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llvm-project/llvm/lib/Target/R600/AMDGPUAsmPrinter.cpp

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//===-- AMDGPUAsmPrinter.cpp - AMDGPU Assebly printer --------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
/// \file
///
/// The AMDGPUAsmPrinter 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 "AMDGPUAsmPrinter.h"
#include "AMDGPU.h"
#include "R600Defines.h"
#include "R600MachineFunctionInfo.h"
#include "R600RegisterInfo.h"
#include "SIDefines.h"
#include "SIMachineFunctionInfo.h"
#include "SIRegisterInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCSectionELF.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/Support/ELF.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/TargetRegistry.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
using namespace llvm;
static AsmPrinter *createAMDGPUAsmPrinterPass(TargetMachine &tm,
MCStreamer &Streamer) {
return new AMDGPUAsmPrinter(tm, Streamer);
}
extern "C" void LLVMInitializeR600AsmPrinter() {
TargetRegistry::RegisterAsmPrinter(TheAMDGPUTarget, createAMDGPUAsmPrinterPass);
}
/// We need to override this function so we can avoid
/// the call to EmitFunctionHeader(), which the MCPureStreamer can't handle.
bool AMDGPUAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
const AMDGPUSubtarget &STM = TM.getSubtarget<AMDGPUSubtarget>();
if (STM.dumpCode()) {
#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
MF.dump();
#endif
}
SetupMachineFunction(MF);
if (OutStreamer.hasRawTextSupport()) {
OutStreamer.EmitRawText("@" + MF.getName() + ":");
}
const MCSectionELF *ConfigSection = getObjFileLowering().getContext()
.getELFSection(".AMDGPU.config",
ELF::SHT_PROGBITS, 0,
SectionKind::getReadOnly());
OutStreamer.SwitchSection(ConfigSection);
if (STM.getGeneration() > AMDGPUSubtarget::NORTHERN_ISLANDS) {
EmitProgramInfoSI(MF);
} else {
EmitProgramInfoR600(MF);
}
OutStreamer.SwitchSection(getObjFileLowering().getTextSection());
EmitFunctionBody();
return false;
}
void AMDGPUAsmPrinter::EmitProgramInfoR600(MachineFunction &MF) {
unsigned MaxGPR = 0;
bool killPixel = false;
const R600RegisterInfo * RI =
static_cast<const R600RegisterInfo*>(TM.getRegisterInfo());
R600MachineFunctionInfo *MFI = MF.getInfo<R600MachineFunctionInfo>();
const AMDGPUSubtarget &STM = TM.getSubtarget<AMDGPUSubtarget>();
for (MachineFunction::iterator BB = MF.begin(), BB_E = MF.end();
BB != BB_E; ++BB) {
MachineBasicBlock &MBB = *BB;
for (MachineBasicBlock::iterator I = MBB.begin(), E = MBB.end();
I != E; ++I) {
MachineInstr &MI = *I;
if (MI.getOpcode() == AMDGPU::KILLGT)
killPixel = true;
unsigned numOperands = MI.getNumOperands();
for (unsigned op_idx = 0; op_idx < numOperands; op_idx++) {
MachineOperand & MO = MI.getOperand(op_idx);
if (!MO.isReg())
continue;
unsigned HWReg = RI->getEncodingValue(MO.getReg()) & 0xff;
// 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 (MFI->ShaderType) {
default: // Fall through
case ShaderType::COMPUTE: RsrcReg = R_0288D4_SQ_PGM_RESOURCES_LS; break;
case ShaderType::GEOMETRY: RsrcReg = R_028878_SQ_PGM_RESOURCES_GS; break;
case ShaderType::PIXEL: RsrcReg = R_028844_SQ_PGM_RESOURCES_PS; break;
case ShaderType::VERTEX: RsrcReg = R_028860_SQ_PGM_RESOURCES_VS; break;
}
} else {
// R600 / R700
switch (MFI->ShaderType) {
default: // Fall through
case ShaderType::GEOMETRY: // Fall through
case ShaderType::COMPUTE: // Fall through
case ShaderType::VERTEX: RsrcReg = R_028868_SQ_PGM_RESOURCES_VS; break;
case ShaderType::PIXEL: RsrcReg = R_028850_SQ_PGM_RESOURCES_PS; break;
}
}
OutStreamer.EmitIntValue(RsrcReg, 4);
OutStreamer.EmitIntValue(S_NUM_GPRS(MaxGPR + 1) |
S_STACK_SIZE(MFI->StackSize), 4);
OutStreamer.EmitIntValue(R_02880C_DB_SHADER_CONTROL, 4);
OutStreamer.EmitIntValue(S_02880C_KILL_ENABLE(killPixel), 4);
if (MFI->ShaderType == ShaderType::COMPUTE) {
OutStreamer.EmitIntValue(R_0288E8_SQ_LDS_ALLOC, 4);
OutStreamer.EmitIntValue(RoundUpToAlignment(MFI->LDSSize, 4) >> 2, 4);
}
}
void AMDGPUAsmPrinter::EmitProgramInfoSI(MachineFunction &MF) {
unsigned MaxSGPR = 0;
unsigned MaxVGPR = 0;
bool VCCUsed = false;
const SIRegisterInfo * RI =
static_cast<const SIRegisterInfo*>(TM.getRegisterInfo());
for (MachineFunction::iterator BB = MF.begin(), BB_E = MF.end();
BB != BB_E; ++BB) {
MachineBasicBlock &MBB = *BB;
for (MachineBasicBlock::iterator I = MBB.begin(), E = MBB.end();
I != E; ++I) {
MachineInstr &MI = *I;
unsigned numOperands = MI.getNumOperands();
for (unsigned op_idx = 0; op_idx < numOperands; op_idx++) {
MachineOperand & MO = MI.getOperand(op_idx);
unsigned maxUsed;
unsigned width = 0;
bool isSGPR = false;
unsigned reg;
unsigned hwReg;
if (!MO.isReg()) {
continue;
}
reg = MO.getReg();
if (reg == AMDGPU::VCC) {
VCCUsed = true;
continue;
}
switch (reg) {
default: break;
case AMDGPU::EXEC:
case AMDGPU::M0:
continue;
}
if (AMDGPU::SReg_32RegClass.contains(reg)) {
isSGPR = true;
width = 1;
} else if (AMDGPU::VReg_32RegClass.contains(reg)) {
isSGPR = false;
width = 1;
} else if (AMDGPU::SReg_64RegClass.contains(reg)) {
isSGPR = true;
width = 2;
} else if (AMDGPU::VReg_64RegClass.contains(reg)) {
isSGPR = false;
width = 2;
} else if (AMDGPU::VReg_96RegClass.contains(reg)) {
isSGPR = false;
width = 3;
} else if (AMDGPU::SReg_128RegClass.contains(reg)) {
isSGPR = true;
width = 4;
} else if (AMDGPU::VReg_128RegClass.contains(reg)) {
isSGPR = false;
width = 4;
} else if (AMDGPU::SReg_256RegClass.contains(reg)) {
isSGPR = true;
width = 8;
} else if (AMDGPU::VReg_256RegClass.contains(reg)) {
isSGPR = false;
width = 8;
} else if (AMDGPU::VReg_512RegClass.contains(reg)) {
isSGPR = false;
width = 16;
} else {
assert(!"Unknown register class");
}
hwReg = RI->getEncodingValue(reg) & 0xff;
maxUsed = hwReg + width - 1;
if (isSGPR) {
MaxSGPR = maxUsed > MaxSGPR ? maxUsed : MaxSGPR;
} else {
MaxVGPR = maxUsed > MaxVGPR ? maxUsed : MaxVGPR;
}
}
}
}
if (VCCUsed) {
MaxSGPR += 2;
}
SIMachineFunctionInfo * MFI = MF.getInfo<SIMachineFunctionInfo>();
unsigned RsrcReg;
switch (MFI->ShaderType) {
default: // Fall through
case ShaderType::COMPUTE: RsrcReg = R_00B848_COMPUTE_PGM_RSRC1; break;
case ShaderType::GEOMETRY: RsrcReg = R_00B228_SPI_SHADER_PGM_RSRC1_GS; break;
case ShaderType::PIXEL: RsrcReg = R_00B028_SPI_SHADER_PGM_RSRC1_PS; break;
case ShaderType::VERTEX: RsrcReg = R_00B128_SPI_SHADER_PGM_RSRC1_VS; break;
}
OutStreamer.EmitIntValue(RsrcReg, 4);
OutStreamer.EmitIntValue(S_00B028_VGPRS(MaxVGPR / 4) | S_00B028_SGPRS(MaxSGPR / 8), 4);
if (MFI->ShaderType == ShaderType::COMPUTE) {
OutStreamer.EmitIntValue(R_00B84C_COMPUTE_PGM_RSRC2, 4);
OutStreamer.EmitIntValue(S_00B84C_LDS_SIZE(RoundUpToAlignment(MFI->LDSSize, 256) >> 8), 4);
}
if (MFI->ShaderType == ShaderType::PIXEL) {
OutStreamer.EmitIntValue(R_00B02C_SPI_SHADER_PGM_RSRC2_PS, 4);
OutStreamer.EmitIntValue(S_00B02C_EXTRA_LDS_SIZE(RoundUpToAlignment(MFI->LDSSize, 256) >> 8), 4);
OutStreamer.EmitIntValue(R_0286CC_SPI_PS_INPUT_ENA, 4);
OutStreamer.EmitIntValue(MFI->PSInputAddr, 4);
}
}
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