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1 //===-- FPEnv.cpp ---- FP Environment -------------------------------------===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8 //
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9 /// @file
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10 /// This file contains the implementations of entities that describe floating
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11 /// point environment.
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12 //
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13 //===----------------------------------------------------------------------===//
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14
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15 #include "llvm/ADT/StringSwitch.h"
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16 #include "llvm/IR/FPEnv.h"
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17
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18 namespace llvm {
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19
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20 Optional<fp::RoundingMode> StrToRoundingMode(StringRef RoundingArg) {
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21 // For dynamic rounding mode, we use round to nearest but we will set the
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22 // 'exact' SDNodeFlag so that the value will not be rounded.
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23 return StringSwitch<Optional<fp::RoundingMode>>(RoundingArg)
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24 .Case("round.dynamic", fp::rmDynamic)
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25 .Case("round.tonearest", fp::rmToNearest)
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26 .Case("round.downward", fp::rmDownward)
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27 .Case("round.upward", fp::rmUpward)
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28 .Case("round.towardzero", fp::rmTowardZero)
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29 .Default(None);
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30 }
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31
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32 Optional<StringRef> RoundingModeToStr(fp::RoundingMode UseRounding) {
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33 Optional<StringRef> RoundingStr = None;
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34 switch (UseRounding) {
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35 case fp::rmDynamic:
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36 RoundingStr = "round.dynamic";
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37 break;
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38 case fp::rmToNearest:
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39 RoundingStr = "round.tonearest";
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40 break;
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41 case fp::rmDownward:
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42 RoundingStr = "round.downward";
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43 break;
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44 case fp::rmUpward:
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45 RoundingStr = "round.upward";
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46 break;
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47 case fp::rmTowardZero:
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48 RoundingStr = "round.towardzero";
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49 break;
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50 }
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51 return RoundingStr;
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52 }
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53
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54 Optional<fp::ExceptionBehavior> StrToExceptionBehavior(StringRef ExceptionArg) {
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55 return StringSwitch<Optional<fp::ExceptionBehavior>>(ExceptionArg)
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56 .Case("fpexcept.ignore", fp::ebIgnore)
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57 .Case("fpexcept.maytrap", fp::ebMayTrap)
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58 .Case("fpexcept.strict", fp::ebStrict)
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59 .Default(None);
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60 }
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61
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62 Optional<StringRef> ExceptionBehaviorToStr(fp::ExceptionBehavior UseExcept) {
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63 Optional<StringRef> ExceptStr = None;
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64 switch (UseExcept) {
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65 case fp::ebStrict:
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66 ExceptStr = "fpexcept.strict";
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67 break;
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68 case fp::ebIgnore:
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69 ExceptStr = "fpexcept.ignore";
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70 break;
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71 case fp::ebMayTrap:
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72 ExceptStr = "fpexcept.maytrap";
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73 break;
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74 }
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75 return ExceptStr;
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76 }
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77
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78 }
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