1//===-- RegisterValue.cpp ---------------------------------------*- 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#include "RegisterValue.h"
10#include "llvm/ADT/APFloat.h"
11#include "llvm/ADT/StringRef.h"
12
13namespace llvm {
14namespace exegesis {
15
16static APFloat getFloatValue(const fltSemantics &FltSemantics,
17 PredefinedValues Value) {
18 switch (Value) {
19 case PredefinedValues::POS_ZERO:
20 return APFloat::getZero(Sem: FltSemantics);
21 case PredefinedValues::NEG_ZERO:
22 return APFloat::getZero(Sem: FltSemantics, Negative: true);
23 case PredefinedValues::ONE:
24 return APFloat(FltSemantics, "1");
25 case PredefinedValues::TWO:
26 return APFloat(FltSemantics, "2");
27 case PredefinedValues::INF:
28 return APFloat::getInf(Sem: FltSemantics);
29 case PredefinedValues::QNAN:
30 return APFloat::getQNaN(Sem: FltSemantics);
31 case PredefinedValues::SMALLEST_NORM:
32 return APFloat::getSmallestNormalized(Sem: FltSemantics);
33 case PredefinedValues::LARGEST:
34 return APFloat::getLargest(Sem: FltSemantics);
35 case PredefinedValues::ULP:
36 return APFloat::getSmallest(Sem: FltSemantics);
37 case PredefinedValues::ONE_PLUS_ULP:
38 auto Output = getFloatValue(FltSemantics, Value: PredefinedValues::ONE);
39 Output.next(nextDown: false);
40 return Output;
41 }
42 llvm_unreachable("Unhandled exegesis::PredefinedValues");
43}
44
45APInt bitcastFloatValue(const fltSemantics &FltSemantics,
46 PredefinedValues Value) {
47 return getFloatValue(FltSemantics, Value).bitcastToAPInt();
48}
49
50} // namespace exegesis
51} // namespace llvm
52