2010-04-29 Oliver Hunt <oliver@apple.com>
Reviewed by Gavin Barraclough.
Add codegen support for unsigned right shift
https://bugs.webkit.org/show_bug.cgi?id=38375
Expose unsigned right shift in the macro assembler, and make use of it
from the jit. Currently if the result is outside the range 0..2^31-1
we simply fall back to the slow case, even in JSVALUE64 and JSVALUE32_64
where technically we could still return an immediate value.
* assembler/MacroAssemblerARM.h:
(JSC::MacroAssemblerARM::urshift32):
* assembler/MacroAssemblerARMv7.h:
(JSC::MacroAssemblerARMv7::urshift32):
* assembler/MacroAssemblerX86Common.h:
(JSC::MacroAssemblerX86Common::urshift32):
* assembler/X86Assembler.h:
(JSC::X86Assembler::):
(JSC::X86Assembler::shrl_i8r):
(JSC::X86Assembler::shrl_CLr):
Add unsigned right shift to the x86 assembler
* jit/JIT.cpp:
(JSC::JIT::privateCompileMainPass):
(JSC::JIT::privateCompileSlowCases):
op_rshift no longer simply get thrown to a stub function
* jit/JIT.h:
* jit/JITArithmetic.cpp:
(JSC::JIT::emit_op_urshift):
(JSC::JIT::emitSlow_op_urshift):
JSVALUE32 and JSVALUE64 implementation. Only supports
double lhs in JSVALUE64.
* jit/JITArithmetic32_64.cpp:
(JSC::JIT::emit_op_rshift):
(JSC::JIT::emitSlow_op_rshift):
(JSC::JIT::emit_op_urshift):
(JSC::JIT::emitSlow_op_urshift):
Refactor right shift code to have shared implementation between signed
and unsigned versions.
git-svn-id: http://svn.webkit.org/repository/webkit/trunk@58562 268f45cc-cd09-0410-ab3c-d52691b4dbfc
diff --git a/JavaScriptCore/jit/JIT.h b/JavaScriptCore/jit/JIT.h
index 22e7aba..dbd311b 100644
--- a/JavaScriptCore/jit/JIT.h
+++ b/JavaScriptCore/jit/JIT.h
@@ -734,6 +734,7 @@
void emit_op_to_jsnumber(Instruction*);
void emit_op_to_primitive(Instruction*);
void emit_op_unexpected_load(Instruction*);
+ void emit_op_urshift(Instruction*);
#if ENABLE(JIT_OPTIMIZE_MOD)
void softModulo();
#endif
@@ -784,6 +785,11 @@
void emitSlow_op_sub(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_to_jsnumber(Instruction*, Vector<SlowCaseEntry>::iterator&);
void emitSlow_op_to_primitive(Instruction*, Vector<SlowCaseEntry>::iterator&);
+ void emitSlow_op_urshift(Instruction*, Vector<SlowCaseEntry>::iterator&);
+
+
+ void emitRightShift(Instruction*, bool isUnsigned);
+ void emitRightShiftSlowCase(Instruction*, Vector<SlowCaseEntry>::iterator&, bool isUnsigned);
/* These functions are deprecated: Please use JITStubCall instead. */
void emitPutJITStubArg(RegisterID src, unsigned argumentNumber);
