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f292ec9784
LLVM has removed `make*ArrayRef`, migrate all references to their constructor equivalent.
76 lines
2.4 KiB
C++
76 lines
2.4 KiB
C++
//===--- Numeric.h - Swift Language ABI numerics support --------*- C++ -*-===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// Swift runtime support for numeric operations.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_RUNTIME_NUMERIC_H
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#define SWIFT_RUNTIME_NUMERIC_H
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#include "swift/ABI/MetadataValues.h"
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#include "swift/Runtime/Config.h"
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#include "swift/Basic/LLVM.h"
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#include "llvm/ADT/ArrayRef.h"
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namespace swift {
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/// A constant integer literal. The format is designed to optimize the
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/// checked-truncation operation typically performed by conformances to the
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/// ExpressibleByBuiltinIntegerLiteral protocol.
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class IntegerLiteral {
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public:
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using SignedChunk = intptr_t;
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using UnsignedChunk = uintptr_t;
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enum : size_t { BitsPerChunk = sizeof(SignedChunk) * 8 };
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private:
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const UnsignedChunk *Data;
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IntegerLiteralFlags Flags;
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public:
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constexpr IntegerLiteral(const UnsignedChunk *data, IntegerLiteralFlags flags)
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: Data(data), Flags(flags) {}
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/// Return the chunks of data making up this value, arranged starting from
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/// the least-significant chunk. The value is sign-extended to fill the
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/// final chunk.
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llvm::ArrayRef<UnsignedChunk> getData() const {
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return llvm::ArrayRef(Data, (Flags.getBitWidth() + BitsPerChunk - 1) /
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BitsPerChunk);
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}
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/// The flags for this value.
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IntegerLiteralFlags getFlags() const { return Flags; }
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/// Whether this value is negative.
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bool isNegative() const { return Flags.isNegative(); }
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/// The minimum number of bits necessary to store this value.
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/// Because this always includes the sign bit, it is never zero.
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size_t getBitWidth() const { return Flags.getBitWidth(); }
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};
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SWIFT_RUNTIME_EXPORT SWIFT_CC(swift)
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float swift_intToFloat32(IntegerLiteral value);
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SWIFT_RUNTIME_EXPORT SWIFT_CC(swift)
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double swift_intToFloat64(IntegerLiteral value);
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// TODO: Float16 instead of just truncating from float?
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// TODO: Float80 on x86?
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// TODO: Float128 on targets that provide it?
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}
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#endif
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