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37 lines
1.5 KiB
TableGen
37 lines
1.5 KiB
TableGen
//==- MSP430CallingConv.td - Calling Conventions for MSP430 -*- tablegen -*-==//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// This describes the calling conventions for MSP430 architecture.
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//===----------------------------------------------------------------------===//
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//===----------------------------------------------------------------------===//
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// MSP430 Return Value Calling Convention
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//===----------------------------------------------------------------------===//
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def RetCC_MSP430 : CallingConv<[
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// i8 are returned in registers R12B, R13B, R14B, R15B
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CCIfType<[i8], CCAssignToReg<[R12B, R13B, R14B, R15B]>>,
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// i16 are returned in registers R12, R13, R14, R15
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CCIfType<[i16], CCAssignToReg<[R12, R13, R14, R15]>>
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]>;
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//===----------------------------------------------------------------------===//
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// MSP430 Argument Calling Conventions
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//===----------------------------------------------------------------------===//
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def CC_MSP430_AssignStack : CallingConv<[
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// Pass by value if the byval attribute is given
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CCIfByVal<CCPassByVal<2, 2>>,
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// Promote i8 arguments to i16.
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CCIfType<[i8], CCPromoteToType<i16>>,
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// Integer values get stored in stack slots that are 2 bytes in
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// size and 2-byte aligned.
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CCIfType<[i16], CCAssignToStack<2, 2>>
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]>;
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