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// 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
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "v8.h"
#if defined(V8_TARGET_ARCH_ARM)
#include "codegen.h"
#include "macro-assembler.h"
namespace v8 {
namespace internal {
#define __ ACCESS_MASM(masm)
// -------------------------------------------------------------------------
// Platform-specific RuntimeCallHelper functions.
void StubRuntimeCallHelper::BeforeCall(MacroAssembler* masm) const {
masm->EnterFrame(StackFrame::INTERNAL);
ASSERT(!masm->has_frame());
masm->set_has_frame(true);
}
void StubRuntimeCallHelper::AfterCall(MacroAssembler* masm) const {
masm->LeaveFrame(StackFrame::INTERNAL);
ASSERT(masm->has_frame());
masm->set_has_frame(false);
}
// -------------------------------------------------------------------------
// Code generators
void ElementsTransitionGenerator::GenerateSmiOnlyToObject(
MacroAssembler* masm) {
// ----------- S t a t e -------------
// -- r0 : value
// -- r1 : key
// -- r2 : receiver
// -- lr : return address
// -- r3 : target map, scratch for subsequent call
// -- r4 : scratch (elements)
// -----------------------------------
// Set transitioned map.
__ str(r3, FieldMemOperand(r2, HeapObject::kMapOffset));
__ RecordWriteField(r2,
HeapObject::kMapOffset,
r3,
r9,
kLRHasNotBeenSaved,
kDontSaveFPRegs,
EMIT_REMEMBERED_SET,
OMIT_SMI_CHECK);
}
void ElementsTransitionGenerator::GenerateSmiOnlyToDouble(
MacroAssembler* masm, Label* fail) {
// ----------- S t a t e -------------
// -- r0 : value
// -- r1 : key
// -- r2 : receiver
// -- lr : return address
// -- r3 : target map, scratch for subsequent call
// -- r4 : scratch (elements)
// -----------------------------------
Label loop, entry, convert_hole, gc_required;
bool vfp3_supported = CpuFeatures::IsSupported(VFP3);
__ push(lr);
__ ldr(r4, FieldMemOperand(r2, JSObject::kElementsOffset));
__ ldr(r5, FieldMemOperand(r4, FixedArray::kLengthOffset));
// r4: source FixedArray
// r5: number of elements (smi-tagged)
// Allocate new FixedDoubleArray.
__ mov(lr, Operand(FixedDoubleArray::kHeaderSize));
__ add(lr, lr, Operand(r5, LSL, 2));
__ AllocateInNewSpace(lr, r6, r7, r9, &gc_required, NO_ALLOCATION_FLAGS);
// r6: destination FixedDoubleArray, not tagged as heap object
__ LoadRoot(r9, Heap::kFixedDoubleArrayMapRootIndex);
__ str(r9, MemOperand(r6, HeapObject::kMapOffset));
// Set destination FixedDoubleArray's length.
__ str(r5, MemOperand(r6, FixedDoubleArray::kLengthOffset));
// Update receiver's map.
__ str(r3, FieldMemOperand(r2, HeapObject::kMapOffset));
__ RecordWriteField(r2,
HeapObject::kMapOffset,
r3,
r9,
kLRHasBeenSaved,
kDontSaveFPRegs,
EMIT_REMEMBERED_SET,
OMIT_SMI_CHECK);
// Replace receiver's backing store with newly created FixedDoubleArray.
__ add(r3, r6, Operand(kHeapObjectTag));
__ str(r3, FieldMemOperand(r2, JSObject::kElementsOffset));
__ RecordWriteField(r2,
JSObject::kElementsOffset,
r3,
r9,
kLRHasBeenSaved,
kDontSaveFPRegs,
EMIT_REMEMBERED_SET,
OMIT_SMI_CHECK);
// Prepare for conversion loop.
__ add(r3, r4, Operand(FixedArray::kHeaderSize - kHeapObjectTag));
__ add(r7, r6, Operand(FixedDoubleArray::kHeaderSize));
__ add(r6, r7, Operand(r5, LSL, 2));
__ mov(r4, Operand(kHoleNanLower32));
__ mov(r5, Operand(kHoleNanUpper32));
// r3: begin of source FixedArray element fields, not tagged
// r4: kHoleNanLower32
// r5: kHoleNanUpper32
// r6: end of destination FixedDoubleArray, not tagged
// r7: begin of FixedDoubleArray element fields, not tagged
if (!vfp3_supported) __ Push(r1, r0);
__ b(&entry);
// Call into runtime if GC is required.
__ bind(&gc_required);
__ pop(lr);
__ b(fail);
// Convert and copy elements.
__ bind(&loop);
__ ldr(r9, MemOperand(r3, 4, PostIndex));
// r9: current element
__ JumpIfNotSmi(r9, &convert_hole);
// Normal smi, convert to double and store.
__ SmiUntag(r9);
if (vfp3_supported) {
CpuFeatures::Scope scope(VFP3);
__ vmov(s0, r9);
__ vcvt_f64_s32(d0, s0);
__ vstr(d0, r7, 0);
__ add(r7, r7, Operand(8));
} else {
FloatingPointHelper::ConvertIntToDouble(masm,
r9,
FloatingPointHelper::kCoreRegisters,
d0,
r0,
r1,
lr,
s0);
__ Strd(r0, r1, MemOperand(r7, 8, PostIndex));
}
__ b(&entry);
// Hole found, store the-hole NaN.
__ bind(&convert_hole);
__ Strd(r4, r5, MemOperand(r7, 8, PostIndex));
__ bind(&entry);
__ cmp(r7, r6);
__ b(lt, &loop);
if (!vfp3_supported) __ Pop(r1, r0);
__ pop(lr);
}
void ElementsTransitionGenerator::GenerateDoubleToObject(
MacroAssembler* masm, Label* fail) {
// ----------- S t a t e -------------
// -- r0 : value
// -- r1 : key
// -- r2 : receiver
// -- lr : return address
// -- r3 : target map, scratch for subsequent call
// -- r4 : scratch (elements)
// -----------------------------------
Label entry, loop, convert_hole, gc_required;
__ push(lr);
__ Push(r3, r2, r1, r0);
__ ldr(r4, FieldMemOperand(r2, JSObject::kElementsOffset));
__ ldr(r5, FieldMemOperand(r4, FixedArray::kLengthOffset));
// r4: source FixedDoubleArray
// r5: number of elements (smi-tagged)
// Allocate new FixedArray.
__ mov(r0, Operand(FixedDoubleArray::kHeaderSize));
__ add(r0, r0, Operand(r5, LSL, 1));
__ AllocateInNewSpace(r0, r6, r7, r9, &gc_required, NO_ALLOCATION_FLAGS);
// r6: destination FixedArray, not tagged as heap object
__ LoadRoot(r9, Heap::kFixedArrayMapRootIndex);
__ str(r9, MemOperand(r6, HeapObject::kMapOffset));
// Set destination FixedDoubleArray's length.
__ str(r5, MemOperand(r6, FixedDoubleArray::kLengthOffset));
// Prepare for conversion loop.
__ add(r4, r4, Operand(FixedDoubleArray::kHeaderSize - kHeapObjectTag + 4));
__ add(r3, r6, Operand(FixedArray::kHeaderSize));
__ add(r6, r6, Operand(kHeapObjectTag));
__ add(r5, r3, Operand(r5, LSL, 1));
__ LoadRoot(r7, Heap::kTheHoleValueRootIndex);
__ LoadRoot(r9, Heap::kHeapNumberMapRootIndex);
// Using offsetted addresses in r4 to fully take advantage of post-indexing.
// r3: begin of destination FixedArray element fields, not tagged
// r4: begin of source FixedDoubleArray element fields, not tagged, +4
// r5: end of destination FixedArray, not tagged
// r6: destination FixedArray
// r7: the-hole pointer
// r9: heap number map
__ b(&entry);
// Call into runtime if GC is required.
__ bind(&gc_required);
__ Pop(r3, r2, r1, r0);
__ pop(lr);
__ b(fail);
__ bind(&loop);
__ ldr(r1, MemOperand(r4, 8, PostIndex));
// lr: current element's upper 32 bit
// r4: address of next element's upper 32 bit
__ cmp(r1, Operand(kHoleNanUpper32));
__ b(eq, &convert_hole);
// Non-hole double, copy value into a heap number.
__ AllocateHeapNumber(r2, r0, lr, r9, &gc_required);
// r2: new heap number
__ ldr(r0, MemOperand(r4, 12, NegOffset));
__ Strd(r0, r1, FieldMemOperand(r2, HeapNumber::kValueOffset));
__ mov(r0, r3);
__ str(r2, MemOperand(r3, 4, PostIndex));
__ RecordWrite(r6,
r0,
r2,
kLRHasBeenSaved,
kDontSaveFPRegs,
EMIT_REMEMBERED_SET,
OMIT_SMI_CHECK);
__ b(&entry);
// Replace the-hole NaN with the-hole pointer.
__ bind(&convert_hole);
__ str(r7, MemOperand(r3, 4, PostIndex));
__ bind(&entry);
__ cmp(r3, r5);
__ b(lt, &loop);
__ Pop(r3, r2, r1, r0);
// Update receiver's map.
__ str(r3, FieldMemOperand(r2, HeapObject::kMapOffset));
__ RecordWriteField(r2,
HeapObject::kMapOffset,
r3,
r9,
kLRHasBeenSaved,
kDontSaveFPRegs,
EMIT_REMEMBERED_SET,
OMIT_SMI_CHECK);
// Replace receiver's backing store with newly created and filled FixedArray.
__ str(r6, FieldMemOperand(r2, JSObject::kElementsOffset));
__ RecordWriteField(r2,
JSObject::kElementsOffset,
r6,
r9,
kLRHasBeenSaved,
kDontSaveFPRegs,
EMIT_REMEMBERED_SET,
OMIT_SMI_CHECK);
__ pop(lr);
}
#undef __
} } // namespace v8::internal
#endif // V8_TARGET_ARCH_ARM
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