Commit fae0dfa6 authored by Qiu Chaofan's avatar Qiu Chaofan
Browse files

[Clang] Add __ibm128 type to represent ppc_fp128 

Currently, we have no front-end type for ppc_fp128 type in IR. PowerPC
target generates ppc_fp128 type from long double now, but there's option
(-mabi=(ieee|ibm)longdouble) to control it and we're going to do
transition from IBM extended double-double ppc_fp128 to IEEE fp128 in
the future.

This patch adds type __ibm128 which always represents ppc_fp128 in IR,
as what GCC did for that type. Without this type in Clang, compilation
will fail if compiling against future version of libstdcxx (which uses
__ibm128 in headers).

Although all operations in backend for __ibm128 is done by software,
only PowerPC enables support for it.

There's something not implemented in this commit, which can be done in
future ones:

- Literal suffix for __ibm128 type. w/W is suitable as GCC documented.
- __attribute__((mode(IF))) should be for __ibm128.
- Complex __ibm128 type.

Reviewed By: rjmccall

Differential Revision: https://reviews.llvm.org/D93377
parent 96f6785b

clang/bindings/python/clang/cindex.py

+1 −0
Original line number Diff line number Diff line
@@ -2059,6 +2059,7 @@ TypeKind.OBJCCLASS = TypeKind(28) 
TypeKind.OBJCSEL = TypeKind(29)

TypeKind.FLOAT128 = TypeKind(30)

TypeKind.HALF = TypeKind(31)

TypeKind.IBM128 = TypeKind(40)

TypeKind.COMPLEX = TypeKind(100)

TypeKind.POINTER = TypeKind(101)

TypeKind.BLOCKPOINTER = TypeKind(102)

clang/include/clang-c/Index.h

+2 −1
Original line number Diff line number Diff line
@@ -3298,8 +3298,9 @@ enum CXTypeKind { 
  CXType_UAccum = 37,

  CXType_ULongAccum = 38,

  CXType_BFloat16 = 39,

  CXType_Ibm128 = 40,

  CXType_FirstBuiltin = CXType_Void,

  CXType_LastBuiltin = CXType_BFloat16,

  CXType_LastBuiltin = CXType_Ibm128,



  CXType_Complex = 100,

  CXType_Pointer = 101,

clang/include/clang/AST/ASTContext.h

+1 −1
Original line number Diff line number Diff line
@@ -1076,7 +1076,7 @@ public: 
  CanQualType SignedCharTy, ShortTy, IntTy, LongTy, LongLongTy, Int128Ty;

  CanQualType UnsignedCharTy, UnsignedShortTy, UnsignedIntTy, UnsignedLongTy;

  CanQualType UnsignedLongLongTy, UnsignedInt128Ty;

  CanQualType FloatTy, DoubleTy, LongDoubleTy, Float128Ty;

  CanQualType FloatTy, DoubleTy, LongDoubleTy, Float128Ty, Ibm128Ty;

  CanQualType ShortAccumTy, AccumTy,

      LongAccumTy;  // ISO/IEC JTC1 SC22 WG14 N1169 Extension

  CanQualType UnsignedShortAccumTy, UnsignedAccumTy, UnsignedLongAccumTy;

clang/include/clang/AST/BuiltinTypes.def

+3 −0
Original line number Diff line number Diff line
@@ -218,6 +218,9 @@ FLOATING_TYPE(BFloat16, BFloat16Ty) 
// '__float128'

FLOATING_TYPE(Float128, Float128Ty)



// '__ibm128'

FLOATING_TYPE(Ibm128, Ibm128Ty)



//===- Language-specific types --------------------------------------------===//



// This is the type of C++0x 'nullptr'.

clang/include/clang/AST/Type.h

+6 −1
Original line number Diff line number Diff line
@@ -2003,6 +2003,7 @@ public: 
  bool isFloat16Type() const;      // C11 extension ISO/IEC TS 18661

  bool isBFloat16Type() const;

  bool isFloat128Type() const;

  bool isIbm128Type() const;

  bool isRealType() const;         // C99 6.2.5p17 (real floating + integer)

  bool isArithmeticType() const;   // C99 6.2.5p18 (integer + floating)

  bool isVoidType() const;         // C99 6.2.5p19
@@ -2550,7 +2551,7 @@ public: 
  }



  bool isFloatingPoint() const {

    return getKind() >= Half && getKind() <= Float128;

    return getKind() >= Half && getKind() <= Ibm128;

  }



  /// Determines whether the given kind corresponds to a placeholder type.
@@ -6973,6 +6974,10 @@ inline bool Type::isFloat128Type() const { 
  return isSpecificBuiltinType(BuiltinType::Float128);

}



inline bool Type::isIbm128Type() const {

  return isSpecificBuiltinType(BuiltinType::Ibm128);

}



inline bool Type::isNullPtrType() const {

  return isSpecificBuiltinType(BuiltinType::NullPtr);

}