Changeset 58935 in webkit for trunk/JavaScriptCore/JavaScriptCore.xcodeproj/project.pbxproj

Timestamp:

May 6, 2010, 9:58:02 PM (15 years ago)

Author:

[email protected]

Message:

Bug 38714 - Add result caching for Math.sin

Reviewed by Geoff Garen.

Math.sin is frequently called with the same operand, caching the result should
improve performance. CachedTranscendentalFunction adds a generic mechanism to
cache results for pure functions with the signature "double func(double)", and
where NaN maps to NaN.

CachedTranscendentalFunction uses a very simple hash function designed to be
fast to execute since we cannot cache the result, and trivial to JIT generate,
should we wish to do so.

• JavaScriptCore.xcodeproj/project.pbxproj:
• runtime/CachedTranscendentalFunction.h: Added.

(JSC::CachedTranscendentalFunction::CachedTranscendentalFunction):
(JSC::CachedTranscendentalFunction::~CachedTranscendentalFunction):
(JSC::CachedTranscendentalFunction::operator()):
(JSC::CachedTranscendentalFunction::initialize):
(JSC::CachedTranscendentalFunction::hash):

• runtime/JSGlobalData.h:
• runtime/MathObject.cpp:

(JSC::mathProtoFuncSin):

• wtf/Platform.h:

File:

• trunk/JavaScriptCore/JavaScriptCore.xcodeproj/project.pbxproj (modified) (4 diffs)

trunk/JavaScriptCore/JavaScriptCore.xcodeproj/project.pbxproj

@@ -212 +212 @@
                 8698B86910D44D9400D8D01B /* StringBuilder.h in Headers */ = {isa = PBXBuildFile; fileRef = 8698B86810D44D9400D8D01B /* StringBuilder.h */; settings = {ATTRIBUTES = (Private, ); }; };
                 8698BB3910D86BAF00D8D01B /* UStringImpl.h in Headers */ = {isa = PBXBuildFile; fileRef = 8698BB3710D86BAF00D8D01B /* UStringImpl.h */; settings = {ATTRIBUTES = (Private, ); }; };
+                869D04AF1193B54D00803475 /* CachedTranscendentalFunction.h in Headers */ = {isa = PBXBuildFile; fileRef = 869D04AE1193B54D00803475 /* CachedTranscendentalFunction.h */; settings = {ATTRIBUTES = (Private, ); }; };
                 869EBCB70E8C6D4A008722CC /* ResultType.h in Headers */ = {isa = PBXBuildFile; fileRef = 869EBCB60E8C6D4A008722CC /* ResultType.h */; settings = {ATTRIBUTES = (Private, ); }; };
                 86A90ED00EE7D51F00AB350D /* JITArithmetic.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 86A90ECF0EE7D51F00AB350D /* JITArithmetic.cpp */; };
@@ -764 +765 @@
                 8698B86810D44D9400D8D01B /* StringBuilder.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = StringBuilder.h; sourceTree = "<group>"; };
                 8698BB3710D86BAF00D8D01B /* UStringImpl.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = UStringImpl.h; sourceTree = "<group>"; };
+                869D04AE1193B54D00803475 /* CachedTranscendentalFunction.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = CachedTranscendentalFunction.h; sourceTree = "<group>"; };
                 869EBCB60E8C6D4A008722CC /* ResultType.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ResultType.h; sourceTree = "<group>"; };
                 86A90ECF0EE7D51F00AB350D /* JITArithmetic.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = JITArithmetic.cpp; sourceTree = "<group>"; };
@@ -1524 +1526 @@
                                 BC7952340E15EB5600A898AB /* BooleanPrototype.cpp */,
                                 BC7952350E15EB5600A898AB /* BooleanPrototype.h */,
+                                869D04AE1193B54D00803475 /* CachedTranscendentalFunction.h */,
                                 BCA62DFE0E2826230004F30D /* CallData.cpp */,
                                 145C507F0D9DF63B0088F6B9 /* CallData.h */,
@@ -2127 +2130 @@
                                 A7386554118697B400540279 /* SpecializedThunkJIT.h in Headers */,
                                 A7386556118697B400540279 /* ThunkGenerators.h in Headers */,
+                                869D04AF1193B54D00803475 /* CachedTranscendentalFunction.h in Headers */,
                         );
                         runOnlyForDeploymentPostprocessing = 0;