Beings adding SIMD support to arm64.

runtime/vm/assembler_arm64.cc

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_ARM64)
 
 #include "vm/assembler.h"
 #include "vm/cpu.h"
 #include "vm/longjump.h"
@@ skipping 1209 matching lines @@
 
 void Assembler::LeaveStubFrame() {
   // Restore and untag PP.
   LoadFromOffset(PP, FP, kSavedCallerPpSlotFromFp * kWordSize, kNoPP);
   sub(PP, PP, Operand(kHeapObjectTag));
   LeaveFrame();
 }
 
 
 void Assembler::UpdateAllocationStats(intptr_t cid,
-                                      Register temp_reg,
                                       Register pp,
                                       Heap::Space space) {
-  ASSERT(temp_reg != kNoRegister);
-  ASSERT(temp_reg != TMP);
   ASSERT(cid > 0);
   Isolate* isolate = Isolate::Current();
   ClassTable* class_table = isolate->class_table();
   if (cid < kNumPredefinedCids) {
     const uword class_heap_stats_table_address =
         class_table->PredefinedClassHeapStatsTableAddress();
     const uword class_offset = cid * sizeof(ClassHeapStats);  // NOLINT
     const uword count_field_offset = (space == Heap::kNew) ?
       ClassHeapStats::allocated_since_gc_new_space_offset() :
       ClassHeapStats::allocated_since_gc_old_space_offset();
-    LoadImmediate(temp_reg, class_heap_stats_table_address + class_offset, pp);
-    const Address& count_address = Address(temp_reg, count_field_offset);
+    LoadImmediate(TMP2, class_heap_stats_table_address + class_offset, pp);
+    const Address& count_address = Address(TMP2, count_field_offset);
     ldr(TMP, count_address);
     AddImmediate(TMP, TMP, 1, pp);
     str(TMP, count_address);
   } else {
-    ASSERT(temp_reg != kNoRegister);
     const uword class_offset = cid * sizeof(ClassHeapStats);  // NOLINT
     const uword count_field_offset = (space == Heap::kNew) ?
       ClassHeapStats::allocated_since_gc_new_space_offset() :
       ClassHeapStats::allocated_since_gc_old_space_offset();
-    LoadImmediate(temp_reg, class_table->ClassStatsTableAddress(), pp);
-    ldr(temp_reg, Address(temp_reg));
-    AddImmediate(temp_reg, temp_reg, class_offset, pp);
-    ldr(TMP, Address(temp_reg, count_field_offset));
+    LoadImmediate(TMP2, class_table->ClassStatsTableAddress(), pp);
+    ldr(TMP, Address(TMP2));
+    AddImmediate(TMP2, TMP, class_offset, pp);
+    ldr(TMP, Address(TMP2, count_field_offset));
     AddImmediate(TMP, TMP, 1, pp);
-    str(TMP, Address(temp_reg, count_field_offset));
+    str(TMP, Address(TMP2, count_field_offset));
   }
 }
 
 
 void Assembler::UpdateAllocationStatsWithSize(intptr_t cid,
                                               Register size_reg,
-                                              Register temp_reg,
                                               Register pp,
                                               Heap::Space space) {
-  ASSERT(temp_reg != kNoRegister);
-  ASSERT(temp_reg != TMP);
   ASSERT(cid > 0);
   Isolate* isolate = Isolate::Current();
   ClassTable* class_table = isolate->class_table();
   if (cid < kNumPredefinedCids) {
     const uword class_heap_stats_table_address =
         class_table->PredefinedClassHeapStatsTableAddress();
     const uword class_offset = cid * sizeof(ClassHeapStats);  // NOLINT
     const uword count_field_offset = (space == Heap::kNew) ?
       ClassHeapStats::allocated_since_gc_new_space_offset() :
       ClassHeapStats::allocated_since_gc_old_space_offset();
     const uword size_field_offset = (space == Heap::kNew) ?
       ClassHeapStats::allocated_size_since_gc_new_space_offset() :
       ClassHeapStats::allocated_size_since_gc_old_space_offset();
-    LoadImmediate(temp_reg, class_heap_stats_table_address + class_offset, pp);
-    const Address& count_address = Address(temp_reg, count_field_offset);
-    const Address& size_address = Address(temp_reg, size_field_offset);
+    LoadImmediate(TMP2, class_heap_stats_table_address + class_offset, pp);
+    const Address& count_address = Address(TMP2, count_field_offset);
+    const Address& size_address = Address(TMP2, size_field_offset);
     ldr(TMP, count_address);
     AddImmediate(TMP, TMP, 1, pp);
     str(TMP, count_address);
     ldr(TMP, size_address);
     add(TMP, TMP, Operand(size_reg));
     str(TMP, size_address);
   } else {
-    ASSERT(temp_reg != kNoRegister);
     const uword class_offset = cid * sizeof(ClassHeapStats);  // NOLINT
     const uword count_field_offset = (space == Heap::kNew) ?
       ClassHeapStats::allocated_since_gc_new_space_offset() :
       ClassHeapStats::allocated_since_gc_old_space_offset();
     const uword size_field_offset = (space == Heap::kNew) ?
       ClassHeapStats::allocated_size_since_gc_new_space_offset() :
       ClassHeapStats::allocated_size_since_gc_old_space_offset();
-    LoadImmediate(temp_reg, class_table->ClassStatsTableAddress(), pp);
-    ldr(temp_reg, Address(temp_reg));
-    AddImmediate(temp_reg, temp_reg, class_offset, pp);
-    ldr(TMP, Address(temp_reg, count_field_offset));
+    LoadImmediate(TMP2, class_table->ClassStatsTableAddress(), pp);
+    ldr(TMP, Address(TMP2));
+    AddImmediate(TMP2, TMP, class_offset, pp);
+    ldr(TMP, Address(TMP2, count_field_offset));
     AddImmediate(TMP, TMP, 1, pp);
-    str(TMP, Address(temp_reg, count_field_offset));
-    ldr(TMP, Address(temp_reg, size_field_offset));
+    str(TMP, Address(TMP2, count_field_offset));
+    ldr(TMP, Address(TMP2, size_field_offset));
     add(TMP, TMP, Operand(size_reg));
-    str(TMP, Address(temp_reg, size_field_offset));
+    str(TMP, Address(TMP2, size_field_offset));
   }
 }
 
 
 void Assembler::TryAllocate(const Class& cls,
                             Label* failure,
                             Register instance_reg,
-                            Register temp_reg,
                             Register pp) {
   ASSERT(failure != NULL);
   if (FLAG_inline_alloc) {
     Heap* heap = Isolate::Current()->heap();
     const intptr_t instance_size = cls.instance_size();
     LoadImmediate(instance_reg, heap->TopAddress(), pp);
     ldr(instance_reg, Address(instance_reg));
     AddImmediate(instance_reg, instance_reg, instance_size, pp);
 
     // instance_reg: potential next object start.
     LoadImmediate(TMP, heap->EndAddress(), pp);
     ldr(TMP, Address(TMP));
     CompareRegisters(TMP, instance_reg);
     // fail if heap end unsigned less than or equal to instance_reg.
     b(failure, LS);
 
     // Successfully allocated the object, now update top to point to
     // next object start and store the class in the class field of object.
     LoadImmediate(TMP, heap->TopAddress(), pp);
     str(instance_reg, Address(TMP));
 
     ASSERT(instance_size >= kHeapObjectTag);
     AddImmediate(
         instance_reg, instance_reg, -instance_size + kHeapObjectTag, pp);
-    UpdateAllocationStats(cls.id(), temp_reg, pp);
+    UpdateAllocationStats(cls.id(), pp);
 
     uword tags = 0;
     tags = RawObject::SizeTag::update(instance_size, tags);
     ASSERT(cls.id() != kIllegalCid);
     tags = RawObject::ClassIdTag::update(cls.id(), tags);
     LoadImmediate(TMP, tags, pp);
     StoreFieldToOffset(TMP, instance_reg, Object::tags_offset(), pp);
   } else {
     b(failure);
   }
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM64