2009-01-01 Gavin Barraclough <barraclough@apple.com>
Reviewed by Darin Adler.
Allow 32-bit integers to be stored in JSImmediates, on x64-bit.
Presently the top 32-bits of a 64-bit JSImmediate serve as a sign extension of a 31-bit
int stored in the low word (shifted left by one, to make room for a tag). In the new
format, the top 31-bits serve as a sign extension of a 32-bit int, still shifted left by
one.
The new behavior is enabled using a flag in Platform.h, 'WTF_USE_ALTERNATE_JSIMMEDIATE'.
When this is set the constants defining the range of ints allowed to be stored as
JSImmediate values is extended. The code in JSImmediate.h can safely operate on either
format. This patch updates the JIT so that it can also operate with the new format.
~2% progression on x86-64, with & without the JIT, on sunspider & v8 tests.
* assembler/MacroAssembler.h:
(JSC::MacroAssembler::addPtr):
(JSC::MacroAssembler::orPtr):
(JSC::MacroAssembler::or32):
(JSC::MacroAssembler::rshiftPtr):
(JSC::MacroAssembler::rshift32):
(JSC::MacroAssembler::subPtr):
(JSC::MacroAssembler::xorPtr):
(JSC::MacroAssembler::xor32):
(JSC::MacroAssembler::move):
(JSC::MacroAssembler::compareImm64ForBranch):
(JSC::MacroAssembler::compareImm64ForBranchEquality):
(JSC::MacroAssembler::jePtr):
(JSC::MacroAssembler::jgePtr):
(JSC::MacroAssembler::jlPtr):
(JSC::MacroAssembler::jlePtr):
(JSC::MacroAssembler::jnePtr):
(JSC::MacroAssembler::jnzSubPtr):
(JSC::MacroAssembler::joAddPtr):
(JSC::MacroAssembler::jzSubPtr):
* assembler/X86Assembler.h:
(JSC::X86Assembler::addq_rr):
(JSC::X86Assembler::orq_ir):
(JSC::X86Assembler::subq_ir):
(JSC::X86Assembler::xorq_rr):
(JSC::X86Assembler::sarq_CLr):
(JSC::X86Assembler::sarq_i8r):
(JSC::X86Assembler::cmpq_ir):
* jit/JIT.cpp:
(JSC::JIT::compileOpStrictEq):
(JSC::JIT::privateCompileMainPass):
(JSC::JIT::privateCompileSlowCases):
(JSC::JIT::privateCompileCTIMachineTrampolines):
* jit/JIT.h:
* jit/JITArithmetic.cpp:
(JSC::JIT::compileFastArith_op_lshift):
(JSC::JIT::compileFastArithSlow_op_lshift):
(JSC::JIT::compileFastArith_op_rshift):
(JSC::JIT::compileFastArithSlow_op_rshift):
(JSC::JIT::compileFastArith_op_bitand):
(JSC::JIT::compileFastArithSlow_op_bitand):
(JSC::JIT::compileFastArith_op_mod):
(JSC::JIT::compileFastArithSlow_op_mod):
(JSC::JIT::compileFastArith_op_add):
(JSC::JIT::compileFastArithSlow_op_add):
(JSC::JIT::compileFastArith_op_mul):
(JSC::JIT::compileFastArithSlow_op_mul):
(JSC::JIT::compileFastArith_op_post_inc):
(JSC::JIT::compileFastArithSlow_op_post_inc):
(JSC::JIT::compileFastArith_op_post_dec):
(JSC::JIT::compileFastArithSlow_op_post_dec):
(JSC::JIT::compileFastArith_op_pre_inc):
(JSC::JIT::compileFastArithSlow_op_pre_inc):
(JSC::JIT::compileFastArith_op_pre_dec):
(JSC::JIT::compileFastArithSlow_op_pre_dec):
(JSC::JIT::compileBinaryArithOp):
* jit/JITInlineMethods.h:
(JSC::JIT::getConstantOperand):
(JSC::JIT::getConstantOperandImmediateInt):
(JSC::JIT::isOperandConstantImmediateInt):
(JSC::JIT::isOperandConstant31BitImmediateInt):
(JSC::JIT::emitFastArithDeTagImmediate):
(JSC::JIT::emitFastArithDeTagImmediateJumpIfZero):
(JSC::JIT::emitFastArithReTagImmediate):
(JSC::JIT::emitFastArithImmToInt):
(JSC::JIT::emitFastArithIntToImmNoCheck):
* runtime/JSImmediate.h:
(JSC::JSImmediate::isPositiveNumber):
(JSC::JSImmediate::isNegative):
(JSC::JSImmediate::rightShiftImmediateNumbers):
(JSC::JSImmediate::canDoFastAdditiveOperations):
(JSC::JSImmediate::makeValue):
(JSC::JSImmediate::makeInt):
(JSC::JSImmediate::makeBool):
(JSC::JSImmediate::intValue):
(JSC::JSImmediate::rawValue):
(JSC::JSImmediate::toBoolean):
(JSC::JSImmediate::from):
* wtf/Platform.h:
git-svn-id: http://svn.webkit.org/repository/webkit/trunk@39540 268f45cc-cd09-0410-ab3c-d52691b4dbfc
9 files changed
