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Unified Diff: src/ia32/code-stubs-ia32.cc

Issue 18712002: Convert UnaryOpStub to a HydrogenCodeStub (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: address review Created 7 years, 5 months ago
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Index: src/ia32/code-stubs-ia32.cc
diff --git a/src/ia32/code-stubs-ia32.cc b/src/ia32/code-stubs-ia32.cc
index 29a4be2140ffc629a81ab8d55b9a83a1d4a69536..b4a06b4eb1732facf0b409b50572c43fd43b5e38 100644
--- a/src/ia32/code-stubs-ia32.cc
+++ b/src/ia32/code-stubs-ia32.cc
@@ -230,6 +230,17 @@ void ToBooleanStub::InitializeInterfaceDescriptor(
}
+void UnaryOpStub::InitializeInterfaceDescriptor(
+ Isolate* isolate,
+ CodeStubInterfaceDescriptor* descriptor) {
+ static Register registers[] = { eax };
+ descriptor->register_param_count_ = 1;
+ descriptor->register_params_ = registers;
+ descriptor->deoptimization_handler_ =
+ FUNCTION_ADDR(UnaryOpIC_Miss);
+}
+
+
#define __ ACCESS_MASM(masm)
@@ -759,325 +770,6 @@ static void ConvertHeapNumberToInt32(MacroAssembler* masm,
}
-void UnaryOpStub::PrintName(StringStream* stream) {
- const char* op_name = Token::Name(op_);
- const char* overwrite_name = NULL; // Make g++ happy.
- switch (mode_) {
- case UNARY_NO_OVERWRITE: overwrite_name = "Alloc"; break;
- case UNARY_OVERWRITE: overwrite_name = "Overwrite"; break;
- }
- stream->Add("UnaryOpStub_%s_%s_%s",
- op_name,
- overwrite_name,
- UnaryOpIC::GetName(operand_type_));
-}
-
-
-// TODO(svenpanne): Use virtual functions instead of switch.
-void UnaryOpStub::Generate(MacroAssembler* masm) {
- switch (operand_type_) {
- case UnaryOpIC::UNINITIALIZED:
- GenerateTypeTransition(masm);
- break;
- case UnaryOpIC::SMI:
- GenerateSmiStub(masm);
- break;
- case UnaryOpIC::NUMBER:
- GenerateNumberStub(masm);
- break;
- case UnaryOpIC::GENERIC:
- GenerateGenericStub(masm);
- break;
- }
-}
-
-
-void UnaryOpStub::GenerateTypeTransition(MacroAssembler* masm) {
- __ pop(ecx); // Save return address.
-
- __ push(eax); // the operand
- __ push(Immediate(Smi::FromInt(op_)));
- __ push(Immediate(Smi::FromInt(mode_)));
- __ push(Immediate(Smi::FromInt(operand_type_)));
-
- __ push(ecx); // Push return address.
-
- // Patch the caller to an appropriate specialized stub and return the
- // operation result to the caller of the stub.
- __ TailCallExternalReference(
- ExternalReference(IC_Utility(IC::kUnaryOp_Patch), masm->isolate()), 4, 1);
-}
-
-
-// TODO(svenpanne): Use virtual functions instead of switch.
-void UnaryOpStub::GenerateSmiStub(MacroAssembler* masm) {
- switch (op_) {
- case Token::SUB:
- GenerateSmiStubSub(masm);
- break;
- case Token::BIT_NOT:
- GenerateSmiStubBitNot(masm);
- break;
- default:
- UNREACHABLE();
- }
-}
-
-
-void UnaryOpStub::GenerateSmiStubSub(MacroAssembler* masm) {
- Label non_smi, undo, slow;
- GenerateSmiCodeSub(masm, &non_smi, &undo, &slow,
- Label::kNear, Label::kNear, Label::kNear);
- __ bind(&undo);
- GenerateSmiCodeUndo(masm);
- __ bind(&non_smi);
- __ bind(&slow);
- GenerateTypeTransition(masm);
-}
-
-
-void UnaryOpStub::GenerateSmiStubBitNot(MacroAssembler* masm) {
- Label non_smi;
- GenerateSmiCodeBitNot(masm, &non_smi);
- __ bind(&non_smi);
- GenerateTypeTransition(masm);
-}
-
-
-void UnaryOpStub::GenerateSmiCodeSub(MacroAssembler* masm,
- Label* non_smi,
- Label* undo,
- Label* slow,
- Label::Distance non_smi_near,
- Label::Distance undo_near,
- Label::Distance slow_near) {
- // Check whether the value is a smi.
- __ JumpIfNotSmi(eax, non_smi, non_smi_near);
-
- // We can't handle -0 with smis, so use a type transition for that case.
- __ test(eax, eax);
- __ j(zero, slow, slow_near);
-
- // Try optimistic subtraction '0 - value', saving operand in eax for undo.
- __ mov(edx, eax);
- __ Set(eax, Immediate(0));
- __ sub(eax, edx);
- __ j(overflow, undo, undo_near);
- __ ret(0);
-}
-
-
-void UnaryOpStub::GenerateSmiCodeBitNot(
- MacroAssembler* masm,
- Label* non_smi,
- Label::Distance non_smi_near) {
- // Check whether the value is a smi.
- __ JumpIfNotSmi(eax, non_smi, non_smi_near);
-
- // Flip bits and revert inverted smi-tag.
- __ not_(eax);
- __ and_(eax, ~kSmiTagMask);
- __ ret(0);
-}
-
-
-void UnaryOpStub::GenerateSmiCodeUndo(MacroAssembler* masm) {
- __ mov(eax, edx);
-}
-
-
-// TODO(svenpanne): Use virtual functions instead of switch.
-void UnaryOpStub::GenerateNumberStub(MacroAssembler* masm) {
- switch (op_) {
- case Token::SUB:
- GenerateNumberStubSub(masm);
- break;
- case Token::BIT_NOT:
- GenerateNumberStubBitNot(masm);
- break;
- default:
- UNREACHABLE();
- }
-}
-
-
-void UnaryOpStub::GenerateNumberStubSub(MacroAssembler* masm) {
- Label non_smi, undo, slow, call_builtin;
- GenerateSmiCodeSub(masm, &non_smi, &undo, &call_builtin, Label::kNear);
- __ bind(&non_smi);
- GenerateHeapNumberCodeSub(masm, &slow);
- __ bind(&undo);
- GenerateSmiCodeUndo(masm);
- __ bind(&slow);
- GenerateTypeTransition(masm);
- __ bind(&call_builtin);
- GenerateGenericCodeFallback(masm);
-}
-
-
-void UnaryOpStub::GenerateNumberStubBitNot(
- MacroAssembler* masm) {
- Label non_smi, slow;
- GenerateSmiCodeBitNot(masm, &non_smi, Label::kNear);
- __ bind(&non_smi);
- GenerateHeapNumberCodeBitNot(masm, &slow);
- __ bind(&slow);
- GenerateTypeTransition(masm);
-}
-
-
-void UnaryOpStub::GenerateHeapNumberCodeSub(MacroAssembler* masm,
- Label* slow) {
- __ mov(edx, FieldOperand(eax, HeapObject::kMapOffset));
- __ cmp(edx, masm->isolate()->factory()->heap_number_map());
- __ j(not_equal, slow);
-
- if (mode_ == UNARY_OVERWRITE) {
- __ xor_(FieldOperand(eax, HeapNumber::kExponentOffset),
- Immediate(HeapNumber::kSignMask)); // Flip sign.
- } else {
- __ mov(edx, eax);
- // edx: operand
-
- Label slow_allocate_heapnumber, heapnumber_allocated;
- __ AllocateHeapNumber(eax, ebx, ecx, &slow_allocate_heapnumber);
- __ jmp(&heapnumber_allocated, Label::kNear);
-
- __ bind(&slow_allocate_heapnumber);
- {
- FrameScope scope(masm, StackFrame::INTERNAL);
- __ push(edx);
- __ CallRuntime(Runtime::kNumberAlloc, 0);
- __ pop(edx);
- }
-
- __ bind(&heapnumber_allocated);
- // eax: allocated 'empty' number
- __ mov(ecx, FieldOperand(edx, HeapNumber::kExponentOffset));
- __ xor_(ecx, HeapNumber::kSignMask); // Flip sign.
- __ mov(FieldOperand(eax, HeapNumber::kExponentOffset), ecx);
- __ mov(ecx, FieldOperand(edx, HeapNumber::kMantissaOffset));
- __ mov(FieldOperand(eax, HeapNumber::kMantissaOffset), ecx);
- }
- __ ret(0);
-}
-
-
-void UnaryOpStub::GenerateHeapNumberCodeBitNot(MacroAssembler* masm,
- Label* slow) {
- __ mov(edx, FieldOperand(eax, HeapObject::kMapOffset));
- __ cmp(edx, masm->isolate()->factory()->heap_number_map());
- __ j(not_equal, slow);
-
- // Convert the heap number in eax to an untagged integer in ecx.
- IntegerConvert(masm, eax, CpuFeatures::IsSupported(SSE3), slow);
-
- // Do the bitwise operation and check if the result fits in a smi.
- Label try_float;
- __ not_(ecx);
- __ cmp(ecx, 0xc0000000);
- __ j(sign, &try_float, Label::kNear);
-
- // 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);
- {
- FrameScope scope(masm, StackFrame::INTERNAL);
- // 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);
- // New HeapNumber is in eax.
- __ pop(edx);
- }
- // 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)) {
- CpuFeatureScope use_sse2(masm, SSE2);
- __ cvtsi2sd(xmm0, ecx);
- __ movdbl(FieldOperand(eax, HeapNumber::kValueOffset), xmm0);
- } else {
- __ push(ecx);
- __ fild_s(Operand(esp, 0));
- __ pop(ecx);
- __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset));
- }
- __ ret(0);
-}
-
-
-// TODO(svenpanne): Use virtual functions instead of switch.
-void UnaryOpStub::GenerateGenericStub(MacroAssembler* masm) {
- switch (op_) {
- case Token::SUB:
- GenerateGenericStubSub(masm);
- break;
- case Token::BIT_NOT:
- GenerateGenericStubBitNot(masm);
- break;
- default:
- UNREACHABLE();
- }
-}
-
-
-void UnaryOpStub::GenerateGenericStubSub(MacroAssembler* masm) {
- Label non_smi, undo, slow;
- GenerateSmiCodeSub(masm, &non_smi, &undo, &slow, Label::kNear);
- __ bind(&non_smi);
- GenerateHeapNumberCodeSub(masm, &slow);
- __ bind(&undo);
- GenerateSmiCodeUndo(masm);
- __ bind(&slow);
- GenerateGenericCodeFallback(masm);
-}
-
-
-void UnaryOpStub::GenerateGenericStubBitNot(MacroAssembler* masm) {
- Label non_smi, slow;
- GenerateSmiCodeBitNot(masm, &non_smi, Label::kNear);
- __ bind(&non_smi);
- GenerateHeapNumberCodeBitNot(masm, &slow);
- __ bind(&slow);
- GenerateGenericCodeFallback(masm);
-}
-
-
-void UnaryOpStub::GenerateGenericCodeFallback(MacroAssembler* masm) {
- // Handle the slow case by jumping to the corresponding JavaScript builtin.
- __ pop(ecx); // pop return address.
- __ push(eax);
- __ push(ecx); // push return address
- switch (op_) {
- case Token::SUB:
- __ InvokeBuiltin(Builtins::UNARY_MINUS, JUMP_FUNCTION);
- break;
- case Token::BIT_NOT:
- __ InvokeBuiltin(Builtins::BIT_NOT, JUMP_FUNCTION);
- break;
- default:
- UNREACHABLE();
- }
-}
-
-
void BinaryOpStub::Initialize() {
platform_specific_bit_ = CpuFeatures::IsSupported(SSE3);
}
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