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57 lines
2.0 KiB
C++
57 lines
2.0 KiB
C++
//===- FPEnv.h ---- FP Environment ------------------------------*- C++ -*-===//
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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 declarations of entities that describe floating
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/// point environment and related functions.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_IR_FPENV_H
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#define LLVM_IR_FPENV_H
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#include "llvm/ADT/FloatingPointMode.h"
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#include "llvm/ADT/Optional.h"
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namespace llvm {
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class StringRef;
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namespace fp {
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/// Exception behavior used for floating point operations.
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///
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/// Each of these values correspond to some metadata argument value of a
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/// constrained floating point intrinsic. See the LLVM Language Reference Manual
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/// for details.
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enum ExceptionBehavior : uint8_t {
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ebIgnore, ///< This corresponds to "fpexcept.ignore".
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ebMayTrap, ///< This corresponds to "fpexcept.maytrap".
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ebStrict ///< This corresponds to "fpexcept.strict".
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};
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}
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/// Returns a valid RoundingMode enumerator when given a string
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/// that is valid as input in constrained intrinsic rounding mode
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/// metadata.
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Optional<RoundingMode> StrToRoundingMode(StringRef);
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/// For any RoundingMode enumerator, returns a string valid as input in
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/// constrained intrinsic rounding mode metadata.
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Optional<StringRef> RoundingModeToStr(RoundingMode);
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/// Returns a valid ExceptionBehavior enumerator when given a string
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/// valid as input in constrained intrinsic exception behavior metadata.
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Optional<fp::ExceptionBehavior> StrToExceptionBehavior(StringRef);
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/// For any ExceptionBehavior enumerator, returns a string valid as
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/// input in constrained intrinsic exception behavior metadata.
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Optional<StringRef> ExceptionBehaviorToStr(fp::ExceptionBehavior);
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}
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#endif
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