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Unified Diff: src/arm64/code-stubs-arm64.cc

Issue 1884883003: Revert of [Atomics] code stubs for atomic operations (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Created 4 years, 8 months ago
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Index: src/arm64/code-stubs-arm64.cc
diff --git a/src/arm64/code-stubs-arm64.cc b/src/arm64/code-stubs-arm64.cc
index 13438cfadeb37aa37ff9ecb7d987726a2cdd92fc..f0265c73cee09edb9d889b803cf853f73edcc0fd 100644
--- a/src/arm64/code-stubs-arm64.cc
+++ b/src/arm64/code-stubs-arm64.cc
@@ -5939,144 +5939,6 @@
return_value_operand, NULL);
}
-namespace {
-
-void GetTypedArrayBackingStore(MacroAssembler* masm, Register backing_store,
- Register object, Register scratch,
- FPRegister double_scratch) {
- Label offset_is_not_smi, done;
- __ Ldr(scratch, FieldMemOperand(object, JSTypedArray::kBufferOffset));
- __ Ldr(backing_store,
- FieldMemOperand(scratch, JSArrayBuffer::kBackingStoreOffset));
- __ Ldr(scratch,
- FieldMemOperand(object, JSArrayBufferView::kByteOffsetOffset));
- __ JumpIfNotSmi(scratch, &offset_is_not_smi);
- // offset is smi
- __ Add(backing_store, backing_store, Operand::UntagSmi(scratch));
- __ B(&done);
-
- // offset is a heap number
- __ Bind(&offset_is_not_smi);
- __ Ldr(double_scratch, FieldMemOperand(scratch, HeapNumber::kValueOffset));
- __ Fcvtzu(scratch, double_scratch);
- __ Add(backing_store, backing_store, scratch);
- __ Bind(&done);
-}
-
-void TypedArrayJumpTable(MacroAssembler* masm, Register object,
- Register scratch, Register scratch2, Label* i8,
- Label* u8, Label* i16, Label* u16, Label* i32,
- Label* u32, Label* u8c) {
- STATIC_ASSERT(FIXED_UINT8_ARRAY_TYPE == FIXED_INT8_ARRAY_TYPE + 1);
- STATIC_ASSERT(FIXED_INT16_ARRAY_TYPE == FIXED_INT8_ARRAY_TYPE + 2);
- STATIC_ASSERT(FIXED_UINT16_ARRAY_TYPE == FIXED_INT8_ARRAY_TYPE + 3);
- STATIC_ASSERT(FIXED_INT32_ARRAY_TYPE == FIXED_INT8_ARRAY_TYPE + 4);
- STATIC_ASSERT(FIXED_UINT32_ARRAY_TYPE == FIXED_INT8_ARRAY_TYPE + 5);
- STATIC_ASSERT(FIXED_FLOAT32_ARRAY_TYPE == FIXED_INT8_ARRAY_TYPE + 6);
- STATIC_ASSERT(FIXED_FLOAT64_ARRAY_TYPE == FIXED_INT8_ARRAY_TYPE + 7);
- STATIC_ASSERT(FIXED_UINT8_CLAMPED_ARRAY_TYPE == FIXED_INT8_ARRAY_TYPE + 8);
-
- __ Ldr(scratch, FieldMemOperand(object, JSObject::kElementsOffset));
- __ Ldr(scratch, FieldMemOperand(scratch, HeapObject::kMapOffset));
- __ Ldrb(scratch, FieldMemOperand(scratch, Map::kInstanceTypeOffset));
- __ Subs(scratch, scratch,
- Operand(static_cast<uint8_t>(FIXED_INT8_ARRAY_TYPE)));
- __ Assert(ge, kOffsetOutOfRange);
-
- Label abort;
- Label table;
-
- __ Adr(scratch2, &table);
- __ Add(scratch, scratch2, Operand(scratch, UXTW, 2));
- __ Br(scratch);
-
- __ StartBlockPools();
- __ Bind(&table);
- __ B(i8); // Int8Array
- __ B(u8); // Uint8Array
- __ B(i16); // Int16Array
- __ B(u16); // Uint16Array
- __ B(i32); // Int32Array
- __ B(u32); // Uint32Array
- __ B(&abort); // Float32Array
- __ B(&abort); // Float64Array
- __ B(u8c); // Uint8ClampedArray
- __ EndBlockPools();
-
- __ Bind(&abort);
- __ Abort(kNoReason);
-}
-
-void ReturnUnsignedInteger32(MacroAssembler* masm, FPRegister dst,
- Register value, Register scratch,
- Register scratch2) {
- Label not_smi, call_runtime;
- __ Tbnz(value, 31, &not_smi);
- __ SmiTag(x0, value);
- __ Ret();
-
- __ Bind(&not_smi);
- __ Ucvtf(dst, value);
- __ AllocateHeapNumber(x0, &call_runtime, scratch, scratch2, dst);
- __ Ret();
-
- __ Bind(&call_runtime);
- {
- FrameScope scope(masm, StackFrame::INTERNAL);
- __ CallRuntimeSaveDoubles(Runtime::kAllocateHeapNumber);
- __ Str(value, FieldMemOperand(x0, HeapNumber::kValueOffset));
- }
- __ Ret();
-}
-
-} // anonymous namespace
-
-void AtomicsLoadStub::Generate(MacroAssembler* masm) {
- Register object = x1;
- Register index = x0; // Index is an untagged word32.
- Register backing_store = x2;
- Label i8, u8, i16, u16, i32, u32;
-
- GetTypedArrayBackingStore(masm, backing_store, object, x3, d0);
- TypedArrayJumpTable(masm, object, x3, x4, &i8, &u8, &i16, &u16, &i32, &u32,
- &u8);
-
- __ Bind(&i8);
- __ Ldrsb(x0, MemOperand(backing_store, index));
- __ Dmb(InnerShareable, BarrierAll);
- __ SmiTag(x0);
- __ Ret();
-
- __ Bind(&u8);
- __ Ldrb(x0, MemOperand(backing_store, index));
- __ Dmb(InnerShareable, BarrierAll);
- __ SmiTag(x0);
- __ Ret();
-
- __ Bind(&i16);
- __ Ldrsh(x0, MemOperand(backing_store, index, UXTW, 1));
- __ Dmb(InnerShareable, BarrierAll);
- __ SmiTag(x0);
- __ Ret();
-
- __ Bind(&u16);
- __ Ldrh(x0, MemOperand(backing_store, index, UXTW, 1));
- __ Dmb(InnerShareable, BarrierAll);
- __ SmiTag(x0);
- __ Ret();
-
- __ Bind(&i32);
- __ Ldrsw(x0, MemOperand(backing_store, index, UXTW, 2));
- __ Dmb(InnerShareable, BarrierAll);
- DCHECK(SmiValuesAre32Bits());
- __ SmiTag(x0);
- __ Ret();
-
- __ Bind(&u32);
- __ Ldr(w0, MemOperand(backing_store, index, UXTW, 2));
- __ Dmb(InnerShareable, BarrierAll);
- ReturnUnsignedInteger32(masm, d0, x0, x1, x2);
-}
#undef __
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