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Unified Diff: src/mips/stub-cache-mips.cc

Issue 22815014: MIPS: Remove platform-specific dead code for KeyedStores (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 7 years, 4 months ago
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Index: src/mips/stub-cache-mips.cc
diff --git a/src/mips/stub-cache-mips.cc b/src/mips/stub-cache-mips.cc
index c4b1ee57a7239ebb9cb73033fd5b1bbcbbe2b916..b84aca74437b424c7b14d6342d391a0665cde8ec 100644
--- a/src/mips/stub-cache-mips.cc
+++ b/src/mips/stub-cache-mips.cc
@@ -1156,22 +1156,6 @@ static void GenerateCheckPropertyCells(MacroAssembler* masm,
}
-// Convert and store int passed in register ival to IEEE 754 single precision
-// floating point value at memory location (dst + 4 * wordoffset)
-// If FPU is available use it for conversion.
-static void StoreIntAsFloat(MacroAssembler* masm,
- Register dst,
- Register wordoffset,
- Register ival,
- Register scratch1) {
- __ mtc1(ival, f0);
- __ cvt_s_w(f0, f0);
- __ sll(scratch1, wordoffset, 2);
- __ addu(scratch1, dst, scratch1);
- __ swc1(f0, MemOperand(scratch1, 0));
-}
-
-
void StubCompiler::GenerateTailCall(MacroAssembler* masm, Handle<Code> code) {
__ Jump(code, RelocInfo::CODE_TARGET);
}
@@ -3229,570 +3213,6 @@ void KeyedLoadStubCompiler::GenerateLoadDictionaryElement(
}
-static void GenerateSmiKeyCheck(MacroAssembler* masm,
- Register key,
- Register scratch0,
- Register scratch1,
- FPURegister double_scratch0,
- FPURegister double_scratch1,
- Label* fail) {
- Label key_ok;
- // Check for smi or a smi inside a heap number. We convert the heap
- // number and check if the conversion is exact and fits into the smi
- // range.
- __ JumpIfSmi(key, &key_ok);
- __ CheckMap(key,
- scratch0,
- Heap::kHeapNumberMapRootIndex,
- fail,
- DONT_DO_SMI_CHECK);
- __ ldc1(double_scratch0, FieldMemOperand(key, HeapNumber::kValueOffset));
- __ EmitFPUTruncate(kRoundToZero,
- scratch0,
- double_scratch0,
- at,
- double_scratch1,
- scratch1,
- kCheckForInexactConversion);
-
- __ Branch(fail, ne, scratch1, Operand(zero_reg));
-
- __ SmiTagCheckOverflow(key, scratch0, scratch1);
- __ BranchOnOverflow(fail, scratch1);
- __ bind(&key_ok);
-}
-
-
-void KeyedStoreStubCompiler::GenerateStoreExternalArray(
- MacroAssembler* masm,
- ElementsKind elements_kind) {
- // ---------- S t a t e --------------
- // -- a0 : value
- // -- a1 : key
- // -- a2 : receiver
- // -- ra : return address
- // -----------------------------------
-
- Label slow, check_heap_number, miss_force_generic;
-
- // Register usage.
- Register value = a0;
- Register key = a1;
- Register receiver = a2;
- // a3 mostly holds the elements array or the destination external array.
-
- // This stub is meant to be tail-jumped to, the receiver must already
- // have been verified by the caller to not be a smi.
-
- // Check that the key is a smi or a heap number convertible to a smi.
- GenerateSmiKeyCheck(masm, key, t0, t1, f2, f4, &miss_force_generic);
-
- __ lw(a3, FieldMemOperand(receiver, JSObject::kElementsOffset));
-
- // Check that the index is in range.
- __ lw(t1, FieldMemOperand(a3, ExternalArray::kLengthOffset));
- // Unsigned comparison catches both negative and too-large values.
- __ Branch(&miss_force_generic, Ugreater_equal, key, Operand(t1));
-
- // Handle both smis and HeapNumbers in the fast path. Go to the
- // runtime for all other kinds of values.
- // a3: external array.
-
- if (elements_kind == EXTERNAL_PIXEL_ELEMENTS) {
- // Double to pixel conversion is only implemented in the runtime for now.
- __ JumpIfNotSmi(value, &slow);
- } else {
- __ JumpIfNotSmi(value, &check_heap_number);
- }
- __ SmiUntag(t1, value);
- __ lw(a3, FieldMemOperand(a3, ExternalArray::kExternalPointerOffset));
-
- // a3: base pointer of external storage.
- // t1: value (integer).
-
- switch (elements_kind) {
- case EXTERNAL_PIXEL_ELEMENTS: {
- // Clamp the value to [0..255].
- // v0 is used as a scratch register here.
- Label done;
- __ li(v0, Operand(255));
- // Normal branch: nop in delay slot.
- __ Branch(&done, gt, t1, Operand(v0));
- // Use delay slot in this branch.
- __ Branch(USE_DELAY_SLOT, &done, lt, t1, Operand(zero_reg));
- __ mov(v0, zero_reg); // In delay slot.
- __ mov(v0, t1); // Value is in range 0..255.
- __ bind(&done);
- __ mov(t1, v0);
-
- __ srl(t8, key, 1);
- __ addu(t8, a3, t8);
- __ sb(t1, MemOperand(t8, 0));
- }
- break;
- case EXTERNAL_BYTE_ELEMENTS:
- case EXTERNAL_UNSIGNED_BYTE_ELEMENTS:
- __ srl(t8, key, 1);
- __ addu(t8, a3, t8);
- __ sb(t1, MemOperand(t8, 0));
- break;
- case EXTERNAL_SHORT_ELEMENTS:
- case EXTERNAL_UNSIGNED_SHORT_ELEMENTS:
- __ addu(t8, a3, key);
- __ sh(t1, MemOperand(t8, 0));
- break;
- case EXTERNAL_INT_ELEMENTS:
- case EXTERNAL_UNSIGNED_INT_ELEMENTS:
- __ sll(t8, key, 1);
- __ addu(t8, a3, t8);
- __ sw(t1, MemOperand(t8, 0));
- break;
- case EXTERNAL_FLOAT_ELEMENTS:
- // Perform int-to-float conversion and store to memory.
- __ SmiUntag(t0, key);
- StoreIntAsFloat(masm, a3, t0, t1, t2);
- break;
- case EXTERNAL_DOUBLE_ELEMENTS:
- __ sll(t8, key, 2);
- __ addu(a3, a3, t8);
- // a3: effective address of the double element
- FloatingPointHelper::Destination destination;
- destination = FloatingPointHelper::kFPURegisters;
- FloatingPointHelper::ConvertIntToDouble(
- masm, t1, destination,
- f0, t2, t3, // These are: double_dst, dst_mantissa, dst_exponent.
- t0, f2); // These are: scratch2, single_scratch.
- __ sdc1(f0, MemOperand(a3, 0));
- break;
- case FAST_ELEMENTS:
- case FAST_SMI_ELEMENTS:
- case FAST_DOUBLE_ELEMENTS:
- case FAST_HOLEY_ELEMENTS:
- case FAST_HOLEY_SMI_ELEMENTS:
- case FAST_HOLEY_DOUBLE_ELEMENTS:
- case DICTIONARY_ELEMENTS:
- case NON_STRICT_ARGUMENTS_ELEMENTS:
- UNREACHABLE();
- break;
- }
-
- // Entry registers are intact, a0 holds the value which is the return value.
- __ Ret(USE_DELAY_SLOT);
- __ mov(v0, a0);
-
- if (elements_kind != EXTERNAL_PIXEL_ELEMENTS) {
- // a3: external array.
- __ bind(&check_heap_number);
- __ GetObjectType(value, t1, t2);
- __ Branch(&slow, ne, t2, Operand(HEAP_NUMBER_TYPE));
-
- __ lw(a3, FieldMemOperand(a3, ExternalArray::kExternalPointerOffset));
-
- // a3: base pointer of external storage.
-
- // The WebGL specification leaves the behavior of storing NaN and
- // +/-Infinity into integer arrays basically undefined. For more
- // reproducible behavior, convert these to zero.
-
-
- __ ldc1(f0, FieldMemOperand(a0, HeapNumber::kValueOffset));
-
- if (elements_kind == EXTERNAL_FLOAT_ELEMENTS) {
- __ cvt_s_d(f0, f0);
- __ sll(t8, key, 1);
- __ addu(t8, a3, t8);
- __ swc1(f0, MemOperand(t8, 0));
- } else if (elements_kind == EXTERNAL_DOUBLE_ELEMENTS) {
- __ sll(t8, key, 2);
- __ addu(t8, a3, t8);
- __ sdc1(f0, MemOperand(t8, 0));
- } else {
- __ EmitECMATruncate(t3, f0, f2, t2, t1, t5);
-
- switch (elements_kind) {
- case EXTERNAL_BYTE_ELEMENTS:
- case EXTERNAL_UNSIGNED_BYTE_ELEMENTS:
- __ srl(t8, key, 1);
- __ addu(t8, a3, t8);
- __ sb(t3, MemOperand(t8, 0));
- break;
- case EXTERNAL_SHORT_ELEMENTS:
- case EXTERNAL_UNSIGNED_SHORT_ELEMENTS:
- __ addu(t8, a3, key);
- __ sh(t3, MemOperand(t8, 0));
- break;
- case EXTERNAL_INT_ELEMENTS:
- case EXTERNAL_UNSIGNED_INT_ELEMENTS:
- __ sll(t8, key, 1);
- __ addu(t8, a3, t8);
- __ sw(t3, MemOperand(t8, 0));
- break;
- case EXTERNAL_PIXEL_ELEMENTS:
- case EXTERNAL_FLOAT_ELEMENTS:
- case EXTERNAL_DOUBLE_ELEMENTS:
- case FAST_ELEMENTS:
- case FAST_SMI_ELEMENTS:
- case FAST_DOUBLE_ELEMENTS:
- case FAST_HOLEY_ELEMENTS:
- case FAST_HOLEY_SMI_ELEMENTS:
- case FAST_HOLEY_DOUBLE_ELEMENTS:
- case DICTIONARY_ELEMENTS:
- case NON_STRICT_ARGUMENTS_ELEMENTS:
- UNREACHABLE();
- break;
- }
- }
-
- // Entry registers are intact, a0 holds the value
- // which is the return value.
- __ Ret(USE_DELAY_SLOT);
- __ mov(v0, a0);
- }
-
- // Slow case, key and receiver still in a0 and a1.
- __ bind(&slow);
- __ IncrementCounter(
- masm->isolate()->counters()->keyed_load_external_array_slow(),
- 1, a2, a3);
- // Entry registers are intact.
- // ---------- S t a t e --------------
- // -- ra : return address
- // -- a0 : key
- // -- a1 : receiver
- // -----------------------------------
- TailCallBuiltin(masm, Builtins::kKeyedStoreIC_Slow);
-
- // Miss case, call the runtime.
- __ bind(&miss_force_generic);
-
- // ---------- S t a t e --------------
- // -- ra : return address
- // -- a0 : key
- // -- a1 : receiver
- // -----------------------------------
- TailCallBuiltin(masm, Builtins::kKeyedStoreIC_MissForceGeneric);
-}
-
-
-void KeyedStoreStubCompiler::GenerateStoreFastElement(
- MacroAssembler* masm,
- bool is_js_array,
- ElementsKind elements_kind,
- KeyedAccessStoreMode store_mode) {
- // ----------- S t a t e -------------
- // -- a0 : value
- // -- a1 : key
- // -- a2 : receiver
- // -- ra : return address
- // -- a3 : scratch
- // -- a4 : scratch (elements)
- // -----------------------------------
- Label miss_force_generic, transition_elements_kind, grow, slow;
- Label finish_store, check_capacity;
-
- Register value_reg = a0;
- Register key_reg = a1;
- Register receiver_reg = a2;
- Register scratch = t0;
- Register elements_reg = a3;
- Register length_reg = t1;
- Register scratch2 = t2;
-
- // This stub is meant to be tail-jumped to, the receiver must already
- // have been verified by the caller to not be a smi.
-
- // Check that the key is a smi or a heap number convertible to a smi.
- GenerateSmiKeyCheck(masm, key_reg, t0, t1, f2, f4, &miss_force_generic);
-
- if (IsFastSmiElementsKind(elements_kind)) {
- __ JumpIfNotSmi(value_reg, &transition_elements_kind);
- }
-
- // Check that the key is within bounds.
- __ lw(elements_reg,
- FieldMemOperand(receiver_reg, JSObject::kElementsOffset));
- if (is_js_array) {
- __ lw(scratch, FieldMemOperand(receiver_reg, JSArray::kLengthOffset));
- } else {
- __ lw(scratch, FieldMemOperand(elements_reg, FixedArray::kLengthOffset));
- }
- // Compare smis.
- if (is_js_array && IsGrowStoreMode(store_mode)) {
- __ Branch(&grow, hs, key_reg, Operand(scratch));
- } else {
- __ Branch(&miss_force_generic, hs, key_reg, Operand(scratch));
- }
-
- // Make sure elements is a fast element array, not 'cow'.
- __ CheckMap(elements_reg,
- scratch,
- Heap::kFixedArrayMapRootIndex,
- &miss_force_generic,
- DONT_DO_SMI_CHECK);
-
- __ bind(&finish_store);
-
- if (IsFastSmiElementsKind(elements_kind)) {
- __ Addu(scratch,
- elements_reg,
- Operand(FixedArray::kHeaderSize - kHeapObjectTag));
- STATIC_ASSERT(kSmiTag == 0 && kSmiTagSize < kPointerSizeLog2);
- __ sll(scratch2, key_reg, kPointerSizeLog2 - kSmiTagSize);
- __ Addu(scratch, scratch, scratch2);
- __ sw(value_reg, MemOperand(scratch));
- } else {
- ASSERT(IsFastObjectElementsKind(elements_kind));
- __ Addu(scratch,
- elements_reg,
- Operand(FixedArray::kHeaderSize - kHeapObjectTag));
- STATIC_ASSERT(kSmiTag == 0 && kSmiTagSize < kPointerSizeLog2);
- __ sll(scratch2, key_reg, kPointerSizeLog2 - kSmiTagSize);
- __ Addu(scratch, scratch, scratch2);
- __ sw(value_reg, MemOperand(scratch));
- __ mov(receiver_reg, value_reg);
- __ RecordWrite(elements_reg, // Object.
- scratch, // Address.
- receiver_reg, // Value.
- kRAHasNotBeenSaved,
- kDontSaveFPRegs);
- }
- // value_reg (a0) is preserved.
- // Done.
- __ Ret();
-
- __ bind(&miss_force_generic);
- TailCallBuiltin(masm, Builtins::kKeyedStoreIC_MissForceGeneric);
-
- __ bind(&transition_elements_kind);
- TailCallBuiltin(masm, Builtins::kKeyedStoreIC_Miss);
-
- if (is_js_array && IsGrowStoreMode(store_mode)) {
- // Grow the array by a single element if possible.
- __ bind(&grow);
-
- // Make sure the array is only growing by a single element, anything else
- // must be handled by the runtime.
- __ Branch(&miss_force_generic, ne, key_reg, Operand(scratch));
-
- // Check for the empty array, and preallocate a small backing store if
- // possible.
- __ lw(length_reg,
- FieldMemOperand(receiver_reg, JSArray::kLengthOffset));
- __ lw(elements_reg,
- FieldMemOperand(receiver_reg, JSObject::kElementsOffset));
- __ LoadRoot(at, Heap::kEmptyFixedArrayRootIndex);
- __ Branch(&check_capacity, ne, elements_reg, Operand(at));
-
- int size = FixedArray::SizeFor(JSArray::kPreallocatedArrayElements);
- __ Allocate(size, elements_reg, scratch, scratch2, &slow, TAG_OBJECT);
-
- __ LoadRoot(scratch, Heap::kFixedArrayMapRootIndex);
- __ sw(scratch, FieldMemOperand(elements_reg, JSObject::kMapOffset));
- __ li(scratch, Operand(Smi::FromInt(JSArray::kPreallocatedArrayElements)));
- __ sw(scratch, FieldMemOperand(elements_reg, FixedArray::kLengthOffset));
- __ LoadRoot(scratch, Heap::kTheHoleValueRootIndex);
- for (int i = 1; i < JSArray::kPreallocatedArrayElements; ++i) {
- __ sw(scratch, FieldMemOperand(elements_reg, FixedArray::SizeFor(i)));
- }
-
- // Store the element at index zero.
- __ sw(value_reg, FieldMemOperand(elements_reg, FixedArray::SizeFor(0)));
-
- // Install the new backing store in the JSArray.
- __ sw(elements_reg,
- FieldMemOperand(receiver_reg, JSObject::kElementsOffset));
- __ RecordWriteField(receiver_reg, JSObject::kElementsOffset, elements_reg,
- scratch, kRAHasNotBeenSaved, kDontSaveFPRegs,
- EMIT_REMEMBERED_SET, OMIT_SMI_CHECK);
-
- // Increment the length of the array.
- __ li(length_reg, Operand(Smi::FromInt(1)));
- __ Ret(USE_DELAY_SLOT);
- __ sw(length_reg, FieldMemOperand(receiver_reg, JSArray::kLengthOffset));
-
- __ bind(&check_capacity);
- // Check for cow elements, in general they are not handled by this stub
- __ CheckMap(elements_reg,
- scratch,
- Heap::kFixedCOWArrayMapRootIndex,
- &miss_force_generic,
- DONT_DO_SMI_CHECK);
-
- __ lw(scratch, FieldMemOperand(elements_reg, FixedArray::kLengthOffset));
- __ Branch(&slow, hs, length_reg, Operand(scratch));
-
- // Grow the array and finish the store.
- __ Addu(length_reg, length_reg, Operand(Smi::FromInt(1)));
- __ sw(length_reg, FieldMemOperand(receiver_reg, JSArray::kLengthOffset));
- __ jmp(&finish_store);
-
- __ bind(&slow);
- TailCallBuiltin(masm, Builtins::kKeyedStoreIC_Slow);
- }
-}
-
-
-void KeyedStoreStubCompiler::GenerateStoreFastDoubleElement(
- MacroAssembler* masm,
- bool is_js_array,
- KeyedAccessStoreMode store_mode) {
- // ----------- S t a t e -------------
- // -- a0 : value
- // -- a1 : key
- // -- a2 : receiver
- // -- ra : return address
- // -- a3 : scratch (elements backing store)
- // -- t0 : scratch (elements_reg)
- // -- t1 : scratch (mantissa_reg)
- // -- t2 : scratch (exponent_reg)
- // -- t3 : scratch4
- // -- t4 : scratch
- // -----------------------------------
- Label miss_force_generic, transition_elements_kind, grow, slow;
- Label finish_store, check_capacity;
-
- Register value_reg = a0;
- Register key_reg = a1;
- Register receiver_reg = a2;
- Register elements_reg = a3;
- Register scratch1 = t0;
- Register scratch2 = t1;
- Register scratch3 = t2;
- Register scratch4 = t3;
- Register scratch5 = t4;
- Register length_reg = t3;
-
- // This stub is meant to be tail-jumped to, the receiver must already
- // have been verified by the caller to not be a smi.
-
- // Check that the key is a smi or a heap number convertible to a smi.
- GenerateSmiKeyCheck(masm, key_reg, t0, t1, f2, f4, &miss_force_generic);
-
- __ lw(elements_reg,
- FieldMemOperand(receiver_reg, JSObject::kElementsOffset));
-
- // Check that the key is within bounds.
- if (is_js_array) {
- __ lw(scratch1, FieldMemOperand(receiver_reg, JSArray::kLengthOffset));
- } else {
- __ lw(scratch1,
- FieldMemOperand(elements_reg, FixedArray::kLengthOffset));
- }
- // Compare smis, unsigned compare catches both negative and out-of-bound
- // indexes.
- if (IsGrowStoreMode(store_mode)) {
- __ Branch(&grow, hs, key_reg, Operand(scratch1));
- } else {
- __ Branch(&miss_force_generic, hs, key_reg, Operand(scratch1));
- }
-
- __ bind(&finish_store);
-
- __ StoreNumberToDoubleElements(value_reg,
- key_reg,
- // All registers after this are overwritten.
- elements_reg,
- scratch1,
- scratch2,
- scratch3,
- scratch4,
- &transition_elements_kind);
-
- __ Ret(USE_DELAY_SLOT);
- __ mov(v0, value_reg); // In delay slot.
-
- // Handle store cache miss, replacing the ic with the generic stub.
- __ bind(&miss_force_generic);
- TailCallBuiltin(masm, Builtins::kKeyedStoreIC_MissForceGeneric);
-
- __ bind(&transition_elements_kind);
- TailCallBuiltin(masm, Builtins::kKeyedStoreIC_Miss);
-
- if (is_js_array && IsGrowStoreMode(store_mode)) {
- // Grow the array by a single element if possible.
- __ bind(&grow);
-
- // Make sure the array is only growing by a single element, anything else
- // must be handled by the runtime.
- __ Branch(&miss_force_generic, ne, key_reg, Operand(scratch1));
-
- // Transition on values that can't be stored in a FixedDoubleArray.
- Label value_is_smi;
- __ JumpIfSmi(value_reg, &value_is_smi);
- __ lw(scratch1, FieldMemOperand(value_reg, HeapObject::kMapOffset));
- __ LoadRoot(at, Heap::kHeapNumberMapRootIndex);
- __ Branch(&transition_elements_kind, ne, scratch1, Operand(at));
- __ bind(&value_is_smi);
-
- // Check for the empty array, and preallocate a small backing store if
- // possible.
- __ lw(length_reg,
- FieldMemOperand(receiver_reg, JSArray::kLengthOffset));
- __ lw(elements_reg,
- FieldMemOperand(receiver_reg, JSObject::kElementsOffset));
- __ LoadRoot(at, Heap::kEmptyFixedArrayRootIndex);
- __ Branch(&check_capacity, ne, elements_reg, Operand(at));
-
- int size = FixedDoubleArray::SizeFor(JSArray::kPreallocatedArrayElements);
- __ Allocate(size, elements_reg, scratch1, scratch2, &slow, TAG_OBJECT);
-
- // Initialize the new FixedDoubleArray.
- __ LoadRoot(scratch1, Heap::kFixedDoubleArrayMapRootIndex);
- __ sw(scratch1, FieldMemOperand(elements_reg, JSObject::kMapOffset));
- __ li(scratch1, Operand(Smi::FromInt(JSArray::kPreallocatedArrayElements)));
- __ sw(scratch1,
- FieldMemOperand(elements_reg, FixedDoubleArray::kLengthOffset));
-
- __ mov(scratch1, elements_reg);
- __ StoreNumberToDoubleElements(value_reg,
- key_reg,
- // All registers after this are overwritten.
- scratch1,
- scratch2,
- scratch3,
- scratch4,
- scratch5,
- &transition_elements_kind);
-
- __ li(scratch1, Operand(kHoleNanLower32));
- __ li(scratch2, Operand(kHoleNanUpper32));
- for (int i = 1; i < JSArray::kPreallocatedArrayElements; i++) {
- int offset = FixedDoubleArray::OffsetOfElementAt(i);
- __ sw(scratch1, FieldMemOperand(elements_reg, offset));
- __ sw(scratch2, FieldMemOperand(elements_reg, offset + kPointerSize));
- }
-
- // Install the new backing store in the JSArray.
- __ sw(elements_reg,
- FieldMemOperand(receiver_reg, JSObject::kElementsOffset));
- __ RecordWriteField(receiver_reg, JSObject::kElementsOffset, elements_reg,
- scratch1, kRAHasNotBeenSaved, kDontSaveFPRegs,
- EMIT_REMEMBERED_SET, OMIT_SMI_CHECK);
-
- // Increment the length of the array.
- __ li(length_reg, Operand(Smi::FromInt(1)));
- __ sw(length_reg, FieldMemOperand(receiver_reg, JSArray::kLengthOffset));
- __ Ret(USE_DELAY_SLOT);
- __ lw(elements_reg,
- FieldMemOperand(receiver_reg, JSObject::kElementsOffset));
-
- __ bind(&check_capacity);
- // Make sure that the backing store can hold additional elements.
- __ lw(scratch1,
- FieldMemOperand(elements_reg, FixedDoubleArray::kLengthOffset));
- __ Branch(&slow, hs, length_reg, Operand(scratch1));
-
- // Grow the array and finish the store.
- __ Addu(length_reg, length_reg, Operand(Smi::FromInt(1)));
- __ sw(length_reg, FieldMemOperand(receiver_reg, JSArray::kLengthOffset));
- __ jmp(&finish_store);
-
- __ bind(&slow);
- TailCallBuiltin(masm, Builtins::kKeyedStoreIC_Slow);
- }
-}
-
-
#undef __
} } // namespace v8::internal
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