| // 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_MIPS) |
| |
| #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 ------------- |
| // -- a0 : value |
| // -- a1 : key |
| // -- a2 : receiver |
| // -- ra : return address |
| // -- a3 : target map, scratch for subsequent call |
| // -- t0 : scratch (elements) |
| // ----------------------------------- |
| // Set transitioned map. |
| __ sw(a3, FieldMemOperand(a2, HeapObject::kMapOffset)); |
| __ RecordWriteField(a2, |
| HeapObject::kMapOffset, |
| a3, |
| t5, |
| kRAHasNotBeenSaved, |
| kDontSaveFPRegs, |
| EMIT_REMEMBERED_SET, |
| OMIT_SMI_CHECK); |
| } |
| |
| |
| void ElementsTransitionGenerator::GenerateSmiOnlyToDouble( |
| MacroAssembler* masm, Label* fail) { |
| // ----------- S t a t e ------------- |
| // -- a0 : value |
| // -- a1 : key |
| // -- a2 : receiver |
| // -- ra : return address |
| // -- a3 : target map, scratch for subsequent call |
| // -- t0 : scratch (elements) |
| // ----------------------------------- |
| Label loop, entry, convert_hole, gc_required; |
| bool fpu_supported = CpuFeatures::IsSupported(FPU); |
| __ push(ra); |
| |
| Register scratch = t6; |
| |
| __ lw(t0, FieldMemOperand(a2, JSObject::kElementsOffset)); |
| __ lw(t1, FieldMemOperand(t0, FixedArray::kLengthOffset)); |
| // t0: source FixedArray |
| // t1: number of elements (smi-tagged) |
| |
| // Allocate new FixedDoubleArray. |
| __ sll(scratch, t1, 2); |
| __ Addu(scratch, scratch, FixedDoubleArray::kHeaderSize); |
| __ AllocateInNewSpace(scratch, t2, t3, t5, &gc_required, NO_ALLOCATION_FLAGS); |
| // t2: destination FixedDoubleArray, not tagged as heap object |
| __ LoadRoot(t5, Heap::kFixedDoubleArrayMapRootIndex); |
| __ sw(t5, MemOperand(t2, HeapObject::kMapOffset)); |
| // Set destination FixedDoubleArray's length. |
| __ sw(t1, MemOperand(t2, FixedDoubleArray::kLengthOffset)); |
| // Update receiver's map. |
| |
| __ sw(a3, FieldMemOperand(a2, HeapObject::kMapOffset)); |
| __ RecordWriteField(a2, |
| HeapObject::kMapOffset, |
| a3, |
| t5, |
| kRAHasBeenSaved, |
| kDontSaveFPRegs, |
| EMIT_REMEMBERED_SET, |
| OMIT_SMI_CHECK); |
| // Replace receiver's backing store with newly created FixedDoubleArray. |
| __ Addu(a3, t2, Operand(kHeapObjectTag)); |
| __ sw(a3, FieldMemOperand(a2, JSObject::kElementsOffset)); |
| __ RecordWriteField(a2, |
| JSObject::kElementsOffset, |
| a3, |
| t5, |
| kRAHasBeenSaved, |
| kDontSaveFPRegs, |
| EMIT_REMEMBERED_SET, |
| OMIT_SMI_CHECK); |
| |
| |
| // Prepare for conversion loop. |
| __ Addu(a3, t0, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
| __ Addu(t3, t2, Operand(FixedDoubleArray::kHeaderSize)); |
| __ sll(t2, t1, 2); |
| __ Addu(t2, t2, t3); |
| __ li(t0, Operand(kHoleNanLower32)); |
| __ li(t1, Operand(kHoleNanUpper32)); |
| // t0: kHoleNanLower32 |
| // t1: kHoleNanUpper32 |
| // t2: end of destination FixedDoubleArray, not tagged |
| // t3: begin of FixedDoubleArray element fields, not tagged |
| |
| if (!fpu_supported) __ Push(a1, a0); |
| |
| __ Branch(&entry); |
| |
| // Call into runtime if GC is required. |
| __ bind(&gc_required); |
| __ pop(ra); |
| __ Branch(fail); |
| |
| // Convert and copy elements. |
| __ bind(&loop); |
| __ lw(t5, MemOperand(a3)); |
| __ Addu(a3, a3, kIntSize); |
| // t5: current element |
| __ JumpIfNotSmi(t5, &convert_hole); |
| |
| // Normal smi, convert to double and store. |
| __ SmiUntag(t5); |
| if (fpu_supported) { |
| CpuFeatures::Scope scope(FPU); |
| __ mtc1(t5, f0); |
| __ cvt_d_w(f0, f0); |
| __ sdc1(f0, MemOperand(t3)); |
| __ Addu(t3, t3, kDoubleSize); |
| } else { |
| FloatingPointHelper::ConvertIntToDouble(masm, |
| t5, |
| FloatingPointHelper::kCoreRegisters, |
| f0, |
| a0, |
| a1, |
| t7, |
| f0); |
| __ sw(a0, MemOperand(t3)); // mantissa |
| __ sw(a1, MemOperand(t3, kIntSize)); // exponent |
| __ Addu(t3, t3, kDoubleSize); |
| } |
| __ Branch(&entry); |
| |
| // Hole found, store the-hole NaN. |
| __ bind(&convert_hole); |
| if (FLAG_debug_code) { |
| __ LoadRoot(at, Heap::kTheHoleValueRootIndex); |
| __ Assert(eq, "object found in smi-only array", at, Operand(t5)); |
| } |
| __ sw(t0, MemOperand(t3)); // mantissa |
| __ sw(t1, MemOperand(t3, kIntSize)); // exponent |
| __ Addu(t3, t3, kDoubleSize); |
| |
| __ bind(&entry); |
| __ Branch(&loop, lt, t3, Operand(t2)); |
| |
| if (!fpu_supported) __ Pop(a1, a0); |
| __ pop(ra); |
| } |
| |
| |
| void ElementsTransitionGenerator::GenerateDoubleToObject( |
| MacroAssembler* masm, Label* fail) { |
| // ----------- S t a t e ------------- |
| // -- a0 : value |
| // -- a1 : key |
| // -- a2 : receiver |
| // -- ra : return address |
| // -- a3 : target map, scratch for subsequent call |
| // -- t0 : scratch (elements) |
| // ----------------------------------- |
| Label entry, loop, convert_hole, gc_required; |
| __ MultiPush(a0.bit() | a1.bit() | a2.bit() | a3.bit() | ra.bit()); |
| |
| __ lw(t0, FieldMemOperand(a2, JSObject::kElementsOffset)); |
| __ lw(t1, FieldMemOperand(t0, FixedArray::kLengthOffset)); |
| // t0: source FixedArray |
| // t1: number of elements (smi-tagged) |
| |
| // Allocate new FixedArray. |
| __ sll(a0, t1, 1); |
| __ Addu(a0, a0, FixedDoubleArray::kHeaderSize); |
| __ AllocateInNewSpace(a0, t2, t3, t5, &gc_required, NO_ALLOCATION_FLAGS); |
| // t2: destination FixedArray, not tagged as heap object |
| __ LoadRoot(t5, Heap::kFixedArrayMapRootIndex); |
| __ sw(t5, MemOperand(t2, HeapObject::kMapOffset)); |
| // Set destination FixedDoubleArray's length. |
| __ sw(t1, MemOperand(t2, FixedDoubleArray::kLengthOffset)); |
| |
| // Prepare for conversion loop. |
| __ Addu(t0, t0, Operand(FixedDoubleArray::kHeaderSize - kHeapObjectTag + 4)); |
| __ Addu(a3, t2, Operand(FixedArray::kHeaderSize)); |
| __ Addu(t2, t2, Operand(kHeapObjectTag)); |
| __ sll(t1, t1, 1); |
| __ Addu(t1, a3, t1); |
| __ LoadRoot(t3, Heap::kTheHoleValueRootIndex); |
| __ LoadRoot(t5, Heap::kHeapNumberMapRootIndex); |
| // Using offsetted addresses. |
| // a3: begin of destination FixedArray element fields, not tagged |
| // t0: begin of source FixedDoubleArray element fields, not tagged, +4 |
| // t1: end of destination FixedArray, not tagged |
| // t2: destination FixedArray |
| // t3: the-hole pointer |
| // t5: heap number map |
| __ Branch(&entry); |
| |
| // Call into runtime if GC is required. |
| __ bind(&gc_required); |
| __ MultiPop(a0.bit() | a1.bit() | a2.bit() | a3.bit() | ra.bit()); |
| |
| __ Branch(fail); |
| |
| __ bind(&loop); |
| __ lw(a1, MemOperand(t0)); |
| __ Addu(t0, t0, kDoubleSize); |
| // a1: current element's upper 32 bit |
| // t0: address of next element's upper 32 bit |
| __ Branch(&convert_hole, eq, a1, Operand(kHoleNanUpper32)); |
| |
| // Non-hole double, copy value into a heap number. |
| __ AllocateHeapNumber(a2, a0, t6, t5, &gc_required); |
| // a2: new heap number |
| __ lw(a0, MemOperand(t0, -12)); |
| __ sw(a0, FieldMemOperand(a2, HeapNumber::kMantissaOffset)); |
| __ sw(a1, FieldMemOperand(a2, HeapNumber::kExponentOffset)); |
| __ mov(a0, a3); |
| __ sw(a2, MemOperand(a3)); |
| __ Addu(a3, a3, kIntSize); |
| __ RecordWrite(t2, |
| a0, |
| a2, |
| kRAHasBeenSaved, |
| kDontSaveFPRegs, |
| EMIT_REMEMBERED_SET, |
| OMIT_SMI_CHECK); |
| __ Branch(&entry); |
| |
| // Replace the-hole NaN with the-hole pointer. |
| __ bind(&convert_hole); |
| __ sw(t3, MemOperand(a3)); |
| __ Addu(a3, a3, kIntSize); |
| |
| __ bind(&entry); |
| __ Branch(&loop, lt, a3, Operand(t1)); |
| |
| __ MultiPop(a2.bit() | a3.bit() | a0.bit() | a1.bit()); |
| // Update receiver's map. |
| __ sw(a3, FieldMemOperand(a2, HeapObject::kMapOffset)); |
| __ RecordWriteField(a2, |
| HeapObject::kMapOffset, |
| a3, |
| t5, |
| kRAHasBeenSaved, |
| kDontSaveFPRegs, |
| EMIT_REMEMBERED_SET, |
| OMIT_SMI_CHECK); |
| // Replace receiver's backing store with newly created and filled FixedArray. |
| __ sw(t2, FieldMemOperand(a2, JSObject::kElementsOffset)); |
| __ RecordWriteField(a2, |
| JSObject::kElementsOffset, |
| t2, |
| t5, |
| kRAHasBeenSaved, |
| kDontSaveFPRegs, |
| EMIT_REMEMBERED_SET, |
| OMIT_SMI_CHECK); |
| __ pop(ra); |
| } |
| |
| |
| void StringCharLoadGenerator::Generate(MacroAssembler* masm, |
| Register string, |
| Register index, |
| Register result, |
| Label* call_runtime) { |
| // Fetch the instance type of the receiver into result register. |
| __ lw(result, FieldMemOperand(string, HeapObject::kMapOffset)); |
| __ lbu(result, FieldMemOperand(result, Map::kInstanceTypeOffset)); |
| |
| // We need special handling for indirect strings. |
| Label check_sequential; |
| __ And(at, result, Operand(kIsIndirectStringMask)); |
| __ Branch(&check_sequential, eq, at, Operand(zero_reg)); |
| |
| // Dispatch on the indirect string shape: slice or cons. |
| Label cons_string; |
| __ And(at, result, Operand(kSlicedNotConsMask)); |
| __ Branch(&cons_string, eq, at, Operand(zero_reg)); |
| |
| // Handle slices. |
| Label indirect_string_loaded; |
| __ lw(result, FieldMemOperand(string, SlicedString::kOffsetOffset)); |
| __ sra(at, result, kSmiTagSize); |
| __ Addu(index, index, at); |
| __ lw(string, FieldMemOperand(string, SlicedString::kParentOffset)); |
| __ jmp(&indirect_string_loaded); |
| |
| // Handle cons strings. |
| // Check whether the right hand side is the empty string (i.e. if |
| // this is really a flat string in a cons string). If that is not |
| // the case we would rather go to the runtime system now to flatten |
| // the string. |
| __ bind(&cons_string); |
| __ lw(result, FieldMemOperand(string, ConsString::kSecondOffset)); |
| __ LoadRoot(at, Heap::kEmptyStringRootIndex); |
| __ Branch(call_runtime, ne, result, Operand(at)); |
| // Get the first of the two strings and load its instance type. |
| __ lw(string, FieldMemOperand(string, ConsString::kFirstOffset)); |
| |
| __ bind(&indirect_string_loaded); |
| __ lw(result, FieldMemOperand(string, HeapObject::kMapOffset)); |
| __ lbu(result, FieldMemOperand(result, Map::kInstanceTypeOffset)); |
| |
| // Distinguish sequential and external strings. Only these two string |
| // representations can reach here (slices and flat cons strings have been |
| // reduced to the underlying sequential or external string). |
| Label external_string, check_encoding; |
| __ bind(&check_sequential); |
| STATIC_ASSERT(kSeqStringTag == 0); |
| __ And(at, result, Operand(kStringRepresentationMask)); |
| __ Branch(&external_string, ne, at, Operand(zero_reg)); |
| |
| // Prepare sequential strings |
| STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqAsciiString::kHeaderSize); |
| __ Addu(string, |
| string, |
| SeqTwoByteString::kHeaderSize - kHeapObjectTag); |
| __ jmp(&check_encoding); |
| |
| // Handle external strings. |
| __ bind(&external_string); |
| if (FLAG_debug_code) { |
| // Assert that we do not have a cons or slice (indirect strings) here. |
| // Sequential strings have already been ruled out. |
| __ And(at, result, Operand(kIsIndirectStringMask)); |
| __ Assert(eq, "external string expected, but not found", |
| at, Operand(zero_reg)); |
| } |
| // Rule out short external strings. |
| STATIC_CHECK(kShortExternalStringTag != 0); |
| __ And(at, result, Operand(kShortExternalStringMask)); |
| __ Branch(call_runtime, ne, at, Operand(zero_reg)); |
| __ lw(string, FieldMemOperand(string, ExternalString::kResourceDataOffset)); |
| |
| Label ascii, done; |
| __ bind(&check_encoding); |
| STATIC_ASSERT(kTwoByteStringTag == 0); |
| __ And(at, result, Operand(kStringEncodingMask)); |
| __ Branch(&ascii, ne, at, Operand(zero_reg)); |
| // Two-byte string. |
| __ sll(at, index, 1); |
| __ Addu(at, string, at); |
| __ lhu(result, MemOperand(at)); |
| __ jmp(&done); |
| __ bind(&ascii); |
| // Ascii string. |
| __ Addu(at, string, index); |
| __ lbu(result, MemOperand(at)); |
| __ bind(&done); |
| } |
| |
| #undef __ |
| |
| } } // namespace v8::internal |
| |
| #endif // V8_TARGET_ARCH_MIPS |