1//===-- RegisterValue.h -----------------------------------------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8///
9/// \file
10///
11/// Defines a Target independent value for a Register. This is useful to explore
12/// the influence of the instruction input values on its execution time.
13///
14//===----------------------------------------------------------------------===//
15
16#ifndef LLVM_TOOLS_LLVM_EXEGESIS_REGISTERVALUE_H
17#define LLVM_TOOLS_LLVM_EXEGESIS_REGISTERVALUE_H
18
19#include <llvm/ADT/APFloat.h>
20#include <llvm/ADT/APInt.h>
21#include <llvm/MC/MCRegister.h>
22
23namespace llvm {
24namespace exegesis {
25
26// A simple object storing the value for a particular register.
27struct RegisterValue {
28 static RegisterValue zero(MCRegister Reg) { return {.Register: Reg, .Value: APInt()}; }
29 MCRegister Register;
30 APInt Value;
31};
32
33enum class PredefinedValues {
34 POS_ZERO, // Positive zero
35 NEG_ZERO, // Negative zero
36 ONE, // 1.0
37 TWO, // 2.0
38 INF, // Infinity
39 QNAN, // Quiet NaN
40 ULP, // One Unit in the last place
41 SMALLEST = ULP, // The minimum subnormal number
42 SMALLEST_NORM, // The minimum normal number
43 LARGEST, // The maximum normal number
44 ONE_PLUS_ULP, // The value just after 1.0
45};
46
47APInt bitcastFloatValue(const fltSemantics &FltSemantics,
48 PredefinedValues Value);
49
50} // namespace exegesis
51} // namespace llvm
52
53#endif // LLVM_TOOLS_LLVM_EXEGESIS_REGISTERVALUE_H
54