1*0b57cec5SDimitry Andric //===-- BPFSubtarget.cpp - BPF Subtarget Information ----------------------===// 2*0b57cec5SDimitry Andric // 3*0b57cec5SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*0b57cec5SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 5*0b57cec5SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*0b57cec5SDimitry Andric // 7*0b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 8*0b57cec5SDimitry Andric // 9*0b57cec5SDimitry Andric // This file implements the BPF specific subclass of TargetSubtargetInfo. 10*0b57cec5SDimitry Andric // 11*0b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 12*0b57cec5SDimitry Andric 13*0b57cec5SDimitry Andric #include "BPFSubtarget.h" 14*0b57cec5SDimitry Andric #include "BPF.h" 15*0b57cec5SDimitry Andric #include "llvm/Support/Host.h" 16*0b57cec5SDimitry Andric #include "llvm/Support/TargetRegistry.h" 17*0b57cec5SDimitry Andric 18*0b57cec5SDimitry Andric using namespace llvm; 19*0b57cec5SDimitry Andric 20*0b57cec5SDimitry Andric #define DEBUG_TYPE "bpf-subtarget" 21*0b57cec5SDimitry Andric 22*0b57cec5SDimitry Andric #define GET_SUBTARGETINFO_TARGET_DESC 23*0b57cec5SDimitry Andric #define GET_SUBTARGETINFO_CTOR 24*0b57cec5SDimitry Andric #include "BPFGenSubtargetInfo.inc" 25*0b57cec5SDimitry Andric 26*0b57cec5SDimitry Andric void BPFSubtarget::anchor() {} 27*0b57cec5SDimitry Andric 28*0b57cec5SDimitry Andric BPFSubtarget &BPFSubtarget::initializeSubtargetDependencies(StringRef CPU, 29*0b57cec5SDimitry Andric StringRef FS) { 30*0b57cec5SDimitry Andric initializeEnvironment(); 31*0b57cec5SDimitry Andric initSubtargetFeatures(CPU, FS); 32*0b57cec5SDimitry Andric ParseSubtargetFeatures(CPU, FS); 33*0b57cec5SDimitry Andric return *this; 34*0b57cec5SDimitry Andric } 35*0b57cec5SDimitry Andric 36*0b57cec5SDimitry Andric void BPFSubtarget::initializeEnvironment() { 37*0b57cec5SDimitry Andric HasJmpExt = false; 38*0b57cec5SDimitry Andric HasJmp32 = false; 39*0b57cec5SDimitry Andric HasAlu32 = false; 40*0b57cec5SDimitry Andric UseDwarfRIS = false; 41*0b57cec5SDimitry Andric } 42*0b57cec5SDimitry Andric 43*0b57cec5SDimitry Andric void BPFSubtarget::initSubtargetFeatures(StringRef CPU, StringRef FS) { 44*0b57cec5SDimitry Andric if (CPU == "probe") 45*0b57cec5SDimitry Andric CPU = sys::detail::getHostCPUNameForBPF(); 46*0b57cec5SDimitry Andric if (CPU == "generic" || CPU == "v1") 47*0b57cec5SDimitry Andric return; 48*0b57cec5SDimitry Andric if (CPU == "v2") { 49*0b57cec5SDimitry Andric HasJmpExt = true; 50*0b57cec5SDimitry Andric return; 51*0b57cec5SDimitry Andric } 52*0b57cec5SDimitry Andric if (CPU == "v3") { 53*0b57cec5SDimitry Andric HasJmpExt = true; 54*0b57cec5SDimitry Andric HasJmp32 = true; 55*0b57cec5SDimitry Andric return; 56*0b57cec5SDimitry Andric } 57*0b57cec5SDimitry Andric } 58*0b57cec5SDimitry Andric 59*0b57cec5SDimitry Andric BPFSubtarget::BPFSubtarget(const Triple &TT, const std::string &CPU, 60*0b57cec5SDimitry Andric const std::string &FS, const TargetMachine &TM) 61*0b57cec5SDimitry Andric : BPFGenSubtargetInfo(TT, CPU, FS), InstrInfo(), 62*0b57cec5SDimitry Andric FrameLowering(initializeSubtargetDependencies(CPU, FS)), 63*0b57cec5SDimitry Andric TLInfo(TM, *this) {} 64