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//===-- R600AsmPrinter.cpp - R600 Assembly printer ------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
/// \file
///
/// The R600AsmPrinter is used to print both assembly string and also binary
/// code. When passed an MCAsmStreamer it prints assembly and when passed
/// an MCObjectStreamer it outputs binary code.
//
//===----------------------------------------------------------------------===//
#include "R600AsmPrinter.h"
#include "MCTargetDesc/R600MCTargetDesc.h"
#include "R600Defines.h"
#include "R600MachineFunctionInfo.h"
#include "R600Subtarget.h"
#include "llvm/BinaryFormat/ELF.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCSectionELF.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
using namespace llvm;
AsmPrinter *
llvm::createR600AsmPrinterPass(TargetMachine &TM,
std::unique_ptr<MCStreamer> &&Streamer) {
return new R600AsmPrinter(TM, std::move(Streamer));
}
R600AsmPrinter::R600AsmPrinter(TargetMachine &TM,
std::unique_ptr<MCStreamer> Streamer)
: AsmPrinter(TM, std::move(Streamer)) { }
StringRef R600AsmPrinter::getPassName() const {
return "R600 Assembly Printer";
}
void R600AsmPrinter::EmitProgramInfoR600(const MachineFunction &MF) {
unsigned MaxGPR = 0;
bool killPixel = false;
const R600Subtarget &STM = MF.getSubtarget<R600Subtarget>();
const R600RegisterInfo *RI = STM.getRegisterInfo();
const R600MachineFunctionInfo *MFI = MF.getInfo<R600MachineFunctionInfo>();
for (const MachineBasicBlock &MBB : MF) {
for (const MachineInstr &MI : MBB) {
if (MI.getOpcode() == R600::KILLGT)
killPixel = true;
unsigned numOperands = MI.getNumOperands();
for (unsigned op_idx = 0; op_idx < numOperands; op_idx++) {
const MachineOperand &MO = MI.getOperand(op_idx);
if (!MO.isReg())
continue;
unsigned HWReg = RI->getHWRegIndex(MO.getReg());
// Register with value > 127 aren't GPR
if (HWReg > 127)
continue;
MaxGPR = std::max(MaxGPR, HWReg);
}
}
}
unsigned RsrcReg;
if (STM.getGeneration() >= AMDGPUSubtarget::EVERGREEN) {
// Evergreen / Northern Islands
switch (MF.getFunction().getCallingConv()) {
default: [[fallthrough]];
case CallingConv::AMDGPU_CS: RsrcReg = R_0288D4_SQ_PGM_RESOURCES_LS; break;
case CallingConv::AMDGPU_GS: RsrcReg = R_028878_SQ_PGM_RESOURCES_GS; break;
case CallingConv::AMDGPU_PS: RsrcReg = R_028844_SQ_PGM_RESOURCES_PS; break;
case CallingConv::AMDGPU_VS: RsrcReg = R_028860_SQ_PGM_RESOURCES_VS; break;
}
} else {
// R600 / R700
switch (MF.getFunction().getCallingConv()) {
default: [[fallthrough]];
case CallingConv::AMDGPU_GS: [[fallthrough]];
case CallingConv::AMDGPU_CS: [[fallthrough]];
case CallingConv::AMDGPU_VS: RsrcReg = R_028868_SQ_PGM_RESOURCES_VS; break;
case CallingConv::AMDGPU_PS: RsrcReg = R_028850_SQ_PGM_RESOURCES_PS; break;
}
}
OutStreamer->emitInt32(RsrcReg);
OutStreamer->emitIntValue(S_NUM_GPRS(MaxGPR + 1) |
S_STACK_SIZE(MFI->CFStackSize), 4);
OutStreamer->emitInt32(R_02880C_DB_SHADER_CONTROL);
OutStreamer->emitInt32(S_02880C_KILL_ENABLE(killPixel));
if (AMDGPU::isCompute(MF.getFunction().getCallingConv())) {
OutStreamer->emitInt32(R_0288E8_SQ_LDS_ALLOC);
OutStreamer->emitIntValue(alignTo(MFI->getLDSSize(), 4) >> 2, 4);
}
}
bool R600AsmPrinter::runOnMachineFunction(MachineFunction &MF) {
// Functions needs to be cacheline (256B) aligned.
MF.ensureAlignment(Align(256));
SetupMachineFunction(MF);
MCContext &Context = getObjFileLowering().getContext();
MCSectionELF *ConfigSection =
Context.getELFSection(".AMDGPU.config", ELF::SHT_PROGBITS, 0);
OutStreamer->switchSection(ConfigSection);
EmitProgramInfoR600(MF);
emitFunctionBody();
if (isVerbose()) {
MCSectionELF *CommentSection =
Context.getELFSection(".AMDGPU.csdata", ELF::SHT_PROGBITS, 0);
OutStreamer->switchSection(CommentSection);
R600MachineFunctionInfo *MFI = MF.getInfo<R600MachineFunctionInfo>();
OutStreamer->emitRawComment(
Twine("SQ_PGM_RESOURCES:STACK_SIZE = " + Twine(MFI->CFStackSize)));
}
return false;
}
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