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Re-apply "[clang][Interp] Support floating-point values"
Don't move the Repr struct into Integral this time. Differential Revision: https://reviews.llvm.org/D134859
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//===---- Floating.cpp - Support for floating point values ------*- C++ -*-===// | ||
// | ||
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. | ||
// See https://llvm.org/LICENSE.txt for license information. | ||
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | ||
// | ||
//===----------------------------------------------------------------------===// | ||
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#include "Floating.h" | ||
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namespace clang { | ||
namespace interp { | ||
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llvm::raw_ostream &operator<<(llvm::raw_ostream &OS, Floating F) { | ||
F.print(OS); | ||
return OS; | ||
} | ||
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Floating getSwappedBytes(Floating F) { return F; } | ||
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} // namespace interp | ||
} // namespace clang |
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//===--- Floating.h - Types for the constexpr VM ----------------*- C++ -*-===// | ||
// | ||
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. | ||
// See https://llvm.org/LICENSE.txt for license information. | ||
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | ||
// | ||
//===----------------------------------------------------------------------===// | ||
// | ||
// Defines the VM types and helpers operating on types. | ||
// | ||
//===----------------------------------------------------------------------===// | ||
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#ifndef LLVM_CLANG_AST_INTERP_FLOATING_H | ||
#define LLVM_CLANG_AST_INTERP_FLOATING_H | ||
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#include "Primitives.h" | ||
#include "clang/AST/APValue.h" | ||
#include "llvm/ADT/APFloat.h" | ||
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namespace clang { | ||
namespace interp { | ||
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using APFloat = llvm::APFloat; | ||
using APSInt = llvm::APSInt; | ||
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class Floating final { | ||
private: | ||
// The underlying value storage. | ||
APFloat F; | ||
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public: | ||
/// Zero-initializes a Floating. | ||
Floating() : F(0.0f) {} | ||
Floating(const APFloat &F) : F(F) {} | ||
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// Static constructors for special floating point values. | ||
static Floating getInf(const llvm::fltSemantics &Sem) { | ||
return Floating(APFloat::getInf(Sem)); | ||
} | ||
const APFloat &getAPFloat() const { return F; } | ||
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bool operator<(Floating RHS) const { return F < RHS.F; } | ||
bool operator>(Floating RHS) const { return F > RHS.F; } | ||
bool operator<=(Floating RHS) const { return F <= RHS.F; } | ||
bool operator>=(Floating RHS) const { return F >= RHS.F; } | ||
bool operator==(Floating RHS) const { return F == RHS.F; } | ||
bool operator!=(Floating RHS) const { return F != RHS.F; } | ||
Floating operator-() const { return Floating(-F); } | ||
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APFloat::opStatus convertToInteger(APSInt &Result) const { | ||
bool IsExact; | ||
return F.convertToInteger(Result, llvm::APFloat::rmTowardZero, &IsExact); | ||
} | ||
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Floating toSemantics(const llvm::fltSemantics *Sem, | ||
llvm::RoundingMode RM) const { | ||
APFloat Copy = F; | ||
bool LosesInfo; | ||
Copy.convert(*Sem, RM, &LosesInfo); | ||
(void)LosesInfo; | ||
return Floating(Copy); | ||
} | ||
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/// Convert this Floating to one with the same semantics as \Other. | ||
Floating toSemantics(const Floating &Other, llvm::RoundingMode RM) const { | ||
return toSemantics(&Other.F.getSemantics(), RM); | ||
} | ||
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APSInt toAPSInt(unsigned NumBits = 0) const { | ||
return APSInt(F.bitcastToAPInt()); | ||
} | ||
APValue toAPValue() const { return APValue(F); } | ||
void print(llvm::raw_ostream &OS) const { | ||
// Can't use APFloat::print() since it appends a newline. | ||
SmallVector<char, 16> Buffer; | ||
F.toString(Buffer); | ||
OS << Buffer; | ||
} | ||
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unsigned bitWidth() const { return F.semanticsSizeInBits(F.getSemantics()); } | ||
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bool isSigned() const { return true; } | ||
bool isNegative() const { return F.isNegative(); } | ||
bool isPositive() const { return !F.isNegative(); } | ||
bool isZero() const { return F.isZero(); } | ||
bool isNonZero() const { return F.isNonZero(); } | ||
bool isMin() const { return F.isSmallest(); } | ||
bool isMinusOne() const { return F.isExactlyValue(-1.0); } | ||
bool isNan() const { return F.isNaN(); } | ||
bool isFinite() const { return F.isFinite(); } | ||
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ComparisonCategoryResult compare(const Floating &RHS) const { | ||
return Compare(F, RHS.F); | ||
} | ||
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static APFloat::opStatus fromIntegral(APSInt Val, | ||
const llvm::fltSemantics &Sem, | ||
llvm::RoundingMode RM, | ||
Floating &Result) { | ||
APFloat F = APFloat(Sem); | ||
APFloat::opStatus Status = F.convertFromAPInt(Val, Val.isSigned(), RM); | ||
Result = Floating(F); | ||
return Status; | ||
} | ||
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// ------- | ||
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static APFloat::opStatus add(Floating A, Floating B, llvm::RoundingMode RM, | ||
Floating *R) { | ||
*R = Floating(A.F); | ||
return R->F.add(B.F, RM); | ||
} | ||
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static APFloat::opStatus sub(Floating A, Floating B, llvm::RoundingMode RM, | ||
Floating *R) { | ||
*R = Floating(A.F); | ||
return R->F.subtract(B.F, RM); | ||
} | ||
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static APFloat::opStatus mul(Floating A, Floating B, llvm::RoundingMode RM, | ||
Floating *R) { | ||
*R = Floating(A.F); | ||
return R->F.multiply(B.F, RM); | ||
} | ||
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static APFloat::opStatus div(Floating A, Floating B, llvm::RoundingMode RM, | ||
Floating *R) { | ||
*R = Floating(A.F); | ||
return R->F.divide(B.F, RM); | ||
} | ||
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static bool neg(Floating A, Floating *R) { | ||
*R = -A; | ||
return false; | ||
} | ||
}; | ||
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llvm::raw_ostream &operator<<(llvm::raw_ostream &OS, Floating F); | ||
Floating getSwappedBytes(Floating F); | ||
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} // namespace interp | ||
} // namespace clang | ||
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#endif |
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