50 lines
1.8 KiB
TableGen
50 lines
1.8 KiB
TableGen
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//===- LanaiCallingConv.td - Calling Conventions Lanai -------*- 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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//
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// This describes the calling conventions for the Lanai architectures.
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//
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//===----------------------------------------------------------------------===//
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//===----------------------------------------------------------------------===//
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// Return Value Calling Conventions
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//===----------------------------------------------------------------------===//
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// Lanai 32-bit C Calling convention.
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def CC_Lanai32 : CallingConv<[
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// Promote i8/i16 args to i32
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CCIfType<[i8, i16], CCPromoteToType<i32>>,
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// Put argument in registers if marked 'inreg' and not a vararg call.
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CCIfNotVarArg<CCIfInReg<CCIfType<[i32],
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CCAssignToReg<[R6, R7, R18, R19]>>>>,
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// Otherwise they are assigned to the stack in 4-byte aligned units.
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CCAssignToStack<4, 4>
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]>;
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// Lanai 32-bit Fast Calling convention.
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def CC_Lanai32_Fast : CallingConv<[
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// Promote i8/i16 args to i32
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CCIfType<[ i8, i16 ], CCPromoteToType<i32>>,
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// Put arguments in registers.
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CCIfNotVarArg<CCIfType<[i32], CCAssignToReg<[ R6, R7, R18, R19 ]>>>,
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// Otherwise they are assigned to the stack in 4-byte aligned units.
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CCAssignToStack<4, 4>
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]>;
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// Lanai 32-bit C return-value convention.
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def RetCC_Lanai32 : CallingConv<[
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// Specify two registers to allow returning 64-bit results that have already
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// been lowered to 2 32-bit values.
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CCIfType<[i32], CCAssignToReg<[RV, R9]>>
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]>;
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def CSR: CalleeSavedRegs<(add)>;
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