Ryan Buchner
2efd5301e4
Allows for fractional InstructionCost's up to a granularity with little overhead. Will allow for more accurate division results and will support finer granularity of TTI costing. Before: InstructionCost(2) / 4 = 0 After (with ScalingFactor 4): InstructionCost(2) / 4 = 1 / 2 Also, there is a decrease in the maximum value of InstructionCost, as the largest value is now `std::numeric_limits<CostType>::max() / ScalingFactor`. Addresses #174429
39 lines
1.4 KiB
C++
39 lines
1.4 KiB
C++
//===- InstructionCost.cpp --------------------------------------*- 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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/// \file
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/// This file includes the function definitions for the InstructionCost class
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/// that is used when calculating the cost of an instruction, or a group of
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/// instructions.
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/InstructionCost.h"
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#include "llvm/Support/Format.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace llvm;
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void InstructionCost::print(raw_ostream &OS) const {
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using UnsignedCostType = std::make_unsigned_t<CostType>;
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if (isValid()) {
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UnsignedCostType AbsValue =
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(Value < 0) ? -((UnsignedCostType)Value) : ((UnsignedCostType)Value);
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UnsignedCostType WholeNumber = AbsValue / CostGranularity;
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UnsignedCostType Remainder = AbsValue % CostGranularity;
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if (Value < 0)
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OS << "-";
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UnsignedCostType RemainderHundreds = (Remainder * 100) / CostGranularity;
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while (RemainderHundreds % 10 == 0 && RemainderHundreds)
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RemainderHundreds /= 10;
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OS << WholeNumber;
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if (RemainderHundreds)
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OS << "." << RemainderHundreds;
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} else {
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OS << "Invalid";
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}
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}
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