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1//===-- CSKYCallingConv.td - Calling Conventions CSKY ----*- tablegen -*---===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8//9// This describes the calling conventions for the CSKY architecture.10//11//===----------------------------------------------------------------------===//12 13def CSR_I32 : CalleeSavedRegs<(add R8, R15, (sequence "R%u", 4, 7),14 (sequence "R%u", 9, 11), (sequence "R%u", 16, 17), R28)>;15def CSR_GPR_FPR32 : CalleeSavedRegs<(add CSR_I32, (sequence "F%u_32", 8, 15))>;16def CSR_GPR_FPR64 : CalleeSavedRegs<(add CSR_I32,17 (sequence "F%u_64", 8, 15))>;18 19// Interrupt handler needs to save/restore all registers that are used,20// both Caller and Callee saved registers.21def CSR_GPR_ISR : CalleeSavedRegs<(add R8, R15,22 (sequence "R%u", 0, 3),23 (sequence "R%u", 4, 7),24 (sequence "R%u", 9, 13),25 (sequence "R%u", 16, 31))>;26 27def CSR_GPR_FPR32_ISR: CalleeSavedRegs<(add CSR_GPR_ISR,28 (sequence "F%u_32", 0, 15))>;29def CSR_GPR_FPR64_ISR: CalleeSavedRegs<(add CSR_GPR_ISR,30 (sequence "F%u_64", 0, 15))>;31 32def CSR_GPR_FPR32v3_ISR: CalleeSavedRegs<(add CSR_GPR_FPR32_ISR,33 (sequence "F%u_32", 16, 31))>;34def CSR_GPR_FPR64v3_ISR: CalleeSavedRegs<(add CSR_GPR_FPR64_ISR,35 (sequence "F%u_64", 16, 31))>;36 37// Needed for implementation of CSKYRegisterInfo::getNoPreservedMask()38def CSR_NoRegs : CalleeSavedRegs<(add)>;39 40def CC_CSKY_ABIV2_SOFT : CallingConv<[41 // DSP types42 CCIfType<[v2i16, v4i8], CCAssignToReg<[R0, R1, R2, R3]>>,43 CCIfType<[v2i16, v4i8], CCAssignToStack<4, 4>>,44 CCIfType<[i8, i16], CCPromoteToType<i32>>,45 CCIfType<[f32], CCAssignToReg<[R0, R1, R2, R3]>>,46 CCIfType<[f32], CCAssignToStack<4, 4>>,47 CCIfType<[i32], CCAssignToReg<[R0, R1, R2, R3]>>,48 CCIfType<[i32], CCAssignToStack<4, 4>>,49 CCIfType<[f64], CCCustom<"CC_CSKY_ABIV2_SOFT_64">>,50 CCIfType<[f64], CCAssignToStack<8, 4>>51]>;52 53def RetCC_CSKY_ABIV2_SOFT : CallingConv<[54 // DSP types55 CCIfType<[v2i16, v4i8], CCAssignToReg<[R0, R1]>>,56 CCIfType<[i8, i16], CCPromoteToType<i32>>,57 CCIfType<[f32], CCBitConvertToType<i32>>,58 CCIfType<[i32], CCAssignToReg<[R0, R1]>>,59 CCIfType<[f64], CCCustom<"Ret_CSKY_ABIV2_SOFT_64">>60]>;61 62def CC_CSKY_ABIV2_FP : CallingConv<[63 // DSP types64 CCIfType<[v2i16, v4i8], CCAssignToReg<[R0, R1, R2, R3]>>,65 CCIfType<[v2i16, v4i8], CCAssignToStack<4, 4>>,66 CCIfType<[i8, i16], CCPromoteToType<i32>>,67 CCIfType<[i32], CCAssignToReg<[R0, R1, R2, R3]>>,68 CCIfType<[i32], CCAssignToStack<4, 4>>,69 CCIfType<[f32], CCAssignToReg<[F0_32, F1_32, F2_32, F3_32]>>,70 CCIfType<[f32], CCAssignToStack<4, 4>>,71 CCIfType<[f64], CCAssignToReg<[F0_64, F1_64, F2_64, F3_64]>>,72 CCIfType<[f64], CCAssignToStack<8, 4>>73]>;74 75def RetCC_CSKY_ABIV2_FP : CallingConv<[76 // DSP types77 CCIfType<[v2i16, v4i8], CCAssignToReg<[R0, R1]>>,78 CCIfType<[i8, i16], CCPromoteToType<i32>>,79 CCIfType<[i32], CCAssignToReg<[R0, R1]>>,80 CCIfType<[f32], CCAssignToReg<[F0_32]>>,81 CCIfType<[f64], CCAssignToReg<[F0_64]>>82]>;83