITMulIC;
41typedef JITUnaryMathIC<JITNegGenerator> JITNegIC;
42typedef JITBinaryMathIC<JITSubGenerator> JITSubIC;
43
44} // namespace JSC
45
46#endif // ENABLE(JIT)
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