diff options
Diffstat (limited to 'deps/v8/src/ic/x64/stub-cache-x64.cc')
-rw-r--r-- | deps/v8/src/ic/x64/stub-cache-x64.cc | 153 |
1 files changed, 0 insertions, 153 deletions
diff --git a/deps/v8/src/ic/x64/stub-cache-x64.cc b/deps/v8/src/ic/x64/stub-cache-x64.cc deleted file mode 100644 index 946aee51fc..0000000000 --- a/deps/v8/src/ic/x64/stub-cache-x64.cc +++ /dev/null @@ -1,153 +0,0 @@ -// 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. - -#if V8_TARGET_ARCH_X64 - -#include "src/codegen.h" -#include "src/ic/ic.h" -#include "src/ic/stub-cache.h" -#include "src/interface-descriptors.h" - -namespace v8 { -namespace internal { - -#define __ ACCESS_MASM(masm) - -static void ProbeTable(StubCache* stub_cache, MacroAssembler* masm, - StubCache::Table table, Register receiver, Register name, - // The offset is scaled by 4, based on - // kCacheIndexShift, which is two bits - Register offset) { - // We need to scale up the pointer by 2 when the offset is scaled by less - // than the pointer size. - DCHECK(kPointerSize == kInt64Size - ? kPointerSizeLog2 == StubCache::kCacheIndexShift + 1 - : kPointerSizeLog2 == StubCache::kCacheIndexShift); - ScaleFactor scale_factor = kPointerSize == kInt64Size ? times_2 : times_1; - - DCHECK_EQ(3u * kPointerSize, sizeof(StubCache::Entry)); - // The offset register holds the entry offset times four (due to masking - // and shifting optimizations). - ExternalReference key_offset(stub_cache->key_reference(table)); - ExternalReference value_offset(stub_cache->value_reference(table)); - Label miss; - - // Multiply by 3 because there are 3 fields per entry (name, code, map). - __ leap(offset, Operand(offset, offset, times_2, 0)); - - __ LoadAddress(kScratchRegister, key_offset); - - // Check that the key in the entry matches the name. - __ cmpp(name, Operand(kScratchRegister, offset, scale_factor, 0)); - __ j(not_equal, &miss); - - // Get the map entry from the cache. - // Use key_offset + kPointerSize * 2, rather than loading map_offset. - DCHECK(stub_cache->map_reference(table).address() - - stub_cache->key_reference(table).address() == - kPointerSize * 2); - __ movp(kScratchRegister, - Operand(kScratchRegister, offset, scale_factor, kPointerSize * 2)); - __ cmpp(kScratchRegister, FieldOperand(receiver, HeapObject::kMapOffset)); - __ j(not_equal, &miss); - - // Get the code entry from the cache. - __ LoadAddress(kScratchRegister, value_offset); - __ movp(kScratchRegister, Operand(kScratchRegister, offset, scale_factor, 0)); - -#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. - __ addp(kScratchRegister, Immediate(Code::kHeaderSize - kHeapObjectTag)); - __ jmp(kScratchRegister); - - __ bind(&miss); -} - -void StubCache::GenerateProbe(MacroAssembler* masm, Register receiver, - Register name, Register scratch, Register extra, - Register extra2, Register extra3) { - Label miss; - USE(extra); // The register extra is not used on the X64 platform. - USE(extra2); // The register extra2 is not used on the X64 platform. - USE(extra3); // The register extra2 is not used on the X64 platform. - // Make sure that code is valid. The multiplying code relies on the - // entry size being 3 * kPointerSize. - DCHECK(sizeof(Entry) == 3 * kPointerSize); - - // Make sure that there are no register conflicts. - DCHECK(!scratch.is(receiver)); - DCHECK(!scratch.is(name)); - - // Check scratch register is valid, extra and extra2 are unused. - DCHECK(!scratch.is(no_reg)); - DCHECK(extra2.is(no_reg)); - DCHECK(extra3.is(no_reg)); - -#ifdef DEBUG - // If vector-based ics are in use, ensure that scratch doesn't conflict with - // the vector and slot registers, which need to be preserved for a handler - // call or miss. - if (IC::ICUseVector(ic_kind_)) { - if (ic_kind_ == Code::LOAD_IC || ic_kind_ == Code::KEYED_LOAD_IC) { - Register vector = LoadWithVectorDescriptor::VectorRegister(); - Register slot = LoadDescriptor::SlotRegister(); - DCHECK(!AreAliased(vector, slot, scratch)); - } else { - DCHECK(ic_kind_ == Code::STORE_IC || ic_kind_ == Code::KEYED_STORE_IC); - Register vector = StoreWithVectorDescriptor::VectorRegister(); - Register slot = StoreWithVectorDescriptor::SlotRegister(); - DCHECK(!AreAliased(vector, slot, scratch)); - } - } -#endif - - 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. - __ movl(scratch, FieldOperand(name, Name::kHashFieldOffset)); - // Use only the low 32 bits of the map pointer. - __ addl(scratch, FieldOperand(receiver, HeapObject::kMapOffset)); - __ xorp(scratch, Immediate(kPrimaryMagic)); - // 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. - __ andp(scratch, Immediate((kPrimaryTableSize - 1) << kCacheIndexShift)); - - // Probe the primary table. - ProbeTable(this, masm, kPrimary, receiver, name, scratch); - - // Primary miss: Compute hash for secondary probe. - __ movl(scratch, FieldOperand(name, Name::kHashFieldOffset)); - __ addl(scratch, FieldOperand(receiver, HeapObject::kMapOffset)); - __ xorp(scratch, Immediate(kPrimaryMagic)); - __ andp(scratch, Immediate((kPrimaryTableSize - 1) << kCacheIndexShift)); - __ subl(scratch, name); - __ addl(scratch, Immediate(kSecondaryMagic)); - __ andp(scratch, Immediate((kSecondaryTableSize - 1) << kCacheIndexShift)); - - // Probe the secondary table. - ProbeTable(this, masm, kSecondary, receiver, name, scratch); - - // 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 internal -} // namespace v8 - -#endif // V8_TARGET_ARCH_X64 |