diff options
Diffstat (limited to 'deps/v8/src/ic/arm/stub-cache-arm.cc')
-rw-r--r-- | deps/v8/src/ic/arm/stub-cache-arm.cc | 157 |
1 files changed, 0 insertions, 157 deletions
diff --git a/deps/v8/src/ic/arm/stub-cache-arm.cc b/deps/v8/src/ic/arm/stub-cache-arm.cc deleted file mode 100644 index b0f93e32dc..0000000000 --- a/deps/v8/src/ic/arm/stub-cache-arm.cc +++ /dev/null @@ -1,157 +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_ARM - -#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, Register scratch, Register scratch2, - Register offset_scratch) { - ExternalReference key_offset(stub_cache->key_reference(table)); - ExternalReference value_offset(stub_cache->value_reference(table)); - ExternalReference map_offset(stub_cache->map_reference(table)); - - uint32_t key_off_addr = reinterpret_cast<uint32_t>(key_offset.address()); - uint32_t value_off_addr = reinterpret_cast<uint32_t>(value_offset.address()); - uint32_t map_off_addr = reinterpret_cast<uint32_t>(map_offset.address()); - - // Check the relative positions of the address fields. - DCHECK(value_off_addr > key_off_addr); - DCHECK((value_off_addr - key_off_addr) % 4 == 0); - DCHECK((value_off_addr - key_off_addr) < (256 * 4)); - DCHECK(map_off_addr > key_off_addr); - DCHECK((map_off_addr - key_off_addr) % 4 == 0); - DCHECK((map_off_addr - key_off_addr) < (256 * 4)); - - Label miss; - Register base_addr = scratch; - scratch = no_reg; - - // Multiply by 3 because there are 3 fields per entry (name, code, map). - __ add(offset_scratch, offset, Operand(offset, LSL, 1)); - - // Calculate the base address of the entry. - __ add(base_addr, offset_scratch, Operand(key_offset)); - - // Check that the key in the entry matches the name. - __ ldr(ip, MemOperand(base_addr, 0)); - __ cmp(name, ip); - __ b(ne, &miss); - - // Check the map matches. - __ ldr(ip, MemOperand(base_addr, map_off_addr - key_off_addr)); - __ ldr(scratch2, FieldMemOperand(receiver, HeapObject::kMapOffset)); - __ cmp(ip, scratch2); - __ b(ne, &miss); - - // Get the code entry from the cache. - Register code = scratch2; - scratch2 = no_reg; - __ ldr(code, MemOperand(base_addr, value_off_addr - key_off_addr)); - -#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(pc, code, Operand(Code::kHeaderSize - kHeapObjectTag)); - - // Miss: fall through. - __ bind(&miss); -} - -void StubCache::GenerateProbe(MacroAssembler* masm, Register receiver, - Register name, Register scratch, Register extra, - Register extra2, Register extra3) { - Label miss; - - // Make sure that code is valid. The multiplying code relies on the - // entry size being 12. - DCHECK(sizeof(Entry) == 12); - - // Make sure that there are no register conflicts. - DCHECK(!AreAliased(receiver, name, scratch, extra, extra2, extra3)); - - // Check scratch, extra and extra2 registers are valid. - DCHECK(!scratch.is(no_reg)); - DCHECK(!extra.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, extra, extra2 and - // extra3 don't conflict with the vector and slot registers, which need - // to be preserved for a handler call or miss. - if (IC::ICUseVector(ic_kind_)) { - Register vector, slot; - if (ic_kind_ == Code::STORE_IC || ic_kind_ == Code::KEYED_STORE_IC) { - vector = StoreWithVectorDescriptor::VectorRegister(); - slot = StoreWithVectorDescriptor::SlotRegister(); - } else { - DCHECK(ic_kind_ == Code::LOAD_IC || ic_kind_ == Code::KEYED_LOAD_IC); - vector = LoadWithVectorDescriptor::VectorRegister(); - slot = LoadWithVectorDescriptor::SlotRegister(); - } - DCHECK(!AreAliased(vector, slot, scratch, extra, extra2, extra3)); - } -#endif - - Counters* counters = masm->isolate()->counters(); - __ IncrementCounter(counters->megamorphic_stub_cache_probes(), 1, extra2, - extra3); - - // Check that the receiver isn't a smi. - __ JumpIfSmi(receiver, &miss); - - // Get the map of the receiver and compute the hash. - __ ldr(scratch, FieldMemOperand(name, Name::kHashFieldOffset)); - __ ldr(ip, FieldMemOperand(receiver, HeapObject::kMapOffset)); - __ add(scratch, scratch, Operand(ip)); - __ eor(scratch, scratch, Operand(kPrimaryMagic)); - __ mov(ip, Operand(kPrimaryTableSize - 1)); - __ and_(scratch, scratch, Operand(ip, LSL, kCacheIndexShift)); - - // Probe the primary table. - ProbeTable(this, masm, kPrimary, receiver, name, scratch, extra, extra2, - extra3); - - // Primary miss: Compute hash for secondary probe. - __ sub(scratch, scratch, Operand(name)); - __ add(scratch, scratch, Operand(kSecondaryMagic)); - __ mov(ip, Operand(kSecondaryTableSize - 1)); - __ and_(scratch, scratch, Operand(ip, LSL, kCacheIndexShift)); - - // Probe the secondary table. - ProbeTable(this, masm, kSecondary, receiver, name, scratch, extra, extra2, - extra3); - - // Cache miss: Fall-through and let caller handle the miss by - // entering the runtime system. - __ bind(&miss); - __ IncrementCounter(counters->megamorphic_stub_cache_misses(), 1, extra2, - extra3); -} - - -#undef __ -} // namespace internal -} // namespace v8 - -#endif // V8_TARGET_ARCH_ARM |