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//===- MipsCallingConv.td - Calling Conventions for Mips --------*- C++ -*-===//
//
// 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 Mips architecture.
//===----------------------------------------------------------------------===//
/// CCIfSubtarget - Match if the current subtarget has a feature F.
class CCIfSubtarget<string F, CCAction A>:
CCIf<!strconcat("State.getTarget().getSubtarget<MipsSubtarget>().", F), A>;
//===----------------------------------------------------------------------===//
// Mips Return Value Calling Convention
//===----------------------------------------------------------------------===//
def RetCC_Mips : CallingConv<[
// i32 are returned in registers V0, V1
CCIfType<[i32], CCAssignToReg<[V0, V1]>>
]>;
//===----------------------------------------------------------------------===//
// Mips Argument Calling Conventions
//===----------------------------------------------------------------------===//
def CC_Mips : CallingConv<[
// Promote i8/i16 arguments to i32.
CCIfType<[i8, i16], CCPromoteToType<i32>>,
// The first 4 integer arguments are passed in integer registers.
CCIfType<[i32], CCAssignToReg<[A0, A1, A2, A3]>>,
// Integer values get stored in stack slots that are 4 bytes in
// size and 4-byte aligned.
CCIfType<[i32], CCAssignToStack<4, 4>>
]>;
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