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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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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,22 @@ | ||
| //===---- 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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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,144 @@ | ||
| //===--- 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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