Ignore:
Timestamp:
Dec 3, 2015, 10:49:04 AM (10 years ago)
Author:
[email protected]
Message:

[JSC] Add CLZ support to B3
​https://bugs.webkit.org/show_bug.cgi?id=151799

Patch by Benjamin Poulain <​[email protected]> on 2015-12-03
Reviewed by Michael Saboff.

Previously we were counting on LLVM to select LZCNT
when its available.
Since we have to do that ourself now, I added feature
detection based on the CPUID. The MacroAssembler just
pick the best available lowering based on the platform.

  • assembler/MacroAssemblerX86Common.cpp:
  • assembler/MacroAssemblerX86Common.h:

(JSC::MacroAssemblerX86Common::countLeadingZeros32):
(JSC::MacroAssemblerX86Common::supportsLZCNT):
(JSC::MacroAssemblerX86Common::clz32AfterBsr):

  • assembler/MacroAssemblerX86_64.h:

(JSC::MacroAssemblerX86_64::countLeadingZeros64):
(JSC::MacroAssemblerX86_64::clz64AfterBsr):

  • assembler/X86Assembler.h:

(JSC::X86Assembler::lzcnt_rr):
(JSC::X86Assembler::lzcnt_mr):
(JSC::X86Assembler::lzcntq_rr):
(JSC::X86Assembler::lzcntq_mr):
(JSC::X86Assembler::bsr_mr):
(JSC::X86Assembler::bsrq_rr):
(JSC::X86Assembler::bsrq_mr):

  • b3/B3LowerToAir.cpp:

(JSC::B3::Air::LowerToAir::lower):

  • b3/B3Opcode.cpp:

(WTF::printInternal):

  • b3/B3Opcode.h:
  • b3/B3Validate.cpp:
  • b3/B3Value.cpp:

(JSC::B3::Value::effects):
(JSC::B3::Value::key):
(JSC::B3::Value::typeFor):

  • b3/air/AirOpcode.opcodes:
  • b3/testb3.cpp:

(JSC::B3::countLeadingZero):
(JSC::B3::testClzArg64):
(JSC::B3::testClzMem64):
(JSC::B3::testClzArg32):
(JSC::B3::testClzMem32):
(JSC::B3::doubleOperands):
(JSC::B3::run):

  • ftl/FTLB3Output.h:

(JSC::FTL::Output::ctlz32):

  • ftl/FTLLowerDFGToLLVM.cpp:

(JSC::FTL::DFG::LowerDFGToLLVM::compileArithClz32):

  • ftl/FTLOutput.h:

(JSC::FTL::Output::ctlz32):

File:
1 edited

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