1 //===-- FPEnv.cpp ---- FP Environment -------------------------------------===//
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
7 //===----------------------------------------------------------------------===//
10 /// This file contains the implementations of entities that describe floating
11 /// point environment.
13 //===----------------------------------------------------------------------===//
15 #include "llvm/IR/FPEnv.h"
16 #include "llvm/ADT/StringSwitch.h"
20 Optional<RoundingMode> StrToRoundingMode(StringRef RoundingArg) {
21 // For dynamic rounding mode, we use round to nearest but we will set the
22 // 'exact' SDNodeFlag so that the value will not be rounded.
23 return StringSwitch<Optional<RoundingMode>>(RoundingArg)
24 .Case("round.dynamic", RoundingMode::Dynamic)
25 .Case("round.tonearest", RoundingMode::NearestTiesToEven)
26 .Case("round.tonearestaway", RoundingMode::NearestTiesToAway)
27 .Case("round.downward", RoundingMode::TowardNegative)
28 .Case("round.upward", RoundingMode::TowardPositive)
29 .Case("round.towardzero", RoundingMode::TowardZero)
33 Optional<StringRef> RoundingModeToStr(RoundingMode UseRounding) {
34 Optional<StringRef> RoundingStr = None;
35 switch (UseRounding) {
36 case RoundingMode::Dynamic:
37 RoundingStr = "round.dynamic";
39 case RoundingMode::NearestTiesToEven:
40 RoundingStr = "round.tonearest";
42 case RoundingMode::NearestTiesToAway:
43 RoundingStr = "round.tonearestaway";
45 case RoundingMode::TowardNegative:
46 RoundingStr = "round.downward";
48 case RoundingMode::TowardPositive:
49 RoundingStr = "round.upward";
51 case RoundingMode::TowardZero:
52 RoundingStr = "round.towardzero";
60 Optional<fp::ExceptionBehavior> StrToExceptionBehavior(StringRef ExceptionArg) {
61 return StringSwitch<Optional<fp::ExceptionBehavior>>(ExceptionArg)
62 .Case("fpexcept.ignore", fp::ebIgnore)
63 .Case("fpexcept.maytrap", fp::ebMayTrap)
64 .Case("fpexcept.strict", fp::ebStrict)
68 Optional<StringRef> ExceptionBehaviorToStr(fp::ExceptionBehavior UseExcept) {
69 Optional<StringRef> ExceptStr = None;
72 ExceptStr = "fpexcept.strict";
75 ExceptStr = "fpexcept.ignore";
78 ExceptStr = "fpexcept.maytrap";