Version 3.3.8

src/ia32/code-stubs-ia32.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 728 matching lines @@
 
   // Tag the result as a smi and we're done.
   STATIC_ASSERT(kSmiTagSize == 1);
   __ lea(eax, Operand(ecx, times_2, kSmiTag));
   __ ret(0);
 
   // Try to store the result in a heap number.
   __ bind(&try_float);
   if (mode_ == UNARY_NO_OVERWRITE) {
     Label slow_allocate_heapnumber, heapnumber_allocated;
+    __ mov(ebx, eax);
     __ AllocateHeapNumber(eax, edx, edi, &slow_allocate_heapnumber);
     __ jmp(&heapnumber_allocated);
 
     __ bind(&slow_allocate_heapnumber);
     __ EnterInternalFrame();
-    __ push(ecx);
+    // Push the original HeapNumber on the stack. The integer value can't
+    // be stored since it's untagged and not in the smi range (so we can't
+    // smi-tag it). We'll recalculate the value after the GC instead.
+    __ push(ebx);
     __ CallRuntime(Runtime::kNumberAlloc, 0);
-    __ pop(ecx);
+    // New HeapNumber is in eax.
+    __ pop(edx);
     __ LeaveInternalFrame();
+    // IntegerConvert uses ebx and edi as scratch registers.
+    // This conversion won't go slow-case.
+    IntegerConvert(masm, edx, CpuFeatures::IsSupported(SSE3), slow);
+    __ not_(ecx);
 
     __ bind(&heapnumber_allocated);
   }
   if (CpuFeatures::IsSupported(SSE2)) {
     CpuFeatures::Scope use_sse2(SSE2);
     __ cvtsi2sd(xmm0, Operand(ecx));
     __ movdbl(FieldOperand(eax, HeapNumber::kValueOffset), xmm0);
   } else {
     __ push(ecx);
     __ fild_s(Operand(esp, 0));
@@ skipping 3422 matching lines @@
   ExternalReference c_entry_fp(Isolate::k_c_entry_fp_address, masm->isolate());
   __ push(Operand::StaticVariable(c_entry_fp));
 
 #ifdef ENABLE_LOGGING_AND_PROFILING
   // If this is the outermost JS call, set js_entry_sp value.
   ExternalReference js_entry_sp(Isolate::k_js_entry_sp_address,
                                 masm->isolate());
   __ cmp(Operand::StaticVariable(js_entry_sp), Immediate(0));
   __ j(not_equal, &not_outermost_js);
   __ mov(Operand::StaticVariable(js_entry_sp), ebp);
+  __ push(Immediate(Smi::FromInt(StackFrame::OUTERMOST_JSENTRY_FRAME)));
+  Label cont;
+  __ jmp(&cont);
   __ bind(&not_outermost_js);
+  __ push(Immediate(Smi::FromInt(StackFrame::INNER_JSENTRY_FRAME)));
+  __ bind(&cont);
 #endif
 
   // Call a faked try-block that does the invoke.
   __ call(&invoke);
 
   // Caught exception: Store result (exception) in the pending
   // exception field in the JSEnv and return a failure sentinel.
   ExternalReference pending_exception(Isolate::k_pending_exception_address,
                                       masm->isolate());
   __ mov(Operand::StaticVariable(pending_exception), eax);
@@ skipping 25 matching lines @@
   } else {
     ExternalReference entry(Builtins::kJSEntryTrampoline,
                             masm->isolate());
     __ mov(edx, Immediate(entry));
   }
   __ mov(edx, Operand(edx, 0));  // deref address
   __ lea(edx, FieldOperand(edx, Code::kHeaderSize));
   __ call(Operand(edx));
 
   // Unlink this frame from the handler chain.
-  __ pop(Operand::StaticVariable(ExternalReference(
-      Isolate::k_handler_address,
-      masm->isolate())));
-  // Pop next_sp.
-  __ add(Operand(esp), Immediate(StackHandlerConstants::kSize - kPointerSize));
+  __ PopTryHandler();
 
+  __ bind(&exit);
 #ifdef ENABLE_LOGGING_AND_PROFILING
-  // If current EBP value is the same as js_entry_sp value, it means that
-  // the current function is the outermost.
-  __ cmp(ebp, Operand::StaticVariable(js_entry_sp));
+  // Check if the current stack frame is marked as the outermost JS frame.
+  __ pop(ebx);
+  __ cmp(Operand(ebx),
+         Immediate(Smi::FromInt(StackFrame::OUTERMOST_JSENTRY_FRAME)));
   __ j(not_equal, &not_outermost_js_2);
   __ mov(Operand::StaticVariable(js_entry_sp), Immediate(0));
   __ bind(&not_outermost_js_2);
 #endif
 
   // Restore the top frame descriptor from the stack.
-  __ bind(&exit);
   __ pop(Operand::StaticVariable(ExternalReference(
       Isolate::k_c_entry_fp_address,
       masm->isolate())));
 
   // Restore callee-saved registers (C calling conventions).
   __ pop(ebx);
   __ pop(esi);
   __ pop(edi);
   __ add(Operand(esp), Immediate(2 * kPointerSize));  // remove markers
 
@@ skipping 390 matching lines @@
 void StringCharCodeAtGenerator::GenerateSlow(
     MacroAssembler* masm, const RuntimeCallHelper& call_helper) {
   __ Abort("Unexpected fallthrough to CharCodeAt slow case");
 
   // Index is not a smi.
   __ bind(&index_not_smi_);
   // If index is a heap number, try converting it to an integer.
   __ CheckMap(index_,
               masm->isolate()->factory()->heap_number_map(),
               index_not_number_,
-              true);
+              DONT_DO_SMI_CHECK);
   call_helper.BeforeCall(masm);
   __ push(object_);
   __ push(index_);
   __ push(index_);  // Consumed by runtime conversion function.
   if (index_flags_ == STRING_INDEX_IS_NUMBER) {
     __ CallRuntime(Runtime::kNumberToIntegerMapMinusZero, 1);
   } else {
     ASSERT(index_flags_ == STRING_INDEX_IS_ARRAY_INDEX);
     // NumberToSmi discards numbers that are not exact integers.
     __ CallRuntime(Runtime::kNumberToSmi, 1);
@@ skipping 1466 matching lines @@
   __ Drop(1);
   __ ret(2 * kPointerSize);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32