forked from OSchip/llvm-project
79 lines
2.3 KiB
C++
79 lines
2.3 KiB
C++
//===-- FPEnv.cpp ---- FP Environment -------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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/// @file
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/// This file contains the implementations of entities that describe floating
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/// point environment.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ADT/StringSwitch.h"
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#include "llvm/IR/FPEnv.h"
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namespace llvm {
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Optional<fp::RoundingMode> StrToRoundingMode(StringRef RoundingArg) {
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// For dynamic rounding mode, we use round to nearest but we will set the
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// 'exact' SDNodeFlag so that the value will not be rounded.
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return StringSwitch<Optional<fp::RoundingMode>>(RoundingArg)
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.Case("round.dynamic", fp::rmDynamic)
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.Case("round.tonearest", fp::rmToNearest)
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.Case("round.downward", fp::rmDownward)
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.Case("round.upward", fp::rmUpward)
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.Case("round.towardzero", fp::rmTowardZero)
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.Default(None);
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}
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Optional<StringRef> RoundingModeToStr(fp::RoundingMode UseRounding) {
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Optional<StringRef> RoundingStr = None;
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switch (UseRounding) {
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case fp::rmDynamic:
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RoundingStr = "round.dynamic";
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break;
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case fp::rmToNearest:
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RoundingStr = "round.tonearest";
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break;
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case fp::rmDownward:
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RoundingStr = "round.downward";
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break;
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case fp::rmUpward:
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RoundingStr = "round.upward";
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break;
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case fp::rmTowardZero:
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RoundingStr = "round.towardzero";
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break;
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}
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return RoundingStr;
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}
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Optional<fp::ExceptionBehavior> StrToExceptionBehavior(StringRef ExceptionArg) {
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return StringSwitch<Optional<fp::ExceptionBehavior>>(ExceptionArg)
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.Case("fpexcept.ignore", fp::ebIgnore)
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.Case("fpexcept.maytrap", fp::ebMayTrap)
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.Case("fpexcept.strict", fp::ebStrict)
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.Default(None);
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}
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Optional<StringRef> ExceptionBehaviorToStr(fp::ExceptionBehavior UseExcept) {
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Optional<StringRef> ExceptStr = None;
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switch (UseExcept) {
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case fp::ebStrict:
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ExceptStr = "fpexcept.strict";
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break;
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case fp::ebIgnore:
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ExceptStr = "fpexcept.ignore";
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break;
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case fp::ebMayTrap:
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ExceptStr = "fpexcept.maytrap";
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break;
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}
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return ExceptStr;
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}
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}
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