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-//=- SystemZCallingConv.td - Calling Conventions for SystemZ -*- tablegen -*-=//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-// This describes the calling conventions for SystemZ architecture.
-//===----------------------------------------------------------------------===//
-
-//===----------------------------------------------------------------------===//
-// SystemZ Return Value Calling Convention
-//===----------------------------------------------------------------------===//
-def RetCC_SystemZ : CallingConv<[
- // Promote i8/i16/i32 arguments to i64.
- CCIfType<[i8, i16, i32], CCPromoteToType<i64>>,
-
- // i64 is returned in register R2
- CCIfType<[i64], CCAssignToReg<[R2D, R3D, R4D, R5D]>>,
-
- // f32 / f64 are returned in F0
- CCIfType<[f32], CCAssignToReg<[F0S, F2S, F4S, F6S]>>,
- CCIfType<[f64], CCAssignToReg<[F0L, F2L, F4L, F6L]>>
-]>;
-
-//===----------------------------------------------------------------------===//
-// SystemZ Argument Calling Conventions
-//===----------------------------------------------------------------------===//
-def CC_SystemZ : CallingConv<[
- // Promote i8/i16/i32 arguments to i64.
- CCIfType<[i8, i16, i32], CCPromoteToType<i64>>,
-
- // The first 5 integer arguments of non-varargs functions are passed in
- // integer registers.
- CCIfType<[i64], CCAssignToReg<[R2D, R3D, R4D, R5D, R6D]>>,
-
- // The first 4 floating point arguments of non-varargs functions are passed
- // in FP registers.
- CCIfType<[f32], CCAssignToReg<[F0S, F2S, F4S, F6S]>>,
- CCIfType<[f64], CCAssignToReg<[F0L, F2L, F4L, F6L]>>,
-
- // Integer values get stored in stack slots that are 8 bytes in
- // size and 8-byte aligned.
- CCIfType<[i64, f32, f64], CCAssignToStack<8, 8>>
-]>;