Google Git
Sign in
cobalt / cobalt / 25f5f36f7ec10aaaebdc9eda48cd1423123bdd55 / . / third_party / v8 / src / compiler / simd-scalar-lowering.cc
blob: 06673c3c0836a3d7f8f77cc552b05cf8fc7a4077 [file] [log] [blame]
// Copyright 2016 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/compiler/simd-scalar-lowering.h"
#include "src/codegen/machine-type.h"
#include "src/common/globals.h"
#include "src/compiler/diamond.h"
#include "src/compiler/linkage.h"
#include "src/compiler/machine-operator.h"
#include "src/compiler/node-matchers.h"
#include "src/compiler/node-properties.h"
#include "src/compiler/node.h"
#include "src/compiler/wasm-compiler.h"
namespace v8 {
namespace internal {
namespace compiler {
namespace {
static const int kNumLanes64 = 2;
static const int kNumLanes32 = 4;
static const int kNumLanes16 = 8;
static const int kNumLanes8 = 16;
static const int32_t kMask16 = 0xFFFF;
static const int32_t kMask8 = 0xFF;
static const int32_t kShift16 = 16;
static const int32_t kShift8 = 24;
static const int32_t kShiftMask8 = 0x7;
static const int32_t kShiftMask16 = 0xF;
static const int32_t kShiftMask32 = 0x1F;
static const int32_t kShiftMask64 = 0x3F;
// Shift values are taken modulo lane size. This helper calculates the mask
// required for different shift opcodes.
int GetMaskForShift(Node* node) {
switch (node->opcode()) {
case IrOpcode::kI8x16Shl:
case IrOpcode::kI8x16ShrS:
case IrOpcode::kI8x16ShrU:
return kShiftMask8;
case IrOpcode::kI16x8Shl:
case IrOpcode::kI16x8ShrS:
case IrOpcode::kI16x8ShrU:
return kShiftMask16;
case IrOpcode::kI32x4Shl:
case IrOpcode::kI32x4ShrS:
case IrOpcode::kI32x4ShrU:
return kShiftMask32;
case IrOpcode::kI64x2Shl:
case IrOpcode::kI64x2ShrS:
case IrOpcode::kI64x2ShrU:
return kShiftMask64;
default:
UNIMPLEMENTED();
}
}
} // anonymous namespace
SimdScalarLowering::SimdScalarLowering(
MachineGraph* mcgraph, Signature<MachineRepresentation>* signature)
: mcgraph_(mcgraph),
state_(mcgraph->graph(), 3),
stack_(mcgraph_->zone()),
replacements_(nullptr),
signature_(signature),
placeholder_(graph()->NewNode(common()->Parameter(-2, "placeholder"),
graph()->start())),
parameter_count_after_lowering_(-1) {
DCHECK_NOT_NULL(graph());
DCHECK_NOT_NULL(graph()->end());
replacements_ = zone()->NewArray<Replacement>(graph()->NodeCount());
memset(static_cast<void*>(replacements_), 0,
sizeof(Replacement) * graph()->NodeCount());
}
void SimdScalarLowering::LowerGraph() {
stack_.push_back({graph()->end(), 0});
state_.Set(graph()->end(), State::kOnStack);
replacements_[graph()->end()->id()].type = SimdType::kInt32x4;
while (!stack_.empty()) {
NodeState& top = stack_.back();
if (top.input_index == top.node->InputCount()) {
// All inputs of top have already been lowered, now lower top.
stack_.pop_back();
state_.Set(top.node, State::kVisited);
LowerNode(top.node);
} else {
// Push the next input onto the stack.
Node* input = top.node->InputAt(top.input_index++);
if (state_.Get(input) == State::kUnvisited) {
SetLoweredType(input, top.node);
if (input->opcode() == IrOpcode::kPhi) {
// To break cycles with phi nodes we push phis on a separate stack so
// that they are processed after all other nodes.
PreparePhiReplacement(input);
stack_.push_front({input, 0});
} else if (input->opcode() == IrOpcode::kEffectPhi ||
input->opcode() == IrOpcode::kLoop) {
stack_.push_front({input, 0});
} else {
stack_.push_back({input, 0});
}
state_.Set(input, State::kOnStack);
}
}
}
}
#define FOREACH_INT64X2_OPCODE(V) \
V(I64x2Splat) \
V(I64x2ExtractLane) \
V(I64x2ReplaceLane) \
V(I64x2Neg) \
V(I64x2Shl) \
V(I64x2ShrS) \
V(I64x2ShrU) \
V(I64x2Add) \
V(I64x2Sub) \
V(I64x2Mul)
#define FOREACH_INT32X4_OPCODE(V) \
V(I32x4Splat) \
V(I32x4ExtractLane) \
V(I32x4ReplaceLane) \
V(I32x4SConvertF32x4) \
V(I32x4UConvertF32x4) \
V(I32x4SConvertI16x8Low) \
V(I32x4SConvertI16x8High) \
V(I32x4Neg) \
V(I32x4Shl) \
V(I32x4ShrS) \
V(I32x4Add) \
V(I32x4AddHoriz) \
V(I32x4Sub) \
V(I32x4Mul) \
V(I32x4MinS) \
V(I32x4MaxS) \
V(I32x4ShrU) \
V(I32x4MinU) \
V(I32x4MaxU) \
V(I32x4DotI16x8S) \
V(I32x4Eq) \
V(I32x4Ne) \
V(I32x4LtS) \
V(I32x4LtU) \
V(I32x4GtS) \
V(I32x4GtU) \
V(I32x4LeS) \
V(I32x4LeU) \
V(I32x4GeS) \
V(I32x4GeU) \
V(I32x4UConvertI16x8Low) \
V(I32x4UConvertI16x8High) \
V(I32x4Abs) \
V(S128And) \
V(S128Or) \
V(S128Xor) \
V(S128Not) \
V(S128AndNot) \
V(S128Select) \
V(V32x4AnyTrue) \
V(V32x4AllTrue) \
V(V16x8AnyTrue) \
V(V16x8AllTrue) \
V(V8x16AnyTrue) \
V(V8x16AllTrue) \
V(I32x4BitMask)
#define FOREACH_FLOAT64X2_OPCODE(V) \
V(F64x2Splat) \
V(F64x2ExtractLane) \
V(F64x2ReplaceLane) \
V(F64x2Abs) \
V(F64x2Neg) \
V(F64x2Sqrt) \
V(F64x2Add) \
V(F64x2Sub) \
V(F64x2Mul) \
V(F64x2Div) \
V(F64x2Min) \
V(F64x2Max) \
V(F64x2Pmin) \
V(F64x2Pmax) \
V(F64x2Ceil) \
V(F64x2Floor) \
V(F64x2Trunc) \
V(F64x2NearestInt)
#define FOREACH_FLOAT32X4_OPCODE(V) \
V(F32x4Splat) \
V(F32x4ExtractLane) \
V(F32x4ReplaceLane) \
V(F32x4SConvertI32x4) \
V(F32x4UConvertI32x4) \
V(F32x4Abs) \
V(F32x4Neg) \
V(F32x4Sqrt) \
V(F32x4RecipApprox) \
V(F32x4RecipSqrtApprox) \
V(F32x4Add) \
V(F32x4AddHoriz) \
V(F32x4Sub) \
V(F32x4Mul) \
V(F32x4Div) \
V(F32x4Min) \
V(F32x4Max) \
V(F32x4Pmin) \
V(F32x4Pmax) \
V(F32x4Ceil) \
V(F32x4Floor) \
V(F32x4Trunc) \
V(F32x4NearestInt)
#define FOREACH_FLOAT64x2_TO_INT64x2OPCODE(V) \
V(F64x2Eq) \
V(F64x2Ne) \
V(F64x2Lt) \
V(F64x2Le)
#define FOREACH_FLOAT32X4_TO_INT32X4OPCODE(V) \
V(F32x4Eq) \
V(F32x4Ne) \
V(F32x4Lt) \
V(F32x4Le) \
V(F32x4Gt) \
V(F32x4Ge)
#define FOREACH_INT16X8_OPCODE(V) \
V(I16x8Splat) \
V(I16x8ExtractLaneU) \
V(I16x8ExtractLaneS) \
V(I16x8ReplaceLane) \
V(I16x8SConvertI8x16Low) \
V(I16x8SConvertI8x16High) \
V(I16x8Neg) \
V(I16x8Shl) \
V(I16x8ShrS) \
V(I16x8SConvertI32x4) \
V(I16x8Add) \
V(I16x8AddSatS) \
V(I16x8AddHoriz) \
V(I16x8Sub) \
V(I16x8SubSatS) \
V(I16x8Mul) \
V(I16x8MinS) \
V(I16x8MaxS) \
V(I16x8UConvertI8x16Low) \
V(I16x8UConvertI8x16High) \
V(I16x8ShrU) \
V(I16x8UConvertI32x4) \
V(I16x8AddSatU) \
V(I16x8SubSatU) \
V(I16x8MinU) \
V(I16x8MaxU) \
V(I16x8Eq) \
V(I16x8Ne) \
V(I16x8LtS) \
V(I16x8LtU) \
V(I16x8GtS) \
V(I16x8GtU) \
V(I16x8LeS) \
V(I16x8LeU) \
V(I16x8GeS) \
V(I16x8GeU) \
V(I16x8RoundingAverageU) \
V(I16x8Abs) \
V(I16x8BitMask)
#define FOREACH_INT8X16_OPCODE(V) \
V(I8x16Splat) \
V(I8x16ExtractLaneU) \
V(I8x16ExtractLaneS) \
V(I8x16ReplaceLane) \
V(I8x16SConvertI16x8) \
V(I8x16Neg) \
V(I8x16Shl) \
V(I8x16ShrS) \
V(I8x16Add) \
V(I8x16AddSatS) \
V(I8x16Sub) \
V(I8x16SubSatS) \
V(I8x16Mul) \
V(I8x16MinS) \
V(I8x16MaxS) \
V(I8x16ShrU) \
V(I8x16UConvertI16x8) \
V(I8x16AddSatU) \
V(I8x16SubSatU) \
V(I8x16MinU) \
V(I8x16MaxU) \
V(I8x16Eq) \
V(I8x16Ne) \
V(I8x16LtS) \
V(I8x16LtU) \
V(I8x16GtS) \
V(I8x16GtU) \
V(I8x16LeS) \
V(I8x16LeU) \
V(I8x16GeS) \
V(I8x16GeU) \
V(I8x16Swizzle) \
V(I8x16Shuffle) \
V(I8x16RoundingAverageU) \
V(I8x16Abs) \
V(I8x16BitMask)
MachineType SimdScalarLowering::MachineTypeFrom(SimdType simdType) {
switch (simdType) {
case SimdType::kFloat64x2:
return MachineType::Float64();
case SimdType::kFloat32x4:
return MachineType::Float32();
case SimdType::kInt64x2:
return MachineType::Int64();
case SimdType::kInt32x4:
return MachineType::Int32();
case SimdType::kInt16x8:
return MachineType::Int16();
case SimdType::kInt8x16:
return MachineType::Int8();
}
return MachineType::None();
}
void SimdScalarLowering::SetLoweredType(Node* node, Node* output) {
switch (node->opcode()) {
#define CASE_STMT(name) case IrOpcode::k##name:
FOREACH_FLOAT64X2_OPCODE(CASE_STMT) {
replacements_[node->id()].type = SimdType::kFloat64x2;
break;
}
FOREACH_INT64X2_OPCODE(CASE_STMT) {
replacements_[node->id()].type = SimdType::kInt64x2;
break;
}
FOREACH_INT32X4_OPCODE(CASE_STMT)
case IrOpcode::kReturn:
case IrOpcode::kParameter:
case IrOpcode::kPhi:
case IrOpcode::kCall: {
replacements_[node->id()].type = SimdType::kInt32x4;
break;
}
FOREACH_FLOAT32X4_OPCODE(CASE_STMT) {
replacements_[node->id()].type = SimdType::kFloat32x4;
break;
}
FOREACH_FLOAT32X4_TO_INT32X4OPCODE(CASE_STMT) {
replacements_[node->id()].type = SimdType::kInt32x4;
break;
}
FOREACH_FLOAT64x2_TO_INT64x2OPCODE(CASE_STMT) {
replacements_[node->id()].type = SimdType::kInt64x2;
break;
}
FOREACH_INT16X8_OPCODE(CASE_STMT) {
replacements_[node->id()].type = SimdType::kInt16x8;
break;
}
FOREACH_INT8X16_OPCODE(CASE_STMT) {
replacements_[node->id()].type = SimdType::kInt8x16;
break;
}
case IrOpcode::kLoadTransform: {
LoadTransformParameters params = LoadTransformParametersOf(node->op());
switch (params.transformation) {
case LoadTransformation::kS128Load8Splat:
replacements_[node->id()].type = SimdType::kInt8x16;
break;
case LoadTransformation::kS128Load16Splat:
case LoadTransformation::kS128Load8x8S:
case LoadTransformation::kS128Load8x8U:
replacements_[node->id()].type = SimdType::kInt16x8;
break;
case LoadTransformation::kS128Load32Splat:
case LoadTransformation::kS128Load16x4S:
case LoadTransformation::kS128Load16x4U:
case LoadTransformation::kS128Load32Zero:
replacements_[node->id()].type = SimdType::kInt32x4;
break;
case LoadTransformation::kS128Load64Splat:
case LoadTransformation::kS128Load32x2S:
case LoadTransformation::kS128Load32x2U:
case LoadTransformation::kS128Load64Zero:
replacements_[node->id()].type = SimdType::kInt64x2;
break;
default:
UNIMPLEMENTED();
}
break;
}
default: {
switch (output->opcode()) {
case IrOpcode::kF32x4SConvertI32x4:
case IrOpcode::kF32x4UConvertI32x4:
case IrOpcode::kI16x8SConvertI32x4:
case IrOpcode::kI16x8UConvertI32x4: {
replacements_[node->id()].type = SimdType::kInt32x4;
break;
}
case IrOpcode::kI8x16SConvertI16x8:
case IrOpcode::kI8x16UConvertI16x8:
case IrOpcode::kI32x4SConvertI16x8Low:
case IrOpcode::kI32x4SConvertI16x8High:
case IrOpcode::kI32x4UConvertI16x8Low:
case IrOpcode::kI32x4UConvertI16x8High: {
replacements_[node->id()].type = SimdType::kInt16x8;
break;
}
case IrOpcode::kI16x8SConvertI8x16Low:
case IrOpcode::kI16x8SConvertI8x16High:
case IrOpcode::kI16x8UConvertI8x16Low:
case IrOpcode::kI16x8UConvertI8x16High: {
replacements_[node->id()].type = SimdType::kInt8x16;
break;
}
FOREACH_FLOAT32X4_TO_INT32X4OPCODE(CASE_STMT)
case IrOpcode::kI32x4SConvertF32x4:
case IrOpcode::kI32x4UConvertF32x4: {
replacements_[node->id()].type = SimdType::kFloat32x4;
break;
}
case IrOpcode::kS128Select: {
replacements_[node->id()].type = SimdType::kInt32x4;
break;
}
default: {
replacements_[node->id()].type = replacements_[output->id()].type;
}
}
}
#undef CASE_STMT
}
}
static int GetParameterIndexAfterLoweringSimd128(
Signature<MachineRepresentation>* signature, int old_index) {
// In function calls, the simd128 types are passed as 4 Int32 types. The
// parameters are typecast to the types as needed for various operations.
int result = old_index;
for (int i = 0; i < old_index; ++i) {
if (signature->GetParam(i) == MachineRepresentation::kSimd128) {
result += 3;
}
}
return result;
}
int SimdScalarLowering::GetParameterCountAfterLowering() {
if (parameter_count_after_lowering_ == -1) {
// GetParameterIndexAfterLoweringSimd128(parameter_count) returns the
// parameter count after lowering.
parameter_count_after_lowering_ = GetParameterIndexAfterLoweringSimd128(
signature(), static_cast<int>(signature()->parameter_count()));
}
return parameter_count_after_lowering_;
}
static int GetReturnCountAfterLoweringSimd128(
Signature<MachineRepresentation>* signature) {
int result = static_cast<int>(signature->return_count());
for (int i = 0; i < static_cast<int>(signature->return_count()); ++i) {
if (signature->GetReturn(i) == MachineRepresentation::kSimd128) {
result += 3;
}
}
return result;
}
int GetReturnIndexAfterLowering(const CallDescriptor* call_descriptor,
int old_index) {
int result = old_index;
for (int i = 0; i < old_index; ++i) {
if (call_descriptor->GetReturnType(i).representation() ==
MachineRepresentation::kSimd128) {
result += kNumLanes32 - 1;
}
}
return result;
}
static int GetReturnCountAfterLoweringSimd128(
const CallDescriptor* call_descriptor) {
return GetReturnIndexAfterLowering(
call_descriptor, static_cast<int>(call_descriptor->ReturnCount()));
}
int SimdScalarLowering::NumLanes(SimdType type) {
int num_lanes = 0;
if (type == SimdType::kFloat64x2 || type == SimdType::kInt64x2) {
num_lanes = kNumLanes64;
} else if (type == SimdType::kFloat32x4 || type == SimdType::kInt32x4) {
num_lanes = kNumLanes32;
} else if (type == SimdType::kInt16x8) {
num_lanes = kNumLanes16;
} else if (type == SimdType::kInt8x16) {
num_lanes = kNumLanes8;
} else {
UNREACHABLE();
}
return num_lanes;
}
constexpr int SimdScalarLowering::kLaneOffsets[];
void SimdScalarLowering::GetIndexNodes(Node* index, Node** new_indices,
SimdType type) {
int num_lanes = NumLanes(type);
int lane_width = kSimd128Size / num_lanes;
int laneIndex = kLaneOffsets[0] / lane_width;
new_indices[laneIndex] = index;
for (int i = 1; i < num_lanes; ++i) {
laneIndex = kLaneOffsets[i * lane_width] / lane_width;
new_indices[laneIndex] = graph()->NewNode(
machine()->Int32Add(), index,
graph()->NewNode(
common()->Int32Constant(static_cast<int>(i) * lane_width)));
}
}
void SimdScalarLowering::LowerLoadOp(Node* node, SimdType type) {
MachineRepresentation rep = LoadRepresentationOf(node->op()).representation();
const Operator* load_op;
switch (node->opcode()) {
case IrOpcode::kLoad:
load_op = machine()->Load(MachineTypeFrom(type));
break;
case IrOpcode::kUnalignedLoad:
load_op = machine()->UnalignedLoad(MachineTypeFrom(type));
break;
case IrOpcode::kProtectedLoad:
load_op = machine()->ProtectedLoad(MachineTypeFrom(type));
break;
default:
UNREACHABLE();
}
if (rep == MachineRepresentation::kSimd128) {
Node* base = node->InputAt(0);
Node* index = node->InputAt(1);
int num_lanes = NumLanes(type);
Node** indices = zone()->NewArray<Node*>(num_lanes);
GetIndexNodes(index, indices, type);
Node** rep_nodes = zone()->NewArray<Node*>(num_lanes);
rep_nodes[0] = node;
rep_nodes[0]->ReplaceInput(1, indices[0]);
NodeProperties::ChangeOp(rep_nodes[0], load_op);
if (node->InputCount() > 2) {
DCHECK_LT(3, node->InputCount());
Node* effect_input = node->InputAt(2);
Node* control_input = node->InputAt(3);
for (int i = num_lanes - 1; i > 0; --i) {
rep_nodes[i] = graph()->NewNode(load_op, base, indices[i], effect_input,
control_input);
effect_input = rep_nodes[i];
}
rep_nodes[0]->ReplaceInput(2, rep_nodes[1]);
} else {
for (int i = 1; i < num_lanes; ++i) {
rep_nodes[i] = graph()->NewNode(load_op, base, indices[i]);
}
}
ReplaceNode(node, rep_nodes, num_lanes);
} else {
DefaultLowering(node);
}
}
void SimdScalarLowering::LowerLoadTransformOp(Node* node, SimdType type) {
LoadTransformParameters params = LoadTransformParametersOf(node->op());
MachineType load_rep = MachineType::None();
SimdType load_type = type;
// Load extends have a different machine type for loading.
switch (params.transformation) {
case LoadTransformation::kS128Load8x8S:
load_rep = MachineType::Int8();
load_type = SimdType::kInt8x16;
break;
case LoadTransformation::kS128Load8x8U:
load_rep = MachineType::Uint8();
load_type = SimdType::kInt8x16;
break;
case LoadTransformation::kS128Load16x4S:
load_rep = MachineType::Int16();
load_type = SimdType::kInt16x8;
break;
case LoadTransformation::kS128Load16x4U:
load_rep = MachineType::Uint16();
load_type = SimdType::kInt16x8;
break;
case LoadTransformation::kS128Load32x2S:
load_rep = MachineType::Int32();
load_type = SimdType::kInt32x4;
break;
case LoadTransformation::kS128Load32x2U:
load_rep = MachineType::Uint32();
load_type = SimdType::kInt32x4;
break;
case LoadTransformation::kS128Load8Splat:
case LoadTransformation::kS128Load16Splat:
case LoadTransformation::kS128Load32Splat:
case LoadTransformation::kS128Load64Splat:
case LoadTransformation::kS128Load32Zero:
case LoadTransformation::kS128Load64Zero:
load_rep = MachineTypeFrom(type);
break;
default:
UNREACHABLE();
}
DCHECK_NE(load_rep, MachineType::None());
const Operator* load_op;
switch (params.kind) {
case MemoryAccessKind::kNormal:
load_op = machine()->Load(load_rep);
break;
case MemoryAccessKind::kUnaligned:
load_op = machine()->UnalignedLoad(load_rep);
break;
case MemoryAccessKind::kProtected:
load_op = machine()->ProtectedLoad(load_rep);
break;
}
Node* base = node->InputAt(0);
Node* index = node->InputAt(1);
int num_lanes = NumLanes(type);
Node** reps = zone()->NewArray<Node*>(num_lanes);
Node* effect_input = node->InputAt(2);
Node* control_input = node->InputAt(3);
// This node is also used as effect input into other nodes, so we need to
// change this node in place.
reps[0] = node;
NodeProperties::ChangeOp(reps[0], load_op);
if (type != load_type) {
// We load a smaller lane size, then extend to a larger lane size. So use
// the smaller lane size to calculte the index nodes for loads, but only
// actually load half of those lanes.
Node** indices = zone()->NewArray<Node*>(num_lanes * 2);
GetIndexNodes(index, indices, load_type);
reps[0]->ReplaceInput(1, indices[0]);
for (int i = num_lanes - 1; i > 0; --i) {
reps[i] = graph()->NewNode(load_op, base, indices[i], effect_input,
control_input);
effect_input = reps[i];
}
} else {
if (params.transformation == LoadTransformation::kS128Load32Zero) {
for (int i = num_lanes - 1; i > 0; --i) {
reps[i] = mcgraph_->Int32Constant(0);
}
} else if (params.transformation == LoadTransformation::kS128Load64Zero) {
for (int i = num_lanes - 1; i > 0; --i) {
reps[i] = mcgraph_->Int64Constant(0);
}
} else {
// Load splat, load from the same index for every lane.
for (int i = num_lanes - 1; i > 0; --i) {
reps[i] =
graph()->NewNode(load_op, base, index, effect_input, control_input);
effect_input = reps[i];
}
}
}
// Update the effect input, completing the effect chain, but only if there is
// an effect output (LoadZero does not have an effect output, it is zero).
if (reps[1]->op()->EffectOutputCount() > 0) {
reps[0]->ReplaceInput(2, reps[1]);
}
// Special case, the load nodes need to be sign extended, and we do it here so
// the loop above can connect all the effect edges correctly.
if (params.transformation == LoadTransformation::kS128Load32x2S) {
for (int i = 0; i < num_lanes; ++i) {
reps[i] = graph()->NewNode(machine()->ChangeInt32ToInt64(), reps[i]);
}
} else if (params.transformation == LoadTransformation::kS128Load32x2U) {
for (int i = 0; i < num_lanes; ++i) {
reps[i] = graph()->NewNode(machine()->ChangeUint32ToUint64(), reps[i]);
}
}
ReplaceNode(node, reps, num_lanes);
}
void SimdScalarLowering::LowerStoreOp(Node* node) {
// For store operation, use replacement type of its input instead of the
// one of its effected node.
DCHECK_LT(2, node->InputCount());
SimdType rep_type = ReplacementType(node->InputAt(2));
replacements_[node->id()].type = rep_type;
const Operator* store_op;
MachineRepresentation rep;
switch (node->opcode()) {
case IrOpcode::kStore: {
rep = StoreRepresentationOf(node->op()).representation();
WriteBarrierKind write_barrier_kind =
StoreRepresentationOf(node->op()).write_barrier_kind();
store_op = machine()->Store(StoreRepresentation(
MachineTypeFrom(rep_type).representation(), write_barrier_kind));
break;
}
case IrOpcode::kUnalignedStore: {
rep = UnalignedStoreRepresentationOf(node->op());
store_op =
machine()->UnalignedStore(MachineTypeFrom(rep_type).representation());
break;
}
case IrOpcode::kProtectedStore: {
rep = StoreRepresentationOf(node->op()).representation();
store_op =
machine()->ProtectedStore(MachineTypeFrom(rep_type).representation());
break;
}
default:
UNREACHABLE();
}
if (rep == MachineRepresentation::kSimd128) {
Node* base = node->InputAt(0);
Node* index = node->InputAt(1);
int num_lanes = NumLanes(rep_type);
Node** indices = zone()->NewArray<Node*>(num_lanes);
GetIndexNodes(index, indices, rep_type);
Node* value = node->InputAt(2);
DCHECK(HasReplacement(1, value));
Node** rep_nodes = zone()->NewArray<Node*>(num_lanes);
rep_nodes[0] = node;
Node** rep_inputs = GetReplacementsWithType(value, rep_type);
rep_nodes[0]->ReplaceInput(2, rep_inputs[0]);
rep_nodes[0]->ReplaceInput(1, indices[0]);
NodeProperties::ChangeOp(node, store_op);
if (node->InputCount() > 3) {
DCHECK_LT(4, node->InputCount());
Node* effect_input = node->InputAt(3);
Node* control_input = node->InputAt(4);
for (int i = num_lanes - 1; i > 0; --i) {
rep_nodes[i] =
graph()->NewNode(store_op, base, indices[i], rep_inputs[i],
effect_input, control_input);
effect_input = rep_nodes[i];
}
rep_nodes[0]->ReplaceInput(3, rep_nodes[1]);
} else {
for (int i = 1; i < num_lanes; ++i) {
rep_nodes[i] =
graph()->NewNode(store_op, base, indices[i], rep_inputs[i]);
}
}
ReplaceNode(node, rep_nodes, num_lanes);
} else {
DefaultLowering(node);
}
}
void SimdScalarLowering::LowerBinaryOp(Node* node, SimdType input_rep_type,
const Operator* op,
bool not_horizontal) {
DCHECK_EQ(2, node->InputCount());
Node** rep_left = GetReplacementsWithType(node->InputAt(0), input_rep_type);
Node** rep_right = GetReplacementsWithType(node->InputAt(1), input_rep_type);
int num_lanes = NumLanes(input_rep_type);
Node** rep_node = zone()->NewArray<Node*>(num_lanes);
if (not_horizontal) {
for (int i = 0; i < num_lanes; ++i) {
rep_node[i] = graph()->NewNode(op, rep_left[i], rep_right[i]);
}
} else {
for (int i = 0; i < num_lanes / 2; ++i) {
rep_node[i] = graph()->NewNode(op, rep_left[i * 2], rep_left[i * 2 + 1]);
rep_node[i + num_lanes / 2] =
graph()->NewNode(op, rep_right[i * 2], rep_right[i * 2 + 1]);
}
}
ReplaceNode(node, rep_node, num_lanes);
}
void SimdScalarLowering::LowerCompareOp(Node* node, SimdType input_rep_type,
const Operator* op,
bool invert_inputs) {
DCHECK_EQ(2, node->InputCount());
Node** rep_left = GetReplacementsWithType(node->InputAt(0), input_rep_type);
Node** rep_right = GetReplacementsWithType(node->InputAt(1), input_rep_type);
int num_lanes = NumLanes(input_rep_type);
Node** rep_node = zone()->NewArray<Node*>(num_lanes);
for (int i = 0; i < num_lanes; ++i) {
Node* cmp_result = nullptr;
if (invert_inputs) {
cmp_result = graph()->NewNode(op, rep_right[i], rep_left[i]);
} else {
cmp_result = graph()->NewNode(op, rep_left[i], rep_right[i]);
}
Diamond d_cmp(graph(), common(), cmp_result);
rep_node[i] = ConstructPhiForComparison(d_cmp, input_rep_type, -1, 0);
}
ReplaceNode(node, rep_node, num_lanes);
}
Node* SimdScalarLowering::FixUpperBits(Node* input, int32_t shift) {
return graph()->NewNode(machine()->Word32Sar(),
graph()->NewNode(machine()->Word32Shl(), input,
mcgraph_->Int32Constant(shift)),
mcgraph_->Int32Constant(shift));
}
void SimdScalarLowering::LowerBinaryOpForSmallInt(Node* node,
SimdType input_rep_type,
const Operator* op,
bool not_horizontal) {
DCHECK_EQ(2, node->InputCount());
DCHECK(input_rep_type == SimdType::kInt16x8 ||
input_rep_type == SimdType::kInt8x16);
Node** rep_left = GetReplacementsWithType(node->InputAt(0), input_rep_type);
Node** rep_right = GetReplacementsWithType(node->InputAt(1), input_rep_type);
int num_lanes = NumLanes(input_rep_type);
Node** rep_node = zone()->NewArray<Node*>(num_lanes);
int32_t shift_val =
(input_rep_type == SimdType::kInt16x8) ? kShift16 : kShift8;
if (not_horizontal) {
for (int i = 0; i < num_lanes; ++i) {
rep_node[i] = FixUpperBits(
graph()->NewNode(op, rep_left[i], rep_right[i]), shift_val);
}
} else {
for (int i = 0; i < num_lanes / 2; ++i) {
rep_node[i] = FixUpperBits(
graph()->NewNode(op, rep_left[i * 2], rep_left[i * 2 + 1]),
shift_val);
rep_node[i + num_lanes / 2] = FixUpperBits(
graph()->NewNode(op, rep_right[i * 2], rep_right[i * 2 + 1]),
shift_val);
}
}
ReplaceNode(node, rep_node, num_lanes);
}
Node* SimdScalarLowering::Mask(Node* input, int32_t mask) {
return graph()->NewNode(machine()->Word32And(), input,
mcgraph_->Int32Constant(mask));
}
void SimdScalarLowering::LowerSaturateBinaryOp(Node* node,
SimdType input_rep_type,
const Operator* op,
bool is_signed) {
DCHECK_EQ(2, node->InputCount());
DCHECK(input_rep_type == SimdType::kInt16x8 ||
input_rep_type == SimdType::kInt8x16);
Node** rep_left = GetReplacementsWithType(node->InputAt(0), input_rep_type);
Node** rep_right = GetReplacementsWithType(node->InputAt(1), input_rep_type);
int32_t min = 0;
int32_t max = 0;
int32_t mask = 0;
int32_t shift_val = 0;
MachineRepresentation phi_rep;
if (input_rep_type == SimdType::kInt16x8) {
if (is_signed) {
min = std::numeric_limits<int16_t>::min();
max = std::numeric_limits<int16_t>::max();
} else {
min = std::numeric_limits<uint16_t>::min();
max = std::numeric_limits<uint16_t>::max();
}
mask = kMask16;
shift_val = kShift16;
phi_rep = MachineRepresentation::kWord16;
} else {
if (is_signed) {
min = std::numeric_limits<int8_t>::min();
max = std::numeric_limits<int8_t>::max();
} else {
min = std::numeric_limits<uint8_t>::min();
max = std::numeric_limits<uint8_t>::max();
}
mask = kMask8;
shift_val = kShift8;
phi_rep = MachineRepresentation::kWord8;
}
int num_lanes = NumLanes(input_rep_type);
Node** rep_node = zone()->NewArray<Node*>(num_lanes);
for (int i = 0; i < num_lanes; ++i) {
Node* op_result = nullptr;
Node* left = is_signed ? rep_left[i] : Mask(rep_left[i], mask);
Node* right = is_signed ? rep_right[i] : Mask(rep_right[i], mask);
op_result = graph()->NewNode(op, left, right);
Diamond d_min(graph(), common(),
graph()->NewNode(machine()->Int32LessThan(), op_result,
mcgraph_->Int32Constant(min)));
rep_node[i] = d_min.Phi(phi_rep, mcgraph_->Int32Constant(min), op_result);
Diamond d_max(graph(), common(),
graph()->NewNode(machine()->Int32LessThan(),
mcgraph_->Int32Constant(max), rep_node[i]));
rep_node[i] = d_max.Phi(phi_rep, mcgraph_->Int32Constant(max), rep_node[i]);
rep_node[i] =
is_signed ? rep_node[i] : FixUpperBits(rep_node[i], shift_val);
}
ReplaceNode(node, rep_node, num_lanes);
}
void SimdScalarLowering::LowerUnaryOp(Node* node, SimdType input_rep_type,
const Operator* op) {
DCHECK_EQ(1, node->InputCount());
Node** rep = GetReplacementsWithType(node->InputAt(0), input_rep_type);
int num_lanes = NumLanes(input_rep_type);
Node** rep_node = zone()->NewArray<Node*>(num_lanes);
for (int i = 0; i < num_lanes; ++i) {
rep_node[i] = graph()->NewNode(op, rep[i]);
}
ReplaceNode(node, rep_node, num_lanes);
}
void SimdScalarLowering::LowerIntMinMax(Node* node, const Operator* op,
bool is_max, SimdType type) {
DCHECK_EQ(2, node->InputCount());
Node** rep_left = GetReplacementsWithType(node->InputAt(0), type);
Node** rep_right = GetReplacementsWithType(node->InputAt(1), type);
int num_lanes = NumLanes(type);
Node** rep_node = zone()->NewArray<Node*>(num_lanes);
MachineRepresentation rep = MachineRepresentation::kNone;
if (type == SimdType::kInt32x4) {
rep = MachineRepresentation::kWord32;
} else if (type == SimdType::kInt16x8) {
rep = MachineRepresentation::kWord16;
} else if (type == SimdType::kInt8x16) {
rep = MachineRepresentation::kWord8;
} else {
UNREACHABLE();
}
for (int i = 0; i < num_lanes; ++i) {
Diamond d(graph(), common(),
graph()->NewNode(op, rep_left[i], rep_right[i]));
if (is_max) {
rep_node[i] = d.Phi(rep, rep_right[i], rep_left[i]);
} else {
rep_node[i] = d.Phi(rep, rep_left[i], rep_right[i]);
}
}
ReplaceNode(node, rep_node, num_lanes);
}
Node* SimdScalarLowering::BuildF64Trunc(Node* input) {
if (machine()->Float64RoundTruncate().IsSupported()) {
return graph()->NewNode(machine()->Float64RoundTruncate().op(), input);
} else {
ExternalReference ref = ExternalReference::wasm_f64_trunc();
Node* stack_slot =
graph()->NewNode(machine()->StackSlot(MachineRepresentation::kFloat64));
const Operator* store_op = machine()->Store(
StoreRepresentation(MachineRepresentation::kFloat64, kNoWriteBarrier));
Node* effect =
graph()->NewNode(store_op, stack_slot, mcgraph_->Int32Constant(0),
input, graph()->start(), graph()->start());
Node* function = graph()->NewNode(common()->ExternalConstant(ref));
Node** args = zone()->NewArray<Node*>(4);
args[0] = function;
args[1] = stack_slot;
args[2] = effect;
args[3] = graph()->start();
Signature<MachineType>::Builder sig_builder(zone(), 0, 1);
sig_builder.AddParam(MachineType::Pointer());
auto call_descriptor =
Linkage::GetSimplifiedCDescriptor(zone(), sig_builder.Build());
Node* call = graph()->NewNode(common()->Call(call_descriptor), 4, args);
return graph()->NewNode(machine()->Load(LoadRepresentation::Float64()),
stack_slot, mcgraph_->Int32Constant(0), call,
graph()->start());
}
}
void SimdScalarLowering::LowerConvertFromFloat(Node* node, bool is_signed) {
DCHECK_EQ(1, node->InputCount());
Node** rep = GetReplacementsWithType(node->InputAt(0), SimdType::kFloat32x4);
Node* rep_node[kNumLanes32];
Node* double_zero = graph()->NewNode(common()->Float64Constant(0.0));
Node* min = graph()->NewNode(
common()->Float64Constant(static_cast<double>(is_signed ? kMinInt : 0)));
Node* max = graph()->NewNode(common()->Float64Constant(
static_cast<double>(is_signed ? kMaxInt : 0xFFFFFFFFu)));
for (int i = 0; i < kNumLanes32; ++i) {
Node* double_rep =
graph()->NewNode(machine()->ChangeFloat32ToFloat64(), rep[i]);
Diamond nan_d(
graph(), common(),
graph()->NewNode(machine()->Float64Equal(), double_rep, double_rep));
Node* temp =
nan_d.Phi(MachineRepresentation::kFloat64, double_rep, double_zero);
Diamond min_d(graph(), common(),
graph()->NewNode(machine()->Float64LessThan(), temp, min));
temp = min_d.Phi(MachineRepresentation::kFloat64, min, temp);
Diamond max_d(graph(), common(),
graph()->NewNode(machine()->Float64LessThan(), max, temp));
temp = max_d.Phi(MachineRepresentation::kFloat64, max, temp);
Node* trunc = BuildF64Trunc(temp);
if (is_signed) {
rep_node[i] = graph()->NewNode(machine()->ChangeFloat64ToInt32(), trunc);
} else {
rep_node[i] =
graph()->NewNode(machine()->TruncateFloat64ToUint32(), trunc);
}
}
ReplaceNode(node, rep_node, kNumLanes32);
}
void SimdScalarLowering::LowerConvertFromInt(Node* node,
SimdType input_rep_type,
SimdType output_rep_type,
bool is_signed, int start_index) {
DCHECK_EQ(1, node->InputCount());
Node** rep = GetReplacementsWithType(node->InputAt(0), input_rep_type);
int32_t mask = 0;
if (input_rep_type == SimdType::kInt16x8) {
DCHECK_EQ(output_rep_type, SimdType::kInt32x4);
mask = kMask16;
} else {
DCHECK_EQ(output_rep_type, SimdType::kInt16x8);
DCHECK_EQ(input_rep_type, SimdType::kInt8x16);
mask = kMask8;
}
int num_lanes = NumLanes(output_rep_type);
Node** rep_node = zone()->NewArray<Node*>(num_lanes);
for (int i = 0; i < num_lanes; ++i) {
rep_node[i] =
is_signed ? rep[i + start_index] : Mask(rep[i + start_index], mask);
}
ReplaceNode(node, rep_node, num_lanes);
}
void SimdScalarLowering::LowerPack(Node* node, SimdType input_rep_type,
SimdType output_rep_type, bool is_signed) {
DCHECK_EQ(2, node->InputCount());
Node** rep_left = GetReplacementsWithType(node->InputAt(0), input_rep_type);
Node** rep_right = GetReplacementsWithType(node->InputAt(1), input_rep_type);
const Operator* less_op = machine()->Int32LessThan();
Node* min = nullptr;
Node* max = nullptr;
const Operator* sign_extend;
MachineRepresentation phi_rep;
if (output_rep_type == SimdType::kInt16x8) {
sign_extend = machine()->SignExtendWord16ToInt32();
DCHECK(input_rep_type == SimdType::kInt32x4);
if (is_signed) {
min = mcgraph_->Int32Constant(std::numeric_limits<int16_t>::min());
max = mcgraph_->Int32Constant(std::numeric_limits<int16_t>::max());
} else {
min = mcgraph_->Uint32Constant(std::numeric_limits<uint16_t>::min());
max = mcgraph_->Uint32Constant(std::numeric_limits<uint16_t>::max());
}
phi_rep = MachineRepresentation::kWord16;
} else {
sign_extend = machine()->SignExtendWord8ToInt32();
DCHECK(output_rep_type == SimdType::kInt8x16 &&
input_rep_type == SimdType::kInt16x8);
if (is_signed) {
min = mcgraph_->Int32Constant(std::numeric_limits<int8_t>::min());
max = mcgraph_->Int32Constant(std::numeric_limits<int8_t>::max());
} else {
min = mcgraph_->Uint32Constant(std::numeric_limits<uint8_t>::min());
max = mcgraph_->Uint32Constant(std::numeric_limits<uint8_t>::max());
}
phi_rep = MachineRepresentation::kWord8;
}
int num_lanes = NumLanes(output_rep_type);
Node** rep_node = zone()->NewArray<Node*>(num_lanes);
for (int i = 0; i < num_lanes; ++i) {
Node* input = nullptr;
if (i < num_lanes / 2)
input = rep_left[i];
else
input = rep_right[i - num_lanes / 2];
Diamond d_min(graph(), common(), graph()->NewNode(less_op, input, min));
input = d_min.Phi(phi_rep, min, input);
Diamond d_max(graph(), common(), graph()->NewNode(less_op, max, input));
// We keep nodes in sign-extended form. E.g. for uint8_t, we need to
// compare with 0x000000ff (saturated narrowing), but the result of
// conversion should be 0xffffffff to work well with the rest of lowering.
rep_node[i] = graph()->NewNode(sign_extend, d_max.Phi(phi_rep, max, input));
}
ReplaceNode(node, rep_node, num_lanes);
}
void SimdScalarLowering::LowerShiftOp(Node* node, SimdType type) {
DCHECK_EQ(2, node->InputCount());
// The shift node, if it has a replacement, should be a single scalar.
DCHECK_GE(1, ReplacementCount(node->InputAt(1)));
Node* val = (HasReplacement(0, node->InputAt(1)))
? GetReplacements(node->InputAt(1))[0]
: node->InputAt(1);
Node* shift_node = Mask(val, GetMaskForShift(node));
Node** rep = GetReplacementsWithType(node->InputAt(0), type);
int num_lanes = NumLanes(type);
Node** rep_node = zone()->NewArray<Node*>(num_lanes);
for (int i = 0; i < num_lanes; ++i) {
rep_node[i] = rep[i];
switch (node->opcode()) {
case IrOpcode::kI8x16ShrU:
rep_node[i] = Mask(rep_node[i], kMask8);
rep_node[i] =
graph()->NewNode(machine()->Word32Shr(), rep_node[i], shift_node);
break;
case IrOpcode::kI16x8ShrU:
rep_node[i] = Mask(rep_node[i], kMask16);
V8_FALLTHROUGH;
case IrOpcode::kI32x4ShrU:
rep_node[i] =
graph()->NewNode(machine()->Word32Shr(), rep_node[i], shift_node);
break;
case IrOpcode::kI64x2ShrU:
rep_node[i] =
graph()->NewNode(machine()->Word64Shr(), rep_node[i], shift_node);
break;
case IrOpcode::kI64x2Shl:
rep_node[i] =
graph()->NewNode(machine()->Word64Shl(), rep_node[i], shift_node);
break;
case IrOpcode::kI32x4Shl:
rep_node[i] =
graph()->NewNode(machine()->Word32Shl(), rep_node[i], shift_node);
break;
case IrOpcode::kI16x8Shl:
rep_node[i] =
graph()->NewNode(machine()->Word32Shl(), rep_node[i], shift_node);
rep_node[i] = FixUpperBits(rep_node[i], kShift16);
break;
case IrOpcode::kI8x16Shl:
rep_node[i] =
graph()->NewNode(machine()->Word32Shl(), rep_node[i], shift_node);
rep_node[i] = FixUpperBits(rep_node[i], kShift8);
break;
case IrOpcode::kI64x2ShrS:
rep_node[i] =
graph()->NewNode(machine()->Word64Sar(), rep_node[i], shift_node);
break;
case IrOpcode::kI32x4ShrS:
case IrOpcode::kI16x8ShrS:
case IrOpcode::kI8x16ShrS:
rep_node[i] =
graph()->NewNode(machine()->Word32Sar(), rep_node[i], shift_node);
break;
default:
UNREACHABLE();
}
}
ReplaceNode(node, rep_node, num_lanes);
}
Node* SimdScalarLowering::ConstructPhiForComparison(Diamond d,
SimdType rep_type,
int true_value,
int false_value) {
// Close the given Diamond d using a Phi node, taking care of constructing the
// right kind of constants (Int32 or Int64) based on rep_type.
if (rep_type == SimdType::kFloat64x2) {
MachineRepresentation rep = MachineRepresentation::kWord64;
return d.Phi(rep, mcgraph_->Int64Constant(true_value),
mcgraph_->Int64Constant(false_value));
} else {
MachineRepresentation rep =
(rep_type == SimdType::kFloat32x4)
? MachineRepresentation::kWord32
: MachineTypeFrom(rep_type).representation();
return d.Phi(rep, mcgraph_->Int32Constant(true_value),
mcgraph_->Int32Constant(false_value));
}
}
void SimdScalarLowering::LowerNotEqual(Node* node, SimdType input_rep_type,
const Operator* op) {
DCHECK_EQ(2, node->InputCount());
Node** rep_left = GetReplacementsWithType(node->InputAt(0), input_rep_type);
Node** rep_right = GetReplacementsWithType(node->InputAt(1), input_rep_type);
int num_lanes = NumLanes(input_rep_type);
Node** rep_node = zone()->NewArray<Node*>(num_lanes);
for (int i = 0; i < num_lanes; ++i) {
Diamond d(graph(), common(),
graph()->NewNode(op, rep_left[i], rep_right[i]));
rep_node[i] = ConstructPhiForComparison(d, input_rep_type, 0, -1);
}
ReplaceNode(node, rep_node, num_lanes);
}
void SimdScalarLowering::LowerBitMaskOp(Node* node, SimdType rep_type,
int msb_index) {
Node** reps = GetReplacementsWithType(node->InputAt(0), rep_type);
int num_lanes = NumLanes(rep_type);
Node** rep_node = zone()->NewArray<Node*>(1);
Node* result = mcgraph_->Int32Constant(0);
uint32_t mask = 1 << msb_index;
for (int i = 0; i < num_lanes; ++i) {
// Lane i should end up at bit i in the final result.
// +-----------------------------------------------------------------+
// | | msb_index | (i < msb_index) | (i > msb_index) |
// +-------+-----------+----------------------+----------------------+
// | i8x16 | 7 | msb >> (msb_index-i) | msb << (i-msb_index) |
// | i16x8 | 15 | msb >> (msb_index-i) | n/a |
// | i32x4 | 31 | msb >> (msb_index-i) | n/a |
// +-------+-----------+----------------------+----------------------+
Node* msb = Mask(reps[i], mask);
if (i < msb_index) {
int shift = msb_index - i;
Node* shifted = graph()->NewNode(machine()->Word32Shr(), msb,
mcgraph_->Int32Constant(shift));
result = graph()->NewNode(machine()->Word32Or(), shifted, result);
} else if (i > msb_index) {
int shift = i - msb_index;
Node* shifted = graph()->NewNode(machine()->Word32Shl(), msb,
mcgraph_->Int32Constant(shift));
result = graph()->NewNode(machine()->Word32Or(), shifted, result);
} else {
result = graph()->NewNode(machine()->Word32Or(), msb, result);
}
}
rep_node[0] = result;
ReplaceNode(node, rep_node, 1);
}
void SimdScalarLowering::LowerAllTrueOp(Node* node, SimdType rep_type) {
// AllTrue ops require the input to be of a particular SimdType, but the op
// itself is always replaced by a Int32x4 with 1 node.
int num_lanes = NumLanes(rep_type);
DCHECK_EQ(1, node->InputCount());
Node** rep = GetReplacementsWithType(node->InputAt(0), rep_type);
Node** rep_node = zone()->NewArray<Node*>(num_lanes);
Node* zero = mcgraph_->Int32Constant(0);
Node* tmp_result = mcgraph_->Int32Constant(1);
for (int i = 0; i < num_lanes; ++i) {
Diamond d(graph(), common(),
graph()->NewNode(machine()->Word32Equal(), rep[i], zero));
tmp_result = d.Phi(MachineRepresentation::kWord32, zero, tmp_result);
}
rep_node[0] = tmp_result;
ReplaceNode(node, rep_node, 1);
}
void SimdScalarLowering::LowerFloatPseudoMinMax(Node* node, const Operator* op,
bool is_max, SimdType type) {
DCHECK_EQ(2, node->InputCount());
Node** rep_left = GetReplacementsWithType(node->InputAt(0), type);
Node** rep_right = GetReplacementsWithType(node->InputAt(1), type);
int num_lanes = NumLanes(type);
Node** rep_node = zone()->NewArray<Node*>(num_lanes);
MachineRepresentation rep = MachineTypeFrom(type).representation();
for (int i = 0; i < num_lanes; ++i) {
Node* cmp = is_max ? graph()->NewNode(op, rep_left[i], rep_right[i])
: graph()->NewNode(op, rep_right[i], rep_left[i]);
Diamond d(graph(), common(), cmp);
rep_node[i] = d.Phi(rep, rep_right[i], rep_left[i]);
}
ReplaceNode(node, rep_node, num_lanes);
}
void SimdScalarLowering::LowerNode(Node* node) {
SimdType rep_type = ReplacementType(node);
int num_lanes = NumLanes(rep_type);
switch (node->opcode()) {
case IrOpcode::kS128Const: {
// We could use GetReplacementsWithType for all this, but it adds a lot of
// nodes, so sign extend the immediates ourselves here.
DCHECK_EQ(0, node->InputCount());
Node** rep_node = zone()->NewArray<Node*>(num_lanes);
S128ImmediateParameter params = S128ImmediateParameterOf(node->op());
// For all the small ints below, we have a choice of static_cast or bit
// twiddling, clang seems to be able to optimize either
// (https://godbolt.org/z/9c65o8) so use static_cast for clarity.
switch (rep_type) {
case SimdType::kInt8x16: {
for (int i = 0; i < num_lanes; ++i) {
Address data_address = reinterpret_cast<Address>(params.data() + i);
rep_node[i] = mcgraph_->Int32Constant(static_cast<int32_t>(
base::ReadLittleEndianValue<int8_t>(data_address)));
}
break;
}
case SimdType::kInt16x8: {
int16_t val[kNumLanes16];
memcpy(val, params.data(), kSimd128Size);
for (int i = 0; i < num_lanes; ++i) {
rep_node[i] = mcgraph_->Int32Constant(static_cast<int32_t>(
base::ReadLittleEndianValue<int16_t>(&val[i])));
}
break;
}
case SimdType::kInt32x4: {
uint32_t val[kNumLanes32];
memcpy(val, params.data(), kSimd128Size);
for (int i = 0; i < num_lanes; ++i) {
rep_node[i] = mcgraph_->Int32Constant(
base::ReadLittleEndianValue<uint32_t>(&val[i]));
}
break;
}
case SimdType::kInt64x2: {
uint64_t val[kNumLanes64];
memcpy(val, params.data(), kSimd128Size);
for (int i = 0; i < num_lanes; ++i) {
rep_node[i] = mcgraph_->Int64Constant(
base::ReadLittleEndianValue<uint64_t>(&val[i]));
}
break;
}
case SimdType::kFloat32x4: {
float val[kNumLanes32];
memcpy(val, params.data(), kSimd128Size);
for (int i = 0; i < num_lanes; ++i) {
rep_node[i] = mcgraph_->Float32Constant(
base::ReadLittleEndianValue<float>(&val[i]));
}
break;
}
case SimdType::kFloat64x2: {
double val[kNumLanes64];
memcpy(val, params.data(), kSimd128Size);
for (int i = 0; i < num_lanes; ++i) {
rep_node[i] = mcgraph_->Float64Constant(
base::ReadLittleEndianValue<double>(&val[i]));
}
break;
}
}
ReplaceNode(node, rep_node, num_lanes);
break;
}
case IrOpcode::kStart: {
int parameter_count = GetParameterCountAfterLowering();
// Only exchange the node if the parameter count actually changed.
if (parameter_count != static_cast<int>(signature()->parameter_count())) {
int delta =
parameter_count - static_cast<int>(signature()->parameter_count());
int new_output_count = node->op()->ValueOutputCount() + delta;
NodeProperties::ChangeOp(node, common()->Start(new_output_count));
}
break;
}
case IrOpcode::kParameter: {
DCHECK_EQ(1, node->InputCount());
int param_count = static_cast<int>(signature()->parameter_count());
// Only exchange the node if the parameter count actually changed. We do
// not even have to do the default lowering because the start node,
// the only input of a parameter node, only changes if the parameter count
// changes.
if (GetParameterCountAfterLowering() != param_count) {
int old_index = ParameterIndexOf(node->op());
// Parameter index 0 is the instance parameter, we will use old_index to
// index into the function signature, so we need to decrease it by 1.
--old_index;
int new_index =
GetParameterIndexAfterLoweringSimd128(signature(), old_index);
// Similarly, the index into function signature needs to account for the
// instance parameter, so increase it by 1.
++new_index;
NodeProperties::ChangeOp(node, common()->Parameter(new_index));
if (old_index < 0) {
break;
}
DCHECK(old_index < param_count);
if (signature()->GetParam(old_index) ==
MachineRepresentation::kSimd128) {
Node* new_node[kNumLanes32];
new_node[0] = node;
for (int i = 1; i < kNumLanes32; ++i) {
new_node[i] = graph()->NewNode(common()->Parameter(new_index + i),
graph()->start());
}
ReplaceNode(node, new_node, kNumLanes32);
}
}
break;
}
case IrOpcode::kSimd128ReverseBytes: {
DCHECK_EQ(1, node->InputCount());
SimdType input_type = ReplacementType(node->InputAt(0));
bool is_float = input_type == SimdType::kFloat32x4 ||
input_type == SimdType::kFloat64x2;
replacements_[node->id()].type =
is_float ? SimdType::kFloat32x4 : SimdType::kInt32x4;
Node** rep = GetReplacementsWithType(
node->InputAt(0),
is_float ? SimdType::kFloat32x4 : SimdType::kInt32x4);
Node* rep_node[kNumLanes32];
for (int i = 0; i < kNumLanes32; ++i) {
Node* temp = is_float ? graph()->NewNode(
machine()->BitcastFloat32ToInt32(), rep[i])
: rep[i];
temp = graph()->NewNode(machine()->Word32ReverseBytes(), temp);
rep_node[kNumLanes32 - 1 - i] =
is_float
? graph()->NewNode(machine()->BitcastInt32ToFloat32(), temp)
: temp;
}
ReplaceNode(node, rep_node, kNumLanes32);
break;
}
case IrOpcode::kLoad:
case IrOpcode::kUnalignedLoad:
case IrOpcode::kProtectedLoad: {
LowerLoadOp(node, rep_type);
break;
}
case IrOpcode::kLoadTransform: {
LowerLoadTransformOp(node, rep_type);
break;
}
case IrOpcode::kStore:
case IrOpcode::kUnalignedStore:
case IrOpcode::kProtectedStore: {
LowerStoreOp(node);
break;
}
case IrOpcode::kReturn: {
int old_input_count = node->InputCount();
int return_arity = static_cast<int>(signature()->return_count());
for (int i = 0; i < return_arity; i++) {
if (signature()->GetReturn(i) != MachineRepresentation::kSimd128) {
continue;
}
// Return nodes have a hidden input at value 0.
Node* input = node->InputAt(i + 1);
if (!HasReplacement(0, input)) {
continue;
}
// V128 return types are lowered to i32x4.
Node** reps = GetReplacementsWithType(input, rep_type);
ReplaceNode(input, reps, NumLanes(rep_type));
}
DefaultLowering(node);
// Nothing needs to be done here since inputs did not change.
if (old_input_count == node->InputCount()) {
break;
}
int new_return_count = GetReturnCountAfterLoweringSimd128(signature());
if (static_cast<int>(signature()->return_count()) != new_return_count) {
NodeProperties::ChangeOp(node, common()->Return(new_return_count));
}
break;
}
case IrOpcode::kCall: {
// TODO(turbofan): Make wasm code const-correct wrt. CallDescriptor.
auto call_descriptor =
const_cast<CallDescriptor*>(CallDescriptorOf(node->op()));
bool returns_require_lowering =
GetReturnCountAfterLoweringSimd128(call_descriptor) !=
static_cast<int>(call_descriptor->ReturnCount());
// All call arguments are lowered to i32x4 in the call descriptor, so the
// arguments need to be converted to i32x4 as well.
for (int i = NodeProperties::PastValueIndex(node) - 1; i >= 0; i--) {
Node* input = node->InputAt(i);
if (ReplacementCount(input) == 1) {
// Special case for extract lanes
Node** reps = GetReplacements(input);
ReplaceNode(input, reps, 1);
} else if (HasReplacement(0, input)) {
Node** reps = GetReplacementsWithType(input, SimdType::kInt32x4);
ReplaceNode(input, reps, NumLanes(SimdType::kInt32x4));
}
}
if (DefaultLowering(node) || returns_require_lowering) {
// We have to adjust the call descriptor.
const Operator* op = common()->Call(
GetI32WasmCallDescriptorForSimd(zone(), call_descriptor));
NodeProperties::ChangeOp(node, op);
}
if (!returns_require_lowering) {
break;
}
size_t return_arity = call_descriptor->ReturnCount();
if (return_arity == 1) {
// We access the additional return values through projections.
// Special case for return_arity 1, with multi-returns, we would have
// already built projections for each return value, and will be handled
// by the following code.
Node* rep_node[kNumLanes32];
for (int i = 0; i < kNumLanes32; ++i) {
rep_node[i] =
graph()->NewNode(common()->Projection(i), node, graph()->start());
}
ReplaceNode(node, rep_node, kNumLanes32);
break;
}
ZoneVector<Node*> projections(return_arity, zone());
NodeProperties::CollectValueProjections(node, projections.data(),
return_arity);
for (size_t old_index = 0, new_index = 0; old_index < return_arity;
++old_index, ++new_index) {
Node* use_node = projections[old_index];
DCHECK_EQ(ProjectionIndexOf(use_node->op()), old_index);
DCHECK_EQ(GetReturnIndexAfterLowering(call_descriptor,
static_cast<int>(old_index)),
static_cast<int>(new_index));
if (new_index != old_index) {
NodeProperties::ChangeOp(use_node, common()->Projection(new_index));
}
if (call_descriptor->GetReturnType(old_index).representation() ==
MachineRepresentation::kSimd128) {
Node* rep_node[kNumLanes32];
for (int i = 0; i < kNumLanes32; ++i) {
rep_node[i] = graph()->NewNode(common()->Projection(new_index + i),
node, graph()->start());
}
ReplaceNode(use_node, rep_node, kNumLanes32);
new_index += kNumLanes32 - 1;
}
}
break;
}
case IrOpcode::kPhi: {
MachineRepresentation rep = PhiRepresentationOf(node->op());
if (rep == MachineRepresentation::kSimd128) {
// The replacement nodes have already been created, we only have to
// replace placeholder nodes.
Node** rep_node = GetReplacements(node);
for (int i = 0; i < node->op()->ValueInputCount(); ++i) {
Node** rep_input =
GetReplacementsWithType(node->InputAt(i), rep_type);
for (int j = 0; j < num_lanes; j++) {
rep_node[j]->ReplaceInput(i, rep_input[j]);
}
}
} else {
DefaultLowering(node);
}
break;
}
case IrOpcode::kI64x2Add: {
LowerBinaryOp(node, rep_type, machine()->Int64Add());
break;
}
case IrOpcode::kI64x2Sub: {
LowerBinaryOp(node, rep_type, machine()->Int64Sub());
break;
}
case IrOpcode::kI64x2Mul: {
LowerBinaryOp(node, rep_type, machine()->Int64Mul());
break;
}
#define I32X4_BINOP_CASE(opcode, instruction) \
case IrOpcode::opcode: { \
LowerBinaryOp(node, rep_type, machine()->instruction()); \
break; \
}
I32X4_BINOP_CASE(kI32x4Add, Int32Add)
I32X4_BINOP_CASE(kI32x4Sub, Int32Sub)
I32X4_BINOP_CASE(kI32x4Mul, Int32Mul)
I32X4_BINOP_CASE(kS128And, Word32And)
I32X4_BINOP_CASE(kS128Or, Word32Or)
I32X4_BINOP_CASE(kS128Xor, Word32Xor)
#undef I32X4_BINOP_CASE
case IrOpcode::kI32x4AddHoriz: {
LowerBinaryOp(node, rep_type, machine()->Int32Add(), false);
break;
}
case IrOpcode::kI16x8AddHoriz: {
LowerBinaryOpForSmallInt(node, rep_type, machine()->Int32Add(), false);
break;
}
case IrOpcode::kI16x8Add:
case IrOpcode::kI8x16Add: {
LowerBinaryOpForSmallInt(node, rep_type, machine()->Int32Add());
break;
}
case IrOpcode::kI16x8Sub:
case IrOpcode::kI8x16Sub: {
LowerBinaryOpForSmallInt(node, rep_type, machine()->Int32Sub());
break;
}
case IrOpcode::kI16x8Mul:
case IrOpcode::kI8x16Mul: {
LowerBinaryOpForSmallInt(node, rep_type, machine()->Int32Mul());
break;
}
case IrOpcode::kI16x8AddSatS:
case IrOpcode::kI8x16AddSatS: {
LowerSaturateBinaryOp(node, rep_type, machine()->Int32Add(), true);
break;
}
case IrOpcode::kI16x8SubSatS:
case IrOpcode::kI8x16SubSatS: {
LowerSaturateBinaryOp(node, rep_type, machine()->Int32Sub(), true);
break;
}
case IrOpcode::kI16x8AddSatU:
case IrOpcode::kI8x16AddSatU: {
LowerSaturateBinaryOp(node, rep_type, machine()->Int32Add(), false);
break;
}
case IrOpcode::kI16x8SubSatU:
case IrOpcode::kI8x16SubSatU: {
LowerSaturateBinaryOp(node, rep_type, machine()->Int32Sub(), false);
break;
}
case IrOpcode::kI32x4MaxS:
case IrOpcode::kI16x8MaxS:
case IrOpcode::kI8x16MaxS: {
LowerIntMinMax(node, machine()->Int32LessThan(), true, rep_type);
break;
}
case IrOpcode::kI32x4MinS:
case IrOpcode::kI16x8MinS:
case IrOpcode::kI8x16MinS: {
LowerIntMinMax(node, machine()->Int32LessThan(), false, rep_type);
break;
}
case IrOpcode::kI32x4MaxU:
case IrOpcode::kI16x8MaxU:
case IrOpcode::kI8x16MaxU: {
LowerIntMinMax(node, machine()->Uint32LessThan(), true, rep_type);
break;
}
case IrOpcode::kI32x4MinU:
case IrOpcode::kI16x8MinU:
case IrOpcode::kI8x16MinU: {
LowerIntMinMax(node, machine()->Uint32LessThan(), false, rep_type);
break;
}
case IrOpcode::kI32x4DotI16x8S: {
// i32x4.dot_i16x8_s wants the inputs to be i16x8, but outputs to i32x4.
DCHECK_EQ(2, node->InputCount());
Node** rep_left =
GetReplacementsWithType(node->InputAt(0), SimdType::kInt16x8);
Node** rep_right =
GetReplacementsWithType(node->InputAt(1), SimdType::kInt16x8);
int num_lanes = NumLanes(rep_type);
Node** rep_node = zone()->NewArray<Node*>(num_lanes);
for (int i = 0; i < num_lanes; ++i) {
Node* lo = graph()->NewNode(machine()->Int32Mul(), rep_left[i * 2],
rep_right[i * 2]);
Node* hi = graph()->NewNode(machine()->Int32Mul(), rep_left[i * 2 + 1],
rep_right[i * 2 + 1]);
rep_node[i] = graph()->NewNode(machine()->Int32Add(), lo, hi);
}
ReplaceNode(node, rep_node, num_lanes);
break;
}
case IrOpcode::kI64x2Neg: {
DCHECK_EQ(1, node->InputCount());
Node** rep = GetReplacementsWithType(node->InputAt(0), rep_type);
int num_lanes = NumLanes(rep_type);
Node** rep_node = zone()->NewArray<Node*>(num_lanes);
Node* zero = graph()->NewNode(common()->Int64Constant(0));
for (int i = 0; i < num_lanes; ++i) {
rep_node[i] = graph()->NewNode(machine()->Int64Sub(), zero, rep[i]);
}
ReplaceNode(node, rep_node, num_lanes);
break;
}
case IrOpcode::kI32x4Neg:
case IrOpcode::kI16x8Neg:
case IrOpcode::kI8x16Neg: {
DCHECK_EQ(1, node->InputCount());
Node** rep = GetReplacementsWithType(node->InputAt(0), rep_type);
int num_lanes = NumLanes(rep_type);
Node** rep_node = zone()->NewArray<Node*>(num_lanes);
Node* zero = graph()->NewNode(common()->Int32Constant(0));
for (int i = 0; i < num_lanes; ++i) {
rep_node[i] = graph()->NewNode(machine()->Int32Sub(), zero, rep[i]);
if (node->opcode() == IrOpcode::kI16x8Neg) {
rep_node[i] = FixUpperBits(rep_node[i], kShift16);
} else if (node->opcode() == IrOpcode::kI8x16Neg) {
rep_node[i] = FixUpperBits(rep_node[i], kShift8);
}
}
ReplaceNode(node, rep_node, num_lanes);
break;
}
case IrOpcode::kI32x4Abs:
case IrOpcode::kI16x8Abs:
case IrOpcode::kI8x16Abs: {
// From https://stackoverflow.com/a/14194764
// abs(x) = (x XOR y) - y
Node** rep = GetReplacementsWithType(node->InputAt(0), rep_type);
Node** rep_node = zone()->NewArray<Node*>(num_lanes);
for (int i = 0; i < num_lanes; ++i) {
// It's fine to shift by 31 even for i8x16 since each node is
// effectively expanded to 32 bits.
Node* y = graph()->NewNode(machine()->Word32Sar(), rep[i],
mcgraph_->Int32Constant(31));
rep_node[i] = graph()->NewNode(
machine()->Int32Sub(),
graph()->NewNode(machine()->Word32Xor(), rep[i], y), y);
if (node->opcode() == IrOpcode::kI16x8Neg) {
rep_node[i] = FixUpperBits(rep_node[i], kShift16);
} else if (node->opcode() == IrOpcode::kI8x16Neg) {
rep_node[i] = FixUpperBits(rep_node[i], kShift8);
}
}
ReplaceNode(node, rep_node, num_lanes);
break;
}
case IrOpcode::kS128Zero: {
DCHECK_EQ(0, node->InputCount());
Node* rep_node[kNumLanes32];
for (int i = 0; i < kNumLanes32; ++i) {
rep_node[i] = mcgraph_->Int32Constant(0);
}
ReplaceNode(node, rep_node, kNumLanes32);
break;
}
case IrOpcode::kS128Not: {
DCHECK_EQ(1, node->InputCount());
Node** rep = GetReplacementsWithType(node->InputAt(0), rep_type);
Node* rep_node[kNumLanes32];
Node* mask = graph()->NewNode(common()->Int32Constant(0xFFFFFFFF));
for (int i = 0; i < kNumLanes32; ++i) {
rep_node[i] = graph()->NewNode(machine()->Word32Xor(), rep[i], mask);
}
ReplaceNode(node, rep_node, kNumLanes32);
break;
}
case IrOpcode::kS128AndNot: {
DCHECK_EQ(2, node->InputCount());
Node** rep_left = GetReplacementsWithType(node->InputAt(0), rep_type);
Node** rep_right = GetReplacementsWithType(node->InputAt(1), rep_type);
int num_lanes = NumLanes(rep_type);
Node** rep_node = zone()->NewArray<Node*>(num_lanes);
Node* mask = graph()->NewNode(common()->Int32Constant(0xFFFFFFFF));
for (int i = 0; i < num_lanes; ++i) {
Node* not_rep_right =
graph()->NewNode(machine()->Word32Xor(), rep_right[i], mask);
rep_node[i] = graph()->NewNode(machine()->Word32And(), rep_left[i],
not_rep_right);
}
ReplaceNode(node, rep_node, num_lanes);
break;
}
case IrOpcode::kI32x4SConvertF32x4: {
LowerConvertFromFloat(node, true);
break;
}
case IrOpcode::kI32x4UConvertF32x4: {
LowerConvertFromFloat(node, false);
break;
}
case IrOpcode::kI32x4SConvertI16x8Low: {
LowerConvertFromInt(node, SimdType::kInt16x8, SimdType::kInt32x4, true,
0);
break;
}
case IrOpcode::kI32x4SConvertI16x8High: {
LowerConvertFromInt(node, SimdType::kInt16x8, SimdType::kInt32x4, true,
4);
break;
}
case IrOpcode::kI32x4UConvertI16x8Low: {
LowerConvertFromInt(node, SimdType::kInt16x8, SimdType::kInt32x4, false,
0);
break;
}
case IrOpcode::kI32x4UConvertI16x8High: {
LowerConvertFromInt(node, SimdType::kInt16x8, SimdType::kInt32x4, false,
4);
break;
}
case IrOpcode::kI16x8SConvertI8x16Low: {
LowerConvertFromInt(node, SimdType::kInt8x16, SimdType::kInt16x8, true,
0);
break;
}
case IrOpcode::kI16x8SConvertI8x16High: {
LowerConvertFromInt(node, SimdType::kInt8x16, SimdType::kInt16x8, true,
8);
break;
}
case IrOpcode::kI16x8UConvertI8x16Low: {
LowerConvertFromInt(node, SimdType::kInt8x16, SimdType::kInt16x8, false,
0);
break;
}
case IrOpcode::kI16x8UConvertI8x16High: {
LowerConvertFromInt(node, SimdType::kInt8x16, SimdType::kInt16x8, false,
8);
break;
}
case IrOpcode::kI16x8SConvertI32x4: {
LowerPack(node, SimdType::kInt32x4, SimdType::kInt16x8, true);
break;
}
case IrOpcode::kI16x8UConvertI32x4: {
LowerPack(node, SimdType::kInt32x4, SimdType::kInt16x8, false);
break;
}
case IrOpcode::kI8x16SConvertI16x8: {
LowerPack(node, SimdType::kInt16x8, SimdType::kInt8x16, true);
break;
}
case IrOpcode::kI8x16UConvertI16x8: {
LowerPack(node, SimdType::kInt16x8, SimdType::kInt8x16, false);
break;
}
case IrOpcode::kI64x2Shl:
case IrOpcode::kI32x4Shl:
case IrOpcode::kI16x8Shl:
case IrOpcode::kI8x16Shl:
case IrOpcode::kI64x2ShrS:
case IrOpcode::kI32x4ShrS:
case IrOpcode::kI16x8ShrS:
case IrOpcode::kI8x16ShrS:
case IrOpcode::kI64x2ShrU:
case IrOpcode::kI32x4ShrU:
case IrOpcode::kI16x8ShrU:
case IrOpcode::kI8x16ShrU: {
LowerShiftOp(node, rep_type);
break;
}
case IrOpcode::kF32x4AddHoriz: {
LowerBinaryOp(node, rep_type, machine()->Float32Add(), false);
break;
}
#define F32X4_BINOP_CASE(name) \
case IrOpcode::kF32x4##name: { \
LowerBinaryOp(node, rep_type, machine()->Float32##name()); \
break; \
}
F32X4_BINOP_CASE(Add)
F32X4_BINOP_CASE(Sub)
F32X4_BINOP_CASE(Mul)
F32X4_BINOP_CASE(Div)
F32X4_BINOP_CASE(Min)
F32X4_BINOP_CASE(Max)
case IrOpcode::kF32x4Pmin: {
LowerFloatPseudoMinMax(node, machine()->Float32LessThan(), false,
rep_type);
break;
}
case IrOpcode::kF32x4Pmax: {
LowerFloatPseudoMinMax(node, machine()->Float32LessThan(), true,
rep_type);
break;
}
#undef F32X4_BINOP_CASE
#define F32X4_UNOP_CASE(name) \
case IrOpcode::kF32x4##name: { \
LowerUnaryOp(node, rep_type, machine()->Float32##name()); \
break; \
}
F32X4_UNOP_CASE(Abs)
F32X4_UNOP_CASE(Neg)
F32X4_UNOP_CASE(Sqrt)
#undef F32X4_UNOP_CASE
case IrOpcode::kF32x4Ceil: {
LowerUnaryOp(node, rep_type, machine()->Float32RoundUp().op());
break;
}
case IrOpcode::kF32x4Floor: {
LowerUnaryOp(node, rep_type, machine()->Float32RoundDown().op());
break;
}
case IrOpcode::kF32x4Trunc: {
LowerUnaryOp(node, rep_type, machine()->Float32RoundTruncate().op());
break;
}
case IrOpcode::kF32x4NearestInt: {
LowerUnaryOp(node, rep_type, machine()->Float32RoundTiesEven().op());
break;
}
case IrOpcode::kF32x4RecipApprox:
case IrOpcode::kF32x4RecipSqrtApprox: {
DCHECK_EQ(1, node->InputCount());
Node** rep = GetReplacementsWithType(node->InputAt(0), rep_type);
Node** rep_node = zone()->NewArray<Node*>(num_lanes);
Node* float_one = graph()->NewNode(common()->Float32Constant(1.0));
for (int i = 0; i < num_lanes; ++i) {
Node* tmp = rep[i];
if (node->opcode() == IrOpcode::kF32x4RecipSqrtApprox) {
tmp = graph()->NewNode(machine()->Float32Sqrt(), rep[i]);
}
rep_node[i] = graph()->NewNode(machine()->Float32Div(), float_one, tmp);
}
ReplaceNode(node, rep_node, num_lanes);
break;
}
case IrOpcode::kF32x4SConvertI32x4: {
LowerUnaryOp(node, SimdType::kInt32x4, machine()->RoundInt32ToFloat32());
break;
}
case IrOpcode::kF32x4UConvertI32x4: {
LowerUnaryOp(node, SimdType::kInt32x4, machine()->RoundUint32ToFloat32());
break;
}
case IrOpcode::kF64x2Abs: {
LowerUnaryOp(node, rep_type, machine()->Float64Abs());
break;
}
case IrOpcode::kF64x2Neg: {
LowerUnaryOp(node, rep_type, machine()->Float64Neg());
break;
}
case IrOpcode::kF64x2Sqrt: {
LowerUnaryOp(node, rep_type, machine()->Float64Sqrt());
break;
}
case IrOpcode::kF64x2Add: {
LowerBinaryOp(node, rep_type, machine()->Float64Add());
break;
}
case IrOpcode::kF64x2Sub: {
LowerBinaryOp(node, rep_type, machine()->Float64Sub());
break;
}
case IrOpcode::kF64x2Mul: {
LowerBinaryOp(node, rep_type, machine()->Float64Mul());
break;
}
case IrOpcode::kF64x2Div: {
LowerBinaryOp(node, rep_type, machine()->Float64Div());
break;
}
case IrOpcode::kF64x2Min: {
LowerBinaryOp(node, rep_type, machine()->Float64Min());
break;
}
case IrOpcode::kF64x2Max: {
LowerBinaryOp(node, rep_type, machine()->Float64Max());
break;
}
case IrOpcode::kF64x2Pmin: {
LowerFloatPseudoMinMax(node, machine()->Float64LessThan(), false,
rep_type);
break;
}
case IrOpcode::kF64x2Pmax: {
LowerFloatPseudoMinMax(node, machine()->Float64LessThan(), true,
rep_type);
break;
}
case IrOpcode::kF64x2Ceil: {
LowerUnaryOp(node, rep_type, machine()->Float64RoundUp().op());
break;
}
case IrOpcode::kF64x2Floor: {
LowerUnaryOp(node, rep_type, machine()->Float64RoundDown().op());
break;
}
case IrOpcode::kF64x2Trunc: {
LowerUnaryOp(node, rep_type, machine()->Float64RoundTruncate().op());
break;
}
case IrOpcode::kF64x2NearestInt: {
LowerUnaryOp(node, rep_type, machine()->Float64RoundTiesEven().op());
break;
}
case IrOpcode::kF64x2Splat:
case IrOpcode::kF32x4Splat:
case IrOpcode::kI64x2Splat:
case IrOpcode::kI32x4Splat:
case IrOpcode::kI16x8Splat:
case IrOpcode::kI8x16Splat: {
Node** rep_node = zone()->NewArray<Node*>(num_lanes);
Node* val = (HasReplacement(0, node->InputAt(0)))
? GetReplacements(node->InputAt(0))[0]
: node->InputAt(0);
// I16 and I8 are placed in Word32 nodes, we need to mask them
// accordingly, to account for overflows, then sign extend them.
if (node->opcode() == IrOpcode::kI16x8Splat) {
val = graph()->NewNode(machine()->SignExtendWord16ToInt32(),
Mask(val, kMask16));
} else if (node->opcode() == IrOpcode::kI8x16Splat) {
val = graph()->NewNode(machine()->SignExtendWord8ToInt32(),
Mask(val, kMask8));
}
for (int i = 0; i < num_lanes; ++i) {
rep_node[i] = val;
}
ReplaceNode(node, rep_node, num_lanes);
break;
}
case IrOpcode::kF64x2ExtractLane:
case IrOpcode::kF32x4ExtractLane:
case IrOpcode::kI64x2ExtractLane:
case IrOpcode::kI32x4ExtractLane:
case IrOpcode::kI16x8ExtractLaneU:
case IrOpcode::kI16x8ExtractLaneS:
case IrOpcode::kI8x16ExtractLaneU:
case IrOpcode::kI8x16ExtractLaneS: {
int32_t lane = OpParameter<int32_t>(node->op());
Node** rep_node = zone()->NewArray<Node*>(1);
rep_node[0] = GetReplacementsWithType(node->InputAt(0), rep_type)[lane];
// If unsigned, mask the top bits.
if (node->opcode() == IrOpcode::kI16x8ExtractLaneU) {
rep_node[0] = Mask(rep_node[0], kMask16);
} else if (node->opcode() == IrOpcode::kI8x16ExtractLaneU) {
rep_node[0] = Mask(rep_node[0], kMask8);
}
ReplaceNode(node, rep_node, 1);
break;
}
case IrOpcode::kF64x2ReplaceLane:
case IrOpcode::kF32x4ReplaceLane:
case IrOpcode::kI64x2ReplaceLane:
case IrOpcode::kI32x4ReplaceLane:
case IrOpcode::kI16x8ReplaceLane:
case IrOpcode::kI8x16ReplaceLane: {
DCHECK_EQ(2, node->InputCount());
Node* repNode = node->InputAt(1);
int32_t lane = OpParameter<int32_t>(node->op());
Node** old_rep_node = GetReplacementsWithType(node->InputAt(0), rep_type);
Node** rep_node = zone()->NewArray<Node*>(num_lanes);
for (int i = 0; i < num_lanes; ++i) {
rep_node[i] = old_rep_node[i];
}
if (HasReplacement(0, repNode)) {
rep_node[lane] = GetReplacements(repNode)[0];
} else {
rep_node[lane] = repNode;
}
// The replacement nodes for these opcodes are in Word32, and we always
// store nodes in sign extended form (and mask to account for overflows.)
if (node->opcode() == IrOpcode::kI16x8ReplaceLane) {
rep_node[lane] = graph()->NewNode(machine()->SignExtendWord16ToInt32(),
Mask(rep_node[lane], kMask16));
} else if (node->opcode() == IrOpcode::kI8x16ReplaceLane) {
rep_node[lane] = graph()->NewNode(machine()->SignExtendWord8ToInt32(),
Mask(rep_node[lane], kMask8));
}
ReplaceNode(node, rep_node, num_lanes);
break;
}
#define COMPARISON_CASE(type, simd_op, lowering_op, invert) \
case IrOpcode::simd_op: { \
LowerCompareOp(node, SimdType::k##type, machine()->lowering_op(), invert); \
break; \
}
COMPARISON_CASE(Float64x2, kF64x2Eq, Float64Equal, false)
COMPARISON_CASE(Float64x2, kF64x2Lt, Float64LessThan, false)
COMPARISON_CASE(Float64x2, kF64x2Le, Float64LessThanOrEqual, false)
COMPARISON_CASE(Float32x4, kF32x4Eq, Float32Equal, false)
COMPARISON_CASE(Float32x4, kF32x4Lt, Float32LessThan, false)
COMPARISON_CASE(Float32x4, kF32x4Le, Float32LessThanOrEqual, false)
COMPARISON_CASE(Float32x4, kF32x4Gt, Float32LessThan, true)
COMPARISON_CASE(Float32x4, kF32x4Ge, Float32LessThanOrEqual, true)
COMPARISON_CASE(Int32x4, kI32x4Eq, Word32Equal, false)
COMPARISON_CASE(Int32x4, kI32x4LtS, Int32LessThan, false)
COMPARISON_CASE(Int32x4, kI32x4LeS, Int32LessThanOrEqual, false)
COMPARISON_CASE(Int32x4, kI32x4GtS, Int32LessThan, true)
COMPARISON_CASE(Int32x4, kI32x4GeS, Int32LessThanOrEqual, true)
COMPARISON_CASE(Int32x4, kI32x4LtU, Uint32LessThan, false)
COMPARISON_CASE(Int32x4, kI32x4LeU, Uint32LessThanOrEqual, false)
COMPARISON_CASE(Int32x4, kI32x4GtU, Uint32LessThan, true)
COMPARISON_CASE(Int32x4, kI32x4GeU, Uint32LessThanOrEqual, true)
COMPARISON_CASE(Int16x8, kI16x8Eq, Word32Equal, false)
COMPARISON_CASE(Int16x8, kI16x8LtS, Int32LessThan, false)
COMPARISON_CASE(Int16x8, kI16x8LeS, Int32LessThanOrEqual, false)
COMPARISON_CASE(Int16x8, kI16x8GtS, Int32LessThan, true)
COMPARISON_CASE(Int16x8, kI16x8GeS, Int32LessThanOrEqual, true)
COMPARISON_CASE(Int16x8, kI16x8LtU, Uint32LessThan, false)
COMPARISON_CASE(Int16x8, kI16x8LeU, Uint32LessThanOrEqual, false)
COMPARISON_CASE(Int16x8, kI16x8GtU, Uint32LessThan, true)
COMPARISON_CASE(Int16x8, kI16x8GeU, Uint32LessThanOrEqual, true)
COMPARISON_CASE(Int8x16, kI8x16Eq, Word32Equal, false)
COMPARISON_CASE(Int8x16, kI8x16LtS, Int32LessThan, false)
COMPARISON_CASE(Int8x16, kI8x16LeS, Int32LessThanOrEqual, false)
COMPARISON_CASE(Int8x16, kI8x16GtS, Int32LessThan, true)
COMPARISON_CASE(Int8x16, kI8x16GeS, Int32LessThanOrEqual, true)
COMPARISON_CASE(Int8x16, kI8x16LtU, Uint32LessThan, false)
COMPARISON_CASE(Int8x16, kI8x16LeU, Uint32LessThanOrEqual, false)
COMPARISON_CASE(Int8x16, kI8x16GtU, Uint32LessThan, true)
COMPARISON_CASE(Int8x16, kI8x16GeU, Uint32LessThanOrEqual, true)
#undef COMPARISON_CASE
case IrOpcode::kF64x2Ne: {
LowerNotEqual(node, SimdType::kFloat64x2, machine()->Float64Equal());
break;
}
case IrOpcode::kF32x4Ne: {
LowerNotEqual(node, SimdType::kFloat32x4, machine()->Float32Equal());
break;
}
case IrOpcode::kI32x4Ne: {
LowerNotEqual(node, SimdType::kInt32x4, machine()->Word32Equal());
break;
}
case IrOpcode::kI16x8Ne: {
LowerNotEqual(node, SimdType::kInt16x8, machine()->Word32Equal());
break;
}
case IrOpcode::kI8x16Ne: {
LowerNotEqual(node, SimdType::kInt8x16, machine()->Word32Equal());
break;
}
case IrOpcode::kS128Select: {
DCHECK_EQ(3, node->InputCount());
DCHECK(ReplacementType(node->InputAt(0)) == SimdType::kInt32x4 ||
ReplacementType(node->InputAt(0)) == SimdType::kInt16x8 ||
ReplacementType(node->InputAt(0)) == SimdType::kInt8x16);
Node** boolean_input =
GetReplacementsWithType(node->InputAt(0), rep_type);
Node** rep_left = GetReplacementsWithType(node->InputAt(1), rep_type);
Node** rep_right = GetReplacementsWithType(node->InputAt(2), rep_type);
Node** rep_node = zone()->NewArray<Node*>(num_lanes);
for (int i = 0; i < num_lanes; ++i) {
Node* tmp1 =
graph()->NewNode(machine()->Word32Xor(), rep_left[i], rep_right[i]);
Node* tmp2 =
graph()->NewNode(machine()->Word32And(), boolean_input[i], tmp1);
rep_node[i] =
graph()->NewNode(machine()->Word32Xor(), rep_right[i], tmp2);
}
ReplaceNode(node, rep_node, num_lanes);
break;
}
case IrOpcode::kI8x16Swizzle: {
DCHECK_EQ(2, node->InputCount());
Node** rep_left = GetReplacementsWithType(node->InputAt(0), rep_type);
Node** indices = GetReplacementsWithType(node->InputAt(1), rep_type);
Node** rep_nodes = zone()->NewArray<Node*>(num_lanes);
Node* stack_slot = graph()->NewNode(
machine()->StackSlot(MachineRepresentation::kSimd128));
// Push all num_lanes values into stack slot.
const Operator* store_op = machine()->Store(
StoreRepresentation(MachineRepresentation::kWord8, kNoWriteBarrier));
Node* effect_input = graph()->start();
for (int i = num_lanes - 1; i >= 0; i--) {
// We want all the stores to happen first before any of the loads
// below, so connect them via effect edge from i-1 to i.
Node* store =
graph()->NewNode(store_op, stack_slot, mcgraph_->Int32Constant(i),
rep_left[i], effect_input, graph()->start());
effect_input = store;
}
for (int i = num_lanes - 1; i >= 0; i--) {
// Only select lane when index is < num_lanes, otherwise write 0 to
// lane. Use Uint32 to take care of negative indices.
Diamond d(graph(), common(),
graph()->NewNode(machine()->Uint32LessThan(), indices[i],
mcgraph_->Int32Constant(num_lanes)));
Node* load =
graph()->NewNode(machine()->Load(LoadRepresentation::Uint8()),
stack_slot, indices[i], effect_input, d.if_true);
rep_nodes[i] = d.Phi(MachineRepresentation::kWord8, load,
mcgraph_->Int32Constant(0));
}
ReplaceNode(node, rep_nodes, num_lanes);
break;
}
case IrOpcode::kI8x16Shuffle: {
DCHECK_EQ(2, node->InputCount());
S128ImmediateParameter shuffle = S128ImmediateParameterOf(node->op());
Node** rep_left = GetReplacementsWithType(node->InputAt(0), rep_type);
Node** rep_right = GetReplacementsWithType(node->InputAt(1), rep_type);
Node** rep_node = zone()->NewArray<Node*>(16);
for (int i = 0; i < 16; i++) {
int lane = shuffle[i];
rep_node[i] = lane < 16 ? rep_left[lane] : rep_right[lane - 16];
}
ReplaceNode(node, rep_node, 16);
break;
}
case IrOpcode::kV32x4AnyTrue:
case IrOpcode::kV16x8AnyTrue:
case IrOpcode::kV8x16AnyTrue: {
DCHECK_EQ(1, node->InputCount());
// AnyTrue always returns a I32x4, and can work with inputs of any shape,
// but we still need GetReplacementsWithType if input is float.
DCHECK_EQ(ReplacementType(node), SimdType::kInt32x4);
Node** reps = GetReplacementsWithType(node->InputAt(0), rep_type);
Node** rep_node = zone()->NewArray<Node*>(1);
Node* true_node = mcgraph_->Int32Constant(1);
Node* zero = mcgraph_->Int32Constant(0);
Node* tmp_result = zero;
for (int i = 0; i < num_lanes; ++i) {
Diamond d(graph(), common(),
graph()->NewNode(machine()->Word32Equal(), reps[i], zero));
tmp_result =
d.Phi(MachineRepresentation::kWord32, tmp_result, true_node);
}
rep_node[0] = tmp_result;
ReplaceNode(node, rep_node, 1);
break;
}
case IrOpcode::kV32x4AllTrue: {
LowerAllTrueOp(node, SimdType::kInt32x4);
break;
}
case IrOpcode::kV16x8AllTrue: {
LowerAllTrueOp(node, SimdType::kInt16x8);
break;
}
case IrOpcode::kV8x16AllTrue: {
LowerAllTrueOp(node, SimdType::kInt8x16);
break;
}
case IrOpcode::kI8x16BitMask: {
LowerBitMaskOp(node, rep_type, 7);
break;
}
case IrOpcode::kI16x8BitMask: {
LowerBitMaskOp(node, rep_type, 15);
break;
}
case IrOpcode::kI32x4BitMask: {
LowerBitMaskOp(node, rep_type, 31);
break;
}
case IrOpcode::kI8x16RoundingAverageU:
case IrOpcode::kI16x8RoundingAverageU: {
DCHECK_EQ(2, node->InputCount());
Node** rep_left = GetReplacementsWithType(node->InputAt(0), rep_type);
Node** rep_right = GetReplacementsWithType(node->InputAt(1), rep_type);
int num_lanes = NumLanes(rep_type);
Node** rep_node = zone()->NewArray<Node*>(num_lanes);
// Nodes are stored signed, so mask away the top bits.
// rounding_average(left, right) = (left + right + 1) >> 1
const int bit_mask = num_lanes == 16 ? kMask8 : kMask16;
for (int i = 0; i < num_lanes; ++i) {
Node* mask_left = graph()->NewNode(machine()->Word32And(), rep_left[i],
mcgraph_->Int32Constant(bit_mask));
Node* mask_right =
graph()->NewNode(machine()->Word32And(), rep_right[i],
mcgraph_->Int32Constant(bit_mask));
Node* left_plus_right_plus_one = graph()->NewNode(
machine()->Int32Add(),
graph()->NewNode(machine()->Int32Add(), mask_left, mask_right),
mcgraph_->Int32Constant(1));
rep_node[i] =
graph()->NewNode(machine()->Word32Shr(), left_plus_right_plus_one,
mcgraph_->Int32Constant(1));
}
ReplaceNode(node, rep_node, num_lanes);
break;
}
default: {
DefaultLowering(node);
}
}
}
bool SimdScalarLowering::DefaultLowering(Node* node) {
bool something_changed = false;
for (int i = NodeProperties::PastValueIndex(node) - 1; i >= 0; i--) {
Node* input = node->InputAt(i);
if (HasReplacement(0, input)) {
something_changed = true;
node->ReplaceInput(i, GetReplacements(input)[0]);
}
if (ReplacementCount(input) > 1 && HasReplacement(1, input)) {
something_changed = true;
for (int j = 1; j < ReplacementCount(input); ++j) {
node->InsertInput(zone(), i + j, GetReplacements(input)[j]);
}
}
}
return something_changed;
}
void SimdScalarLowering::ReplaceNode(Node* old, Node** new_nodes, int count) {
replacements_[old->id()].node = zone()->NewArray<Node*>(count);
for (int i = 0; i < count; ++i) {
replacements_[old->id()].node[i] = new_nodes[i];
}
replacements_[old->id()].num_replacements = count;
}
bool SimdScalarLowering::HasReplacement(size_t index, Node* node) {
return replacements_[node->id()].node != nullptr &&
replacements_[node->id()].node[index] != nullptr;
}
SimdScalarLowering::SimdType SimdScalarLowering::ReplacementType(Node* node) {
return replacements_[node->id()].type;
}
Node** SimdScalarLowering::GetReplacements(Node* node) {
Node** result = replacements_[node->id()].node;
DCHECK(result);
return result;
}
int SimdScalarLowering::ReplacementCount(Node* node) {
return replacements_[node->id()].num_replacements;
}
void SimdScalarLowering::Int32ToFloat32(Node** replacements, Node** result) {
for (int i = 0; i < kNumLanes32; ++i) {
if (replacements[i] != nullptr) {
result[i] =
graph()->NewNode(machine()->BitcastInt32ToFloat32(), replacements[i]);
} else {
result[i] = nullptr;
}
}
}
void SimdScalarLowering::Int64ToFloat64(Node** replacements, Node** result) {
for (int i = 0; i < kNumLanes64; ++i) {
if (replacements[i] != nullptr) {
result[i] =
graph()->NewNode(machine()->BitcastInt64ToFloat64(), replacements[i]);
} else {
result[i] = nullptr;
}
}
}
void SimdScalarLowering::Float64ToInt64(Node** replacements, Node** result) {
for (int i = 0; i < kNumLanes64; ++i) {
if (replacements[i] != nullptr) {
result[i] =
graph()->NewNode(machine()->BitcastFloat64ToInt64(), replacements[i]);
} else {
result[i] = nullptr;
}
}
}
void SimdScalarLowering::Float32ToInt32(Node** replacements, Node** result) {
for (int i = 0; i < kNumLanes32; ++i) {
if (replacements[i] != nullptr) {
result[i] =
graph()->NewNode(machine()->BitcastFloat32ToInt32(), replacements[i]);
} else {
result[i] = nullptr;
}
}
}
void SimdScalarLowering::Int64ToInt32(Node** replacements, Node** result) {
const int num_ints = sizeof(int64_t) / sizeof(int32_t);
const int bit_size = sizeof(int32_t) * 8;
const Operator* truncate = machine()->TruncateInt64ToInt32();
for (int i = 0; i < kNumLanes64; i++) {
if (replacements[i] != nullptr) {
for (int j = 0; j < num_ints; j++) {
result[num_ints * i + j] = graph()->NewNode(
truncate, graph()->NewNode(machine()->Word64Sar(), replacements[i],
mcgraph_->Int32Constant(j * bit_size)));
}
} else {
for (int j = 0; j < num_ints; j++) {
result[num_ints * i + j] = nullptr;
}
}
}
}
template <typename T>
void SimdScalarLowering::Int32ToSmallerInt(Node** replacements, Node** result) {
const int num_ints = sizeof(int32_t) / sizeof(T);
const int bit_size = sizeof(T) * 8;
const Operator* sign_extend;
switch (sizeof(T)) {
case 1:
sign_extend = machine()->SignExtendWord8ToInt32();
break;
case 2:
sign_extend = machine()->SignExtendWord16ToInt32();
break;
default:
UNREACHABLE();
}
for (int i = 0; i < kNumLanes32; i++) {
if (replacements[i] != nullptr) {
for (int j = 0; j < num_ints; j++) {
result[num_ints * i + j] = graph()->NewNode(
sign_extend,
graph()->NewNode(machine()->Word32Shr(), replacements[i],
mcgraph_->Int32Constant(j * bit_size)));
}
} else {
for (int j = 0; j < num_ints; j++) {
result[num_ints * i + j] = nullptr;
}
}
}
}
template <typename T>
void SimdScalarLowering::SmallerIntToInt32(Node** replacements, Node** result) {
const int num_ints = sizeof(int32_t) / sizeof(T);
const int bit_size = sizeof(T) * 8;
const int bit_mask = (1 << bit_size) - 1;
for (int i = 0; i < kNumLanes32; ++i) {
result[i] = mcgraph_->Int32Constant(0);
for (int j = 0; j < num_ints; j++) {
if (replacements[num_ints * i + j] != nullptr) {
Node* clean_bits = graph()->NewNode(machine()->Word32And(),
replacements[num_ints * i + j],
mcgraph_->Int32Constant(bit_mask));
Node* shift = graph()->NewNode(machine()->Word32Shl(), clean_bits,
mcgraph_->Int32Constant(j * bit_size));
result[i] = graph()->NewNode(machine()->Word32Or(), result[i], shift);
}
}
}
}
void SimdScalarLowering::Int32ToInt64(Node** replacements, Node** result) {
const int num_ints = sizeof(int64_t) / sizeof(int32_t);
for (int i = 0; i < kNumLanes64; i++) {
Node* i64 = graph()->NewNode(machine()->ChangeUint32ToUint64(),
replacements[num_ints * i + 1]);
Node* high = graph()->NewNode(machine()->Word64Shl(), i64,
mcgraph_->Int32Constant(32));
Node* i64_low = graph()->NewNode(machine()->ChangeUint32ToUint64(),
replacements[num_ints * i]);
result[i] = graph()->NewNode(machine()->Word64Or(), high, i64_low);
}
}
Node** SimdScalarLowering::GetReplacementsWithType(Node* node, SimdType type) {
// Operations like extract lane, bitmask, any_true, all_true replaces a SIMD
// node with a scalar. Those won't be correctly handled here. They should be
// special cased and replaced with the appropriate scalar.
DCHECK_LT(1, ReplacementCount(node));
Node** replacements = GetReplacements(node);
if (type == ReplacementType(node)) {
return replacements;
}
int num_lanes = NumLanes(type);
Node** result = zone()->NewArray<Node*>(num_lanes);
switch (type) {
case SimdType::kInt64x2: {
switch (ReplacementType(node)) {
case SimdType::kInt64x2: {
UNREACHABLE();
}
case SimdType::kInt32x4: {
Int32ToInt64(replacements, result);
break;
}
case SimdType::kInt16x8: {
Node** to_int32 = zone()->NewArray<Node*>(kNumLanes32);
SmallerIntToInt32<int16_t>(replacements, to_int32);
Int32ToInt64(to_int32, result);
break;
}
case SimdType::kInt8x16: {
Node** to_int32 = zone()->NewArray<Node*>(kNumLanes32);
SmallerIntToInt32<int8_t>(replacements, to_int32);
Int32ToInt64(to_int32, result);
break;
}
case SimdType::kFloat64x2: {
Float64ToInt64(replacements, result);
break;
}
case SimdType::kFloat32x4: {
Node** to_int32 = zone()->NewArray<Node*>(kNumLanes32);
Float32ToInt32(replacements, to_int32);
Int32ToInt64(to_int32, result);
break;
}
}
break;
}
case SimdType::kInt32x4: {
switch (ReplacementType(node)) {
case SimdType::kInt64x2: {
Int64ToInt32(replacements, result);
break;
}
case SimdType::kInt32x4: {
UNREACHABLE();
}
case SimdType::kInt16x8: {
SmallerIntToInt32<int16_t>(replacements, result);
break;
}
case SimdType::kInt8x16: {
SmallerIntToInt32<int8_t>(replacements, result);
break;
}
case SimdType::kFloat64x2: {
Node** float64_to_int64 = zone()->NewArray<Node*>(kNumLanes64);
Float64ToInt64(replacements, float64_to_int64);
Int64ToInt32(float64_to_int64, result);
break;
}
case SimdType::kFloat32x4: {
Float32ToInt32(replacements, result);
break;
}
}
break;
}
case SimdType::kInt16x8: {
switch (ReplacementType(node)) {
case SimdType::kInt64x2: {
Node** to_int32 = zone()->NewArray<Node*>(kNumLanes32);
Int64ToInt32(replacements, to_int32);
Int32ToSmallerInt<int16_t>(to_int32, result);
break;
}
case SimdType::kInt32x4: {
Int32ToSmallerInt<int16_t>(replacements, result);
break;
}
case SimdType::kInt16x8: {
UNREACHABLE();
}
case SimdType::kInt8x16: {
Node** to_int32 = zone()->NewArray<Node*>(kNumLanes32);
SmallerIntToInt32<int8_t>(replacements, to_int32);
Int32ToSmallerInt<int16_t>(to_int32, result);
break;
}
case SimdType::kFloat64x2: {
Node** to_int64 = zone()->NewArray<Node*>(kNumLanes64);
Node** to_int32 = zone()->NewArray<Node*>(kNumLanes32);
Float64ToInt64(replacements, to_int64);
Int64ToInt32(to_int64, to_int32);
Int32ToSmallerInt<int16_t>(to_int32, result);
break;
}
case SimdType::kFloat32x4: {
Node** float32_to_int32 = zone()->NewArray<Node*>(kNumLanes32);
Float32ToInt32(replacements, float32_to_int32);
Int32ToSmallerInt<int16_t>(float32_to_int32, result);
break;
}
}
break;
}
case SimdType::kInt8x16: {
switch (ReplacementType(node)) {
case SimdType::kInt64x2: {
Node** int64_to_int32 = zone()->NewArray<Node*>(kNumLanes32);
Int64ToInt32(replacements, int64_to_int32);
Int32ToSmallerInt<int8_t>(int64_to_int32, result);
break;
}
case SimdType::kInt32x4: {
Int32ToSmallerInt<int8_t>(replacements, result);
break;
}
case SimdType::kInt16x8: {
Node** int16_to_int32 = zone()->NewArray<Node*>(kNumLanes32);
SmallerIntToInt32<int16_t>(replacements, int16_to_int32);
Int32ToSmallerInt<int8_t>(int16_to_int32, result);
break;
}
case SimdType::kInt8x16: {
UNREACHABLE();
}
case SimdType::kFloat64x2: {
Node** to_int64 = zone()->NewArray<Node*>(kNumLanes64);
Node** to_int32 = zone()->NewArray<Node*>(kNumLanes32);
Float64ToInt64(replacements, to_int64);
Int64ToInt32(to_int64, to_int32);
Int32ToSmallerInt<int8_t>(to_int32, result);
break;
}
case SimdType::kFloat32x4: {
Node** float32_to_int32 = zone()->NewArray<Node*>(kNumLanes32);
Float32ToInt32(replacements, float32_to_int32);
Int32ToSmallerInt<int8_t>(float32_to_int32, result);
break;
}
}
break;
}
case SimdType::kFloat64x2: {
switch (ReplacementType(node)) {
case SimdType::kInt64x2: {
Int64ToFloat64(replacements, result);
break;
}
case SimdType::kInt32x4: {
Node** int32_to_int64 = zone()->NewArray<Node*>(kNumLanes64);
Int32ToInt64(replacements, int32_to_int64);
Int64ToFloat64(int32_to_int64, result);
break;
}
case SimdType::kInt16x8: {
Node** to_int32 = zone()->NewArray<Node*>(kNumLanes32);
Node** to_int64 = zone()->NewArray<Node*>(kNumLanes64);
SmallerIntToInt32<int16_t>(replacements, to_int32);
Int32ToInt64(to_int32, to_int64);
Int64ToFloat64(to_int64, result);
break;
}
case SimdType::kInt8x16: {
Node** to_int32 = zone()->NewArray<Node*>(kNumLanes32);
Node** to_int64 = zone()->NewArray<Node*>(kNumLanes64);
SmallerIntToInt32<int8_t>(replacements, to_int32);
Int32ToInt64(to_int32, to_int64);
Int64ToFloat64(to_int64, result);
break;
}
case SimdType::kFloat64x2: {
UNREACHABLE();
}
case SimdType::kFloat32x4: {
Node** to_int32 = zone()->NewArray<Node*>(kNumLanes32);
Node** to_int64 = zone()->NewArray<Node*>(kNumLanes64);
Float32ToInt32(replacements, to_int32);
Int32ToInt64(to_int32, to_int64);
Int64ToFloat64(to_int64, result);
break;
}
}
break;
}
case SimdType::kFloat32x4: {
switch (ReplacementType(node)) {
case SimdType::kInt64x2: {
Node** to_int32 = zone()->NewArray<Node*>(kNumLanes32);
Int64ToInt32(replacements, to_int32);
Int32ToFloat32(to_int32, result);
break;
}
case SimdType::kInt32x4: {
Int32ToFloat32(replacements, result);
break;
}
case SimdType::kInt16x8: {
Node** to_int32 = zone()->NewArray<Node*>(kNumLanes32);
SmallerIntToInt32<int16_t>(replacements, to_int32);
Int32ToFloat32(to_int32, result);
break;
}
case SimdType::kInt8x16: {
SmallerIntToInt32<int8_t>(replacements, result);
Int32ToFloat32(result, result);
break;
}
case SimdType::kFloat64x2: {
Node** float64_to_int64 = zone()->NewArray<Node*>(kNumLanes64);
Node** int64_to_int32 = zone()->NewArray<Node*>(kNumLanes32);
Float64ToInt64(replacements, float64_to_int64);
Int64ToInt32(float64_to_int64, int64_to_int32);
Int32ToFloat32(int64_to_int32, result);
break;
}
case SimdType::kFloat32x4: {
UNREACHABLE();
}
}
break;
}
}
return result;
}
void SimdScalarLowering::PreparePhiReplacement(Node* phi) {
MachineRepresentation rep = PhiRepresentationOf(phi->op());
if (rep == MachineRepresentation::kSimd128) {
// We have to create the replacements for a phi node before we actually
// lower the phi to break potential cycles in the graph. The replacements of
// input nodes do not exist yet, so we use a placeholder node to pass the
// graph verifier.
int value_count = phi->op()->ValueInputCount();
SimdType type = ReplacementType(phi);
int num_lanes = NumLanes(type);
Node*** inputs_rep = zone()->NewArray<Node**>(num_lanes);
for (int i = 0; i < num_lanes; ++i) {
inputs_rep[i] = zone()->NewArray<Node*>(value_count + 1);
inputs_rep[i][value_count] = NodeProperties::GetControlInput(phi, 0);
}
for (int i = 0; i < value_count; ++i) {
for (int j = 0; j < num_lanes; ++j) {
inputs_rep[j][i] = placeholder_;
}
}
Node** rep_nodes = zone()->NewArray<Node*>(num_lanes);
for (int i = 0; i < num_lanes; ++i) {
rep_nodes[i] = graph()->NewNode(
common()->Phi(MachineTypeFrom(type).representation(), value_count),
value_count + 1, inputs_rep[i], false);
}
ReplaceNode(phi, rep_nodes, num_lanes);
}
}
} // namespace compiler
} // namespace internal
} // namespace v8