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Unified Diff: src/mips/codegen-mips.cc

Issue 8404030: Version 3.7.1 (Closed) Base URL: http://v8.googlecode.com/svn/trunk/
Patch Set: Created 9 years, 2 months ago
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Index: src/mips/codegen-mips.cc
===================================================================
--- src/mips/codegen-mips.cc (revision 9808)
+++ src/mips/codegen-mips.cc (working copy)
@@ -30,10 +30,13 @@
#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.
@@ -50,7 +53,261 @@
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);
+ __ 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);
+}
+
+#undef __
+
} } // namespace v8::internal
#endif // V8_TARGET_ARCH_MIPS
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