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887 lines
34 KiB
887 lines
34 KiB
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "jni_macro_assembler_arm64.h"
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#include "entrypoints/quick/quick_entrypoints.h"
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#include "managed_register_arm64.h"
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#include "offsets.h"
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#include "thread.h"
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using namespace vixl::aarch64; // NOLINT(build/namespaces)
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namespace art {
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namespace arm64 {
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#ifdef ___
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#error "ARM64 Assembler macro already defined."
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#else
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#define ___ asm_.GetVIXLAssembler()->
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#endif
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#define reg_x(X) Arm64Assembler::reg_x(X)
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#define reg_w(W) Arm64Assembler::reg_w(W)
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#define reg_d(D) Arm64Assembler::reg_d(D)
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#define reg_s(S) Arm64Assembler::reg_s(S)
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// The AAPCS64 requires 16-byte alignement. This is the same as the Managed ABI stack alignment.
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static constexpr size_t kAapcs64StackAlignment = 16u;
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static_assert(kAapcs64StackAlignment == kStackAlignment);
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Arm64JNIMacroAssembler::~Arm64JNIMacroAssembler() {
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}
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void Arm64JNIMacroAssembler::FinalizeCode() {
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for (const std::unique_ptr<Arm64Exception>& exception : exception_blocks_) {
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EmitExceptionPoll(exception.get());
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}
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___ FinalizeCode();
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}
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void Arm64JNIMacroAssembler::GetCurrentThread(ManagedRegister dest) {
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___ Mov(reg_x(dest.AsArm64().AsXRegister()), reg_x(TR));
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}
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void Arm64JNIMacroAssembler::GetCurrentThread(FrameOffset offset) {
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StoreToOffset(TR, SP, offset.Int32Value());
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}
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// See Arm64 PCS Section 5.2.2.1.
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void Arm64JNIMacroAssembler::IncreaseFrameSize(size_t adjust) {
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if (adjust != 0u) {
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CHECK_ALIGNED(adjust, kStackAlignment);
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AddConstant(SP, -adjust);
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cfi().AdjustCFAOffset(adjust);
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}
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}
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// See Arm64 PCS Section 5.2.2.1.
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void Arm64JNIMacroAssembler::DecreaseFrameSize(size_t adjust) {
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if (adjust != 0u) {
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CHECK_ALIGNED(adjust, kStackAlignment);
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AddConstant(SP, adjust);
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cfi().AdjustCFAOffset(-adjust);
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}
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}
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void Arm64JNIMacroAssembler::AddConstant(XRegister rd, int32_t value, Condition cond) {
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AddConstant(rd, rd, value, cond);
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}
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void Arm64JNIMacroAssembler::AddConstant(XRegister rd,
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XRegister rn,
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int32_t value,
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Condition cond) {
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if ((cond == al) || (cond == nv)) {
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// VIXL macro-assembler handles all variants.
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___ Add(reg_x(rd), reg_x(rn), value);
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} else {
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// temp = rd + value
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// rd = cond ? temp : rn
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UseScratchRegisterScope temps(asm_.GetVIXLAssembler());
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temps.Exclude(reg_x(rd), reg_x(rn));
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Register temp = temps.AcquireX();
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___ Add(temp, reg_x(rn), value);
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___ Csel(reg_x(rd), temp, reg_x(rd), cond);
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}
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}
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void Arm64JNIMacroAssembler::StoreWToOffset(StoreOperandType type,
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WRegister source,
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XRegister base,
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int32_t offset) {
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switch (type) {
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case kStoreByte:
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___ Strb(reg_w(source), MEM_OP(reg_x(base), offset));
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break;
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case kStoreHalfword:
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___ Strh(reg_w(source), MEM_OP(reg_x(base), offset));
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break;
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case kStoreWord:
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___ Str(reg_w(source), MEM_OP(reg_x(base), offset));
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break;
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default:
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LOG(FATAL) << "UNREACHABLE";
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}
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}
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void Arm64JNIMacroAssembler::StoreToOffset(XRegister source, XRegister base, int32_t offset) {
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CHECK_NE(source, SP);
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___ Str(reg_x(source), MEM_OP(reg_x(base), offset));
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}
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void Arm64JNIMacroAssembler::StoreSToOffset(SRegister source, XRegister base, int32_t offset) {
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___ Str(reg_s(source), MEM_OP(reg_x(base), offset));
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}
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void Arm64JNIMacroAssembler::StoreDToOffset(DRegister source, XRegister base, int32_t offset) {
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___ Str(reg_d(source), MEM_OP(reg_x(base), offset));
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}
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void Arm64JNIMacroAssembler::Store(FrameOffset offs, ManagedRegister m_src, size_t size) {
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Arm64ManagedRegister src = m_src.AsArm64();
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if (src.IsNoRegister()) {
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CHECK_EQ(0u, size);
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} else if (src.IsWRegister()) {
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CHECK_EQ(4u, size);
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StoreWToOffset(kStoreWord, src.AsWRegister(), SP, offs.Int32Value());
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} else if (src.IsXRegister()) {
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CHECK_EQ(8u, size);
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StoreToOffset(src.AsXRegister(), SP, offs.Int32Value());
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} else if (src.IsSRegister()) {
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StoreSToOffset(src.AsSRegister(), SP, offs.Int32Value());
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} else {
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CHECK(src.IsDRegister()) << src;
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StoreDToOffset(src.AsDRegister(), SP, offs.Int32Value());
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}
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}
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void Arm64JNIMacroAssembler::StoreRef(FrameOffset offs, ManagedRegister m_src) {
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Arm64ManagedRegister src = m_src.AsArm64();
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CHECK(src.IsXRegister()) << src;
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StoreWToOffset(kStoreWord, src.AsOverlappingWRegister(), SP,
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offs.Int32Value());
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}
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void Arm64JNIMacroAssembler::StoreRawPtr(FrameOffset offs, ManagedRegister m_src) {
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Arm64ManagedRegister src = m_src.AsArm64();
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CHECK(src.IsXRegister()) << src;
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StoreToOffset(src.AsXRegister(), SP, offs.Int32Value());
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}
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void Arm64JNIMacroAssembler::StoreImmediateToFrame(FrameOffset offs, uint32_t imm) {
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UseScratchRegisterScope temps(asm_.GetVIXLAssembler());
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Register scratch = temps.AcquireW();
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___ Mov(scratch, imm);
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___ Str(scratch, MEM_OP(reg_x(SP), offs.Int32Value()));
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}
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void Arm64JNIMacroAssembler::StoreStackOffsetToThread(ThreadOffset64 tr_offs, FrameOffset fr_offs) {
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UseScratchRegisterScope temps(asm_.GetVIXLAssembler());
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Register scratch = temps.AcquireX();
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___ Add(scratch, reg_x(SP), fr_offs.Int32Value());
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___ Str(scratch, MEM_OP(reg_x(TR), tr_offs.Int32Value()));
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}
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void Arm64JNIMacroAssembler::StoreStackPointerToThread(ThreadOffset64 tr_offs) {
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UseScratchRegisterScope temps(asm_.GetVIXLAssembler());
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Register scratch = temps.AcquireX();
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___ Mov(scratch, reg_x(SP));
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___ Str(scratch, MEM_OP(reg_x(TR), tr_offs.Int32Value()));
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}
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void Arm64JNIMacroAssembler::StoreSpanning(FrameOffset dest_off ATTRIBUTE_UNUSED,
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ManagedRegister m_source ATTRIBUTE_UNUSED,
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FrameOffset in_off ATTRIBUTE_UNUSED) {
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UNIMPLEMENTED(FATAL); // This case is not applicable to ARM64.
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}
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// Load routines.
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void Arm64JNIMacroAssembler::LoadImmediate(XRegister dest, int32_t value, Condition cond) {
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if ((cond == al) || (cond == nv)) {
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___ Mov(reg_x(dest), value);
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} else {
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// temp = value
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// rd = cond ? temp : rd
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if (value != 0) {
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UseScratchRegisterScope temps(asm_.GetVIXLAssembler());
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temps.Exclude(reg_x(dest));
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Register temp = temps.AcquireX();
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___ Mov(temp, value);
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___ Csel(reg_x(dest), temp, reg_x(dest), cond);
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} else {
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___ Csel(reg_x(dest), reg_x(XZR), reg_x(dest), cond);
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}
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}
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}
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void Arm64JNIMacroAssembler::LoadWFromOffset(LoadOperandType type,
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WRegister dest,
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XRegister base,
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int32_t offset) {
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switch (type) {
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case kLoadSignedByte:
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___ Ldrsb(reg_w(dest), MEM_OP(reg_x(base), offset));
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break;
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case kLoadSignedHalfword:
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___ Ldrsh(reg_w(dest), MEM_OP(reg_x(base), offset));
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break;
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case kLoadUnsignedByte:
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___ Ldrb(reg_w(dest), MEM_OP(reg_x(base), offset));
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break;
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case kLoadUnsignedHalfword:
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___ Ldrh(reg_w(dest), MEM_OP(reg_x(base), offset));
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break;
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case kLoadWord:
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___ Ldr(reg_w(dest), MEM_OP(reg_x(base), offset));
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break;
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default:
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LOG(FATAL) << "UNREACHABLE";
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}
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}
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// Note: We can extend this member by adding load type info - see
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// sign extended A64 load variants.
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void Arm64JNIMacroAssembler::LoadFromOffset(XRegister dest, XRegister base, int32_t offset) {
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CHECK_NE(dest, SP);
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___ Ldr(reg_x(dest), MEM_OP(reg_x(base), offset));
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}
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void Arm64JNIMacroAssembler::LoadSFromOffset(SRegister dest, XRegister base, int32_t offset) {
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___ Ldr(reg_s(dest), MEM_OP(reg_x(base), offset));
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}
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void Arm64JNIMacroAssembler::LoadDFromOffset(DRegister dest, XRegister base, int32_t offset) {
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___ Ldr(reg_d(dest), MEM_OP(reg_x(base), offset));
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}
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void Arm64JNIMacroAssembler::Load(Arm64ManagedRegister dest,
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XRegister base,
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int32_t offset,
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size_t size) {
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if (dest.IsNoRegister()) {
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CHECK_EQ(0u, size) << dest;
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} else if (dest.IsWRegister()) {
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CHECK_EQ(4u, size) << dest;
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___ Ldr(reg_w(dest.AsWRegister()), MEM_OP(reg_x(base), offset));
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} else if (dest.IsXRegister()) {
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CHECK_NE(dest.AsXRegister(), SP) << dest;
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if (size == 1u) {
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___ Ldrb(reg_w(dest.AsOverlappingWRegister()), MEM_OP(reg_x(base), offset));
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} else if (size == 4u) {
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___ Ldr(reg_w(dest.AsOverlappingWRegister()), MEM_OP(reg_x(base), offset));
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} else {
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CHECK_EQ(8u, size) << dest;
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___ Ldr(reg_x(dest.AsXRegister()), MEM_OP(reg_x(base), offset));
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}
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} else if (dest.IsSRegister()) {
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___ Ldr(reg_s(dest.AsSRegister()), MEM_OP(reg_x(base), offset));
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} else {
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CHECK(dest.IsDRegister()) << dest;
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___ Ldr(reg_d(dest.AsDRegister()), MEM_OP(reg_x(base), offset));
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}
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}
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void Arm64JNIMacroAssembler::Load(ManagedRegister m_dst, FrameOffset src, size_t size) {
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return Load(m_dst.AsArm64(), SP, src.Int32Value(), size);
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}
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void Arm64JNIMacroAssembler::LoadFromThread(ManagedRegister m_dst,
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ThreadOffset64 src,
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size_t size) {
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return Load(m_dst.AsArm64(), TR, src.Int32Value(), size);
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}
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void Arm64JNIMacroAssembler::LoadRef(ManagedRegister m_dst, FrameOffset offs) {
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Arm64ManagedRegister dst = m_dst.AsArm64();
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CHECK(dst.IsXRegister()) << dst;
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LoadWFromOffset(kLoadWord, dst.AsOverlappingWRegister(), SP, offs.Int32Value());
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}
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void Arm64JNIMacroAssembler::LoadRef(ManagedRegister m_dst,
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ManagedRegister m_base,
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MemberOffset offs,
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bool unpoison_reference) {
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Arm64ManagedRegister dst = m_dst.AsArm64();
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Arm64ManagedRegister base = m_base.AsArm64();
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CHECK(dst.IsXRegister() && base.IsXRegister());
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LoadWFromOffset(kLoadWord, dst.AsOverlappingWRegister(), base.AsXRegister(),
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offs.Int32Value());
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if (unpoison_reference) {
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WRegister ref_reg = dst.AsOverlappingWRegister();
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asm_.MaybeUnpoisonHeapReference(reg_w(ref_reg));
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}
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}
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void Arm64JNIMacroAssembler::LoadRawPtr(ManagedRegister m_dst,
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ManagedRegister m_base,
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Offset offs) {
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Arm64ManagedRegister dst = m_dst.AsArm64();
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Arm64ManagedRegister base = m_base.AsArm64();
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CHECK(dst.IsXRegister() && base.IsXRegister());
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// Remove dst and base form the temp list - higher level API uses IP1, IP0.
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UseScratchRegisterScope temps(asm_.GetVIXLAssembler());
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temps.Exclude(reg_x(dst.AsXRegister()), reg_x(base.AsXRegister()));
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___ Ldr(reg_x(dst.AsXRegister()), MEM_OP(reg_x(base.AsXRegister()), offs.Int32Value()));
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}
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void Arm64JNIMacroAssembler::LoadRawPtrFromThread(ManagedRegister m_dst, ThreadOffset64 offs) {
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Arm64ManagedRegister dst = m_dst.AsArm64();
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CHECK(dst.IsXRegister()) << dst;
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LoadFromOffset(dst.AsXRegister(), TR, offs.Int32Value());
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}
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// Copying routines.
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void Arm64JNIMacroAssembler::MoveArguments(ArrayRef<ArgumentLocation> dests,
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ArrayRef<ArgumentLocation> srcs) {
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DCHECK_EQ(dests.size(), srcs.size());
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auto get_mask = [](ManagedRegister reg) -> uint64_t {
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Arm64ManagedRegister arm64_reg = reg.AsArm64();
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if (arm64_reg.IsXRegister()) {
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size_t core_reg_number = static_cast<size_t>(arm64_reg.AsXRegister());
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DCHECK_LT(core_reg_number, 31u); // xSP, xZR not allowed.
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return UINT64_C(1) << core_reg_number;
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} else if (arm64_reg.IsWRegister()) {
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size_t core_reg_number = static_cast<size_t>(arm64_reg.AsWRegister());
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DCHECK_LT(core_reg_number, 31u); // wSP, wZR not allowed.
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return UINT64_C(1) << core_reg_number;
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} else if (arm64_reg.IsDRegister()) {
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size_t fp_reg_number = static_cast<size_t>(arm64_reg.AsDRegister());
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DCHECK_LT(fp_reg_number, 32u);
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return (UINT64_C(1) << 32u) << fp_reg_number;
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} else {
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DCHECK(arm64_reg.IsSRegister());
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size_t fp_reg_number = static_cast<size_t>(arm64_reg.AsSRegister());
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DCHECK_LT(fp_reg_number, 32u);
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return (UINT64_C(1) << 32u) << fp_reg_number;
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}
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};
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// Collect registers to move while storing/copying args to stack slots.
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// More than 8 core or FP reg args are very rare, so we do not optimize
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// for that case by using LDP/STP.
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// TODO: LDP/STP will be useful for normal and @FastNative where we need
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// to spill even the leading arguments.
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uint64_t src_regs = 0u;
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uint64_t dest_regs = 0u;
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for (size_t i = 0, arg_count = srcs.size(); i != arg_count; ++i) {
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const ArgumentLocation& src = srcs[i];
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const ArgumentLocation& dest = dests[i];
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DCHECK_EQ(src.GetSize(), dest.GetSize());
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if (dest.IsRegister()) {
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if (src.IsRegister() && src.GetRegister().Equals(dest.GetRegister())) {
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// Nothing to do.
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} else {
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if (src.IsRegister()) {
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src_regs |= get_mask(src.GetRegister());
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}
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dest_regs |= get_mask(dest.GetRegister());
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}
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} else {
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if (src.IsRegister()) {
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Store(dest.GetFrameOffset(), src.GetRegister(), dest.GetSize());
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} else {
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Copy(dest.GetFrameOffset(), src.GetFrameOffset(), dest.GetSize());
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}
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}
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}
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// Fill destination registers.
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// There should be no cycles, so this simple algorithm should make progress.
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while (dest_regs != 0u) {
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uint64_t old_dest_regs = dest_regs;
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for (size_t i = 0, arg_count = srcs.size(); i != arg_count; ++i) {
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const ArgumentLocation& src = srcs[i];
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const ArgumentLocation& dest = dests[i];
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if (!dest.IsRegister()) {
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continue; // Stored in first loop above.
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}
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uint64_t dest_reg_mask = get_mask(dest.GetRegister());
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if ((dest_reg_mask & dest_regs) == 0u) {
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continue; // Equals source, or already filled in one of previous iterations.
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}
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if ((dest_reg_mask & src_regs) != 0u) {
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continue; // Cannot clobber this register yet.
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}
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if (src.IsRegister()) {
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Move(dest.GetRegister(), src.GetRegister(), dest.GetSize());
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src_regs &= ~get_mask(src.GetRegister()); // Allow clobbering source register.
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} else {
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Load(dest.GetRegister(), src.GetFrameOffset(), dest.GetSize());
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}
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dest_regs &= ~get_mask(dest.GetRegister()); // Destination register was filled.
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}
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CHECK_NE(old_dest_regs, dest_regs);
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DCHECK_EQ(0u, dest_regs & ~old_dest_regs);
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}
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}
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void Arm64JNIMacroAssembler::Move(ManagedRegister m_dst, ManagedRegister m_src, size_t size) {
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Arm64ManagedRegister dst = m_dst.AsArm64();
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if (kIsDebugBuild) {
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// Check that the destination is not a scratch register.
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UseScratchRegisterScope temps(asm_.GetVIXLAssembler());
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if (dst.IsXRegister()) {
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CHECK(!temps.IsAvailable(reg_x(dst.AsXRegister())));
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} else if (dst.IsWRegister()) {
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CHECK(!temps.IsAvailable(reg_w(dst.AsWRegister())));
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} else if (dst.IsSRegister()) {
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CHECK(!temps.IsAvailable(reg_s(dst.AsSRegister())));
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} else {
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CHECK(!temps.IsAvailable(reg_d(dst.AsDRegister())));
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}
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}
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Arm64ManagedRegister src = m_src.AsArm64();
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if (!dst.Equals(src)) {
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if (dst.IsXRegister()) {
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if (size == 4) {
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CHECK(src.IsWRegister());
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___ Mov(reg_w(dst.AsOverlappingWRegister()), reg_w(src.AsWRegister()));
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} else {
|
|
if (src.IsXRegister()) {
|
|
___ Mov(reg_x(dst.AsXRegister()), reg_x(src.AsXRegister()));
|
|
} else {
|
|
___ Mov(reg_x(dst.AsXRegister()), reg_x(src.AsOverlappingXRegister()));
|
|
}
|
|
}
|
|
} else if (dst.IsWRegister()) {
|
|
CHECK(src.IsWRegister()) << src;
|
|
___ Mov(reg_w(dst.AsWRegister()), reg_w(src.AsWRegister()));
|
|
} else if (dst.IsSRegister()) {
|
|
CHECK(src.IsSRegister()) << src;
|
|
___ Fmov(reg_s(dst.AsSRegister()), reg_s(src.AsSRegister()));
|
|
} else {
|
|
CHECK(dst.IsDRegister()) << dst;
|
|
CHECK(src.IsDRegister()) << src;
|
|
___ Fmov(reg_d(dst.AsDRegister()), reg_d(src.AsDRegister()));
|
|
}
|
|
}
|
|
}
|
|
|
|
void Arm64JNIMacroAssembler::CopyRawPtrFromThread(FrameOffset fr_offs, ThreadOffset64 tr_offs) {
|
|
UseScratchRegisterScope temps(asm_.GetVIXLAssembler());
|
|
Register scratch = temps.AcquireX();
|
|
___ Ldr(scratch, MEM_OP(reg_x(TR), tr_offs.Int32Value()));
|
|
___ Str(scratch, MEM_OP(sp, fr_offs.Int32Value()));
|
|
}
|
|
|
|
void Arm64JNIMacroAssembler::CopyRawPtrToThread(ThreadOffset64 tr_offs,
|
|
FrameOffset fr_offs,
|
|
ManagedRegister m_scratch) {
|
|
Arm64ManagedRegister scratch = m_scratch.AsArm64();
|
|
CHECK(scratch.IsXRegister()) << scratch;
|
|
LoadFromOffset(scratch.AsXRegister(), SP, fr_offs.Int32Value());
|
|
StoreToOffset(scratch.AsXRegister(), TR, tr_offs.Int32Value());
|
|
}
|
|
|
|
void Arm64JNIMacroAssembler::CopyRef(FrameOffset dest, FrameOffset src) {
|
|
UseScratchRegisterScope temps(asm_.GetVIXLAssembler());
|
|
Register scratch = temps.AcquireW();
|
|
___ Ldr(scratch, MEM_OP(reg_x(SP), src.Int32Value()));
|
|
___ Str(scratch, MEM_OP(reg_x(SP), dest.Int32Value()));
|
|
}
|
|
|
|
void Arm64JNIMacroAssembler::CopyRef(FrameOffset dest,
|
|
ManagedRegister base,
|
|
MemberOffset offs,
|
|
bool unpoison_reference) {
|
|
UseScratchRegisterScope temps(asm_.GetVIXLAssembler());
|
|
Register scratch = temps.AcquireW();
|
|
___ Ldr(scratch, MEM_OP(reg_x(base.AsArm64().AsXRegister()), offs.Int32Value()));
|
|
if (unpoison_reference) {
|
|
asm_.MaybeUnpoisonHeapReference(scratch);
|
|
}
|
|
___ Str(scratch, MEM_OP(reg_x(SP), dest.Int32Value()));
|
|
}
|
|
|
|
void Arm64JNIMacroAssembler::Copy(FrameOffset dest, FrameOffset src, size_t size) {
|
|
DCHECK(size == 4 || size == 8) << size;
|
|
UseScratchRegisterScope temps(asm_.GetVIXLAssembler());
|
|
Register scratch = (size == 8) ? temps.AcquireX() : temps.AcquireW();
|
|
___ Ldr(scratch, MEM_OP(reg_x(SP), src.Int32Value()));
|
|
___ Str(scratch, MEM_OP(reg_x(SP), dest.Int32Value()));
|
|
}
|
|
|
|
void Arm64JNIMacroAssembler::Copy(FrameOffset dest,
|
|
ManagedRegister src_base,
|
|
Offset src_offset,
|
|
ManagedRegister m_scratch,
|
|
size_t size) {
|
|
Arm64ManagedRegister scratch = m_scratch.AsArm64();
|
|
Arm64ManagedRegister base = src_base.AsArm64();
|
|
CHECK(base.IsXRegister()) << base;
|
|
CHECK(scratch.IsXRegister() || scratch.IsWRegister()) << scratch;
|
|
CHECK(size == 4 || size == 8) << size;
|
|
if (size == 4) {
|
|
LoadWFromOffset(kLoadWord, scratch.AsWRegister(), base.AsXRegister(),
|
|
src_offset.Int32Value());
|
|
StoreWToOffset(kStoreWord, scratch.AsWRegister(), SP, dest.Int32Value());
|
|
} else if (size == 8) {
|
|
LoadFromOffset(scratch.AsXRegister(), base.AsXRegister(), src_offset.Int32Value());
|
|
StoreToOffset(scratch.AsXRegister(), SP, dest.Int32Value());
|
|
} else {
|
|
UNIMPLEMENTED(FATAL) << "We only support Copy() of size 4 and 8";
|
|
}
|
|
}
|
|
|
|
void Arm64JNIMacroAssembler::Copy(ManagedRegister m_dest_base,
|
|
Offset dest_offs,
|
|
FrameOffset src,
|
|
ManagedRegister m_scratch,
|
|
size_t size) {
|
|
Arm64ManagedRegister scratch = m_scratch.AsArm64();
|
|
Arm64ManagedRegister base = m_dest_base.AsArm64();
|
|
CHECK(base.IsXRegister()) << base;
|
|
CHECK(scratch.IsXRegister() || scratch.IsWRegister()) << scratch;
|
|
CHECK(size == 4 || size == 8) << size;
|
|
if (size == 4) {
|
|
LoadWFromOffset(kLoadWord, scratch.AsWRegister(), SP, src.Int32Value());
|
|
StoreWToOffset(kStoreWord, scratch.AsWRegister(), base.AsXRegister(),
|
|
dest_offs.Int32Value());
|
|
} else if (size == 8) {
|
|
LoadFromOffset(scratch.AsXRegister(), SP, src.Int32Value());
|
|
StoreToOffset(scratch.AsXRegister(), base.AsXRegister(), dest_offs.Int32Value());
|
|
} else {
|
|
UNIMPLEMENTED(FATAL) << "We only support Copy() of size 4 and 8";
|
|
}
|
|
}
|
|
|
|
void Arm64JNIMacroAssembler::Copy(FrameOffset /*dst*/,
|
|
FrameOffset /*src_base*/,
|
|
Offset /*src_offset*/,
|
|
ManagedRegister /*mscratch*/,
|
|
size_t /*size*/) {
|
|
UNIMPLEMENTED(FATAL) << "Unimplemented Copy() variant";
|
|
}
|
|
|
|
void Arm64JNIMacroAssembler::Copy(ManagedRegister m_dest,
|
|
Offset dest_offset,
|
|
ManagedRegister m_src,
|
|
Offset src_offset,
|
|
ManagedRegister m_scratch,
|
|
size_t size) {
|
|
Arm64ManagedRegister scratch = m_scratch.AsArm64();
|
|
Arm64ManagedRegister src = m_src.AsArm64();
|
|
Arm64ManagedRegister dest = m_dest.AsArm64();
|
|
CHECK(dest.IsXRegister()) << dest;
|
|
CHECK(src.IsXRegister()) << src;
|
|
CHECK(scratch.IsXRegister() || scratch.IsWRegister()) << scratch;
|
|
CHECK(size == 4 || size == 8) << size;
|
|
if (size == 4) {
|
|
if (scratch.IsWRegister()) {
|
|
LoadWFromOffset(kLoadWord, scratch.AsWRegister(), src.AsXRegister(),
|
|
src_offset.Int32Value());
|
|
StoreWToOffset(kStoreWord, scratch.AsWRegister(), dest.AsXRegister(),
|
|
dest_offset.Int32Value());
|
|
} else {
|
|
LoadWFromOffset(kLoadWord, scratch.AsOverlappingWRegister(), src.AsXRegister(),
|
|
src_offset.Int32Value());
|
|
StoreWToOffset(kStoreWord, scratch.AsOverlappingWRegister(), dest.AsXRegister(),
|
|
dest_offset.Int32Value());
|
|
}
|
|
} else if (size == 8) {
|
|
LoadFromOffset(scratch.AsXRegister(), src.AsXRegister(), src_offset.Int32Value());
|
|
StoreToOffset(scratch.AsXRegister(), dest.AsXRegister(), dest_offset.Int32Value());
|
|
} else {
|
|
UNIMPLEMENTED(FATAL) << "We only support Copy() of size 4 and 8";
|
|
}
|
|
}
|
|
|
|
void Arm64JNIMacroAssembler::Copy(FrameOffset /*dst*/,
|
|
Offset /*dest_offset*/,
|
|
FrameOffset /*src*/,
|
|
Offset /*src_offset*/,
|
|
ManagedRegister /*scratch*/,
|
|
size_t /*size*/) {
|
|
UNIMPLEMENTED(FATAL) << "Unimplemented Copy() variant";
|
|
}
|
|
|
|
void Arm64JNIMacroAssembler::MemoryBarrier(ManagedRegister m_scratch ATTRIBUTE_UNUSED) {
|
|
// TODO: Should we check that m_scratch is IP? - see arm.
|
|
___ Dmb(InnerShareable, BarrierAll);
|
|
}
|
|
|
|
void Arm64JNIMacroAssembler::SignExtend(ManagedRegister mreg, size_t size) {
|
|
Arm64ManagedRegister reg = mreg.AsArm64();
|
|
CHECK(size == 1 || size == 2) << size;
|
|
CHECK(reg.IsWRegister()) << reg;
|
|
if (size == 1) {
|
|
___ Sxtb(reg_w(reg.AsWRegister()), reg_w(reg.AsWRegister()));
|
|
} else {
|
|
___ Sxth(reg_w(reg.AsWRegister()), reg_w(reg.AsWRegister()));
|
|
}
|
|
}
|
|
|
|
void Arm64JNIMacroAssembler::ZeroExtend(ManagedRegister mreg, size_t size) {
|
|
Arm64ManagedRegister reg = mreg.AsArm64();
|
|
CHECK(size == 1 || size == 2) << size;
|
|
CHECK(reg.IsWRegister()) << reg;
|
|
if (size == 1) {
|
|
___ Uxtb(reg_w(reg.AsWRegister()), reg_w(reg.AsWRegister()));
|
|
} else {
|
|
___ Uxth(reg_w(reg.AsWRegister()), reg_w(reg.AsWRegister()));
|
|
}
|
|
}
|
|
|
|
void Arm64JNIMacroAssembler::VerifyObject(ManagedRegister /*src*/, bool /*could_be_null*/) {
|
|
// TODO: not validating references.
|
|
}
|
|
|
|
void Arm64JNIMacroAssembler::VerifyObject(FrameOffset /*src*/, bool /*could_be_null*/) {
|
|
// TODO: not validating references.
|
|
}
|
|
|
|
void Arm64JNIMacroAssembler::Jump(ManagedRegister m_base, Offset offs) {
|
|
Arm64ManagedRegister base = m_base.AsArm64();
|
|
CHECK(base.IsXRegister()) << base;
|
|
UseScratchRegisterScope temps(asm_.GetVIXLAssembler());
|
|
Register scratch = temps.AcquireX();
|
|
___ Ldr(scratch, MEM_OP(reg_x(base.AsXRegister()), offs.Int32Value()));
|
|
___ Br(scratch);
|
|
}
|
|
|
|
void Arm64JNIMacroAssembler::Call(ManagedRegister m_base, Offset offs) {
|
|
Arm64ManagedRegister base = m_base.AsArm64();
|
|
CHECK(base.IsXRegister()) << base;
|
|
___ Ldr(lr, MEM_OP(reg_x(base.AsXRegister()), offs.Int32Value()));
|
|
___ Blr(lr);
|
|
}
|
|
|
|
void Arm64JNIMacroAssembler::Call(FrameOffset base, Offset offs) {
|
|
// Call *(*(SP + base) + offset)
|
|
___ Ldr(lr, MEM_OP(reg_x(SP), base.Int32Value()));
|
|
___ Ldr(lr, MEM_OP(lr, offs.Int32Value()));
|
|
___ Blr(lr);
|
|
}
|
|
|
|
void Arm64JNIMacroAssembler::CallFromThread(ThreadOffset64 offset ATTRIBUTE_UNUSED) {
|
|
UNIMPLEMENTED(FATAL) << "Unimplemented Call() variant";
|
|
}
|
|
|
|
void Arm64JNIMacroAssembler::CreateJObject(ManagedRegister m_out_reg,
|
|
FrameOffset spilled_reference_offset,
|
|
ManagedRegister m_in_reg,
|
|
bool null_allowed) {
|
|
Arm64ManagedRegister out_reg = m_out_reg.AsArm64();
|
|
Arm64ManagedRegister in_reg = m_in_reg.AsArm64();
|
|
// For now we only hold stale handle scope entries in x registers.
|
|
CHECK(in_reg.IsNoRegister() || in_reg.IsXRegister()) << in_reg;
|
|
CHECK(out_reg.IsXRegister()) << out_reg;
|
|
if (null_allowed) {
|
|
// Null values get a jobject value null. Otherwise, the jobject is
|
|
// the address of the spilled reference.
|
|
// e.g. out_reg = (in == 0) ? 0 : (SP+spilled_reference_offset)
|
|
if (in_reg.IsNoRegister()) {
|
|
LoadWFromOffset(kLoadWord, out_reg.AsOverlappingWRegister(), SP,
|
|
spilled_reference_offset.Int32Value());
|
|
in_reg = out_reg;
|
|
}
|
|
___ Cmp(reg_w(in_reg.AsOverlappingWRegister()), 0);
|
|
if (!out_reg.Equals(in_reg)) {
|
|
LoadImmediate(out_reg.AsXRegister(), 0, eq);
|
|
}
|
|
AddConstant(out_reg.AsXRegister(), SP, spilled_reference_offset.Int32Value(), ne);
|
|
} else {
|
|
AddConstant(out_reg.AsXRegister(), SP, spilled_reference_offset.Int32Value(), al);
|
|
}
|
|
}
|
|
|
|
void Arm64JNIMacroAssembler::CreateJObject(FrameOffset out_off,
|
|
FrameOffset spilled_reference_offset,
|
|
bool null_allowed) {
|
|
UseScratchRegisterScope temps(asm_.GetVIXLAssembler());
|
|
Register scratch = temps.AcquireX();
|
|
if (null_allowed) {
|
|
Register scratch2 = temps.AcquireW();
|
|
___ Ldr(scratch2, MEM_OP(reg_x(SP), spilled_reference_offset.Int32Value()));
|
|
___ Add(scratch, reg_x(SP), spilled_reference_offset.Int32Value());
|
|
// Null values get a jobject value null. Otherwise, the jobject is
|
|
// the address of the spilled reference.
|
|
// e.g. scratch = (scratch == 0) ? 0 : (SP+spilled_reference_offset)
|
|
___ Cmp(scratch2, 0);
|
|
___ Csel(scratch, scratch, xzr, ne);
|
|
} else {
|
|
___ Add(scratch, reg_x(SP), spilled_reference_offset.Int32Value());
|
|
}
|
|
___ Str(scratch, MEM_OP(reg_x(SP), out_off.Int32Value()));
|
|
}
|
|
|
|
void Arm64JNIMacroAssembler::ExceptionPoll(size_t stack_adjust) {
|
|
CHECK_ALIGNED(stack_adjust, kStackAlignment);
|
|
UseScratchRegisterScope temps(asm_.GetVIXLAssembler());
|
|
Register scratch = temps.AcquireX();
|
|
exception_blocks_.emplace_back(new Arm64Exception(scratch, stack_adjust));
|
|
___ Ldr(scratch, MEM_OP(reg_x(TR), Thread::ExceptionOffset<kArm64PointerSize>().Int32Value()));
|
|
___ Cbnz(scratch, exception_blocks_.back()->Entry());
|
|
}
|
|
|
|
std::unique_ptr<JNIMacroLabel> Arm64JNIMacroAssembler::CreateLabel() {
|
|
return std::unique_ptr<JNIMacroLabel>(new Arm64JNIMacroLabel());
|
|
}
|
|
|
|
void Arm64JNIMacroAssembler::Jump(JNIMacroLabel* label) {
|
|
CHECK(label != nullptr);
|
|
___ B(Arm64JNIMacroLabel::Cast(label)->AsArm64());
|
|
}
|
|
|
|
void Arm64JNIMacroAssembler::TestGcMarking(JNIMacroLabel* label, JNIMacroUnaryCondition cond) {
|
|
CHECK(label != nullptr);
|
|
|
|
UseScratchRegisterScope temps(asm_.GetVIXLAssembler());
|
|
Register test_reg;
|
|
DCHECK_EQ(Thread::IsGcMarkingSize(), 4u);
|
|
DCHECK(kUseReadBarrier);
|
|
if (kUseBakerReadBarrier) {
|
|
// TestGcMarking() is used in the JNI stub entry when the marking register is up to date.
|
|
if (kIsDebugBuild && emit_run_time_checks_in_debug_mode_) {
|
|
Register temp = temps.AcquireW();
|
|
asm_.GenerateMarkingRegisterCheck(temp);
|
|
}
|
|
test_reg = reg_w(MR);
|
|
} else {
|
|
test_reg = temps.AcquireW();
|
|
int32_t is_gc_marking_offset = Thread::IsGcMarkingOffset<kArm64PointerSize>().Int32Value();
|
|
___ Ldr(test_reg, MEM_OP(reg_x(TR), is_gc_marking_offset));
|
|
}
|
|
switch (cond) {
|
|
case JNIMacroUnaryCondition::kZero:
|
|
___ Cbz(test_reg, Arm64JNIMacroLabel::Cast(label)->AsArm64());
|
|
break;
|
|
case JNIMacroUnaryCondition::kNotZero:
|
|
___ Cbnz(test_reg, Arm64JNIMacroLabel::Cast(label)->AsArm64());
|
|
break;
|
|
default:
|
|
LOG(FATAL) << "Not implemented unary condition: " << static_cast<int>(cond);
|
|
UNREACHABLE();
|
|
}
|
|
}
|
|
|
|
void Arm64JNIMacroAssembler::Bind(JNIMacroLabel* label) {
|
|
CHECK(label != nullptr);
|
|
___ Bind(Arm64JNIMacroLabel::Cast(label)->AsArm64());
|
|
}
|
|
|
|
void Arm64JNIMacroAssembler::EmitExceptionPoll(Arm64Exception* exception) {
|
|
UseScratchRegisterScope temps(asm_.GetVIXLAssembler());
|
|
temps.Exclude(exception->scratch_);
|
|
|
|
// Bind exception poll entry.
|
|
___ Bind(exception->Entry());
|
|
if (exception->stack_adjust_ != 0) { // Fix up the frame.
|
|
DecreaseFrameSize(exception->stack_adjust_);
|
|
}
|
|
// Pass exception object as argument.
|
|
// Don't care about preserving X0 as this won't return.
|
|
___ Mov(reg_x(X0), exception->scratch_);
|
|
___ Ldr(lr,
|
|
MEM_OP(reg_x(TR),
|
|
QUICK_ENTRYPOINT_OFFSET(kArm64PointerSize, pDeliverException).Int32Value()));
|
|
|
|
___ Blr(lr);
|
|
// Call should never return.
|
|
___ Brk();
|
|
}
|
|
|
|
void Arm64JNIMacroAssembler::BuildFrame(size_t frame_size,
|
|
ManagedRegister method_reg,
|
|
ArrayRef<const ManagedRegister> callee_save_regs) {
|
|
// Setup VIXL CPURegList for callee-saves.
|
|
CPURegList core_reg_list(CPURegister::kRegister, kXRegSize, 0);
|
|
CPURegList fp_reg_list(CPURegister::kVRegister, kDRegSize, 0);
|
|
for (auto r : callee_save_regs) {
|
|
Arm64ManagedRegister reg = r.AsArm64();
|
|
if (reg.IsXRegister()) {
|
|
core_reg_list.Combine(reg_x(reg.AsXRegister()).GetCode());
|
|
} else {
|
|
DCHECK(reg.IsDRegister());
|
|
fp_reg_list.Combine(reg_d(reg.AsDRegister()).GetCode());
|
|
}
|
|
}
|
|
size_t core_reg_size = core_reg_list.GetTotalSizeInBytes();
|
|
size_t fp_reg_size = fp_reg_list.GetTotalSizeInBytes();
|
|
|
|
// Increase frame to required size.
|
|
DCHECK_ALIGNED(frame_size, kStackAlignment);
|
|
// Must at least have space for Method* if we're going to spill it.
|
|
DCHECK_GE(frame_size,
|
|
core_reg_size + fp_reg_size + (method_reg.IsRegister() ? kXRegSizeInBytes : 0u));
|
|
IncreaseFrameSize(frame_size);
|
|
|
|
// Save callee-saves.
|
|
asm_.SpillRegisters(core_reg_list, frame_size - core_reg_size);
|
|
asm_.SpillRegisters(fp_reg_list, frame_size - core_reg_size - fp_reg_size);
|
|
|
|
if (method_reg.IsRegister()) {
|
|
// Write ArtMethod*
|
|
DCHECK(X0 == method_reg.AsArm64().AsXRegister());
|
|
StoreToOffset(X0, SP, 0);
|
|
}
|
|
}
|
|
|
|
void Arm64JNIMacroAssembler::RemoveFrame(size_t frame_size,
|
|
ArrayRef<const ManagedRegister> callee_save_regs,
|
|
bool may_suspend) {
|
|
// Setup VIXL CPURegList for callee-saves.
|
|
CPURegList core_reg_list(CPURegister::kRegister, kXRegSize, 0);
|
|
CPURegList fp_reg_list(CPURegister::kVRegister, kDRegSize, 0);
|
|
for (auto r : callee_save_regs) {
|
|
Arm64ManagedRegister reg = r.AsArm64();
|
|
if (reg.IsXRegister()) {
|
|
core_reg_list.Combine(reg_x(reg.AsXRegister()).GetCode());
|
|
} else {
|
|
DCHECK(reg.IsDRegister());
|
|
fp_reg_list.Combine(reg_d(reg.AsDRegister()).GetCode());
|
|
}
|
|
}
|
|
size_t core_reg_size = core_reg_list.GetTotalSizeInBytes();
|
|
size_t fp_reg_size = fp_reg_list.GetTotalSizeInBytes();
|
|
|
|
// For now we only check that the size of the frame is large enough to hold spills and method
|
|
// reference.
|
|
DCHECK_GE(frame_size, core_reg_size + fp_reg_size);
|
|
DCHECK_ALIGNED(frame_size, kAapcs64StackAlignment);
|
|
|
|
cfi().RememberState();
|
|
|
|
// Restore callee-saves.
|
|
asm_.UnspillRegisters(core_reg_list, frame_size - core_reg_size);
|
|
asm_.UnspillRegisters(fp_reg_list, frame_size - core_reg_size - fp_reg_size);
|
|
|
|
if (kEmitCompilerReadBarrier && kUseBakerReadBarrier) {
|
|
vixl::aarch64::Register mr = reg_x(MR); // Marking Register.
|
|
vixl::aarch64::Register tr = reg_x(TR); // Thread Register.
|
|
|
|
if (may_suspend) {
|
|
// The method may be suspended; refresh the Marking Register.
|
|
___ Ldr(mr.W(), MemOperand(tr, Thread::IsGcMarkingOffset<kArm64PointerSize>().Int32Value()));
|
|
} else {
|
|
// The method shall not be suspended; no need to refresh the Marking Register.
|
|
|
|
// The Marking Register is a callee-save register and thus has been
|
|
// preserved by native code following the AAPCS64 calling convention.
|
|
|
|
// The following condition is a compile-time one, so it does not have a run-time cost.
|
|
if (kIsDebugBuild) {
|
|
// The following condition is a run-time one; it is executed after the
|
|
// previous compile-time test, to avoid penalizing non-debug builds.
|
|
if (emit_run_time_checks_in_debug_mode_) {
|
|
// Emit a run-time check verifying that the Marking Register is up-to-date.
|
|
UseScratchRegisterScope temps(asm_.GetVIXLAssembler());
|
|
Register temp = temps.AcquireW();
|
|
// Ensure we are not clobbering a callee-save register that was restored before.
|
|
DCHECK(!core_reg_list.IncludesAliasOf(temp.X()))
|
|
<< "core_reg_list should not contain scratch register X" << temp.GetCode();
|
|
asm_.GenerateMarkingRegisterCheck(temp);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Decrease frame size to start of callee saved regs.
|
|
DecreaseFrameSize(frame_size);
|
|
|
|
// Return to LR.
|
|
___ Ret();
|
|
|
|
// The CFI should be restored for any code that follows the exit block.
|
|
cfi().RestoreState();
|
|
cfi().DefCFAOffset(frame_size);
|
|
}
|
|
|
|
#undef ___
|
|
|
|
} // namespace arm64
|
|
} // namespace art
|