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Issue 6350021: Introduce ToNumber stub and use it in non-optimized code for to-number conver... (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/
Patch Set: '' Created 9 years, 11 months ago
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1 // Copyright 2011 the V8 project authors. All rights reserved. 1 // Copyright 2011 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without 2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are 3 // modification, are permitted provided that the following conditions are
4 // met: 4 // met:
5 // 5 //
6 // * Redistributions of source code must retain the above copyright 6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer. 7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above 8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following 9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided 10 // disclaimer in the documentation and/or other materials provided
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31 31
32 #include "code-stubs.h" 32 #include "code-stubs.h"
33 #include "bootstrapper.h" 33 #include "bootstrapper.h"
34 #include "jsregexp.h" 34 #include "jsregexp.h"
35 #include "regexp-macro-assembler.h" 35 #include "regexp-macro-assembler.h"
36 36
37 namespace v8 { 37 namespace v8 {
38 namespace internal { 38 namespace internal {
39 39
40 #define __ ACCESS_MASM(masm) 40 #define __ ACCESS_MASM(masm)
41
42 void ToNumberStub::Generate(MacroAssembler* masm) {
43 // The ToNumber stub takes one argument in eax.
44 NearLabel check_heap_number, call_builtin;
45 __ test(eax, Immediate(kSmiTagMask));
46 __ j(not_zero, &check_heap_number);
47 __ ret(0);
48
49 __ bind(&check_heap_number);
50 __ mov(ebx, FieldOperand(eax, HeapObject::kMapOffset));
51 __ cmp(Operand(ebx), Immediate(Factory::heap_number_map()));
52 __ j(not_equal, &call_builtin);
53 __ ret(0);
54
55 __ bind(&call_builtin);
56 __ pop(ecx); // Pop return address.
57 __ push(eax);
58 __ push(ecx); // Push return address.
59 __ InvokeBuiltin(Builtins::TO_NUMBER, JUMP_FUNCTION);
60 }
61
62
41 void FastNewClosureStub::Generate(MacroAssembler* masm) { 63 void FastNewClosureStub::Generate(MacroAssembler* masm) {
42 // Create a new closure from the given function info in new 64 // Create a new closure from the given function info in new
43 // space. Set the context to the current context in esi. 65 // space. Set the context to the current context in esi.
44 Label gc; 66 Label gc;
45 __ AllocateInNewSpace(JSFunction::kSize, eax, ebx, ecx, &gc, TAG_OBJECT); 67 __ AllocateInNewSpace(JSFunction::kSize, eax, ebx, ecx, &gc, TAG_OBJECT);
46 68
47 // Get the function info from the stack. 69 // Get the function info from the stack.
48 __ mov(edx, Operand(esp, 1 * kPointerSize)); 70 __ mov(edx, Operand(esp, 1 * kPointerSize));
49 71
50 // Compute the function map in the current global context and set that 72 // Compute the function map in the current global context and set that
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6483 // Do a tail call to the rewritten stub. 6505 // Do a tail call to the rewritten stub.
6484 __ jmp(Operand(edi)); 6506 __ jmp(Operand(edi));
6485 } 6507 }
6486 6508
6487 6509
6488 #undef __ 6510 #undef __
6489 6511
6490 } } // namespace v8::internal 6512 } } // namespace v8::internal
6491 6513
6492 #endif // V8_TARGET_ARCH_IA32 6514 #endif // V8_TARGET_ARCH_IA32
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