+//===----------------------------------------------------------------------===//
+// PowerPC System V Release 4 ABI
+//===----------------------------------------------------------------------===//
+
+def CC_PPC_SVR4_Common : CallingConv<[
+ // The ABI requires i64 to be passed in two adjacent registers with the first
+ // register having an odd register number.
+ CCIfType<[i32], CCIfSplit<CCCustom<"CC_PPC_SVR4_Custom_AlignArgRegs">>>,
+
+ // The first 8 integer arguments are passed in integer registers.
+ CCIfType<[i32], CCAssignToReg<[R3, R4, R5, R6, R7, R8, R9, R10]>>,
+
+ // Make sure the i64 words from a long double are either both passed in
+ // registers or both passed on the stack.
+ CCIfType<[f64], CCIfSplit<CCCustom<"CC_PPC_SVR4_Custom_AlignFPArgRegs">>>,
+
+ // FP values are passed in F1 - F8.
+ CCIfType<[f32, f64], CCAssignToReg<[F1, F2, F3, F4, F5, F6, F7, F8]>>,
+
+ // Split arguments have an alignment of 8 bytes on the stack.
+ CCIfType<[i32], CCIfSplit<CCAssignToStack<4, 8>>>,
+
+ CCIfType<[i32], CCAssignToStack<4, 4>>,
+
+ // Floats are stored in double precision format, thus they have the same
+ // alignment and size as doubles.
+ CCIfType<[f32,f64], CCAssignToStack<8, 8>>,
+
+ // Vectors get 16-byte stack slots that are 16-byte aligned.
+ CCIfType<[v16i8, v8i16, v4i32, v4f32], CCAssignToStack<16, 16>>
+]>;
+
+// This calling convention puts vector arguments always on the stack. It is used
+// to assign vector arguments which belong to the variable portion of the
+// parameter list of a variable argument function.
+def CC_PPC_SVR4_VarArg : CallingConv<[
+ CCDelegateTo<CC_PPC_SVR4_Common>
+]>;
+
+// In contrast to CC_PPC_SVR4_VarArg, this calling convention first tries to put
+// vector arguments in vector registers before putting them on the stack.
+def CC_PPC_SVR4 : CallingConv<[
+ // The first 12 Vector arguments are passed in AltiVec registers.
+ CCIfType<[v16i8, v8i16, v4i32, v4f32],
+ CCAssignToReg<[V2, V3, V4, V5, V6, V7, V8, V9, V10, V11, V12, V13]>>,
+
+ CCDelegateTo<CC_PPC_SVR4_Common>
+]>;
+
+// Helper "calling convention" to handle aggregate by value arguments.
+// Aggregate by value arguments are always placed in the local variable space
+// of the caller. This calling convention is only used to assign those stack
+// offsets in the callers stack frame.
+//
+// Still, the address of the aggregate copy in the callers stack frame is passed
+// in a GPR (or in the parameter list area if all GPRs are allocated) from the
+// caller to the callee. The location for the address argument is assigned by
+// the CC_PPC_SVR4 calling convention.
+//
+// The only purpose of CC_PPC_SVR4_Custom_Dummy is to skip arguments which are
+// not passed by value.
+
+def CC_PPC_SVR4_ByVal : CallingConv<[
+ CCIfByVal<CCPassByVal<4, 4>>,
+
+ CCCustom<"CC_PPC_SVR4_Custom_Dummy">
+]>;
+