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comparison llvm/lib/IR/FPEnv.cpp @ 150:1d019706d866

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LLVM10
author anatofuz
date Thu, 13 Feb 2020 15:10:13 +0900
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children 0572611fdcc8
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147:c2174574ed3a 150:1d019706d866
1 //===-- FPEnv.cpp ---- FP Environment -------------------------------------===//
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 /// @file
10 /// This file contains the implementations of entities that describe floating
11 /// point environment.
12 //
13 //===----------------------------------------------------------------------===//
14
15 #include "llvm/ADT/StringSwitch.h"
16 #include "llvm/IR/FPEnv.h"
17
18 namespace llvm {
19
20 Optional<fp::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<fp::RoundingMode>>(RoundingArg)
24 .Case("round.dynamic", fp::rmDynamic)
25 .Case("round.tonearest", fp::rmToNearest)
26 .Case("round.downward", fp::rmDownward)
27 .Case("round.upward", fp::rmUpward)
28 .Case("round.towardzero", fp::rmTowardZero)
29 .Default(None);
30 }
31
32 Optional<StringRef> RoundingModeToStr(fp::RoundingMode UseRounding) {
33 Optional<StringRef> RoundingStr = None;
34 switch (UseRounding) {
35 case fp::rmDynamic:
36 RoundingStr = "round.dynamic";
37 break;
38 case fp::rmToNearest:
39 RoundingStr = "round.tonearest";
40 break;
41 case fp::rmDownward:
42 RoundingStr = "round.downward";
43 break;
44 case fp::rmUpward:
45 RoundingStr = "round.upward";
46 break;
47 case fp::rmTowardZero:
48 RoundingStr = "round.towardzero";
49 break;
50 }
51 return RoundingStr;
52 }
53
54 Optional<fp::ExceptionBehavior> StrToExceptionBehavior(StringRef ExceptionArg) {
55 return StringSwitch<Optional<fp::ExceptionBehavior>>(ExceptionArg)
56 .Case("fpexcept.ignore", fp::ebIgnore)
57 .Case("fpexcept.maytrap", fp::ebMayTrap)
58 .Case("fpexcept.strict", fp::ebStrict)
59 .Default(None);
60 }
61
62 Optional<StringRef> ExceptionBehaviorToStr(fp::ExceptionBehavior UseExcept) {
63 Optional<StringRef> ExceptStr = None;
64 switch (UseExcept) {
65 case fp::ebStrict:
66 ExceptStr = "fpexcept.strict";
67 break;
68 case fp::ebIgnore:
69 ExceptStr = "fpexcept.ignore";
70 break;
71 case fp::ebMayTrap:
72 ExceptStr = "fpexcept.maytrap";
73 break;
74 }
75 return ExceptStr;
76 }
77
78 }