[AMDGPU][MC] Added lds support for MUBUF

[dp]

Summary

See bug 28234: https://bugs.llvm.org/show_bug.cgi?id=28234

[arsenm]

Why is a separate instruction needed for this? Do these also need to add the implicit m0 use?

lib/Target/AMDGPU/AsmParser/AMDGPUAsmParser.cpp

63–64

This should go in the same header with the other of these InstrMapping function declarations

[dp]

In D43472#1012369, @arsenm wrote:

Why is a separate instruction needed for this? Do these also need to add the implicit m0 use?

I forgot about m0, thanks for pointing that out!

I thought about adding 'lds' modifier to existing instructions but decided against it for the following reasons:

• lds versions have different semantics and existing patterns are of no use.
• would need a flag in SIInstrFlags to identify MUBUF instructions that support 'lds'. This would be necessary for parser to check if instruction could use 'lds' and 'tfe'. Also note that there are not many free bits left in SIInstrFlags.
• would need to add or correct patterns for instructions that support lds to account for additional modifier.
• would need some validation code in parser to check that 'lds' is supported and consistent with 'tfe'.

Also it is trivial to specify implicit use of m0 for separate instructions. Not sure how to do that conditionally.

It is possible to significantly simplify proposed solution by adding 'lds' modifier to all buffer_load* instructions.
Do you suggest to go that way? Please advise.

lib/Target/AMDGPU/AsmParser/AMDGPUAsmParser.cpp

63–64

I did that in the first implementation. Unfortunately the header - SIInstrInfo.h is not included in AsmParser. It has a lot of MachineInstr stuff that do not belong AsmParser. Should we include all that stuff for the sake of one declaration?

[arsenm]

In D43472#1012573, @dp wrote:

In D43472#1012369, @arsenm wrote:

Why is a separate instruction needed for this? Do these also need to add the implicit m0 use?

I forgot about m0, thanks for pointing that out!

I thought about adding 'lds' modifier to existing instructions but decided against it for the following reasons:

• lds versions have different semantics and existing patterns are of no use.
• would need a flag in SIInstrFlags to identify MUBUF instructions that support 'lds'. This would be necessary for parser to check if instruction could use 'lds' and 'tfe'. Also note that there are not many free bits left in SIInstrFlags.
• would need to add or correct patterns for instructions that support lds to account for additional modifier.
• would need some validation code in parser to check that 'lds' is supported and consistent with 'tfe'.

Also it is trivial to specify implicit use of m0 for separate instructions. Not sure how to do that conditionally.

We do stuff like Uses = !if(Foo, [EXEC], [VCC, EXEC]) other places

It is possible to significantly simplify proposed solution by adding 'lds' modifier to all buffer_load* instructions.
Do you suggest to go that way? Please advise.

I'm not sure. Separate instructions is probably better since it avoids needing to manually deal with the m0 constraint so is probably less error prone.

lib/Target/AMDGPU/AsmParser/AMDGPUAsmParser.cpp

63–64

We have some in AMDGPUBaseInfo.h (e.g. getNamedOperandIdx)

[dp]

Corrected issues found by Matt:

• added implicit use of M0 for lds opcodes;
• moved declaration of getMUBUFNoLdsInst to SIInstrInfo.h

[artem.tamazov]

LGTM. I recommend adding an erratic case with both "lds" and "tfe" to the tests.

[dp]

In D43472#1013066, @artem.tamazov wrote:

LGTM. I recommend adding an erratic case with both "lds" and "tfe" to the tests.

Added:

buffer_load_sbyte v5, off, s[8:11], s3 lds tfe
// NOSICIVI: error: invalid operand for instruction

buffer_load_dword v5, off, s[8:11], s3 tfe lds
// NOSICIVI: error: invalid operand for instruction

[artem.tamazov]

In D43472#1013187, @dp wrote:

In D43472#1013066, @artem.tamazov wrote:

LGTM. I recommend adding an erratic case with both "lds" and "tfe" to the tests.

Added...

Great, thanks!

lib/Target/AMDGPU/AsmParser/AMDGPUAsmParser.cpp

 #include <cassert>
 #include <cstdint>
 #include <cstring>
 #include <iterator>
 #include <map>
 #include <memory>
 #include <string>
 
+namespace llvm {
+namespace AMDGPU {
+  LLVM_READONLY
+  int getMUBUFNoLdsInst(uint16_t Opcode);
+}
+}
+
 using namespace llvm;
 using namespace llvm::AMDGPU;
 
 namespace {
 
 class AMDGPUAsmParser;
 
 enum RegisterKind { IS_UNKNOWN, IS_VGPR, IS_SGPR, IS_TTMP, IS_SPECIAL };
struct Modifiers {
     }
 
     friend raw_ostream &operator <<(raw_ostream &OS, AMDGPUOperand::Modifiers Mods);
   };
 
   enum ImmTy {
     ImmTyNone,
     ImmTyGDS,
+    ImmTyLDS,
     ImmTyOffen,
     ImmTyIdxen,
     ImmTyAddr64,
     ImmTyOffset,
     ImmTyInstOffset,
     ImmTyOffset0,
     ImmTyOffset1,
     ImmTyGLC,
public:
   bool isAddr64() const { return isImmTy(ImmTyAddr64); }
   bool isOffset() const { return isImmTy(ImmTyOffset) && isUInt<16>(getImm()); }
   bool isOffset0() const { return isImmTy(ImmTyOffset0) && isUInt<16>(getImm()); }
   bool isOffset1() const { return isImmTy(ImmTyOffset1) && isUInt<8>(getImm()); }
 
   bool isOffsetU12() const { return (isImmTy(ImmTyOffset) || isImmTy(ImmTyInstOffset)) && isUInt<12>(getImm()); }
   bool isOffsetS13() const { return (isImmTy(ImmTyOffset) || isImmTy(ImmTyInstOffset)) && isInt<13>(getImm()); }
   bool isGDS() const { return isImmTy(ImmTyGDS); }
+  bool isLDS() const { return isImmTy(ImmTyLDS); }
   bool isGLC() const { return isImmTy(ImmTyGLC); }
   bool isSLC() const { return isImmTy(ImmTySLC); }
   bool isTFE() const { return isImmTy(ImmTyTFE); }
   bool isD16() const { return isImmTy(ImmTyD16); }
   bool isDFMT() const { return isImmTy(ImmTyDFMT) && isUInt<8>(getImm()); }
   bool isNFMT() const { return isImmTy(ImmTyNFMT) && isUInt<8>(getImm()); }
   bool isBankMask() const { return isImmTy(ImmTyDppBankMask); }
   bool isRowMask() const { return isImmTy(ImmTyDppRowMask); }
else {
       Inst.addOperand(MCOperand::createExpr(Expr));
     }
   }
 
   static void printImmTy(raw_ostream& OS, ImmTy Type) {
     switch (Type) {
     case ImmTyNone: OS << "None"; break;
     case ImmTyGDS: OS << "GDS"; break;
+    case ImmTyLDS: OS << "LDS"; break;
     case ImmTyOffen: OS << "Offen"; break;
     case ImmTyIdxen: OS << "Idxen"; break;
     case ImmTyAddr64: OS << "Addr64"; break;
     case ImmTyOffset: OS << "Offset"; break;
     case ImmTyInstOffset: OS << "InstOffset"; break;
     case ImmTyOffset0: OS << "Offset0"; break;
     case ImmTyOffset1: OS << "Offset1"; break;
     case ImmTyGLC: OS << "GLC"; break;

 
 AMDGPUOperand::Ptr AMDGPUAsmParser::defaultD16() const {
   return AMDGPUOperand::CreateImm(this, 0, SMLoc(), AMDGPUOperand::ImmTyD16);
 }
 
 void AMDGPUAsmParser::cvtMubufImpl(MCInst &Inst,
                                const OperandVector &Operands,
                                bool IsAtomic, bool IsAtomicReturn) {
+  bool HasLdsModifier = false;
   OptionalImmIndexMap OptionalIdx;
   assert(IsAtomicReturn ? IsAtomic : true);
 
   for (unsigned i = 1, e = Operands.size(); i != e; ++i) {
     AMDGPUOperand &Op = ((AMDGPUOperand &)*Operands[i]);
 
     // Add the register arguments
     if (Op.isReg()) {
       Op.addRegOperands(Inst, 1);
       continue;
     }
 
     // Handle the case where soffset is an immediate
     if (Op.isImm() && Op.getImmTy() == AMDGPUOperand::ImmTyNone) {
       Op.addImmOperands(Inst, 1);
       continue;
     }
 
+    HasLdsModifier = Op.isLDS();
+
     // Handle tokens like 'offen' which are sometimes hard-coded into the
     // asm string.  There are no MCInst operands for these.
     if (Op.isToken()) {
       continue;
     }
     assert(Op.isImm());
 
     // Handle optional arguments
     OptionalIdx[Op.getImmTy()] = i;
   }
 
+  // This is a workaround for an llvm quirk which may result in an
+  // incorrect instruction selection. Lds and non-lds versions of
+  // MUBUF instructions are identical except that lds versions
+  // have mandatory 'lds' modifier. However this modifier follows
+  // optional modifiers and llvm asm matcher regards this 'lds'
+  // modifier as an optional one. As a result, an lds version
+  // of opcode may be selected even if it has no 'lds' modifier.
+  if (!HasLdsModifier) {
+    int NoLdsOpcode = AMDGPU::getMUBUFNoLdsInst(Inst.getOpcode());
+    if (NoLdsOpcode != -1) { // Got lds version - correct it.
+      Inst.setOpcode(NoLdsOpcode);
+    }
+  }
+
   // Copy $vdata_in operand and insert as $vdata for MUBUF_Atomic RTN insns.
   if (IsAtomicReturn) {
     MCInst::iterator I = Inst.begin(); // $vdata_in is always at the beginning.
     Inst.insert(I, *I);
   }
 
   addOptionalImmOperand(Inst, Operands, OptionalIdx, AMDGPUOperand::ImmTyOffset);
   if (!IsAtomic) { // glc is hard-coded.
     addOptionalImmOperand(Inst, Operands, OptionalIdx, AMDGPUOperand::ImmTyGLC);
   }
   addOptionalImmOperand(Inst, Operands, OptionalIdx, AMDGPUOperand::ImmTySLC);
+
+  if (!HasLdsModifier) { // tfe is not legal with lds opcodes
     addOptionalImmOperand(Inst, Operands, OptionalIdx, AMDGPUOperand::ImmTyTFE);
   }
+}
 
 void AMDGPUAsmParser::cvtMtbuf(MCInst &Inst, const OperandVector &Operands) {
   OptionalImmIndexMap OptionalIdx;
 
   for (unsigned i = 1, e = Operands.size(); i != e; ++i) {
     AMDGPUOperand &Op = ((AMDGPUOperand &)*Operands[i]);
 
     // Add the register arguments

 // Note: the order in this table matches the order of operands in AsmString.
 static const OptionalOperand AMDGPUOptionalOperandTable[] = {
   {"offen",   AMDGPUOperand::ImmTyOffen, true, nullptr},
   {"idxen",   AMDGPUOperand::ImmTyIdxen, true, nullptr},
   {"addr64",  AMDGPUOperand::ImmTyAddr64, true, nullptr},
   {"offset0", AMDGPUOperand::ImmTyOffset0, false, nullptr},
   {"offset1", AMDGPUOperand::ImmTyOffset1, false, nullptr},
   {"gds",     AMDGPUOperand::ImmTyGDS, true, nullptr},
+  {"lds",     AMDGPUOperand::ImmTyLDS, true, nullptr},
   {"offset",  AMDGPUOperand::ImmTyOffset, false, nullptr},
   {"inst_offset", AMDGPUOperand::ImmTyInstOffset, false, nullptr},
   {"dfmt",    AMDGPUOperand::ImmTyDFMT, false, nullptr},
   {"nfmt",    AMDGPUOperand::ImmTyNFMT, false, nullptr},
   {"glc",     AMDGPUOperand::ImmTyGLC, true, nullptr},
   {"slc",     AMDGPUOperand::ImmTySLC, true, nullptr},
   {"tfe",     AMDGPUOperand::ImmTyTFE, true, nullptr},
   {"d16",     AMDGPUOperand::ImmTyD16, true, nullptr},
unsigned AMDGPUAsmParser::validateTargetOperandClass(MCParsedAsmOperand &Op,
   // operand. This method checks if we are given immediate operand but expect to
   // get corresponding token.
   AMDGPUOperand &Operand = (AMDGPUOperand&)Op;
   switch (Kind) {
   case MCK_addr64:
     return Operand.isAddr64() ? Match_Success : Match_InvalidOperand;
   case MCK_gds:
     return Operand.isGDS() ? Match_Success : Match_InvalidOperand;
+  case MCK_lds:
+    return Operand.isLDS() ? Match_Success : Match_InvalidOperand;
   case MCK_glc:
     return Operand.isGLC() ? Match_Success : Match_InvalidOperand;
   case MCK_d16:
     return Operand.isD16() ? Match_Success : Match_InvalidOperand;
   case MCK_idxen:
     return Operand.isIdxen() ? Match_Success : Match_InvalidOperand;
   case MCK_offen:
     return Operand.isOffen() ? Match_Success : Match_InvalidOperand;

lib/Target/AMDGPU/BUFInstructions.td

string ret =
     "")))));
 }
 
 class MUBUFAddr64Table <bit is_addr64, string suffix = ""> {
   bit IsAddr64 = is_addr64;
   string OpName = NAME # suffix;
 }
 
+class MUBUFLdsTable <bit is_lds, string suffix> {
+  bit IsLds = is_lds;
+  string OpName = NAME # suffix;
+}
+
 class MTBUFAddr64Table <bit is_addr64, string suffix = ""> {
   bit IsAddr64 = is_addr64;
   string OpName = NAME # suffix;
 }
 
 //===----------------------------------------------------------------------===//
 // MTBUF classes
 //===----------------------------------------------------------------------===//
class MUBUF_Pseudo <string opName, dag outs, dag ins,
   let hasSideEffects = 0;
   let SchedRW = [WriteVMEM];
 
   let AsmMatchConverter = "cvtMubuf";
 
   bits<1> offen       = 0;
   bits<1> idxen       = 0;
   bits<1> addr64      = 0;
+  bits<1> lds         = 0;
   bits<1> has_vdata   = 1;
   bits<1> has_vaddr   = 1;
   bits<1> has_glc     = 1;
   bits<1> glc_value   = 0; // the value for glc if no such operand
   bits<1> has_srsrc   = 1;
   bits<1> has_soffset = 1;
   bits<1> has_offset  = 1;
   bits<1> has_slc     = 1;
class MUBUF_Real <bits<7> op, MUBUF_Pseudo ps> :
   let SubtargetPredicate = ps.SubtargetPredicate;
   let AsmMatchConverter  = ps.AsmMatchConverter;
   let Constraints        = ps.Constraints;
   let DisableEncoding    = ps.DisableEncoding;
   let TSFlags            = ps.TSFlags;
 
   bits<12> offset;
   bits<1>  glc;
-  bits<1>  lds = 0;
   bits<8>  vaddr;
   bits<8>  vdata;
   bits<7>  srsrc;
   bits<1>  slc;
   bits<1>  tfe;
   bits<8>  soffset;
 }
 
class MUBUF_Invalidate <string opName, SDPatternOperator node> :
   let has_srsrc   = 0;
   let has_soffset = 0;
   let has_offset  = 0;
   let has_slc     = 0;
   let has_tfe     = 0;
 }
 
 class getMUBUFInsDA<list<RegisterClass> vdataList,
-                    list<RegisterClass> vaddrList=[]> {
+                    list<RegisterClass> vaddrList=[],
+                    bit isLds = 0> {
   RegisterClass vdataClass = !if(!empty(vdataList), ?, !head(vdataList));
   RegisterClass vaddrClass = !if(!empty(vaddrList), ?, !head(vaddrList));
   dag InsNoData = !if(!empty(vaddrList),
     (ins                    SReg_128:$srsrc, SCSrc_b32:$soffset,
-         offset:$offset, GLC:$glc, slc:$slc, tfe:$tfe),
+         offset:$offset, GLC:$glc, slc:$slc),
     (ins vaddrClass:$vaddr, SReg_128:$srsrc, SCSrc_b32:$soffset,
-         offset:$offset, GLC:$glc, slc:$slc, tfe:$tfe)
+         offset:$offset, GLC:$glc, slc:$slc)
   );
   dag InsData = !if(!empty(vaddrList),
     (ins vdataClass:$vdata,                    SReg_128:$srsrc,
-         SCSrc_b32:$soffset, offset:$offset, GLC:$glc, slc:$slc, tfe:$tfe),
+         SCSrc_b32:$soffset, offset:$offset, GLC:$glc, slc:$slc),
     (ins vdataClass:$vdata, vaddrClass:$vaddr, SReg_128:$srsrc,
-         SCSrc_b32:$soffset, offset:$offset, GLC:$glc, slc:$slc, tfe:$tfe)
+         SCSrc_b32:$soffset, offset:$offset, GLC:$glc, slc:$slc)
+  );
+  dag ret = !con(
+              !if(!empty(vdataList), InsNoData, InsData),
+              !if(isLds, (ins), (ins tfe:$tfe))
              );
-  dag ret = !if(!empty(vdataList), InsNoData, InsData);
 }
 
-class getMUBUFIns<int addrKind, list<RegisterClass> vdataList=[]> {
+class getMUBUFIns<int addrKind, list<RegisterClass> vdataList=[], bit isLds = 0> {
   dag ret =
-    !if(!eq(addrKind, BUFAddrKind.Offset), getMUBUFInsDA<vdataList>.ret,
-    !if(!eq(addrKind, BUFAddrKind.OffEn),  getMUBUFInsDA<vdataList, [VGPR_32]>.ret,
-    !if(!eq(addrKind, BUFAddrKind.IdxEn),  getMUBUFInsDA<vdataList, [VGPR_32]>.ret,
-    !if(!eq(addrKind, BUFAddrKind.BothEn), getMUBUFInsDA<vdataList, [VReg_64]>.ret,
-    !if(!eq(addrKind, BUFAddrKind.Addr64), getMUBUFInsDA<vdataList, [VReg_64]>.ret,
+    !if(!eq(addrKind, BUFAddrKind.Offset), getMUBUFInsDA<vdataList, [], isLds>.ret,
+    !if(!eq(addrKind, BUFAddrKind.OffEn),  getMUBUFInsDA<vdataList, [VGPR_32], isLds>.ret,
+    !if(!eq(addrKind, BUFAddrKind.IdxEn),  getMUBUFInsDA<vdataList, [VGPR_32], isLds>.ret,
+    !if(!eq(addrKind, BUFAddrKind.BothEn), getMUBUFInsDA<vdataList, [VReg_64], isLds>.ret,
+    !if(!eq(addrKind, BUFAddrKind.Addr64), getMUBUFInsDA<vdataList, [VReg_64], isLds>.ret,
     (ins))))));
 }
 
 class getMUBUFAsmOps<int addrKind> {
   string Pfx =
     !if(!eq(addrKind, BUFAddrKind.Offset), "off, $srsrc, $soffset",
     !if(!eq(addrKind, BUFAddrKind.OffEn),  "$vaddr, $srsrc, $soffset offen",
     !if(!eq(addrKind, BUFAddrKind.IdxEn),  "$vaddr, $srsrc, $soffset idxen",
class MUBUF_SetupAddr<int addrKind> {
 
   bits<1> has_vaddr = !if(!eq(addrKind, BUFAddrKind.Offset), 0, 1);
 }
 
 class MUBUF_Load_Pseudo <string opName,
                          int addrKind,
                          RegisterClass vdataClass,
                          bit HasTiedDest = 0,
+                         bit isLds = 0,
                          list<dag> pattern=[],
                          // Workaround bug bz30254
                          int addrKindCopy = addrKind>
   : MUBUF_Pseudo<opName,
                  (outs vdataClass:$vdata),
-                 !con(getMUBUFIns<addrKindCopy>.ret, !if(HasTiedDest, (ins vdataClass:$vdata_in), (ins))),
-                 " $vdata, " # getMUBUFAsmOps<addrKindCopy>.ret # "$glc$slc$tfe",
+                 !con(getMUBUFIns<addrKindCopy, [], isLds>.ret,
+                      !if(HasTiedDest, (ins vdataClass:$vdata_in), (ins))),
+                 " $vdata, " # getMUBUFAsmOps<addrKindCopy>.ret # "$glc$slc" #
+                   !if(isLds, " lds", "$tfe"),
                  pattern>,
     MUBUF_SetupAddr<addrKindCopy> {
-  let PseudoInstr = opName # "_" # getAddrName<addrKindCopy>.ret;
+  let PseudoInstr = opName # !if(isLds, "_lds", "") #
+                    "_" # getAddrName<addrKindCopy>.ret;
+
   let Constraints = !if(HasTiedDest, "$vdata = $vdata_in", "");
   let mayLoad = 1;
   let mayStore = 0;
   let maybeAtomic = 1;
+  let has_tfe = !if(isLds, 0, 1);
+  let lds = isLds;
 }
 
 // FIXME: tfe can't be an operand because it requires a separate
 // opcode because it needs an N+1 register class dest register.
 multiclass MUBUF_Pseudo_Loads<string opName, RegisterClass vdataClass,
                               ValueType load_vt = i32,
                               SDPatternOperator ld = null_frag,
-                              bit TiedDest = 0> {
+                              bit TiedDest = 0,
+                              bit isLds = 0> {
 
   def _OFFSET : MUBUF_Load_Pseudo <opName, BUFAddrKind.Offset, vdataClass,
-    TiedDest,
+    TiedDest, isLds,
+    !if(isLds,
+        [],
         [(set load_vt:$vdata,
-     (ld (MUBUFOffset v4i32:$srsrc, i32:$soffset, i16:$offset, i1:$glc, i1:$slc, i1:$tfe)))]>,
-    MUBUFAddr64Table<0>;
+         (ld (MUBUFOffset v4i32:$srsrc, i32:$soffset, i16:$offset, i1:$glc, i1:$slc, i1:$tfe)))])>,
+    MUBUFAddr64Table<0, !if(isLds, "_LDS", "")>;
 
   def _ADDR64 : MUBUF_Load_Pseudo <opName, BUFAddrKind.Addr64, vdataClass,
-    TiedDest,
+    TiedDest, isLds,
+    !if(isLds,
+        [],
         [(set load_vt:$vdata,
-     (ld (MUBUFAddr64 v4i32:$srsrc, i64:$vaddr, i32:$soffset, i16:$offset, i1:$glc, i1:$slc, i1:$tfe)))]>,
-    MUBUFAddr64Table<1>;
+         (ld (MUBUFAddr64 v4i32:$srsrc, i64:$vaddr, i32:$soffset, i16:$offset, i1:$glc, i1:$slc, i1:$tfe)))])>,
+    MUBUFAddr64Table<1, !if(isLds, "_LDS", "")>;
 
-  def _OFFEN  : MUBUF_Load_Pseudo <opName, BUFAddrKind.OffEn, vdataClass, TiedDest>;
-  def _IDXEN  : MUBUF_Load_Pseudo <opName, BUFAddrKind.IdxEn, vdataClass, TiedDest>;
-  def _BOTHEN : MUBUF_Load_Pseudo <opName, BUFAddrKind.BothEn, vdataClass, TiedDest>;
+  def _OFFEN  : MUBUF_Load_Pseudo <opName, BUFAddrKind.OffEn, vdataClass, TiedDest, isLds>;
+  def _IDXEN  : MUBUF_Load_Pseudo <opName, BUFAddrKind.IdxEn, vdataClass, TiedDest, isLds>;
+  def _BOTHEN : MUBUF_Load_Pseudo <opName, BUFAddrKind.BothEn, vdataClass, TiedDest, isLds>;
 
   let DisableWQM = 1 in {
-    def _OFFSET_exact : MUBUF_Load_Pseudo <opName, BUFAddrKind.Offset, vdataClass, TiedDest>;
-    def _OFFEN_exact  : MUBUF_Load_Pseudo <opName, BUFAddrKind.OffEn, vdataClass, TiedDest>;
-    def _IDXEN_exact  : MUBUF_Load_Pseudo <opName, BUFAddrKind.IdxEn, vdataClass, TiedDest>;
-    def _BOTHEN_exact : MUBUF_Load_Pseudo <opName, BUFAddrKind.BothEn, vdataClass, TiedDest>;
-  }
+    def _OFFSET_exact : MUBUF_Load_Pseudo <opName, BUFAddrKind.Offset, vdataClass, TiedDest, isLds>;
+    def _OFFEN_exact  : MUBUF_Load_Pseudo <opName, BUFAddrKind.OffEn, vdataClass, TiedDest, isLds>;
+    def _IDXEN_exact  : MUBUF_Load_Pseudo <opName, BUFAddrKind.IdxEn, vdataClass, TiedDest, isLds>;
+    def _BOTHEN_exact : MUBUF_Load_Pseudo <opName, BUFAddrKind.BothEn, vdataClass, TiedDest, isLds>;
+  }
+
+multiclass MUBUF_Pseudo_Loads_Lds<string opName, RegisterClass vdataClass,
+                                  ValueType load_vt = i32,
+                                  SDPatternOperator ld_nolds = null_frag,
+                                  SDPatternOperator ld_lds = null_frag> {
+  defm NAME : MUBUF_Pseudo_Loads<opName, vdataClass, load_vt, ld_nolds>;
+  defm _LDS : MUBUF_Pseudo_Loads<opName, vdataClass, load_vt, ld_lds, 0, 1>;
 }
 
 class MUBUF_Store_Pseudo <string opName,
                           int addrKind,
                           RegisterClass vdataClass,
                           list<dag> pattern=[],
                           // Workaround bug bz30254
                           int addrKindCopy = addrKind,
multiclass MUBUF_Pseudo_Atomics <string opName,
   def _BOTHEN_RTN : MUBUF_AtomicRet_Pseudo <opName, BUFAddrKind.BothEn, vdataClass>;
 }
 
 
 //===----------------------------------------------------------------------===//
 // MUBUF Instructions
 //===----------------------------------------------------------------------===//
 
-defm BUFFER_LOAD_FORMAT_X : MUBUF_Pseudo_Loads <
+defm BUFFER_LOAD_FORMAT_X : MUBUF_Pseudo_Loads_Lds <
   "buffer_load_format_x", VGPR_32
 >;
 defm BUFFER_LOAD_FORMAT_XY : MUBUF_Pseudo_Loads <
   "buffer_load_format_xy", VReg_64
 >;
 defm BUFFER_LOAD_FORMAT_XYZ : MUBUF_Pseudo_Loads <
   "buffer_load_format_xyz", VReg_96
 >;
let SubtargetPredicate = HasPackedD16VMem, D16 = 1 in {
   defm BUFFER_STORE_FORMAT_D16_XYZ : MUBUF_Pseudo_Stores <
     "buffer_store_format_d16_xyz", VReg_64
   >;
   defm BUFFER_STORE_FORMAT_D16_XYZW : MUBUF_Pseudo_Stores <
     "buffer_store_format_d16_xyzw", VReg_64
   >;
 } // End HasPackedD16VMem.
 
-defm BUFFER_LOAD_UBYTE : MUBUF_Pseudo_Loads <
+defm BUFFER_LOAD_UBYTE : MUBUF_Pseudo_Loads_Lds <
   "buffer_load_ubyte", VGPR_32, i32, mubuf_az_extloadi8
 >;
-defm BUFFER_LOAD_SBYTE : MUBUF_Pseudo_Loads <
+defm BUFFER_LOAD_SBYTE : MUBUF_Pseudo_Loads_Lds <
   "buffer_load_sbyte", VGPR_32, i32, mubuf_sextloadi8
 >;
-defm BUFFER_LOAD_USHORT : MUBUF_Pseudo_Loads <
+defm BUFFER_LOAD_USHORT : MUBUF_Pseudo_Loads_Lds <
   "buffer_load_ushort", VGPR_32, i32, mubuf_az_extloadi16
 >;
-defm BUFFER_LOAD_SSHORT : MUBUF_Pseudo_Loads <
+defm BUFFER_LOAD_SSHORT : MUBUF_Pseudo_Loads_Lds <
   "buffer_load_sshort", VGPR_32, i32, mubuf_sextloadi16
 >;
-defm BUFFER_LOAD_DWORD : MUBUF_Pseudo_Loads <
+defm BUFFER_LOAD_DWORD : MUBUF_Pseudo_Loads_Lds <
   "buffer_load_dword", VGPR_32, i32, mubuf_load
 >;
 defm BUFFER_LOAD_DWORDX2 : MUBUF_Pseudo_Loads <
   "buffer_load_dwordx2", VReg_64, v2i32, mubuf_load
 >;
 defm BUFFER_LOAD_DWORDX3 : MUBUF_Pseudo_Loads <
   "buffer_load_dwordx3", VReg_96, untyped, mubuf_load
 >;
class MUBUF_Real_si <bits<7> op, MUBUF_Pseudo ps> :
   let AssemblerPredicate=isSICI;
   let DecoderNamespace="SICI";
 
   let Inst{11-0}  = !if(ps.has_offset, offset, ?);
   let Inst{12}    = ps.offen;
   let Inst{13}    = ps.idxen;
   let Inst{14}    = !if(ps.has_glc, glc, ps.glc_value);
   let Inst{15}    = ps.addr64;
-  let Inst{16}    = lds;
+  let Inst{16}    = !if(ps.lds, 1, 0);
   let Inst{24-18} = op;
   let Inst{31-26} = 0x38; //encoding
   let Inst{39-32} = !if(ps.has_vaddr, vaddr, ?);
   let Inst{47-40} = !if(ps.has_vdata, vdata, ?);
   let Inst{52-48} = !if(ps.has_srsrc, srsrc{6-2}, ?);
   let Inst{54}    = !if(ps.has_slc, slc, ?);
   let Inst{55}    = !if(ps.has_tfe, tfe, ?);
   let Inst{63-56} = !if(ps.has_soffset, soffset, ?);
 }
 
 multiclass MUBUF_Real_AllAddr_si<bits<7> op> {
   def _OFFSET_si : MUBUF_Real_si <op, !cast<MUBUF_Pseudo>(NAME#"_OFFSET")>;
   def _ADDR64_si : MUBUF_Real_si <op, !cast<MUBUF_Pseudo>(NAME#"_ADDR64")>;
   def _OFFEN_si  : MUBUF_Real_si <op, !cast<MUBUF_Pseudo>(NAME#"_OFFEN")>;
   def _IDXEN_si  : MUBUF_Real_si <op, !cast<MUBUF_Pseudo>(NAME#"_IDXEN")>;
   def _BOTHEN_si : MUBUF_Real_si <op, !cast<MUBUF_Pseudo>(NAME#"_BOTHEN")>;
 }
 
+multiclass MUBUF_Real_AllAddr_Lds_si<bits<7> op> {
+
+  def _OFFSET_si : MUBUF_Real_si <op, !cast<MUBUF_Pseudo>(NAME#"_OFFSET")>,
+                   MUBUFLdsTable<0, "_OFFSET_si">;
+  def _ADDR64_si : MUBUF_Real_si <op, !cast<MUBUF_Pseudo>(NAME#"_ADDR64")>,
+                   MUBUFLdsTable<0, "_ADDR64_si">;
+  def _OFFEN_si  : MUBUF_Real_si <op, !cast<MUBUF_Pseudo>(NAME#"_OFFEN")>,
+                   MUBUFLdsTable<0, "_OFFEN_si">;
+  def _IDXEN_si  : MUBUF_Real_si <op, !cast<MUBUF_Pseudo>(NAME#"_IDXEN")>,
+                   MUBUFLdsTable<0, "_IDXEN_si">;
+  def _BOTHEN_si : MUBUF_Real_si <op, !cast<MUBUF_Pseudo>(NAME#"_BOTHEN")>,
+                   MUBUFLdsTable<0, "_BOTHEN_si">;
+
+  def _LDS_OFFSET_si : MUBUF_Real_si <op, !cast<MUBUF_Pseudo>(NAME#"_LDS_OFFSET")>,
+                       MUBUFLdsTable<1, "_OFFSET_si">;
+  def _LDS_ADDR64_si : MUBUF_Real_si <op, !cast<MUBUF_Pseudo>(NAME#"_LDS_ADDR64")>,
+                       MUBUFLdsTable<1, "_ADDR64_si">;
+  def _LDS_OFFEN_si  : MUBUF_Real_si <op, !cast<MUBUF_Pseudo>(NAME#"_LDS_OFFEN")>,
+                       MUBUFLdsTable<1, "_OFFEN_si">;
+  def _LDS_IDXEN_si  : MUBUF_Real_si <op, !cast<MUBUF_Pseudo>(NAME#"_LDS_IDXEN")>,
+                       MUBUFLdsTable<1, "_IDXEN_si">;
+  def _LDS_BOTHEN_si : MUBUF_Real_si <op, !cast<MUBUF_Pseudo>(NAME#"_LDS_BOTHEN")>,
+                       MUBUFLdsTable<1, "_BOTHEN_si">;
+}
+
 multiclass MUBUF_Real_Atomic_si<bits<7> op> : MUBUF_Real_AllAddr_si<op> {
   def _OFFSET_RTN_si : MUBUF_Real_si <op, !cast<MUBUF_Pseudo>(NAME#"_OFFSET_RTN")>;
   def _ADDR64_RTN_si : MUBUF_Real_si <op, !cast<MUBUF_Pseudo>(NAME#"_ADDR64_RTN")>;
   def _OFFEN_RTN_si  : MUBUF_Real_si <op, !cast<MUBUF_Pseudo>(NAME#"_OFFEN_RTN")>;
   def _IDXEN_RTN_si  : MUBUF_Real_si <op, !cast<MUBUF_Pseudo>(NAME#"_IDXEN_RTN")>;
   def _BOTHEN_RTN_si : MUBUF_Real_si <op, !cast<MUBUF_Pseudo>(NAME#"_BOTHEN_RTN")>;
 }
 
-defm BUFFER_LOAD_FORMAT_X       : MUBUF_Real_AllAddr_si <0x00>;
+defm BUFFER_LOAD_FORMAT_X       : MUBUF_Real_AllAddr_Lds_si <0x00>;
 defm BUFFER_LOAD_FORMAT_XY      : MUBUF_Real_AllAddr_si <0x01>;
 defm BUFFER_LOAD_FORMAT_XYZ     : MUBUF_Real_AllAddr_si <0x02>;
 defm BUFFER_LOAD_FORMAT_XYZW    : MUBUF_Real_AllAddr_si <0x03>;
 defm BUFFER_STORE_FORMAT_X      : MUBUF_Real_AllAddr_si <0x04>;
 defm BUFFER_STORE_FORMAT_XY     : MUBUF_Real_AllAddr_si <0x05>;
 defm BUFFER_STORE_FORMAT_XYZ    : MUBUF_Real_AllAddr_si <0x06>;
 defm BUFFER_STORE_FORMAT_XYZW   : MUBUF_Real_AllAddr_si <0x07>;
-defm BUFFER_LOAD_UBYTE          : MUBUF_Real_AllAddr_si <0x08>;
-defm BUFFER_LOAD_SBYTE          : MUBUF_Real_AllAddr_si <0x09>;
-defm BUFFER_LOAD_USHORT         : MUBUF_Real_AllAddr_si <0x0a>;
-defm BUFFER_LOAD_SSHORT         : MUBUF_Real_AllAddr_si <0x0b>;
-defm BUFFER_LOAD_DWORD          : MUBUF_Real_AllAddr_si <0x0c>;
+defm BUFFER_LOAD_UBYTE          : MUBUF_Real_AllAddr_Lds_si <0x08>;
+defm BUFFER_LOAD_SBYTE          : MUBUF_Real_AllAddr_Lds_si <0x09>;
+defm BUFFER_LOAD_USHORT         : MUBUF_Real_AllAddr_Lds_si <0x0a>;
+defm BUFFER_LOAD_SSHORT         : MUBUF_Real_AllAddr_Lds_si <0x0b>;
+defm BUFFER_LOAD_DWORD          : MUBUF_Real_AllAddr_Lds_si <0x0c>;
 defm BUFFER_LOAD_DWORDX2        : MUBUF_Real_AllAddr_si <0x0d>;
 defm BUFFER_LOAD_DWORDX4        : MUBUF_Real_AllAddr_si <0x0e>;
 defm BUFFER_LOAD_DWORDX3        : MUBUF_Real_AllAddr_si <0x0f>;
 defm BUFFER_STORE_BYTE          : MUBUF_Real_AllAddr_si <0x18>;
 defm BUFFER_STORE_SHORT         : MUBUF_Real_AllAddr_si <0x1a>;
 defm BUFFER_STORE_DWORD         : MUBUF_Real_AllAddr_si <0x1c>;
 defm BUFFER_STORE_DWORDX2       : MUBUF_Real_AllAddr_si <0x1d>;
 defm BUFFER_STORE_DWORDX4       : MUBUF_Real_AllAddr_si <0x1e>;
class MUBUF_Real_vi <bits<7> op, MUBUF_Pseudo ps> :
   SIMCInstr<ps.PseudoInstr, SIEncodingFamily.VI> {
   let AssemblerPredicate=isVI;
   let DecoderNamespace="VI";
 
   let Inst{11-0}  = !if(ps.has_offset, offset, ?);
   let Inst{12}    = ps.offen;
   let Inst{13}    = ps.idxen;
   let Inst{14}    = !if(ps.has_glc, glc, ps.glc_value);
-  let Inst{16}    = lds;
+  let Inst{16}    = !if(ps.lds, 1, 0);
   let Inst{17}    = !if(ps.has_slc, slc, ?);
   let Inst{24-18} = op;
   let Inst{31-26} = 0x38; //encoding
   let Inst{39-32} = !if(ps.has_vaddr, vaddr, ?);
   let Inst{47-40} = !if(ps.has_vdata, vdata, ?);
   let Inst{52-48} = !if(ps.has_srsrc, srsrc{6-2}, ?);
   let Inst{55}    = !if(ps.has_tfe, tfe, ?);
   let Inst{63-56} = !if(ps.has_soffset, soffset, ?);
 }
 
 multiclass MUBUF_Real_AllAddr_vi<bits<7> op> {
   def _OFFSET_vi : MUBUF_Real_vi <op, !cast<MUBUF_Pseudo>(NAME#"_OFFSET")>;
   def _OFFEN_vi  : MUBUF_Real_vi <op, !cast<MUBUF_Pseudo>(NAME#"_OFFEN")>;
   def _IDXEN_vi  : MUBUF_Real_vi <op, !cast<MUBUF_Pseudo>(NAME#"_IDXEN")>;
   def _BOTHEN_vi : MUBUF_Real_vi <op, !cast<MUBUF_Pseudo>(NAME#"_BOTHEN")>;
 }
 
+multiclass MUBUF_Real_AllAddr_Lds_vi<bits<7> op> {
+
+  def _OFFSET_vi : MUBUF_Real_vi <op, !cast<MUBUF_Pseudo>(NAME#"_OFFSET")>,
+                   MUBUFLdsTable<0, "_OFFSET_vi">;
+  def _OFFEN_vi  : MUBUF_Real_vi <op, !cast<MUBUF_Pseudo>(NAME#"_OFFEN")>,
+                   MUBUFLdsTable<0, "_OFFEN_vi">;
+  def _IDXEN_vi  : MUBUF_Real_vi <op, !cast<MUBUF_Pseudo>(NAME#"_IDXEN")>,
+                   MUBUFLdsTable<0, "_IDXEN_vi">;
+  def _BOTHEN_vi : MUBUF_Real_vi <op, !cast<MUBUF_Pseudo>(NAME#"_BOTHEN")>,
+                   MUBUFLdsTable<0, "_BOTHEN_vi">;
+
+  def _LDS_OFFSET_vi : MUBUF_Real_vi <op, !cast<MUBUF_Pseudo>(NAME#"_LDS_OFFSET")>,
+                       MUBUFLdsTable<1, "_OFFSET_vi">;
+  def _LDS_OFFEN_vi  : MUBUF_Real_vi <op, !cast<MUBUF_Pseudo>(NAME#"_LDS_OFFEN")>,
+                       MUBUFLdsTable<1, "_OFFEN_vi">;
+  def _LDS_IDXEN_vi  : MUBUF_Real_vi <op, !cast<MUBUF_Pseudo>(NAME#"_LDS_IDXEN")>,
+                       MUBUFLdsTable<1, "_IDXEN_vi">;
+  def _LDS_BOTHEN_vi : MUBUF_Real_vi <op, !cast<MUBUF_Pseudo>(NAME#"_LDS_BOTHEN")>,
+                       MUBUFLdsTable<1, "_BOTHEN_vi">;
+}
+
 class MUBUF_Real_gfx80 <bits<7> op, MUBUF_Pseudo ps> :
   MUBUF_Real<op, ps>,
   Enc64,
   SIMCInstr<ps.PseudoInstr, SIEncodingFamily.GFX80> {
   let AssemblerPredicate=HasUnpackedD16VMem;
   let DecoderNamespace="GFX80_UNPACKED";
 
   let Inst{11-0}  = !if(ps.has_offset, offset, ?);
   let Inst{12}    = ps.offen;
   let Inst{13}    = ps.idxen;
   let Inst{14}    = !if(ps.has_glc, glc, ps.glc_value);
-  let Inst{16}    = lds;
+  let Inst{16}    = !if(ps.lds, 1, 0);
   let Inst{17}    = !if(ps.has_slc, slc, ?);
   let Inst{24-18} = op;
   let Inst{31-26} = 0x38; //encoding
   let Inst{39-32} = !if(ps.has_vaddr, vaddr, ?);
   let Inst{47-40} = !if(ps.has_vdata, vdata, ?);
   let Inst{52-48} = !if(ps.has_srsrc, srsrc{6-2}, ?);
   let Inst{55}    = !if(ps.has_tfe, tfe, ?);
   let Inst{63-56} = !if(ps.has_soffset, soffset, ?);

 multiclass MUBUF_Real_Atomic_vi<bits<7> op> :
   MUBUF_Real_AllAddr_vi<op> {
   def _OFFSET_RTN_vi : MUBUF_Real_vi <op, !cast<MUBUF_Pseudo>(NAME#"_OFFSET_RTN")>;
   def _OFFEN_RTN_vi  : MUBUF_Real_vi <op, !cast<MUBUF_Pseudo>(NAME#"_OFFEN_RTN")>;
   def _IDXEN_RTN_vi  : MUBUF_Real_vi <op, !cast<MUBUF_Pseudo>(NAME#"_IDXEN_RTN")>;
   def _BOTHEN_RTN_vi : MUBUF_Real_vi <op, !cast<MUBUF_Pseudo>(NAME#"_BOTHEN_RTN")>;
 }
 
-defm BUFFER_LOAD_FORMAT_X       : MUBUF_Real_AllAddr_vi <0x00>;
+defm BUFFER_LOAD_FORMAT_X       : MUBUF_Real_AllAddr_Lds_vi <0x00>;
 defm BUFFER_LOAD_FORMAT_XY      : MUBUF_Real_AllAddr_vi <0x01>;
 defm BUFFER_LOAD_FORMAT_XYZ     : MUBUF_Real_AllAddr_vi <0x02>;
 defm BUFFER_LOAD_FORMAT_XYZW    : MUBUF_Real_AllAddr_vi <0x03>;
 defm BUFFER_STORE_FORMAT_X      : MUBUF_Real_AllAddr_vi <0x04>;
 defm BUFFER_STORE_FORMAT_XY     : MUBUF_Real_AllAddr_vi <0x05>;
 defm BUFFER_STORE_FORMAT_XYZ    : MUBUF_Real_AllAddr_vi <0x06>;
 defm BUFFER_STORE_FORMAT_XYZW   : MUBUF_Real_AllAddr_vi <0x07>;
 let SubtargetPredicate = HasUnpackedD16VMem in {
let SubtargetPredicate = HasPackedD16VMem in {
   defm BUFFER_LOAD_FORMAT_D16_XY      : MUBUF_Real_AllAddr_vi <0x09>;
   defm BUFFER_LOAD_FORMAT_D16_XYZ     : MUBUF_Real_AllAddr_vi <0x0a>;
   defm BUFFER_LOAD_FORMAT_D16_XYZW    : MUBUF_Real_AllAddr_vi <0x0b>;
   defm BUFFER_STORE_FORMAT_D16_X      : MUBUF_Real_AllAddr_vi <0x0c>;
   defm BUFFER_STORE_FORMAT_D16_XY     : MUBUF_Real_AllAddr_vi <0x0d>;
   defm BUFFER_STORE_FORMAT_D16_XYZ    : MUBUF_Real_AllAddr_vi <0x0e>;
   defm BUFFER_STORE_FORMAT_D16_XYZW   : MUBUF_Real_AllAddr_vi <0x0f>;
 } // End HasPackedD16VMem.
-defm BUFFER_LOAD_UBYTE          : MUBUF_Real_AllAddr_vi <0x10>;
-defm BUFFER_LOAD_SBYTE          : MUBUF_Real_AllAddr_vi <0x11>;
-defm BUFFER_LOAD_USHORT         : MUBUF_Real_AllAddr_vi <0x12>;
-defm BUFFER_LOAD_SSHORT         : MUBUF_Real_AllAddr_vi <0x13>;
-defm BUFFER_LOAD_DWORD          : MUBUF_Real_AllAddr_vi <0x14>;
+defm BUFFER_LOAD_UBYTE          : MUBUF_Real_AllAddr_Lds_vi <0x10>;
+defm BUFFER_LOAD_SBYTE          : MUBUF_Real_AllAddr_Lds_vi <0x11>;
+defm BUFFER_LOAD_USHORT         : MUBUF_Real_AllAddr_Lds_vi <0x12>;
+defm BUFFER_LOAD_SSHORT         : MUBUF_Real_AllAddr_Lds_vi <0x13>;
+defm BUFFER_LOAD_DWORD          : MUBUF_Real_AllAddr_Lds_vi <0x14>;
 defm BUFFER_LOAD_DWORDX2        : MUBUF_Real_AllAddr_vi <0x15>;
 defm BUFFER_LOAD_DWORDX3        : MUBUF_Real_AllAddr_vi <0x16>;
 defm BUFFER_LOAD_DWORDX4        : MUBUF_Real_AllAddr_vi <0x17>;
 defm BUFFER_STORE_BYTE          : MUBUF_Real_AllAddr_vi <0x18>;
 defm BUFFER_STORE_BYTE_D16_HI   : MUBUF_Real_AllAddr_vi <0x19>;
 defm BUFFER_STORE_SHORT         : MUBUF_Real_AllAddr_vi <0x1a>;
 defm BUFFER_STORE_SHORT_D16_HI  : MUBUF_Real_AllAddr_vi <0x1b>;
 defm BUFFER_STORE_DWORD         : MUBUF_Real_AllAddr_vi <0x1c>;

lib/Target/AMDGPU/SIInstrInfo.td

 def getAddr64Inst : InstrMapping {
   let FilterClass = "MUBUFAddr64Table";
   let RowFields = ["OpName"];
   let ColFields = ["IsAddr64"];
   let KeyCol = ["0"];
   let ValueCols = [["1"]];
 }
 
+def getMUBUFNoLdsInst : InstrMapping {
+  let FilterClass = "MUBUFLdsTable";
+  let RowFields = ["OpName"];
+  let ColFields = ["IsLds"];
+  let KeyCol = ["1"];
+  let ValueCols = [["0"]];
+}
+
 // Maps an atomic opcode to its version with a return value.
 def getAtomicRetOp : InstrMapping {
   let FilterClass = "AtomicNoRet";
   let RowFields = ["NoRetOp"];
   let ColFields = ["IsRet"];
   let KeyCol = ["0"];
   let ValueCols = [["1"]];
 }

test/MC/AMDGPU/mubuf.s

 
 buffer_atomic_inc v1, v[2:3], s[8:11], 56 idxen offen offset:4 glc
 // SICI: buffer_atomic_inc v1, v[2:3], s[8:11], 56 idxen offen offset:4 glc ; encoding: [0x04,0x70,0xf0,0xe0,0x02,0x01,0x02,0xb8]
 // VI:   buffer_atomic_inc v1, v[2:3], s[8:11], 56 idxen offen offset:4 glc ; encoding: [0x04,0x70,0x2c,0xe1,0x02,0x01,0x02,0xb8]
 
 buffer_atomic_inc v1, v[2:3], s[8:11], 56 idxen offen offset:4 glc slc
 // SICI: buffer_atomic_inc v1, v[2:3], s[8:11], 56 idxen offen offset:4 glc slc ; encoding: [0x04,0x70,0xf0,0xe0,0x02,0x01,0x42,0xb8]
 // VI:   buffer_atomic_inc v1, v[2:3], s[8:11], 56 idxen offen offset:4 glc slc ; encoding: [0x04,0x70,0x2e,0xe1,0x02,0x01,0x02,0xb8]
+
+//===----------------------------------------------------------------------===//
+// Lds support
+//===----------------------------------------------------------------------===//
+
+buffer_load_sbyte v5, off, s[8:11], s3 lds
+// SICI: buffer_load_sbyte v5, off, s[8:11], s3 lds ; encoding: [0x00,0x00,0x25,0xe0,0x00,0x05,0x02,0x03]
+// VI:   buffer_load_sbyte v5, off, s[8:11], s3 lds ; encoding: [0x00,0x00,0x45,0xe0,0x00,0x05,0x02,0x03]
+
+buffer_load_sbyte v5, off, s[8:11], s3 glc slc lds
+// SICI: buffer_load_sbyte v5, off, s[8:11], s3 glc slc lds ; encoding: [0x00,0x40,0x25,0xe0,0x00,0x05,0x42,0x03]
+// VI:   buffer_load_sbyte v5, off, s[8:11], s3 glc slc lds ; encoding: [0x00,0x40,0x47,0xe0,0x00,0x05,0x02,0x03]
+
+buffer_load_sbyte v5, off, s[8:11], s3 offset:4095 glc slc lds
+// SICI: buffer_load_sbyte v5, off, s[8:11], s3 offset:4095 glc slc lds ; encoding: [0xff,0x4f,0x25,0xe0,0x00,0x05,0x42,0x03]
+// VI:   buffer_load_sbyte v5, off, s[8:11], s3 offset:4095 glc slc lds ; encoding: [0xff,0x4f,0x47,0xe0,0x00,0x05,0x02,0x03]
+
+buffer_load_sbyte v5, v0, s[8:11], s3 offen offset:4095 slc lds
+// SICI: buffer_load_sbyte v5, v0, s[8:11], s3 offen offset:4095 slc lds ; encoding: [0xff,0x1f,0x25,0xe0,0x00,0x05,0x42,0x03]
+// VI:   buffer_load_sbyte v5, v0, s[8:11], s3 offen offset:4095 slc lds ; encoding: [0xff,0x1f,0x47,0xe0,0x00,0x05,0x02,0x03]
+
+buffer_load_sbyte v5, v0, s[8:11], s3 offen lds
+// SICI: buffer_load_sbyte v5, v0, s[8:11], s3 offen lds ; encoding: [0x00,0x10,0x25,0xe0,0x00,0x05,0x02,0x03]
+// VI:   buffer_load_sbyte v5, v0, s[8:11], s3 offen lds ; encoding: [0x00,0x10,0x45,0xe0,0x00,0x05,0x02,0x03]
+
+buffer_load_sbyte v5, v0, s[8:11], s3 idxen glc slc lds
+// SICI: buffer_load_sbyte v5, v0, s[8:11], s3 idxen glc slc lds ; encoding: [0x00,0x60,0x25,0xe0,0x00,0x05,0x42,0x03]
+// VI:   buffer_load_sbyte v5, v0, s[8:11], s3 idxen glc slc lds ; encoding: [0x00,0x60,0x47,0xe0,0x00,0x05,0x02,0x03]
+
+buffer_load_sbyte v5, v[0:1], s[8:11], s3 idxen offen offset:4095 lds
+// SICI: buffer_load_sbyte v5, v[0:1], s[8:11], s3 idxen offen offset:4095 lds ; encoding: [0xff,0x3f,0x25,0xe0,0x00,0x05,0x02,0x03]
+// VI:   buffer_load_sbyte v5, v[0:1], s[8:11], s3 idxen offen offset:4095 lds ; encoding: [0xff,0x3f,0x45,0xe0,0x00,0x05,0x02,0x03]
+
+buffer_load_sbyte v5, v[0:1], s[8:11], s3 idxen offen offset:4095 glc slc lds
+// SICI: buffer_load_sbyte v5, v[0:1], s[8:11], s3 idxen offen offset:4095 glc slc lds ; encoding: [0xff,0x7f,0x25,0xe0,0x00,0x05,0x42,0x03]
+// VI:   buffer_load_sbyte v5, v[0:1], s[8:11], s3 idxen offen offset:4095 glc slc lds ; encoding: [0xff,0x7f,0x47,0xe0,0x00,0x05,0x02,0x03]
+
+buffer_load_ubyte v5, off, s[8:11], s3 offset:4095 lds
+// SICI: buffer_load_ubyte v5, off, s[8:11], s3 offset:4095 lds ; encoding: [0xff,0x0f,0x21,0xe0,0x00,0x05,0x02,0x03]
+// VI:   buffer_load_ubyte v5, off, s[8:11], s3 offset:4095 lds ; encoding: [0xff,0x0f,0x41,0xe0,0x00,0x05,0x02,0x03]
+
+buffer_load_sshort v5, v0, s[8:11], s3 offen offset:4095 glc slc lds
+// SICI: buffer_load_sshort v5, v0, s[8:11], s3 offen offset:4095 glc slc lds ; encoding: [0xff,0x5f,0x2d,0xe0,0x00,0x05,0x42,0x03]
+// VI:   buffer_load_sshort v5, v0, s[8:11], s3 offen offset:4095 glc slc lds ; encoding: [0xff,0x5f,0x4f,0xe0,0x00,0x05,0x02,0x03]
+
+buffer_load_ushort v5, v0, s[8:11], s3 idxen offset:4095 glc slc lds
+// SICI: buffer_load_ushort v5, v0, s[8:11], s3 idxen offset:4095 glc slc lds ; encoding: [0xff,0x6f,0x29,0xe0,0x00,0x05,0x42,0x03]
+// VI:   buffer_load_ushort v5, v0, s[8:11], s3 idxen offset:4095 glc slc lds ; encoding: [0xff,0x6f,0x4b,0xe0,0x00,0x05,0x02,0x03]
+
+buffer_load_dword v5, v0, s[8:11], s101 offen lds
+// SICI: buffer_load_dword v5, v0, s[8:11], s101 offen lds ; encoding: [0x00,0x10,0x31,0xe0,0x00,0x05,0x02,0x65]
+// VI:   buffer_load_dword v5, v0, s[8:11], s101 offen lds ; encoding: [0x00,0x10,0x51,0xe0,0x00,0x05,0x02,0x65]
+
+buffer_load_format_x v5, v[0:1], s[8:11], s3 idxen offen offset:4095 glc slc lds
+// SICI: buffer_load_format_x v5, v[0:1], s[8:11], s3 idxen offen offset:4095 glc slc lds ; encoding: [0xff,0x7f,0x01,0xe0,0x00,0x05,0x42,0x03]
+// VI:   buffer_load_format_x v5, v[0:1], s[8:11], s3 idxen offen offset:4095 glc slc lds ; encoding: [0xff,0x7f,0x03,0xe0,0x00,0x05,0x02,0x03]

test/MC/Disassembler/AMDGPU/mubuf_vi.txt

 # VI:   buffer_atomic_inc v1, v[2:3], s[8:11], 56 idxen offen glc slc ; encoding: [0x00,0x70,0x2e,0xe1,0x02,0x01,0x02,0xb8]
 0x00 0x70 0x2e 0xe1 0x02 0x01 0x02 0xb8
 
 # VI:   buffer_atomic_inc v1, v[2:3], s[8:11], 56 idxen offen offset:4 glc ; encoding: [0x04,0x70,0x2c,0xe1,0x02,0x01,0x02,0xb8]
 0x04 0x70 0x2c 0xe1 0x02 0x01 0x02 0xb8
 
 # VI:   buffer_atomic_inc v1, v[2:3], s[8:11], 56 idxen offen offset:4 glc slc ; encoding: [0x04,0x70,0x2e,0xe1,0x02,0x01,0x02,0xb8]
 0x04 0x70 0x2e 0xe1 0x02 0x01 0x02 0xb8
+
+#===------------------------------------------------------------------------===#
+# Lds support
+#===------------------------------------------------------------------------===#
+
+# VI:   buffer_load_sbyte v5, off, s[8:11], s3 lds ; encoding: [0x00,0x00,0x45,0xe0,0x00,0x05,0x02,0x03]
+0x00,0x00,0x45,0xe0,0x00,0x05,0x02,0x03
+
+# VI:   buffer_load_sbyte v5, off, s[8:11], s3 glc slc lds ; encoding: [0x00,0x40,0x47,0xe0,0x00,0x05,0x02,0x03]
+0x00,0x40,0x47,0xe0,0x00,0x05,0x02,0x03
+
+# VI:   buffer_load_sbyte v5, off, s[8:11], s3 offset:4095 glc slc lds ; encoding: [0xff,0x4f,0x47,0xe0,0x00,0x05,0x02,0x03]
+0xff,0x4f,0x47,0xe0,0x00,0x05,0x02,0x03
+
+# VI:   buffer_load_sbyte v5, v0, s[8:11], s3 offen offset:4095 slc lds ; encoding: [0xff,0x1f,0x47,0xe0,0x00,0x05,0x02,0x03]
+0xff,0x1f,0x47,0xe0,0x00,0x05,0x02,0x03
+
+# VI:   buffer_load_sbyte v5, v0, s[8:11], s3 offen lds ; encoding: [0x00,0x10,0x45,0xe0,0x00,0x05,0x02,0x03]
+0x00,0x10,0x45,0xe0,0x00,0x05,0x02,0x03
+
+# VI:   buffer_load_sbyte v5, v0, s[8:11], s3 idxen glc slc lds ; encoding: [0x00,0x60,0x47,0xe0,0x00,0x05,0x02,0x03]
+0x00,0x60,0x47,0xe0,0x00,0x05,0x02,0x03
+
+# VI:   buffer_load_sbyte v5, v[0:1], s[8:11], s3 idxen offen offset:4095 lds ; encoding: [0xff,0x3f,0x45,0xe0,0x00,0x05,0x02,0x03]
+0xff,0x3f,0x45,0xe0,0x00,0x05,0x02,0x03
+
+# VI:   buffer_load_sbyte v5, v[0:1], s[8:11], s3 idxen offen offset:4095 glc slc lds ; encoding: [0xff,0x7f,0x47,0xe0,0x00,0x05,0x02,0x03]
+0xff,0x7f,0x47,0xe0,0x00,0x05,0x02,0x03
+
+# VI:   buffer_load_ubyte v5, off, s[8:11], s3 offset:4095 lds ; encoding: [0xff,0x0f,0x41,0xe0,0x00,0x05,0x02,0x03]
+0xff,0x0f,0x41,0xe0,0x00,0x05,0x02,0x03
+
+# VI:   buffer_load_sshort v5, v0, s[8:11], s3 offen offset:4095 glc slc lds ; encoding: [0xff,0x5f,0x4f,0xe0,0x00,0x05,0x02,0x03]
+0xff,0x5f,0x4f,0xe0,0x00,0x05,0x02,0x03
+
+# VI:   buffer_load_ushort v5, v0, s[8:11], s3 idxen offset:4095 glc slc lds ; encoding: [0xff,0x6f,0x4b,0xe0,0x00,0x05,0x02,0x03]
+0xff,0x6f,0x4b,0xe0,0x00,0x05,0x02,0x03
+
+# VI:   buffer_load_dword v5, v0, s[8:11], s101 offen lds ; encoding: [0x00,0x10,0x51,0xe0,0x00,0x05,0x02,0x65]
+0x00,0x10,0x51,0xe0,0x00,0x05,0x02,0x65
+
+# VI:   buffer_load_format_x v5, v[0:1], s[8:11], s3 idxen offen offset:4095 glc slc lds ; encoding: [0xff,0x7f,0x03,0xe0,0x00,0x05,0x02,0x03]
+0xff,0x7f,0x03,0xe0,0x00,0x05,0x02,0x03