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 
13 namespace llvm {
14 namespace exegesis {
15 
16 static APFloat getFloatValue(const fltSemantics &FltSemantics,
17                              PredefinedValues Value) {
18   switch (Value) {
19   case PredefinedValues::POS_ZERO:
20     return APFloat::getZero(FltSemantics);
21   case PredefinedValues::NEG_ZERO:
22     return APFloat::getZero(FltSemantics, 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(FltSemantics);
29   case PredefinedValues::QNAN:
30     return APFloat::getQNaN(FltSemantics);
31   case PredefinedValues::SMALLEST_NORM:
32     return APFloat::getSmallestNormalized(FltSemantics);
33   case PredefinedValues::LARGEST:
34     return APFloat::getLargest(FltSemantics);
35   case PredefinedValues::ULP:
36     return APFloat::getSmallest(FltSemantics);
37   case PredefinedValues::ONE_PLUS_ULP:
38     auto Output = getFloatValue(FltSemantics, PredefinedValues::ONE);
39     Output.next(false);
40     return Output;
41   }
42   llvm_unreachable("Unhandled exegesis::PredefinedValues");
43 }
44 
45 APInt bitcastFloatValue(const fltSemantics &FltSemantics,
46                         PredefinedValues Value) {
47   return getFloatValue(FltSemantics, Value).bitcastToAPInt();
48 }
49 
50 } // namespace exegesis
51 } // namespace llvm
52