1 //===-- AMDGPUAsmPrinter.cpp - AMDGPU Assebly printer --------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
12 /// The AMDGPUAsmPrinter is used to print both assembly string and also binary
13 /// code. When passed an MCAsmStreamer it prints assembly and when passed
14 /// an MCObjectStreamer it outputs binary code.
16 //===----------------------------------------------------------------------===//
19 #include "AMDGPUAsmPrinter.h"
20 #include "AMDGPUTargetMachine.h"
21 #include "MCTargetDesc/AMDGPUTargetStreamer.h"
22 #include "InstPrinter/AMDGPUInstPrinter.h"
23 #include "Utils/AMDGPUBaseInfo.h"
25 #include "AMDGPUSubtarget.h"
26 #include "R600Defines.h"
27 #include "R600MachineFunctionInfo.h"
28 #include "R600RegisterInfo.h"
29 #include "SIDefines.h"
30 #include "SIMachineFunctionInfo.h"
31 #include "SIInstrInfo.h"
32 #include "SIRegisterInfo.h"
33 #include "llvm/CodeGen/MachineFrameInfo.h"
34 #include "llvm/IR/DiagnosticInfo.h"
35 #include "llvm/MC/MCContext.h"
36 #include "llvm/MC/MCSectionELF.h"
37 #include "llvm/MC/MCStreamer.h"
38 #include "llvm/Support/ELF.h"
39 #include "llvm/Support/MathExtras.h"
40 #include "llvm/Support/TargetRegistry.h"
41 #include "llvm/Target/TargetLoweringObjectFile.h"
45 // TODO: This should get the default rounding mode from the kernel. We just set
46 // the default here, but this could change if the OpenCL rounding mode pragmas
49 // The denormal mode here should match what is reported by the OpenCL runtime
50 // for the CL_FP_DENORM bit from CL_DEVICE_{HALF|SINGLE|DOUBLE}_FP_CONFIG, but
51 // can also be override to flush with the -cl-denorms-are-zero compiler flag.
53 // AMD OpenCL only sets flush none and reports CL_FP_DENORM for double
54 // precision, and leaves single precision to flush all and does not report
55 // CL_FP_DENORM for CL_DEVICE_SINGLE_FP_CONFIG. Mesa's OpenCL currently reports
56 // CL_FP_DENORM for both.
58 // FIXME: It seems some instructions do not support single precision denormals
59 // regardless of the mode (exp_*_f32, rcp_*_f32, rsq_*_f32, rsq_*f32, sqrt_f32,
60 // and sin_f32, cos_f32 on most parts).
62 // We want to use these instructions, and using fp32 denormals also causes
63 // instructions to run at the double precision rate for the device so it's
64 // probably best to just report no single precision denormals.
65 static uint32_t getFPMode(const MachineFunction &F) {
66 const SISubtarget& ST = F.getSubtarget<SISubtarget>();
67 // TODO: Is there any real use for the flush in only / flush out only modes?
69 uint32_t FP32Denormals =
70 ST.hasFP32Denormals() ? FP_DENORM_FLUSH_NONE : FP_DENORM_FLUSH_IN_FLUSH_OUT;
72 uint32_t FP64Denormals =
73 ST.hasFP64Denormals() ? FP_DENORM_FLUSH_NONE : FP_DENORM_FLUSH_IN_FLUSH_OUT;
75 return FP_ROUND_MODE_SP(FP_ROUND_ROUND_TO_NEAREST) |
76 FP_ROUND_MODE_DP(FP_ROUND_ROUND_TO_NEAREST) |
77 FP_DENORM_MODE_SP(FP32Denormals) |
78 FP_DENORM_MODE_DP(FP64Denormals);
82 createAMDGPUAsmPrinterPass(TargetMachine &tm,
83 std::unique_ptr<MCStreamer> &&Streamer) {
84 return new AMDGPUAsmPrinter(tm, std::move(Streamer));
87 extern "C" void LLVMInitializeAMDGPUAsmPrinter() {
88 TargetRegistry::RegisterAsmPrinter(getTheAMDGPUTarget(),
89 createAMDGPUAsmPrinterPass);
90 TargetRegistry::RegisterAsmPrinter(getTheGCNTarget(),
91 createAMDGPUAsmPrinterPass);
94 AMDGPUAsmPrinter::AMDGPUAsmPrinter(TargetMachine &TM,
95 std::unique_ptr<MCStreamer> Streamer)
96 : AsmPrinter(TM, std::move(Streamer)) {
97 AMDGPUASI = static_cast<AMDGPUTargetMachine*>(&TM)->getAMDGPUAS();
100 StringRef AMDGPUAsmPrinter::getPassName() const {
101 return "AMDGPU Assembly Printer";
104 const MCSubtargetInfo* AMDGPUAsmPrinter::getSTI() const {
105 return TM.getMCSubtargetInfo();
108 AMDGPUTargetStreamer& AMDGPUAsmPrinter::getTargetStreamer() const {
109 return static_cast<AMDGPUTargetStreamer&>(*OutStreamer->getTargetStreamer());
112 void AMDGPUAsmPrinter::EmitStartOfAsmFile(Module &M) {
113 if (TM.getTargetTriple().getOS() != Triple::AMDHSA)
116 AMDGPU::IsaInfo::IsaVersion ISA =
117 AMDGPU::IsaInfo::getIsaVersion(getSTI()->getFeatureBits());
119 getTargetStreamer().EmitDirectiveHSACodeObjectVersion(2, 1);
120 getTargetStreamer().EmitDirectiveHSACodeObjectISA(
121 ISA.Major, ISA.Minor, ISA.Stepping, "AMD", "AMDGPU");
122 getTargetStreamer().EmitStartOfCodeObjectMetadata(M);
125 void AMDGPUAsmPrinter::EmitEndOfAsmFile(Module &M) {
126 if (TM.getTargetTriple().getOS() != Triple::AMDHSA)
129 getTargetStreamer().EmitEndOfCodeObjectMetadata();
132 bool AMDGPUAsmPrinter::isBlockOnlyReachableByFallthrough(
133 const MachineBasicBlock *MBB) const {
134 if (!AsmPrinter::isBlockOnlyReachableByFallthrough(MBB))
140 // If this is a block implementing a long branch, an expression relative to
141 // the start of the block is needed. to the start of the block.
142 // XXX - Is there a smarter way to check this?
143 return (MBB->back().getOpcode() != AMDGPU::S_SETPC_B64);
146 void AMDGPUAsmPrinter::EmitFunctionBodyStart() {
147 const AMDGPUSubtarget &STM = MF->getSubtarget<AMDGPUSubtarget>();
148 SIProgramInfo KernelInfo;
149 amd_kernel_code_t KernelCode;
150 if (STM.isAmdCodeObjectV2(*MF)) {
151 getSIProgramInfo(KernelInfo, *MF);
152 getAmdKernelCode(KernelCode, KernelInfo, *MF);
154 OutStreamer->SwitchSection(getObjFileLowering().getTextSection());
155 getTargetStreamer().EmitAMDKernelCodeT(KernelCode);
158 if (TM.getTargetTriple().getOS() != Triple::AMDHSA)
160 getTargetStreamer().EmitKernelCodeObjectMetadata(*MF->getFunction(),
164 void AMDGPUAsmPrinter::EmitFunctionEntryLabel() {
165 const SIMachineFunctionInfo *MFI = MF->getInfo<SIMachineFunctionInfo>();
166 const AMDGPUSubtarget &STM = MF->getSubtarget<AMDGPUSubtarget>();
167 if (MFI->isEntryFunction() && STM.isAmdCodeObjectV2(*MF)) {
168 SmallString<128> SymbolName;
169 getNameWithPrefix(SymbolName, MF->getFunction()),
170 getTargetStreamer().EmitAMDGPUSymbolType(
171 SymbolName, ELF::STT_AMDGPU_HSA_KERNEL);
174 AsmPrinter::EmitFunctionEntryLabel();
177 void AMDGPUAsmPrinter::EmitGlobalVariable(const GlobalVariable *GV) {
179 // Group segment variables aren't emitted in HSA.
180 if (AMDGPU::isGroupSegment(GV, AMDGPUASI))
183 AsmPrinter::EmitGlobalVariable(GV);
186 bool AMDGPUAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
188 // The starting address of all shader programs must be 256 bytes aligned.
191 SetupMachineFunction(MF);
193 const AMDGPUSubtarget &STM = MF.getSubtarget<AMDGPUSubtarget>();
194 MCContext &Context = getObjFileLowering().getContext();
195 if (!STM.isAmdHsaOS()) {
196 MCSectionELF *ConfigSection =
197 Context.getELFSection(".AMDGPU.config", ELF::SHT_PROGBITS, 0);
198 OutStreamer->SwitchSection(ConfigSection);
201 SIProgramInfo KernelInfo;
202 if (STM.getGeneration() >= AMDGPUSubtarget::SOUTHERN_ISLANDS) {
203 getSIProgramInfo(KernelInfo, MF);
204 if (!STM.isAmdHsaOS()) {
205 EmitProgramInfoSI(MF, KernelInfo);
208 EmitProgramInfoR600(MF);
213 DisasmLineMaxLen = 0;
218 MCSectionELF *CommentSection =
219 Context.getELFSection(".AMDGPU.csdata", ELF::SHT_PROGBITS, 0);
220 OutStreamer->SwitchSection(CommentSection);
222 if (STM.getGeneration() >= AMDGPUSubtarget::SOUTHERN_ISLANDS) {
223 OutStreamer->emitRawComment(" Kernel info:", false);
224 OutStreamer->emitRawComment(" codeLenInByte = " + Twine(KernelInfo.CodeLen),
226 OutStreamer->emitRawComment(" NumSgprs: " + Twine(KernelInfo.NumSGPR),
228 OutStreamer->emitRawComment(" NumVgprs: " + Twine(KernelInfo.NumVGPR),
230 OutStreamer->emitRawComment(" FloatMode: " + Twine(KernelInfo.FloatMode),
232 OutStreamer->emitRawComment(" IeeeMode: " + Twine(KernelInfo.IEEEMode),
234 OutStreamer->emitRawComment(" ScratchSize: " + Twine(KernelInfo.ScratchSize),
236 OutStreamer->emitRawComment(" LDSByteSize: " + Twine(KernelInfo.LDSSize) +
237 " bytes/workgroup (compile time only)", false);
239 OutStreamer->emitRawComment(" SGPRBlocks: " +
240 Twine(KernelInfo.SGPRBlocks), false);
241 OutStreamer->emitRawComment(" VGPRBlocks: " +
242 Twine(KernelInfo.VGPRBlocks), false);
244 OutStreamer->emitRawComment(" NumSGPRsForWavesPerEU: " +
245 Twine(KernelInfo.NumSGPRsForWavesPerEU), false);
246 OutStreamer->emitRawComment(" NumVGPRsForWavesPerEU: " +
247 Twine(KernelInfo.NumVGPRsForWavesPerEU), false);
249 OutStreamer->emitRawComment(" ReservedVGPRFirst: " + Twine(KernelInfo.ReservedVGPRFirst),
251 OutStreamer->emitRawComment(" ReservedVGPRCount: " + Twine(KernelInfo.ReservedVGPRCount),
254 if (MF.getSubtarget<SISubtarget>().debuggerEmitPrologue()) {
255 OutStreamer->emitRawComment(" DebuggerWavefrontPrivateSegmentOffsetSGPR: s" +
256 Twine(KernelInfo.DebuggerWavefrontPrivateSegmentOffsetSGPR), false);
257 OutStreamer->emitRawComment(" DebuggerPrivateSegmentBufferSGPR: s" +
258 Twine(KernelInfo.DebuggerPrivateSegmentBufferSGPR), false);
261 OutStreamer->emitRawComment(" COMPUTE_PGM_RSRC2:USER_SGPR: " +
262 Twine(G_00B84C_USER_SGPR(KernelInfo.ComputePGMRSrc2)),
264 OutStreamer->emitRawComment(" COMPUTE_PGM_RSRC2:TRAP_HANDLER: " +
265 Twine(G_00B84C_TRAP_HANDLER(KernelInfo.ComputePGMRSrc2)),
267 OutStreamer->emitRawComment(" COMPUTE_PGM_RSRC2:TGID_X_EN: " +
268 Twine(G_00B84C_TGID_X_EN(KernelInfo.ComputePGMRSrc2)),
270 OutStreamer->emitRawComment(" COMPUTE_PGM_RSRC2:TGID_Y_EN: " +
271 Twine(G_00B84C_TGID_Y_EN(KernelInfo.ComputePGMRSrc2)),
273 OutStreamer->emitRawComment(" COMPUTE_PGM_RSRC2:TGID_Z_EN: " +
274 Twine(G_00B84C_TGID_Z_EN(KernelInfo.ComputePGMRSrc2)),
276 OutStreamer->emitRawComment(" COMPUTE_PGM_RSRC2:TIDIG_COMP_CNT: " +
277 Twine(G_00B84C_TIDIG_COMP_CNT(KernelInfo.ComputePGMRSrc2)),
281 R600MachineFunctionInfo *MFI = MF.getInfo<R600MachineFunctionInfo>();
282 OutStreamer->emitRawComment(
283 Twine("SQ_PGM_RESOURCES:STACK_SIZE = " + Twine(MFI->CFStackSize)));
287 if (STM.dumpCode()) {
289 OutStreamer->SwitchSection(
290 Context.getELFSection(".AMDGPU.disasm", ELF::SHT_NOTE, 0));
292 for (size_t i = 0; i < DisasmLines.size(); ++i) {
293 std::string Comment(DisasmLineMaxLen - DisasmLines[i].size(), ' ');
294 Comment += " ; " + HexLines[i] + "\n";
296 OutStreamer->EmitBytes(StringRef(DisasmLines[i]));
297 OutStreamer->EmitBytes(StringRef(Comment));
304 void AMDGPUAsmPrinter::EmitProgramInfoR600(const MachineFunction &MF) {
306 bool killPixel = false;
307 const R600Subtarget &STM = MF.getSubtarget<R600Subtarget>();
308 const R600RegisterInfo *RI = STM.getRegisterInfo();
309 const R600MachineFunctionInfo *MFI = MF.getInfo<R600MachineFunctionInfo>();
311 for (const MachineBasicBlock &MBB : MF) {
312 for (const MachineInstr &MI : MBB) {
313 if (MI.getOpcode() == AMDGPU::KILLGT)
315 unsigned numOperands = MI.getNumOperands();
316 for (unsigned op_idx = 0; op_idx < numOperands; op_idx++) {
317 const MachineOperand &MO = MI.getOperand(op_idx);
320 unsigned HWReg = RI->getEncodingValue(MO.getReg()) & 0xff;
322 // Register with value > 127 aren't GPR
325 MaxGPR = std::max(MaxGPR, HWReg);
331 if (STM.getGeneration() >= R600Subtarget::EVERGREEN) {
332 // Evergreen / Northern Islands
333 switch (MF.getFunction()->getCallingConv()) {
334 default: LLVM_FALLTHROUGH;
335 case CallingConv::AMDGPU_CS: RsrcReg = R_0288D4_SQ_PGM_RESOURCES_LS; break;
336 case CallingConv::AMDGPU_GS: RsrcReg = R_028878_SQ_PGM_RESOURCES_GS; break;
337 case CallingConv::AMDGPU_PS: RsrcReg = R_028844_SQ_PGM_RESOURCES_PS; break;
338 case CallingConv::AMDGPU_VS: RsrcReg = R_028860_SQ_PGM_RESOURCES_VS; break;
342 switch (MF.getFunction()->getCallingConv()) {
343 default: LLVM_FALLTHROUGH;
344 case CallingConv::AMDGPU_GS: LLVM_FALLTHROUGH;
345 case CallingConv::AMDGPU_CS: LLVM_FALLTHROUGH;
346 case CallingConv::AMDGPU_VS: RsrcReg = R_028868_SQ_PGM_RESOURCES_VS; break;
347 case CallingConv::AMDGPU_PS: RsrcReg = R_028850_SQ_PGM_RESOURCES_PS; break;
351 OutStreamer->EmitIntValue(RsrcReg, 4);
352 OutStreamer->EmitIntValue(S_NUM_GPRS(MaxGPR + 1) |
353 S_STACK_SIZE(MFI->CFStackSize), 4);
354 OutStreamer->EmitIntValue(R_02880C_DB_SHADER_CONTROL, 4);
355 OutStreamer->EmitIntValue(S_02880C_KILL_ENABLE(killPixel), 4);
357 if (AMDGPU::isCompute(MF.getFunction()->getCallingConv())) {
358 OutStreamer->EmitIntValue(R_0288E8_SQ_LDS_ALLOC, 4);
359 OutStreamer->EmitIntValue(alignTo(MFI->getLDSSize(), 4) >> 2, 4);
363 void AMDGPUAsmPrinter::getSIProgramInfo(SIProgramInfo &ProgInfo,
364 const MachineFunction &MF) const {
365 const SISubtarget &STM = MF.getSubtarget<SISubtarget>();
366 const SIMachineFunctionInfo *MFI = MF.getInfo<SIMachineFunctionInfo>();
367 uint64_t CodeSize = 0;
368 unsigned MaxSGPR = 0;
369 unsigned MaxVGPR = 0;
370 bool VCCUsed = false;
371 bool FlatUsed = false;
372 const SIRegisterInfo *RI = STM.getRegisterInfo();
373 const SIInstrInfo *TII = STM.getInstrInfo();
375 for (const MachineBasicBlock &MBB : MF) {
376 for (const MachineInstr &MI : MBB) {
377 // TODO: CodeSize should account for multiple functions.
379 // TODO: Should we count size of debug info?
380 if (MI.isDebugValue())
384 CodeSize += TII->getInstSizeInBytes(MI);
386 unsigned numOperands = MI.getNumOperands();
387 for (unsigned op_idx = 0; op_idx < numOperands; op_idx++) {
388 const MachineOperand &MO = MI.getOperand(op_idx);
395 unsigned reg = MO.getReg();
398 case AMDGPU::EXEC_LO:
399 case AMDGPU::EXEC_HI:
402 case AMDGPU::SRC_SHARED_BASE:
403 case AMDGPU::SRC_SHARED_LIMIT:
404 case AMDGPU::SRC_PRIVATE_BASE:
405 case AMDGPU::SRC_PRIVATE_LIMIT:
414 case AMDGPU::FLAT_SCR:
415 case AMDGPU::FLAT_SCR_LO:
416 case AMDGPU::FLAT_SCR_HI:
417 // Even if FLAT_SCRATCH is implicitly used, it has no effect if flat
418 // instructions aren't used to access the scratch buffer.
419 if (MFI->hasFlatScratchInit())
429 llvm_unreachable("trap handler registers should not be used");
435 if (AMDGPU::SReg_32RegClass.contains(reg)) {
436 assert(!AMDGPU::TTMP_32RegClass.contains(reg) &&
437 "trap handler registers should not be used");
440 } else if (AMDGPU::VGPR_32RegClass.contains(reg)) {
443 } else if (AMDGPU::SReg_64RegClass.contains(reg)) {
444 assert(!AMDGPU::TTMP_64RegClass.contains(reg) &&
445 "trap handler registers should not be used");
448 } else if (AMDGPU::VReg_64RegClass.contains(reg)) {
451 } else if (AMDGPU::VReg_96RegClass.contains(reg)) {
454 } else if (AMDGPU::SReg_128RegClass.contains(reg)) {
457 } else if (AMDGPU::VReg_128RegClass.contains(reg)) {
460 } else if (AMDGPU::SReg_256RegClass.contains(reg)) {
463 } else if (AMDGPU::VReg_256RegClass.contains(reg)) {
466 } else if (AMDGPU::SReg_512RegClass.contains(reg)) {
469 } else if (AMDGPU::VReg_512RegClass.contains(reg)) {
473 llvm_unreachable("Unknown register class");
475 unsigned hwReg = RI->getEncodingValue(reg) & 0xff;
476 unsigned maxUsed = hwReg + width - 1;
478 MaxSGPR = maxUsed > MaxSGPR ? maxUsed : MaxSGPR;
480 MaxVGPR = maxUsed > MaxVGPR ? maxUsed : MaxVGPR;
486 unsigned ExtraSGPRs = 0;
491 if (STM.getGeneration() < SISubtarget::VOLCANIC_ISLANDS) {
495 if (STM.isXNACKEnabled())
502 unsigned ExtraVGPRs = STM.getReservedNumVGPRs(MF);
504 // Check the addressable register limit before we add ExtraSGPRs.
505 if (STM.getGeneration() >= AMDGPUSubtarget::VOLCANIC_ISLANDS &&
506 !STM.hasSGPRInitBug()) {
507 unsigned MaxAddressableNumSGPRs = STM.getAddressableNumSGPRs();
508 if (MaxSGPR + 1 > MaxAddressableNumSGPRs) {
509 // This can happen due to a compiler bug or when using inline asm.
510 LLVMContext &Ctx = MF.getFunction()->getContext();
511 DiagnosticInfoResourceLimit Diag(*MF.getFunction(),
512 "addressable scalar registers",
513 MaxSGPR + 1, DS_Error,
515 MaxAddressableNumSGPRs);
517 MaxSGPR = MaxAddressableNumSGPRs - 1;
521 // Account for extra SGPRs and VGPRs reserved for debugger use.
522 MaxSGPR += ExtraSGPRs;
523 MaxVGPR += ExtraVGPRs;
525 // We found the maximum register index. They start at 0, so add one to get the
526 // number of registers.
527 ProgInfo.NumSGPR = MaxSGPR + 1;
528 ProgInfo.NumVGPR = MaxVGPR + 1;
530 // Adjust number of registers used to meet default/requested minimum/maximum
531 // number of waves per execution unit request.
532 ProgInfo.NumSGPRsForWavesPerEU = std::max(
533 ProgInfo.NumSGPR, STM.getMinNumSGPRs(MFI->getMaxWavesPerEU()));
534 ProgInfo.NumVGPRsForWavesPerEU = std::max(
535 ProgInfo.NumVGPR, STM.getMinNumVGPRs(MFI->getMaxWavesPerEU()));
537 if (STM.getGeneration() <= AMDGPUSubtarget::SEA_ISLANDS ||
538 STM.hasSGPRInitBug()) {
539 unsigned MaxAddressableNumSGPRs = STM.getAddressableNumSGPRs();
540 if (ProgInfo.NumSGPR > MaxAddressableNumSGPRs) {
541 // This can happen due to a compiler bug or when using inline asm to use
542 // the registers which are usually reserved for vcc etc.
543 LLVMContext &Ctx = MF.getFunction()->getContext();
544 DiagnosticInfoResourceLimit Diag(*MF.getFunction(),
546 ProgInfo.NumSGPR, DS_Error,
548 MaxAddressableNumSGPRs);
550 ProgInfo.NumSGPR = MaxAddressableNumSGPRs;
551 ProgInfo.NumSGPRsForWavesPerEU = MaxAddressableNumSGPRs;
555 if (STM.hasSGPRInitBug()) {
557 AMDGPU::IsaInfo::FIXED_NUM_SGPRS_FOR_INIT_BUG;
558 ProgInfo.NumSGPRsForWavesPerEU =
559 AMDGPU::IsaInfo::FIXED_NUM_SGPRS_FOR_INIT_BUG;
562 if (MFI->NumUserSGPRs > STM.getMaxNumUserSGPRs()) {
563 LLVMContext &Ctx = MF.getFunction()->getContext();
564 DiagnosticInfoResourceLimit Diag(*MF.getFunction(), "user SGPRs",
565 MFI->NumUserSGPRs, DS_Error);
569 if (MFI->getLDSSize() > static_cast<unsigned>(STM.getLocalMemorySize())) {
570 LLVMContext &Ctx = MF.getFunction()->getContext();
571 DiagnosticInfoResourceLimit Diag(*MF.getFunction(), "local memory",
572 MFI->getLDSSize(), DS_Error);
576 // SGPRBlocks is actual number of SGPR blocks minus 1.
577 ProgInfo.SGPRBlocks = alignTo(ProgInfo.NumSGPRsForWavesPerEU,
578 STM.getSGPREncodingGranule());
579 ProgInfo.SGPRBlocks = ProgInfo.SGPRBlocks / STM.getSGPREncodingGranule() - 1;
581 // VGPRBlocks is actual number of VGPR blocks minus 1.
582 ProgInfo.VGPRBlocks = alignTo(ProgInfo.NumVGPRsForWavesPerEU,
583 STM.getVGPREncodingGranule());
584 ProgInfo.VGPRBlocks = ProgInfo.VGPRBlocks / STM.getVGPREncodingGranule() - 1;
586 // Record first reserved VGPR and number of reserved VGPRs.
587 ProgInfo.ReservedVGPRFirst = STM.debuggerReserveRegs() ? MaxVGPR + 1 : 0;
588 ProgInfo.ReservedVGPRCount = STM.getReservedNumVGPRs(MF);
590 // Update DebuggerWavefrontPrivateSegmentOffsetSGPR and
591 // DebuggerPrivateSegmentBufferSGPR fields if "amdgpu-debugger-emit-prologue"
592 // attribute was requested.
593 if (STM.debuggerEmitPrologue()) {
594 ProgInfo.DebuggerWavefrontPrivateSegmentOffsetSGPR =
595 RI->getHWRegIndex(MFI->getScratchWaveOffsetReg());
596 ProgInfo.DebuggerPrivateSegmentBufferSGPR =
597 RI->getHWRegIndex(MFI->getScratchRSrcReg());
600 // Set the value to initialize FP_ROUND and FP_DENORM parts of the mode
602 ProgInfo.FloatMode = getFPMode(MF);
604 ProgInfo.IEEEMode = STM.enableIEEEBit(MF);
606 // Make clamp modifier on NaN input returns 0.
607 ProgInfo.DX10Clamp = STM.enableDX10Clamp();
609 const MachineFrameInfo &FrameInfo = MF.getFrameInfo();
610 ProgInfo.ScratchSize = FrameInfo.getStackSize();
612 ProgInfo.FlatUsed = FlatUsed;
613 ProgInfo.VCCUsed = VCCUsed;
614 ProgInfo.CodeLen = CodeSize;
616 unsigned LDSAlignShift;
617 if (STM.getGeneration() < SISubtarget::SEA_ISLANDS) {
618 // LDS is allocated in 64 dword blocks.
621 // LDS is allocated in 128 dword blocks.
625 unsigned LDSSpillSize =
626 MFI->LDSWaveSpillSize * MFI->getMaxFlatWorkGroupSize();
628 ProgInfo.LDSSize = MFI->getLDSSize() + LDSSpillSize;
630 alignTo(ProgInfo.LDSSize, 1ULL << LDSAlignShift) >> LDSAlignShift;
632 // Scratch is allocated in 256 dword blocks.
633 unsigned ScratchAlignShift = 10;
634 // We need to program the hardware with the amount of scratch memory that
635 // is used by the entire wave. ProgInfo.ScratchSize is the amount of
636 // scratch memory used per thread.
637 ProgInfo.ScratchBlocks =
638 alignTo(ProgInfo.ScratchSize * STM.getWavefrontSize(),
639 1ULL << ScratchAlignShift) >>
642 ProgInfo.ComputePGMRSrc1 =
643 S_00B848_VGPRS(ProgInfo.VGPRBlocks) |
644 S_00B848_SGPRS(ProgInfo.SGPRBlocks) |
645 S_00B848_PRIORITY(ProgInfo.Priority) |
646 S_00B848_FLOAT_MODE(ProgInfo.FloatMode) |
647 S_00B848_PRIV(ProgInfo.Priv) |
648 S_00B848_DX10_CLAMP(ProgInfo.DX10Clamp) |
649 S_00B848_DEBUG_MODE(ProgInfo.DebugMode) |
650 S_00B848_IEEE_MODE(ProgInfo.IEEEMode);
652 // 0 = X, 1 = XY, 2 = XYZ
653 unsigned TIDIGCompCnt = 0;
654 if (MFI->hasWorkItemIDZ())
656 else if (MFI->hasWorkItemIDY())
659 ProgInfo.ComputePGMRSrc2 =
660 S_00B84C_SCRATCH_EN(ProgInfo.ScratchBlocks > 0) |
661 S_00B84C_USER_SGPR(MFI->getNumUserSGPRs()) |
662 S_00B84C_TRAP_HANDLER(STM.isTrapHandlerEnabled()) |
663 S_00B84C_TGID_X_EN(MFI->hasWorkGroupIDX()) |
664 S_00B84C_TGID_Y_EN(MFI->hasWorkGroupIDY()) |
665 S_00B84C_TGID_Z_EN(MFI->hasWorkGroupIDZ()) |
666 S_00B84C_TG_SIZE_EN(MFI->hasWorkGroupInfo()) |
667 S_00B84C_TIDIG_COMP_CNT(TIDIGCompCnt) |
668 S_00B84C_EXCP_EN_MSB(0) |
669 S_00B84C_LDS_SIZE(ProgInfo.LDSBlocks) |
673 static unsigned getRsrcReg(CallingConv::ID CallConv) {
675 default: LLVM_FALLTHROUGH;
676 case CallingConv::AMDGPU_CS: return R_00B848_COMPUTE_PGM_RSRC1;
677 case CallingConv::AMDGPU_GS: return R_00B228_SPI_SHADER_PGM_RSRC1_GS;
678 case CallingConv::AMDGPU_PS: return R_00B028_SPI_SHADER_PGM_RSRC1_PS;
679 case CallingConv::AMDGPU_VS: return R_00B128_SPI_SHADER_PGM_RSRC1_VS;
683 void AMDGPUAsmPrinter::EmitProgramInfoSI(const MachineFunction &MF,
684 const SIProgramInfo &KernelInfo) {
685 const SISubtarget &STM = MF.getSubtarget<SISubtarget>();
686 const SIMachineFunctionInfo *MFI = MF.getInfo<SIMachineFunctionInfo>();
687 unsigned RsrcReg = getRsrcReg(MF.getFunction()->getCallingConv());
689 if (AMDGPU::isCompute(MF.getFunction()->getCallingConv())) {
690 OutStreamer->EmitIntValue(R_00B848_COMPUTE_PGM_RSRC1, 4);
692 OutStreamer->EmitIntValue(KernelInfo.ComputePGMRSrc1, 4);
694 OutStreamer->EmitIntValue(R_00B84C_COMPUTE_PGM_RSRC2, 4);
695 OutStreamer->EmitIntValue(KernelInfo.ComputePGMRSrc2, 4);
697 OutStreamer->EmitIntValue(R_00B860_COMPUTE_TMPRING_SIZE, 4);
698 OutStreamer->EmitIntValue(S_00B860_WAVESIZE(KernelInfo.ScratchBlocks), 4);
700 // TODO: Should probably note flat usage somewhere. SC emits a "FlatPtr32 =
701 // 0" comment but I don't see a corresponding field in the register spec.
703 OutStreamer->EmitIntValue(RsrcReg, 4);
704 OutStreamer->EmitIntValue(S_00B028_VGPRS(KernelInfo.VGPRBlocks) |
705 S_00B028_SGPRS(KernelInfo.SGPRBlocks), 4);
706 if (STM.isVGPRSpillingEnabled(*MF.getFunction())) {
707 OutStreamer->EmitIntValue(R_0286E8_SPI_TMPRING_SIZE, 4);
708 OutStreamer->EmitIntValue(S_0286E8_WAVESIZE(KernelInfo.ScratchBlocks), 4);
712 if (MF.getFunction()->getCallingConv() == CallingConv::AMDGPU_PS) {
713 OutStreamer->EmitIntValue(R_00B02C_SPI_SHADER_PGM_RSRC2_PS, 4);
714 OutStreamer->EmitIntValue(S_00B02C_EXTRA_LDS_SIZE(KernelInfo.LDSBlocks), 4);
715 OutStreamer->EmitIntValue(R_0286CC_SPI_PS_INPUT_ENA, 4);
716 OutStreamer->EmitIntValue(MFI->getPSInputEnable(), 4);
717 OutStreamer->EmitIntValue(R_0286D0_SPI_PS_INPUT_ADDR, 4);
718 OutStreamer->EmitIntValue(MFI->getPSInputAddr(), 4);
721 OutStreamer->EmitIntValue(R_SPILLED_SGPRS, 4);
722 OutStreamer->EmitIntValue(MFI->getNumSpilledSGPRs(), 4);
723 OutStreamer->EmitIntValue(R_SPILLED_VGPRS, 4);
724 OutStreamer->EmitIntValue(MFI->getNumSpilledVGPRs(), 4);
727 // This is supposed to be log2(Size)
728 static amd_element_byte_size_t getElementByteSizeValue(unsigned Size) {
731 return AMD_ELEMENT_4_BYTES;
733 return AMD_ELEMENT_8_BYTES;
735 return AMD_ELEMENT_16_BYTES;
737 llvm_unreachable("invalid private_element_size");
741 void AMDGPUAsmPrinter::getAmdKernelCode(amd_kernel_code_t &Out,
742 const SIProgramInfo &KernelInfo,
743 const MachineFunction &MF) const {
744 const SIMachineFunctionInfo *MFI = MF.getInfo<SIMachineFunctionInfo>();
745 const SISubtarget &STM = MF.getSubtarget<SISubtarget>();
747 AMDGPU::initDefaultAMDKernelCodeT(Out, STM.getFeatureBits());
749 Out.compute_pgm_resource_registers =
750 KernelInfo.ComputePGMRSrc1 |
751 (KernelInfo.ComputePGMRSrc2 << 32);
752 Out.code_properties = AMD_CODE_PROPERTY_IS_PTR64;
754 AMD_HSA_BITS_SET(Out.code_properties,
755 AMD_CODE_PROPERTY_PRIVATE_ELEMENT_SIZE,
756 getElementByteSizeValue(STM.getMaxPrivateElementSize()));
758 if (MFI->hasPrivateSegmentBuffer()) {
759 Out.code_properties |=
760 AMD_CODE_PROPERTY_ENABLE_SGPR_PRIVATE_SEGMENT_BUFFER;
763 if (MFI->hasDispatchPtr())
764 Out.code_properties |= AMD_CODE_PROPERTY_ENABLE_SGPR_DISPATCH_PTR;
766 if (MFI->hasQueuePtr())
767 Out.code_properties |= AMD_CODE_PROPERTY_ENABLE_SGPR_QUEUE_PTR;
769 if (MFI->hasKernargSegmentPtr())
770 Out.code_properties |= AMD_CODE_PROPERTY_ENABLE_SGPR_KERNARG_SEGMENT_PTR;
772 if (MFI->hasDispatchID())
773 Out.code_properties |= AMD_CODE_PROPERTY_ENABLE_SGPR_DISPATCH_ID;
775 if (MFI->hasFlatScratchInit())
776 Out.code_properties |= AMD_CODE_PROPERTY_ENABLE_SGPR_FLAT_SCRATCH_INIT;
778 if (MFI->hasGridWorkgroupCountX()) {
779 Out.code_properties |=
780 AMD_CODE_PROPERTY_ENABLE_SGPR_GRID_WORKGROUP_COUNT_X;
783 if (MFI->hasGridWorkgroupCountY()) {
784 Out.code_properties |=
785 AMD_CODE_PROPERTY_ENABLE_SGPR_GRID_WORKGROUP_COUNT_Y;
788 if (MFI->hasGridWorkgroupCountZ()) {
789 Out.code_properties |=
790 AMD_CODE_PROPERTY_ENABLE_SGPR_GRID_WORKGROUP_COUNT_Z;
793 if (MFI->hasDispatchPtr())
794 Out.code_properties |= AMD_CODE_PROPERTY_ENABLE_SGPR_DISPATCH_PTR;
796 if (STM.debuggerSupported())
797 Out.code_properties |= AMD_CODE_PROPERTY_IS_DEBUG_SUPPORTED;
799 if (STM.isXNACKEnabled())
800 Out.code_properties |= AMD_CODE_PROPERTY_IS_XNACK_SUPPORTED;
802 // FIXME: Should use getKernArgSize
803 Out.kernarg_segment_byte_size =
804 STM.getKernArgSegmentSize(MF, MFI->getABIArgOffset());
805 Out.wavefront_sgpr_count = KernelInfo.NumSGPR;
806 Out.workitem_vgpr_count = KernelInfo.NumVGPR;
807 Out.workitem_private_segment_byte_size = KernelInfo.ScratchSize;
808 Out.workgroup_group_segment_byte_size = KernelInfo.LDSSize;
809 Out.reserved_vgpr_first = KernelInfo.ReservedVGPRFirst;
810 Out.reserved_vgpr_count = KernelInfo.ReservedVGPRCount;
812 // These alignment values are specified in powers of two, so alignment =
813 // 2^n. The minimum alignment is 2^4 = 16.
814 Out.kernarg_segment_alignment = std::max((size_t)4,
815 countTrailingZeros(MFI->getMaxKernArgAlign()));
817 if (STM.debuggerEmitPrologue()) {
818 Out.debug_wavefront_private_segment_offset_sgpr =
819 KernelInfo.DebuggerWavefrontPrivateSegmentOffsetSGPR;
820 Out.debug_private_segment_buffer_sgpr =
821 KernelInfo.DebuggerPrivateSegmentBufferSGPR;
825 bool AMDGPUAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
827 const char *ExtraCode, raw_ostream &O) {
828 if (ExtraCode && ExtraCode[0]) {
829 if (ExtraCode[1] != 0)
830 return true; // Unknown modifier.
832 switch (ExtraCode[0]) {
834 // See if this is a generic print operand
835 return AsmPrinter::PrintAsmOperand(MI, OpNo, AsmVariant, ExtraCode, O);
841 AMDGPUInstPrinter::printRegOperand(MI->getOperand(OpNo).getReg(), O,
842 *TM.getSubtargetImpl(*MF->getFunction())->getRegisterInfo());