Move IC code into a subdir and move ic-compilation related code from stub-cache into ic-compiler

src/ic/ia32/stub-cache-ia32.cc

+// Copyright 2012 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "src/v8.h"
+
+#if V8_TARGET_ARCH_IA32
+
+#include "src/codegen.h"
+#include "src/ic/stub-cache.h"
+
+namespace v8 {
+namespace internal {
+
+#define __ ACCESS_MASM(masm)
+
+
+static void ProbeTable(Isolate* isolate, MacroAssembler* masm,
+                       Code::Flags flags, StubCache::Table table, Register name,
+                       Register receiver,
+                       // Number of the cache entry pointer-size scaled.
+                       Register offset, Register extra) {
+  ExternalReference key_offset(isolate->stub_cache()->key_reference(table));
+  ExternalReference value_offset(isolate->stub_cache()->value_reference(table));
+  ExternalReference map_offset(isolate->stub_cache()->map_reference(table));
+
+  Label miss;
+
+  // Multiply by 3 because there are 3 fields per entry (name, code, map).
+  __ lea(offset, Operand(offset, offset, times_2, 0));
+
+  if (extra.is_valid()) {
+    // Get the code entry from the cache.
+    __ mov(extra, Operand::StaticArray(offset, times_1, value_offset));
+
+    // Check that the key in the entry matches the name.
+    __ cmp(name, Operand::StaticArray(offset, times_1, key_offset));
+    __ j(not_equal, &miss);
+
+    // Check the map matches.
+    __ mov(offset, Operand::StaticArray(offset, times_1, map_offset));
+    __ cmp(offset, FieldOperand(receiver, HeapObject::kMapOffset));
+    __ j(not_equal, &miss);
+
+    // Check that the flags match what we're looking for.
+    __ mov(offset, FieldOperand(extra, Code::kFlagsOffset));
+    __ and_(offset, ~Code::kFlagsNotUsedInLookup);
+    __ cmp(offset, flags);
+    __ j(not_equal, &miss);
+
+#ifdef DEBUG
+    if (FLAG_test_secondary_stub_cache && table == StubCache::kPrimary) {
+      __ jmp(&miss);
+    } else if (FLAG_test_primary_stub_cache && table == StubCache::kSecondary) {
+      __ jmp(&miss);
+    }
+#endif
+
+    // Jump to the first instruction in the code stub.
+    __ add(extra, Immediate(Code::kHeaderSize - kHeapObjectTag));
+    __ jmp(extra);
+
+    __ bind(&miss);
+  } else {
+    // Save the offset on the stack.
+    __ push(offset);
+
+    // Check that the key in the entry matches the name.
+    __ cmp(name, Operand::StaticArray(offset, times_1, key_offset));
+    __ j(not_equal, &miss);
+
+    // Check the map matches.
+    __ mov(offset, Operand::StaticArray(offset, times_1, map_offset));
+    __ cmp(offset, FieldOperand(receiver, HeapObject::kMapOffset));
+    __ j(not_equal, &miss);
+
+    // Restore offset register.
+    __ mov(offset, Operand(esp, 0));
+
+    // Get the code entry from the cache.
+    __ mov(offset, Operand::StaticArray(offset, times_1, value_offset));
+
+    // Check that the flags match what we're looking for.
+    __ mov(offset, FieldOperand(offset, Code::kFlagsOffset));
+    __ and_(offset, ~Code::kFlagsNotUsedInLookup);
+    __ cmp(offset, flags);
+    __ j(not_equal, &miss);
+
+#ifdef DEBUG
+    if (FLAG_test_secondary_stub_cache && table == StubCache::kPrimary) {
+      __ jmp(&miss);
+    } else if (FLAG_test_primary_stub_cache && table == StubCache::kSecondary) {
+      __ jmp(&miss);
+    }
+#endif
+
+    // Restore offset and re-load code entry from cache.
+    __ pop(offset);
+    __ mov(offset, Operand::StaticArray(offset, times_1, value_offset));
+
+    // Jump to the first instruction in the code stub.
+    __ add(offset, Immediate(Code::kHeaderSize - kHeapObjectTag));
+    __ jmp(offset);
+
+    // Pop at miss.
+    __ bind(&miss);
+    __ pop(offset);
+  }
+}
+
+
+void StubCache::GenerateProbe(MacroAssembler* masm, Code::Flags flags,
+                              Register receiver, Register name,
+                              Register scratch, Register extra, Register extra2,
+                              Register extra3) {
+  Label miss;
+
+  // Assert that code is valid.  The multiplying code relies on the entry size
+  // being 12.
+  DCHECK(sizeof(Entry) == 12);
+
+  // Assert the flags do not name a specific type.
+  DCHECK(Code::ExtractTypeFromFlags(flags) == 0);
+
+  // Assert that there are no register conflicts.
+  DCHECK(!scratch.is(receiver));
+  DCHECK(!scratch.is(name));
+  DCHECK(!extra.is(receiver));
+  DCHECK(!extra.is(name));
+  DCHECK(!extra.is(scratch));
+
+  // Assert scratch and extra registers are valid, and extra2/3 are unused.
+  DCHECK(!scratch.is(no_reg));
+  DCHECK(extra2.is(no_reg));
+  DCHECK(extra3.is(no_reg));
+
+  Register offset = scratch;
+  scratch = no_reg;
+
+  Counters* counters = masm->isolate()->counters();
+  __ IncrementCounter(counters->megamorphic_stub_cache_probes(), 1);
+
+  // Check that the receiver isn't a smi.
+  __ JumpIfSmi(receiver, &miss);
+
+  // Get the map of the receiver and compute the hash.
+  __ mov(offset, FieldOperand(name, Name::kHashFieldOffset));
+  __ add(offset, FieldOperand(receiver, HeapObject::kMapOffset));
+  __ xor_(offset, flags);
+  // We mask out the last two bits because they are not part of the hash and
+  // they are always 01 for maps.  Also in the two 'and' instructions below.
+  __ and_(offset, (kPrimaryTableSize - 1) << kCacheIndexShift);
+  // ProbeTable expects the offset to be pointer scaled, which it is, because
+  // the heap object tag size is 2 and the pointer size log 2 is also 2.
+  DCHECK(kCacheIndexShift == kPointerSizeLog2);
+
+  // Probe the primary table.
+  ProbeTable(isolate(), masm, flags, kPrimary, name, receiver, offset, extra);
+
+  // Primary miss: Compute hash for secondary probe.
+  __ mov(offset, FieldOperand(name, Name::kHashFieldOffset));
+  __ add(offset, FieldOperand(receiver, HeapObject::kMapOffset));
+  __ xor_(offset, flags);
+  __ and_(offset, (kPrimaryTableSize - 1) << kCacheIndexShift);
+  __ sub(offset, name);
+  __ add(offset, Immediate(flags));
+  __ and_(offset, (kSecondaryTableSize - 1) << kCacheIndexShift);
+
+  // Probe the secondary table.
+  ProbeTable(isolate(), masm, flags, kSecondary, name, receiver, offset, extra);
+
+  // Cache miss: Fall-through and let caller handle the miss by
+  // entering the runtime system.
+  __ bind(&miss);
+  __ IncrementCounter(counters->megamorphic_stub_cache_misses(), 1);
+}
+
+
+#undef __
+}
+}  // namespace v8::internal
+
+#endif  // V8_TARGET_ARCH_IA32