c3e56cd12c
nvvm.shfl.sync.bfly optionally returns a predicate whether source lane was active. Support for this was added to clang in https://reviews.llvm.org/D68892. Add an optional 'pred' unit attribute to the instruction to return this predicate. Specify this attribute in the partial warp reduction so we don't need to manually compute the predicate. PiperOrigin-RevId: 275616564
138 lines
5.0 KiB
C++
138 lines
5.0 KiB
C++
//===- NVVMDialect.cpp - NVVM IR Ops and Dialect registration -------------===//
|
|
//
|
|
// Copyright 2019 The MLIR Authors.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
// =============================================================================
|
|
//
|
|
// This file defines the types and operation details for the NVVM IR dialect in
|
|
// MLIR, and the LLVM IR dialect. It also registers the dialect.
|
|
//
|
|
// The NVVM dialect only contains GPU specific additions on top of the general
|
|
// LLVM dialect.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "mlir/Dialect/LLVMIR/NVVMDialect.h"
|
|
|
|
#include "mlir/Dialect/LLVMIR/LLVMDialect.h"
|
|
#include "mlir/IR/Builders.h"
|
|
#include "mlir/IR/MLIRContext.h"
|
|
#include "mlir/IR/Operation.h"
|
|
#include "mlir/IR/OperationSupport.h"
|
|
#include "mlir/IR/StandardTypes.h"
|
|
#include "llvm/AsmParser/Parser.h"
|
|
#include "llvm/IR/Attributes.h"
|
|
#include "llvm/IR/Function.h"
|
|
#include "llvm/IR/Type.h"
|
|
#include "llvm/Support/SourceMgr.h"
|
|
|
|
namespace mlir {
|
|
namespace NVVM {
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Printing/parsing for NVVM ops
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
static void printNVVMIntrinsicOp(OpAsmPrinter &p, Operation *op) {
|
|
p << op->getName() << " ";
|
|
p.printOperands(op->getOperands());
|
|
if (op->getNumResults() > 0)
|
|
interleaveComma(op->getResultTypes(), p << " : ");
|
|
}
|
|
|
|
// <operation> ::= `llvm.nvvm.XYZ` : type
|
|
static ParseResult parseNVVMSpecialRegisterOp(OpAsmParser &parser,
|
|
OperationState &result) {
|
|
Type type;
|
|
if (parser.parseOptionalAttributeDict(result.attributes) ||
|
|
parser.parseColonType(type))
|
|
return failure();
|
|
|
|
result.addTypes(type);
|
|
return success();
|
|
}
|
|
|
|
static LLVM::LLVMDialect *getLlvmDialect(OpAsmParser &parser) {
|
|
return parser.getBuilder()
|
|
.getContext()
|
|
->getRegisteredDialect<LLVM::LLVMDialect>();
|
|
}
|
|
|
|
// <operation> ::=
|
|
// `llvm.nvvm.shfl.sync.bfly %dst, %val, %offset, %clamp_and_mask`
|
|
// ({return_value_and_is_valid})? : result_type
|
|
static ParseResult parseNVVMShflSyncBflyOp(OpAsmParser &parser,
|
|
OperationState &result) {
|
|
SmallVector<OpAsmParser::OperandType, 8> ops;
|
|
Type resultType;
|
|
if (parser.parseOperandList(ops) ||
|
|
parser.parseOptionalAttributeDict(result.attributes) ||
|
|
parser.parseColonType(resultType) ||
|
|
parser.addTypeToList(resultType, result.types))
|
|
return failure();
|
|
|
|
auto type = resultType.cast<LLVM::LLVMType>();
|
|
for (auto &attr : result.attributes) {
|
|
if (attr.first != "return_value_and_is_valid")
|
|
continue;
|
|
if (type.isStructTy() && type.getStructNumElements() > 0)
|
|
type = type.getStructElementType(0);
|
|
break;
|
|
}
|
|
|
|
auto int32Ty = LLVM::LLVMType::getInt32Ty(getLlvmDialect(parser));
|
|
return parser.resolveOperands(ops, {int32Ty, type, int32Ty, int32Ty},
|
|
parser.getNameLoc(), result.operands);
|
|
}
|
|
|
|
// <operation> ::= `llvm.nvvm.vote.ballot.sync %mask, %pred` : result_type
|
|
static ParseResult parseNVVMVoteBallotOp(OpAsmParser &parser,
|
|
OperationState &result) {
|
|
auto llvmDialect = getLlvmDialect(parser);
|
|
auto int32Ty = LLVM::LLVMType::getInt32Ty(llvmDialect);
|
|
auto int1Ty = LLVM::LLVMType::getInt1Ty(llvmDialect);
|
|
|
|
SmallVector<OpAsmParser::OperandType, 8> ops;
|
|
Type type;
|
|
return failure(parser.parseOperandList(ops) ||
|
|
parser.parseOptionalAttributeDict(result.attributes) ||
|
|
parser.parseColonType(type) ||
|
|
parser.addTypeToList(type, result.types) ||
|
|
parser.resolveOperands(ops, {int32Ty, int1Ty},
|
|
parser.getNameLoc(), result.operands));
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// NVVMDialect initialization, type parsing, and registration.
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// TODO(herhut): This should be the llvm.nvvm dialect once this is supported.
|
|
NVVMDialect::NVVMDialect(MLIRContext *context) : Dialect("nvvm", context) {
|
|
addOperations<
|
|
#define GET_OP_LIST
|
|
#include "mlir/Dialect/LLVMIR/NVVMOps.cpp.inc"
|
|
>();
|
|
|
|
// Support unknown operations because not all NVVM operations are registered.
|
|
allowUnknownOperations();
|
|
}
|
|
|
|
#define GET_OP_CLASSES
|
|
#include "mlir/Dialect/LLVMIR/NVVMOps.cpp.inc"
|
|
|
|
static DialectRegistration<NVVMDialect> nvvmDialect;
|
|
|
|
} // namespace NVVM
|
|
} // namespace mlir
|