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//===-- BPFRegisterInfo.td - BPF 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 BPF register file
//===----------------------------------------------------------------------===//
let Namespace = "BPF" in {
def sub_32 : SubRegIndex<32>;
}
class Wi<bits<16> Enc, string n> : Register<n> {
let HWEncoding = Enc;
let Namespace = "BPF";
}
// Registers are identified with 4-bit ID numbers.
// Ri - 64-bit integer registers
class Ri<bits<16> Enc, string n, list<Register> subregs>
: RegisterWithSubRegs<n, subregs> {
let HWEncoding = Enc;
let Namespace = "BPF";
let SubRegIndices = [sub_32];
}
foreach I = 0-11 in {
// 32-bit Integer (alias to low part of 64-bit register).
def W#I : Wi<I, "w"#I>, DwarfRegNum<[I]>;
// 64-bit Integer registers
def R#I : Ri<I, "r"#I, [!cast<Wi>("W"#I)]>, DwarfRegNum<[I]>;
}
// Register classes.
def GPR32 : RegisterClass<"BPF", [i32], 64, (add
(sequence "W%u", 1, 9),
W0, // Return value
W11, // Stack Ptr
W10 // Frame Ptr
)>;
def GPR : RegisterClass<"BPF", [i64], 64, (add
(sequence "R%u", 1, 9),
R0, // Return value
R11, // Stack Ptr
R10 // Frame Ptr
)>;
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