AArch64: initial NEON support
Patch by Ana Pazos
- Completed implementation of instruction formats:
AdvSIMD three same
AdvSIMD modified immediate
AdvSIMD scalar pairwise
- Completed implementation of instruction classes
(some of the instructions in these classes
belong to yet unfinished instruction formats):
Vector Arithmetic
Vector Immediate
Vector Pairwise Arithmetic
- Initial implementation of instruction formats:
AdvSIMD scalar two-reg misc
AdvSIMD scalar three same
- Intial implementation of instruction class:
Scalar Arithmetic
- Initial clang changes to support arm v8 intrinsics.
Note: no clang changes for scalar intrinsics function name mangling yet.
- Comprehensive test cases for added instructions
To verify auto codegen, encoding, decoding, diagnosis, intrinsics.
llvm-svn: 187568
diff --git a/clang/lib/AST/ItaniumMangle.cpp b/clang/lib/AST/ItaniumMangle.cpp
index 76a8bf4..7016ee1 100644
--- a/clang/lib/AST/ItaniumMangle.cpp
+++ b/clang/lib/AST/ItaniumMangle.cpp
@@ -360,6 +360,7 @@
void mangleBareFunctionType(const FunctionType *T,
bool MangleReturnType);
void mangleNeonVectorType(const VectorType *T);
+ void mangleAArch64NeonVectorType(const VectorType *T);
void mangleIntegerLiteral(QualType T, const llvm::APSInt &Value);
void mangleMemberExpr(const Expr *base, bool isArrow,
@@ -2174,7 +2175,9 @@
case BuiltinType::LongLong: EltName = "int64_t"; break;
case BuiltinType::ULongLong: EltName = "uint64_t"; break;
case BuiltinType::Float: EltName = "float32_t"; break;
- default: llvm_unreachable("unexpected Neon vector element type");
+ case BuiltinType::Half: EltName = "float16_t";break;
+ default:
+ llvm_unreachable("unexpected Neon vector element type");
}
}
const char *BaseName = 0;
@@ -2190,6 +2193,70 @@
Out << BaseName << EltName;
}
+static StringRef mangleAArch64VectorBase(const BuiltinType *EltType) {
+ switch (EltType->getKind()) {
+ case BuiltinType::SChar:
+ return "Int8";
+ case BuiltinType::Short:
+ return "Int16";
+ case BuiltinType::Int:
+ return "Int32";
+ case BuiltinType::LongLong:
+ return "Int64";
+ case BuiltinType::UChar:
+ return "Uint8";
+ case BuiltinType::UShort:
+ return "Uint16";
+ case BuiltinType::UInt:
+ return "Uint32";
+ case BuiltinType::ULongLong:
+ return "Uint64";
+ case BuiltinType::Half:
+ return "Float16";
+ case BuiltinType::Float:
+ return "Float32";
+ case BuiltinType::Double:
+ return "Float64";
+ default:
+ llvm_unreachable("Unexpected vector element base type");
+ }
+}
+
+// AArch64's ABI for Neon vector types specifies that they should be mangled as
+// the equivalent internal name. The vector type must be one of the special
+// types predefined by ARM.
+void CXXNameMangler::mangleAArch64NeonVectorType(const VectorType *T) {
+ QualType EltType = T->getElementType();
+ assert(EltType->isBuiltinType() && "Neon vector element not a BuiltinType");
+ unsigned BitSize =
+ (T->getNumElements() * getASTContext().getTypeSize(EltType));
+
+ assert((BitSize == 64 || BitSize == 128) &&
+ "Neon vector type not 64 or 128 bits");
+
+ assert(getASTContext().getTypeSize(EltType) != BitSize &&
+ "Vector of 1 element not permitted");
+
+ StringRef EltName;
+ if (T->getVectorKind() == VectorType::NeonPolyVector) {
+ switch (cast<BuiltinType>(EltType)->getKind()) {
+ case BuiltinType::UChar:
+ EltName = "Poly8";
+ break;
+ case BuiltinType::UShort:
+ EltName = "Poly16";
+ break;
+ default:
+ llvm_unreachable("unexpected Neon polynomial vector element type");
+ }
+ } else
+ EltName = mangleAArch64VectorBase(cast<BuiltinType>(EltType));
+
+ std::string TypeName =
+ ("__" + EltName + "x" + llvm::utostr(T->getNumElements()) + "_t").str();
+ Out << TypeName.length() << TypeName;
+}
+
// GNU extension: vector types
// <type> ::= <vector-type>
// <vector-type> ::= Dv <positive dimension number> _
@@ -2201,7 +2268,11 @@
void CXXNameMangler::mangleType(const VectorType *T) {
if ((T->getVectorKind() == VectorType::NeonVector ||
T->getVectorKind() == VectorType::NeonPolyVector)) {
- mangleNeonVectorType(T);
+ if (getASTContext().getTargetInfo().getTriple().getArch() ==
+ llvm::Triple::aarch64)
+ mangleAArch64NeonVectorType(T);
+ else
+ mangleNeonVectorType(T);
return;
}
Out << "Dv" << T->getNumElements() << '_';