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Unified Diff: src/ia32/ic-ia32.cc

Issue 601080: Change KeyedLoadIC interface on ia32 to take receiver and name in registers. (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/
Patch Set: '' Created 10 years, 10 months ago
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Index: src/ia32/ic-ia32.cc
===================================================================
--- src/ia32/ic-ia32.cc (revision 3894)
+++ src/ia32/ic-ia32.cc (working copy)
@@ -219,26 +219,22 @@
void KeyedLoadIC::GenerateGeneric(MacroAssembler* masm) {
// ----------- S t a t e -------------
+ // -- eax : key
+ // -- edx : receiver
// -- esp[0] : return address
- // -- esp[4] : name
- // -- esp[8] : receiver
// -----------------------------------
Label slow, check_string, index_int, index_string;
Label check_pixel_array, probe_dictionary;
- // Load name and receiver.
- __ mov(eax, Operand(esp, kPointerSize));
- __ mov(ecx, Operand(esp, 2 * kPointerSize));
-
// Check that the object isn't a smi.
- __ test(ecx, Immediate(kSmiTagMask));
+ __ test(edx, Immediate(kSmiTagMask));
__ j(zero, &slow, not_taken);
// Get the map of the receiver.
- __ mov(edx, FieldOperand(ecx, HeapObject::kMapOffset));
+ __ mov(ecx, FieldOperand(edx, HeapObject::kMapOffset));
// Check bit field.
- __ movzx_b(ebx, FieldOperand(edx, Map::kBitFieldOffset));
+ __ movzx_b(ebx, FieldOperand(ecx, Map::kBitFieldOffset));
__ test(ebx, Immediate(kSlowCaseBitFieldMask));
__ j(not_zero, &slow, not_taken);
// Check that the object is some kind of JS object EXCEPT JS Value type.
@@ -246,56 +242,58 @@
// we enter the runtime system to make sure that indexing
// into string objects work as intended.
ASSERT(JS_OBJECT_TYPE > JS_VALUE_TYPE);
- __ movzx_b(edx, FieldOperand(edx, Map::kInstanceTypeOffset));
- __ cmp(edx, JS_OBJECT_TYPE);
- __ j(less, &slow, not_taken);
+ __ CmpInstanceType(ecx, JS_OBJECT_TYPE);
+ __ j(below, &slow, not_taken);
// Check that the key is a smi.
__ test(eax, Immediate(kSmiTagMask));
__ j(not_zero, &check_string, not_taken);
- __ sar(eax, kSmiTagSize);
+ __ mov(ebx, eax);
+ __ SmiUntag(ebx);
// Get the elements array of the object.
__ bind(&index_int);
- __ mov(ecx, FieldOperand(ecx, JSObject::kElementsOffset));
+ __ mov(ecx, FieldOperand(edx, JSObject::kElementsOffset));
// Check that the object is in fast mode (not dictionary).
- __ cmp(FieldOperand(ecx, HeapObject::kMapOffset),
- Immediate(Factory::fixed_array_map()));
- __ j(not_equal, &check_pixel_array);
+ __ CheckMap(ecx, Factory::fixed_array_map(), &check_pixel_array, true);
// Check that the key (index) is within bounds.
- __ cmp(eax, FieldOperand(ecx, FixedArray::kLengthOffset));
+ __ cmp(ebx, FieldOperand(ecx, FixedArray::kLengthOffset));
__ j(above_equal, &slow);
// Fast case: Do the load.
- __ mov(eax,
- Operand(ecx, eax, times_4, FixedArray::kHeaderSize - kHeapObjectTag));
- __ cmp(Operand(eax), Immediate(Factory::the_hole_value()));
+ __ mov(ecx, FieldOperand(ecx, ebx, times_4, FixedArray::kHeaderSize));
+ __ cmp(Operand(ecx), Immediate(Factory::the_hole_value()));
// In case the loaded value is the_hole we have to consult GetProperty
// to ensure the prototype chain is searched.
__ j(equal, &slow);
+ __ mov(eax, ecx);
__ IncrementCounter(&Counters::keyed_load_generic_smi, 1);
__ ret(0);
- // Check whether the elements is a pixel array.
- // eax: untagged index
- // ecx: elements array
__ bind(&check_pixel_array);
- __ cmp(FieldOperand(ecx, HeapObject::kMapOffset),
- Immediate(Factory::pixel_array_map()));
- __ j(not_equal, &slow);
- __ cmp(eax, FieldOperand(ecx, PixelArray::kLengthOffset));
+ // Check whether the elements is a pixel array.
+ // edx: receiver
+ // ebx: untagged index
+ // eax: key
+ // ecx: elements
+ __ CheckMap(ecx, Factory::pixel_array_map(), &slow, true);
+ __ cmp(ebx, FieldOperand(ecx, PixelArray::kLengthOffset));
__ j(above_equal, &slow);
- __ mov(ecx, FieldOperand(ecx, PixelArray::kExternalPointerOffset));
- __ movzx_b(eax, Operand(ecx, eax, times_1, 0));
- __ shl(eax, kSmiTagSize);
+ __ mov(eax, FieldOperand(ecx, PixelArray::kExternalPointerOffset));
+ __ movzx_b(eax, Operand(eax, ebx, times_1, 0));
+ __ SmiTag(eax);
__ ret(0);
- // Slow case: Load name and receiver from stack and jump to runtime.
__ bind(&slow);
+ // Slow case: jump to runtime.
+ // edx: receiver
+ // eax: key
__ IncrementCounter(&Counters::keyed_load_generic_slow, 1);
GenerateRuntimeGetProperty(masm);
__ bind(&check_string);
// The key is not a smi.
// Is it a string?
- __ CmpObjectType(eax, FIRST_NONSTRING_TYPE, edx);
+ // edx: receiver
+ // eax: key
+ __ CmpObjectType(eax, FIRST_NONSTRING_TYPE, ecx);
__ j(above_equal, &slow);
// Is the string an array index, with cached numeric value?
__ mov(ebx, FieldOperand(eax, String::kHashFieldOffset));
@@ -303,55 +301,58 @@
__ j(not_zero, &index_string, not_taken);
// Is the string a symbol?
- __ movzx_b(ebx, FieldOperand(edx, Map::kInstanceTypeOffset));
+ __ movzx_b(ebx, FieldOperand(ecx, Map::kInstanceTypeOffset));
ASSERT(kSymbolTag != 0);
__ test(ebx, Immediate(kIsSymbolMask));
__ j(zero, &slow, not_taken);
// If the receiver is a fast-case object, check the keyed lookup
- // cache. Otherwise probe the dictionary leaving result in ecx.
- __ mov(ebx, FieldOperand(ecx, JSObject::kPropertiesOffset));
+ // cache. Otherwise probe the dictionary.
+ __ mov(ebx, FieldOperand(edx, JSObject::kPropertiesOffset));
__ cmp(FieldOperand(ebx, HeapObject::kMapOffset),
Immediate(Factory::hash_table_map()));
__ j(equal, &probe_dictionary);
// Load the map of the receiver, compute the keyed lookup cache hash
// based on 32 bits of the map pointer and the string hash.
- __ mov(ebx, FieldOperand(ecx, HeapObject::kMapOffset));
- __ mov(edx, ebx);
- __ shr(edx, KeyedLookupCache::kMapHashShift);
- __ mov(eax, FieldOperand(eax, String::kHashFieldOffset));
- __ shr(eax, String::kHashShift);
- __ xor_(edx, Operand(eax));
- __ and_(edx, KeyedLookupCache::kCapacityMask);
+ __ mov(ebx, FieldOperand(edx, HeapObject::kMapOffset));
+ __ mov(ecx, ebx);
+ __ shr(ecx, KeyedLookupCache::kMapHashShift);
+ __ mov(edi, FieldOperand(eax, String::kHashFieldOffset));
+ __ shr(edi, String::kHashShift);
+ __ xor_(ecx, Operand(edi));
+ __ and_(ecx, KeyedLookupCache::kCapacityMask);
// Load the key (consisting of map and symbol) from the cache and
// check for match.
ExternalReference cache_keys
= ExternalReference::keyed_lookup_cache_keys();
- __ mov(edi, edx);
+ __ mov(edi, ecx);
__ shl(edi, kPointerSizeLog2 + 1);
__ cmp(ebx, Operand::StaticArray(edi, times_1, cache_keys));
__ j(not_equal, &slow);
__ add(Operand(edi), Immediate(kPointerSize));
- __ mov(edi, Operand::StaticArray(edi, times_1, cache_keys));
- __ cmp(edi, Operand(esp, kPointerSize));
+ __ cmp(eax, Operand::StaticArray(edi, times_1, cache_keys));
__ j(not_equal, &slow);
// Get field offset and check that it is an in-object property.
+ // edx : receiver
+ // ebx : receiver's map
+ // eax : key
+ // ecx : lookup cache index
ExternalReference cache_field_offsets
= ExternalReference::keyed_lookup_cache_field_offsets();
- __ mov(eax,
- Operand::StaticArray(edx, times_pointer_size, cache_field_offsets));
- __ movzx_b(edx, FieldOperand(ebx, Map::kInObjectPropertiesOffset));
- __ cmp(eax, Operand(edx));
+ __ mov(edi,
+ Operand::StaticArray(ecx, times_pointer_size, cache_field_offsets));
+ __ movzx_b(ecx, FieldOperand(ebx, Map::kInObjectPropertiesOffset));
+ __ cmp(edi, Operand(ecx));
__ j(above_equal, &slow);
// Load in-object property.
- __ sub(eax, Operand(edx));
- __ movzx_b(edx, FieldOperand(ebx, Map::kInstanceSizeOffset));
- __ add(eax, Operand(edx));
- __ mov(eax, FieldOperand(ecx, eax, times_pointer_size, 0));
+ __ sub(edi, Operand(ecx));
+ __ movzx_b(ecx, FieldOperand(ebx, Map::kInstanceSizeOffset));
+ __ add(ecx, Operand(edi));
+ __ mov(eax, FieldOperand(edx, ecx, times_pointer_size, 0));
__ ret(0);
// Do a quick inline probe of the receiver's dictionary, if it
@@ -359,14 +360,14 @@
__ bind(&probe_dictionary);
GenerateDictionaryLoad(masm,
&slow,
- ecx,
+ edx,
eax,
ebx,
- edx,
+ ecx,
edi,
DICTIONARY_CHECK_DONE);
- GenerateCheckNonObjectOrLoaded(masm, &slow, edx, ebx);
- __ mov(eax, Operand(edx));
+ GenerateCheckNonObjectOrLoaded(masm, &slow, ecx, ebx);
+ __ mov(eax, ecx);
__ IncrementCounter(&Counters::keyed_load_generic_symbol, 1);
__ ret(0);
@@ -377,51 +378,47 @@
ASSERT(TenToThe(String::kMaxCachedArrayIndexLength) <
(1 << String::kArrayIndexValueBits));
__ bind(&index_string);
- __ mov(eax, Operand(ebx));
- __ and_(eax, String::kArrayIndexHashMask);
- __ shr(eax, String::kHashShift);
+ __ and_(ebx, String::kArrayIndexHashMask);
+ __ shr(ebx, String::kHashShift);
__ jmp(&index_int);
}
void KeyedLoadIC::GenerateString(MacroAssembler* masm) {
// ----------- S t a t e -------------
+ // -- eax : key
+ // -- edx : receiver
// -- esp[0] : return address
- // -- esp[4] : key
- // -- esp[8] : receiver
// -----------------------------------
Label miss, index_ok;
// Pop return address.
// Performing the load early is better in the common case.
- __ pop(eax);
+ __ pop(ebx);
- __ mov(ebx, Operand(esp, 1 * kPointerSize));
- __ test(ebx, Immediate(kSmiTagMask));
+ __ test(edx, Immediate(kSmiTagMask));
__ j(zero, &miss);
- __ mov(ecx, FieldOperand(ebx, HeapObject::kMapOffset));
+ __ mov(ecx, FieldOperand(edx, HeapObject::kMapOffset));
__ movzx_b(ecx, FieldOperand(ecx, Map::kInstanceTypeOffset));
__ test(ecx, Immediate(kIsNotStringMask));
__ j(not_zero, &miss);
// Check if key is a smi or a heap number.
- __ mov(edx, Operand(esp, 0));
- __ test(edx, Immediate(kSmiTagMask));
+ __ test(eax, Immediate(kSmiTagMask));
__ j(zero, &index_ok);
- __ mov(ecx, FieldOperand(ebx, HeapObject::kMapOffset));
+ __ mov(ecx, FieldOperand(eax, HeapObject::kMapOffset));
__ cmp(ecx, Factory::heap_number_map());
__ j(not_equal, &miss);
__ bind(&index_ok);
- // Duplicate receiver and key since they are expected on the stack after
- // the KeyedLoadIC call.
- __ push(ebx); // receiver
- __ push(edx); // key
- __ push(eax); // return address
+ // Push receiver and key on the stack, and make a tail call.
+ __ push(edx); // receiver
+ __ push(eax); // key
+ __ push(ebx); // return address
__ InvokeBuiltin(Builtins::STRING_CHAR_AT, JUMP_FUNCTION);
__ bind(&miss);
- __ push(eax);
+ __ push(ebx);
GenerateMiss(masm);
}
@@ -429,18 +426,14 @@
void KeyedLoadIC::GenerateExternalArray(MacroAssembler* masm,
ExternalArrayType array_type) {
// ----------- S t a t e -------------
+ // -- eax : key
+ // -- edx : receiver
// -- esp[0] : return address
- // -- esp[4] : key
- // -- esp[8] : receiver
// -----------------------------------
Label slow, failed_allocation;
- // Load name and receiver.
- __ mov(eax, Operand(esp, kPointerSize));
- __ mov(ecx, Operand(esp, 2 * kPointerSize));
-
// Check that the object isn't a smi.
- __ test(ecx, Immediate(kSmiTagMask));
+ __ test(edx, Immediate(kSmiTagMask));
__ j(zero, &slow, not_taken);
// Check that the key is a smi.
@@ -448,59 +441,56 @@
__ j(not_zero, &slow, not_taken);
// Get the map of the receiver.
- __ mov(edx, FieldOperand(ecx, HeapObject::kMapOffset));
+ __ mov(ecx, FieldOperand(edx, HeapObject::kMapOffset));
// Check that the receiver does not require access checks. We need
// to check this explicitly since this generic stub does not perform
// map checks.
- __ movzx_b(ebx, FieldOperand(edx, Map::kBitFieldOffset));
+ __ movzx_b(ebx, FieldOperand(ecx, Map::kBitFieldOffset));
__ test(ebx, Immediate(1 << Map::kIsAccessCheckNeeded));
__ j(not_zero, &slow, not_taken);
- // Get the instance type from the map of the receiver.
- __ movzx_b(edx, FieldOperand(edx, Map::kInstanceTypeOffset));
- // Check that the object is a JS object.
- __ cmp(edx, JS_OBJECT_TYPE);
+ __ CmpInstanceType(ecx, JS_OBJECT_TYPE);
__ j(not_equal, &slow, not_taken);
// Check that the elements array is the appropriate type of
// ExternalArray.
- // eax: index (as a smi)
- // ecx: JSObject
- __ mov(ecx, FieldOperand(ecx, JSObject::kElementsOffset));
+ __ mov(ebx, FieldOperand(edx, JSObject::kElementsOffset));
Handle<Map> map(Heap::MapForExternalArrayType(array_type));
- __ cmp(FieldOperand(ecx, HeapObject::kMapOffset),
+ __ cmp(FieldOperand(ebx, HeapObject::kMapOffset),
Immediate(map));
__ j(not_equal, &slow, not_taken);
+ // eax: key, known to be a smi.
+ // edx: receiver, known to be a JSObject.
+ // ebx: elements object, known to be an external array.
// Check that the index is in range.
- __ sar(eax, kSmiTagSize); // Untag the index.
- __ cmp(eax, FieldOperand(ecx, ExternalArray::kLengthOffset));
+ __ mov(ecx, eax);
+ __ SmiUntag(ecx); // Untag the index.
+ __ cmp(ecx, FieldOperand(ebx, ExternalArray::kLengthOffset));
// Unsigned comparison catches both negative and too-large values.
__ j(above_equal, &slow);
- // eax: untagged index
- // ecx: elements array
- __ mov(ecx, FieldOperand(ecx, ExternalArray::kExternalPointerOffset));
- // ecx: base pointer of external storage
+ __ mov(ebx, FieldOperand(ebx, ExternalArray::kExternalPointerOffset));
+ // ebx: base pointer of external storage
switch (array_type) {
case kExternalByteArray:
- __ movsx_b(eax, Operand(ecx, eax, times_1, 0));
+ __ movsx_b(ecx, Operand(ebx, ecx, times_1, 0));
break;
case kExternalUnsignedByteArray:
- __ movzx_b(eax, Operand(ecx, eax, times_1, 0));
+ __ movzx_b(ecx, Operand(ebx, ecx, times_1, 0));
break;
case kExternalShortArray:
- __ movsx_w(eax, Operand(ecx, eax, times_2, 0));
+ __ movsx_w(ecx, Operand(ebx, ecx, times_2, 0));
break;
case kExternalUnsignedShortArray:
- __ movzx_w(eax, Operand(ecx, eax, times_2, 0));
+ __ movzx_w(ecx, Operand(ebx, ecx, times_2, 0));
break;
case kExternalIntArray:
case kExternalUnsignedIntArray:
- __ mov(eax, Operand(ecx, eax, times_4, 0));
+ __ mov(ecx, Operand(ebx, ecx, times_4, 0));
break;
case kExternalFloatArray:
- __ fld_s(Operand(ecx, eax, times_4, 0));
+ __ fld_s(Operand(ebx, ecx, times_4, 0));
break;
default:
UNREACHABLE();
@@ -508,7 +498,7 @@
}
// For integer array types:
- // eax: value
+ // ecx: value
// For floating-point array type:
// FP(0): value
@@ -519,21 +509,19 @@
// it to a HeapNumber.
Label box_int;
if (array_type == kExternalIntArray) {
- // See Smi::IsValid for why this works.
- __ mov(ebx, eax);
- __ add(Operand(ebx), Immediate(0x40000000));
- __ cmp(ebx, 0x80000000);
- __ j(above_equal, &box_int);
+ __ cmp(ecx, 0xC0000000);
+ __ j(sign, &box_int);
} else {
ASSERT_EQ(array_type, kExternalUnsignedIntArray);
// The test is different for unsigned int values. Since we need
- // the Smi-encoded result to be treated as unsigned, we can't
+ // the value to be in the range of a positive smi, we can't
// handle either of the top two bits being set in the value.
- __ test(eax, Immediate(0xC0000000));
+ __ test(ecx, Immediate(0xC0000000));
__ j(not_zero, &box_int);
}
- __ shl(eax, kSmiTagSize);
+ __ mov(eax, ecx);
+ __ SmiTag(eax);
__ ret(0);
__ bind(&box_int);
@@ -541,34 +529,37 @@
// Allocate a HeapNumber for the int and perform int-to-double
// conversion.
if (array_type == kExternalIntArray) {
- __ push(eax);
+ __ push(ecx);
__ fild_s(Operand(esp, 0));
- __ pop(eax);
+ __ pop(ecx);
} else {
ASSERT(array_type == kExternalUnsignedIntArray);
// Need to zero-extend the value.
// There's no fild variant for unsigned values, so zero-extend
// to a 64-bit int manually.
__ push(Immediate(0));
- __ push(eax);
+ __ push(ecx);
__ fild_d(Operand(esp, 0));
- __ pop(eax);
- __ pop(eax);
+ __ pop(ecx);
+ __ pop(ecx);
}
// FP(0): value
- __ AllocateHeapNumber(eax, ebx, ecx, &failed_allocation);
+ __ AllocateHeapNumber(ecx, ebx, edi, &failed_allocation);
// Set the value.
+ __ mov(eax, ecx);
__ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset));
__ ret(0);
} else if (array_type == kExternalFloatArray) {
// For the floating-point array type, we need to always allocate a
// HeapNumber.
- __ AllocateHeapNumber(eax, ebx, ecx, &failed_allocation);
+ __ AllocateHeapNumber(ecx, ebx, edi, &failed_allocation);
// Set the value.
+ __ mov(eax, ecx);
__ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset));
__ ret(0);
} else {
- __ shl(eax, kSmiTagSize);
+ __ mov(eax, ecx);
+ __ SmiTag(eax);
__ ret(0);
}
@@ -579,7 +570,7 @@
__ fincstp();
// Fall through to slow case.
- // Slow case: Load name and receiver from stack and jump to runtime.
+ // Slow case: Load key and receiver from stack and jump to runtime.
__ bind(&slow);
__ IncrementCounter(&Counters::keyed_load_external_array_slow, 1);
GenerateRuntimeGetProperty(masm);
@@ -588,19 +579,14 @@
void KeyedLoadIC::GenerateIndexedInterceptor(MacroAssembler* masm) {
// ----------- S t a t e -------------
- // -- eax : value
+ // -- eax : key
+ // -- edx : receiver
// -- esp[0] : return address
- // -- esp[4] : key
- // -- esp[8] : receiver
// -----------------------------------
Label slow;
- // Load key and receiver.
- __ mov(eax, Operand(esp, kPointerSize));
- __ mov(ecx, Operand(esp, 2 * kPointerSize));
-
// Check that the receiver isn't a smi.
- __ test(ecx, Immediate(kSmiTagMask));
+ __ test(edx, Immediate(kSmiTagMask));
__ j(zero, &slow, not_taken);
// Check that the key is a smi.
@@ -608,20 +594,20 @@
__ j(not_zero, &slow, not_taken);
// Get the map of the receiver.
- __ mov(edx, FieldOperand(ecx, HeapObject::kMapOffset));
+ __ mov(ecx, FieldOperand(edx, HeapObject::kMapOffset));
// Check that it has indexed interceptor and access checks
// are not enabled for this object.
- __ movzx_b(edx, FieldOperand(edx, Map::kBitFieldOffset));
- __ and_(Operand(edx), Immediate(kSlowCaseBitFieldMask));
- __ cmp(Operand(edx), Immediate(1 << Map::kHasIndexedInterceptor));
+ __ movzx_b(ecx, FieldOperand(ecx, Map::kBitFieldOffset));
+ __ and_(Operand(ecx), Immediate(kSlowCaseBitFieldMask));
+ __ cmp(Operand(ecx), Immediate(1 << Map::kHasIndexedInterceptor));
__ j(not_zero, &slow, not_taken);
// Everything is fine, call runtime.
- __ pop(edx);
- __ push(ecx); // receiver
+ __ pop(ecx);
+ __ push(edx); // receiver
__ push(eax); // key
- __ push(edx); // return address
+ __ push(ecx); // return address
// Perform tail call to the entry.
__ TailCallRuntime(ExternalReference(
@@ -1380,14 +1366,14 @@
void KeyedLoadIC::GenerateMiss(MacroAssembler* masm) {
// ----------- S t a t e -------------
+ // -- eax : key
+ // -- edx : receiver
// -- esp[0] : return address
- // -- esp[4] : name
- // -- esp[8] : receiver
// -----------------------------------
__ pop(ebx);
- __ push(Operand(esp, kPointerSize)); // receiver
- __ push(Operand(esp, kPointerSize)); // name
+ __ push(edx); // receiver
+ __ push(eax); // name
__ push(ebx); // return address
// Perform tail call to the entry.
@@ -1397,14 +1383,14 @@
void KeyedLoadIC::GenerateRuntimeGetProperty(MacroAssembler* masm) {
// ----------- S t a t e -------------
+ // -- eax : key
+ // -- edx : receiver
// -- esp[0] : return address
- // -- esp[4] : name
- // -- esp[8] : receiver
// -----------------------------------
__ pop(ebx);
- __ push(Operand(esp, 1 * kPointerSize)); // receiver
- __ push(Operand(esp, 1 * kPointerSize)); // name
+ __ push(edx); // receiver
+ __ push(eax); // name
__ push(ebx); // return address
// Perform tail call to the entry.
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