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I8080CallingConv.td
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I8080CallingConv.td
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//===- I8080CallingConv.td - Calling Conventions for I8080 -*- 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 I8080 architecture.
//===----------------------------------------------------------------------===//
//===----------------------------------------------------------------------===//
// I8080 Return Value Calling Convention
//===----------------------------------------------------------------------===//
// def RetCC_I8080 : CallingConv<[
// // i32 are returned in registers v0
// CCIfType<[i32], CCAssignToReg<[v0]>>,
// // Integer values get stored in stack slots that are 4 bytes in
// // size and 4-byte aligned.
// CCIfType<[i32], CCAssignToStack<4, 4>>
// ]>;
//===----------------------------------------------------------------------===//
// I8080 Argument Calling Conventions
//===----------------------------------------------------------------------===//
// def CC_I8080 : CallingConv<[
// // Promote i8 arguments to i32.
// CCIfType<[i8], CCPromoteToType<i32>>,
// // Promote i16 arguments to i32.
// CCIfType<[i16], CCPromoteToType<i32>>,
// // The first 5 integer arguments are passed in integer registers.
// CCIfType<[i32], CCAssignToReg<[a0, a1, a2]>>,
// // Integer values get stored in stack slots that are 4 bytes in
// // size and 4-byte aligned.
// CCIfType<[i32], CCAssignToStack<4, 4>>
// ]>;
// def CC_Save : CalleeSavedRegs<(add s0, s1, s2, sp, fp, ra)>;
// Should there be only R7 here?