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//===- LanaiRegisterInfo.td - Lanai Register defs ------------*- tablegen -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// Declarations that describe the Lanai register file
//===----------------------------------------------------------------------===//
// Registers are identified with 5-bit ID numbers.
class LanaiReg<bits<5> num, string n, list<Register> subregs = [],
list<string> altNames = []> : Register<n, altNames> {
field bits<5> Num;
let Num = num;
let Namespace = "Lanai";
let SubRegs = subregs;
}
let Namespace = "Lanai" in {
def sub_32 : SubRegIndex<32>;
}
// Integer registers
foreach i = 0-31 in {
def R#i : LanaiReg<i, "r"#i>, DwarfRegNum<[i]>;
}
// Register aliases
let SubRegIndices = [sub_32] in {
def PC : LanaiReg< 2, "pc", [R2]>, DwarfRegAlias<R2>;
def SP : LanaiReg< 4, "sp", [R4]>, DwarfRegAlias<R4>;
def FP : LanaiReg< 5, "fp", [R5]>, DwarfRegAlias<R5>;
def RV : LanaiReg< 8, "rv", [R8]>, DwarfRegAlias<R8>;
def RR1 : LanaiReg<10, "rr1", [R10]>, DwarfRegAlias<R10>;
def RR2 : LanaiReg<11, "rr2", [R11]>, DwarfRegAlias<R11>;
def RCA : LanaiReg<15, "rca", [R15]>, DwarfRegAlias<R15>;
}
// Define a status register to capture the dependencies between the set flag
// and setcc instructions
def SR : LanaiReg< 0, "sw">;
// Register classes.
def GPR : RegisterClass<"Lanai", [i32], 32,
(add R3, R9, R12, R13, R14, R16, R17,
(sequence "R%i", 20, 31),
R6, R7, R18, R19, // registers for passing arguments
R15, RCA, // register for constant addresses
R10, RR1, R11, RR2, // programmer controlled registers
R8, RV, // return value
R5, FP, // frame pointer
R4, SP, // stack pointer
R2, PC, // program counter
R1, // all 1s (0xffffffff)
R0 // constant 0
)>;
// Condition code register class
def CCR : RegisterClass<"Lanai", [i32], 32, (add SR)> {
let CopyCost = -1; // Don't allow copying of status registers
let isAllocatable = 0;
}
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