tools/llvm-exegesis/lib/RegisterValue.cpp

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