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//===-- RegisterValue.h -----------------------------------------*- C++ -*-===//
//
// 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
//
//===----------------------------------------------------------------------===//
///
/// \file
///
/// Defines a Target independent value for a Register. This is useful to explore
/// the influence of the instruction input values on its execution time.
///
//===----------------------------------------------------------------------===//
#ifndef LLVM_TOOLS_LLVM_EXEGESIS_REGISTERVALUE_H
#define LLVM_TOOLS_LLVM_EXEGESIS_REGISTERVALUE_H
#include <llvm/ADT/APFloat.h>
#include <llvm/ADT/APInt.h>
namespace llvm {
namespace exegesis {
// A simple object storing the value for a particular register.
struct RegisterValue {
static RegisterValue zero(unsigned Reg) { return {Reg, llvm::APInt()}; }
unsigned Register;
llvm::APInt Value;
};
enum class PredefinedValues {
POS_ZERO, // Positive zero
NEG_ZERO, // Negative zero
ONE, // 1.0
TWO, // 2.0
INF, // Infinity
QNAN, // Quiet NaN
ULP, // One Unit in the last place
SMALLEST = ULP, // The minimum subnormal number
SMALLEST_NORM, // The minimum normal number
LARGEST, // The maximum normal number
ONE_PLUS_ULP, // The value just after 1.0
};
llvm::APInt bitcastFloatValue(const llvm::fltSemantics &FltSemantics,
PredefinedValues Value);
} // namespace exegesis
} // namespace llvm
#endif // LLVM_TOOLS_LLVM_EXEGESIS_REGISTERVALUE_H
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