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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
79 lines
2.5 KiB
C++
79 lines
2.5 KiB
C++
//===-- Uops.h --------------------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file
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/// A BenchmarkRunner implementation to measure uop decomposition.
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TOOLS_LLVM_EXEGESIS_UOPS_H
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#define LLVM_TOOLS_LLVM_EXEGESIS_UOPS_H
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#include "BenchmarkRunner.h"
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#include "SnippetGenerator.h"
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namespace llvm {
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namespace exegesis {
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class UopsSnippetGenerator : public SnippetGenerator {
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public:
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UopsSnippetGenerator(const LLVMState &State) : SnippetGenerator(State) {}
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~UopsSnippetGenerator() override;
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llvm::Expected<std::vector<CodeTemplate>>
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generateCodeTemplates(const Instruction &Instr) const override;
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static constexpr const size_t kMinNumDifferentAddresses = 6;
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private:
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// Instantiates memory operands within a snippet.
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// To make computations as parallel as possible, we generate independant
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// memory locations for instructions that load and store. If there are less
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// than kMinNumDifferentAddresses in the original snippet, we duplicate
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// instructions until there are this number of instructions.
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// For example, assuming kMinNumDifferentAddresses=5 and
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// getMaxMemoryAccessSize()=64, if the original snippet is:
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// mov eax, [memory]
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// we might generate:
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// mov eax, [rdi]
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// mov eax, [rdi + 64]
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// mov eax, [rdi + 128]
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// mov eax, [rdi + 192]
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// mov eax, [rdi + 256]
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// If the original snippet is:
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// mov eax, [memory]
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// add eax, [memory]
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// we might generate:
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// mov eax, [rdi]
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// add eax, [rdi + 64]
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// mov eax, [rdi + 128]
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// add eax, [rdi + 192]
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// mov eax, [rdi + 256]
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void instantiateMemoryOperands(
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unsigned ScratchSpaceReg,
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std::vector<InstructionTemplate> &SnippetTemplate) const;
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};
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class UopsBenchmarkRunner : public BenchmarkRunner {
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public:
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UopsBenchmarkRunner(const LLVMState &State)
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: BenchmarkRunner(State, InstructionBenchmark::Uops) {}
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~UopsBenchmarkRunner() override;
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static constexpr const size_t kMinNumDifferentAddresses = 6;
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private:
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llvm::Expected<std::vector<BenchmarkMeasure>>
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runMeasurements(const FunctionExecutor &Executor) const override;
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};
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} // namespace exegesis
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} // namespace llvm
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#endif // LLVM_TOOLS_LLVM_EXEGESIS_UOPS_H
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