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//===- NVVMToLLVMIRTranslation.cpp - Translate NVVM to LLVM IR ------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file implements a translation between the MLIR NVVM dialect and
// LLVM IR.
//
//===----------------------------------------------------------------------===//
#include "mlir/Target/LLVMIR/Dialect/NVVM/NVVMToLLVMIRTranslation.h"
#include "mlir/Dialect/LLVMIR/NVVMDialect.h"
#include "mlir/Dialect/Utils/StaticValueUtils.h"
#include "mlir/IR/Operation.h"
#include "mlir/Support/LogicalResult.h"
#include "mlir/Target/LLVMIR/ModuleTranslation.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/IntrinsicsNVPTX.h"
using namespace mlir;
using namespace mlir::LLVM;
using mlir::LLVM::detail::createIntrinsicCall;
static llvm::Intrinsic::ID getReduxIntrinsicId(llvm::Type *resultType,
NVVM::ReduxKind kind) {
if (!resultType->isIntegerTy(32))
llvm_unreachable("unsupported data type for redux");
switch (kind) {
case NVVM::ReduxKind::ADD:
return llvm::Intrinsic::nvvm_redux_sync_add;
case NVVM::ReduxKind::UMAX:
return llvm::Intrinsic::nvvm_redux_sync_umax;
case NVVM::ReduxKind::UMIN:
return llvm::Intrinsic::nvvm_redux_sync_umin;
case NVVM::ReduxKind::AND:
return llvm::Intrinsic::nvvm_redux_sync_and;
case NVVM::ReduxKind::OR:
return llvm::Intrinsic::nvvm_redux_sync_or;
case NVVM::ReduxKind::XOR:
return llvm::Intrinsic::nvvm_redux_sync_xor;
case NVVM::ReduxKind::MAX:
return llvm::Intrinsic::nvvm_redux_sync_max;
case NVVM::ReduxKind::MIN:
return llvm::Intrinsic::nvvm_redux_sync_min;
}
llvm_unreachable("unknown redux kind");
}
static llvm::Intrinsic::ID getShflIntrinsicId(llvm::Type *resultType,
NVVM::ShflKind kind,
bool withPredicate) {
if (withPredicate) {
resultType = cast<llvm::StructType>(resultType)->getElementType(0);
switch (kind) {
case NVVM::ShflKind::bfly:
return resultType->isFloatTy()
? llvm::Intrinsic::nvvm_shfl_sync_bfly_f32p
: llvm::Intrinsic::nvvm_shfl_sync_bfly_i32p;
case NVVM::ShflKind::up:
return resultType->isFloatTy() ? llvm::Intrinsic::nvvm_shfl_sync_up_f32p
: llvm::Intrinsic::nvvm_shfl_sync_up_i32p;
case NVVM::ShflKind::down:
return resultType->isFloatTy()
? llvm::Intrinsic::nvvm_shfl_sync_down_f32p
: llvm::Intrinsic::nvvm_shfl_sync_down_i32p;
case NVVM::ShflKind::idx:
return resultType->isFloatTy() ? llvm::Intrinsic::nvvm_shfl_sync_idx_f32p
: llvm::Intrinsic::nvvm_shfl_sync_idx_i32p;
}
} else {
switch (kind) {
case NVVM::ShflKind::bfly:
return resultType->isFloatTy() ? llvm::Intrinsic::nvvm_shfl_sync_bfly_f32
: llvm::Intrinsic::nvvm_shfl_sync_bfly_i32;
case NVVM::ShflKind::up:
return resultType->isFloatTy() ? llvm::Intrinsic::nvvm_shfl_sync_up_f32
: llvm::Intrinsic::nvvm_shfl_sync_up_i32;
case NVVM::ShflKind::down:
return resultType->isFloatTy() ? llvm::Intrinsic::nvvm_shfl_sync_down_f32
: llvm::Intrinsic::nvvm_shfl_sync_down_i32;
case NVVM::ShflKind::idx:
return resultType->isFloatTy() ? llvm::Intrinsic::nvvm_shfl_sync_idx_f32
: llvm::Intrinsic::nvvm_shfl_sync_idx_i32;
}
}
llvm_unreachable("unknown shuffle kind");
}
/// Return the intrinsic ID associated with ldmatrix for the given paramters.
static llvm::Intrinsic::ID getLdMatrixIntrinsicId(NVVM::MMALayout layout,
int32_t num) {
if (layout == NVVM::MMALayout::row) {
switch (num) {
case 1:
return llvm::Intrinsic::nvvm_ldmatrix_sync_aligned_m8n8_x1_b16;
case 2:
return llvm::Intrinsic::nvvm_ldmatrix_sync_aligned_m8n8_x2_b16;
case 4:
return llvm::Intrinsic::nvvm_ldmatrix_sync_aligned_m8n8_x4_b16;
default:
llvm_unreachable("unsupported number of matrix");
}
} else {
switch (num) {
case 1:
return llvm::Intrinsic::nvvm_ldmatrix_sync_aligned_m8n8_x1_trans_b16;
case 2:
return llvm::Intrinsic::nvvm_ldmatrix_sync_aligned_m8n8_x2_trans_b16;
case 4:
return llvm::Intrinsic::nvvm_ldmatrix_sync_aligned_m8n8_x4_trans_b16;
default:
llvm_unreachable("unsupported number of matrix");
}
}
}
namespace {
/// Implementation of the dialect interface that converts operations belonging
/// to the NVVM dialect to LLVM IR.
class NVVMDialectLLVMIRTranslationInterface
: public LLVMTranslationDialectInterface {
public:
using LLVMTranslationDialectInterface::LLVMTranslationDialectInterface;
/// Translates the given operation to LLVM IR using the provided IR builder
/// and saving the state in `moduleTranslation`.
LogicalResult
convertOperation(Operation *op, llvm::IRBuilderBase &builder,
LLVM::ModuleTranslation &moduleTranslation) const final {
Operation &opInst = *op;
#include "mlir/Dialect/LLVMIR/NVVMConversions.inc"
return failure();
}
/// Attaches module-level metadata for functions marked as kernels.
LogicalResult
amendOperation(Operation *op, NamedAttribute attribute,
LLVM::ModuleTranslation &moduleTranslation) const final {
auto func = dyn_cast<LLVM::LLVMFuncOp>(op);
if (!func)
return failure();
llvm::LLVMContext &llvmContext = moduleTranslation.getLLVMContext();
llvm::Function *llvmFunc = moduleTranslation.lookupFunction(func.getName());
auto generateMetadata = [&](int dim, StringRef name) {
llvm::Metadata *llvmMetadata[] = {
llvm::ValueAsMetadata::get(llvmFunc),
llvm::MDString::get(llvmContext, name),
llvm::ValueAsMetadata::get(llvm::ConstantInt::get(
llvm::Type::getInt32Ty(llvmContext), dim))};
llvm::MDNode *llvmMetadataNode =
llvm::MDNode::get(llvmContext, llvmMetadata);
moduleTranslation.getOrInsertNamedModuleMetadata("nvvm.annotations")
->addOperand(llvmMetadataNode);
};
if (attribute.getName() == NVVM::NVVMDialect::getMaxntidAttrName()) {
if (!dyn_cast<ArrayAttr>(attribute.getValue()))
return failure();
SmallVector<int64_t> values =
extractFromIntegerArrayAttr<int64_t>(attribute.getValue());
generateMetadata(values[0], NVVM::NVVMDialect::getMaxntidXName());
if (values.size() > 1)
generateMetadata(values[1], NVVM::NVVMDialect::getMaxntidYName());
if (values.size() > 2)
generateMetadata(values[2], NVVM::NVVMDialect::getMaxntidZName());
} else if (attribute.getName() == NVVM::NVVMDialect::getReqntidAttrName()) {
if (!dyn_cast<ArrayAttr>(attribute.getValue()))
return failure();
SmallVector<int64_t> values =
extractFromIntegerArrayAttr<int64_t>(attribute.getValue());
generateMetadata(values[0], NVVM::NVVMDialect::getReqntidXName());
if (values.size() > 1)
generateMetadata(values[1], NVVM::NVVMDialect::getReqntidYName());
if (values.size() > 2)
generateMetadata(values[2], NVVM::NVVMDialect::getReqntidZName());
} else if (attribute.getName() ==
NVVM::NVVMDialect::getMinctasmAttrName()) {
auto value = dyn_cast<IntegerAttr>(attribute.getValue());
generateMetadata(value.getInt(), "minctasm");
} else if (attribute.getName() == NVVM::NVVMDialect::getMaxnregAttrName()) {
auto value = dyn_cast<IntegerAttr>(attribute.getValue());
generateMetadata(value.getInt(), "maxnreg");
} else if (attribute.getName() ==
NVVM::NVVMDialect::getKernelFuncAttrName()) {
llvm::Metadata *llvmMetadataKernel[] = {
llvm::ValueAsMetadata::get(llvmFunc),
llvm::MDString::get(llvmContext, "kernel"),
llvm::ValueAsMetadata::get(
llvm::ConstantInt::get(llvm::Type::getInt32Ty(llvmContext), 1))};
llvm::MDNode *llvmMetadataNode =
llvm::MDNode::get(llvmContext, llvmMetadataKernel);
moduleTranslation.getOrInsertNamedModuleMetadata("nvvm.annotations")
->addOperand(llvmMetadataNode);
}
return success();
}
};
} // namespace
void mlir::registerNVVMDialectTranslation(DialectRegistry ®istry) {
registry.insert<NVVM::NVVMDialect>();
registry.addExtension(+[](MLIRContext *ctx, NVVM::NVVMDialect *dialect) {
dialect->addInterfaces<NVVMDialectLLVMIRTranslationInterface>();
});
}
void mlir::registerNVVMDialectTranslation(MLIRContext &context) {
DialectRegistry registry;
registerNVVMDialectTranslation(registry);
context.appendDialectRegistry(registry);
}
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