Index: lib/Target/Mips/AsmParser/MipsAsmParser.cpp
===================================================================
--- lib/Target/Mips/AsmParser/MipsAsmParser.cpp
+++ lib/Target/Mips/AsmParser/MipsAsmParser.cpp
@@ -221,6 +221,9 @@
   bool expandUlh(MCInst &Inst, bool Signed, SMLoc IDLoc,
                  SmallVectorImpl<MCInst> &Instructions);
 
+  bool expandTrunc(MCInst &Inst, bool isDouble, bool is64Bit, SMLoc IDLoc,
+                   SmallVectorImpl<MCInst> &Instructions);
+
   bool expandUlw(MCInst &Inst, SMLoc IDLoc,
                  SmallVectorImpl<MCInst> &Instructions);
 
@@ -2037,6 +2040,16 @@
   case Mips::DUDivMacro:
     return expandDiv(Inst, IDLoc, Instructions, true, false) ? MER_Fail
                                                              : MER_Success;
+  case Mips::PseudoTRUNC_W_S:
+    return expandTrunc(Inst, false, false, IDLoc, Instructions) ? MER_Fail
+                                                                : MER_Success;
+  case Mips::PseudoTRUNC_W_D32:
+    return expandTrunc(Inst, true, false, IDLoc, Instructions) ? MER_Fail
+                                                               : MER_Success;
+  case Mips::PseudoTRUNC_W_D:
+    return expandTrunc(Inst, true, true, IDLoc, Instructions) ? MER_Fail
+                                                              : MER_Success;
+
   case Mips::Ulh:
     return expandUlh(Inst, true, IDLoc, Instructions) ? MER_Fail : MER_Success;
   case Mips::Ulhu:
@@ -3027,6 +3040,47 @@
   return false;
 }
 
+bool MipsAsmParser::expandTrunc(MCInst &Inst, bool isDouble, bool is64Bit,
+                                SMLoc IDLoc,
+                                SmallVectorImpl<MCInst> &Instructions) {
+
+  assert(Inst.getNumOperands() == 3 && "Invalid operand count");
+  assert(Inst.getOperand(0).isReg() && Inst.getOperand(1).isReg() &&
+         Inst.getOperand(2).isReg() && "Invalid instruction operand.");
+
+  unsigned FirstReg = Inst.getOperand(0).getReg();
+  unsigned SecondReg = Inst.getOperand(1).getReg();
+  unsigned ThirdReg = Inst.getOperand(2).getReg();
+
+  if (hasMips1() && !hasMips2()) {
+    unsigned ATReg = getATReg(IDLoc);
+    if (!ATReg)
+      return true;
+    emitRR(Mips::CFC1, ThirdReg, Mips::RA, IDLoc, Instructions);
+    emitRR(Mips::CFC1, ThirdReg, Mips::RA, IDLoc, Instructions);
+    if (AssemblerOptions.back()->isReorder())
+      createNop(hasShortDelaySlot(Inst.getOpcode()), IDLoc, Instructions);
+    emitRRI(Mips::ORi, ATReg, ThirdReg, 0x3, IDLoc, Instructions);
+    emitRRI(Mips::XORi, ATReg, ATReg, 0x2, IDLoc, Instructions);
+    emitRR(Mips::CTC1, Mips::RA, ATReg, IDLoc, Instructions);
+    if (AssemblerOptions.back()->isReorder())
+      createNop(hasShortDelaySlot(Inst.getOpcode()), IDLoc, Instructions);
+    emitRR(isDouble ? (is64Bit ? Mips::CVT_W_D64 : Mips::CVT_W_D32)
+                    : Mips::CVT_W_S,
+           FirstReg, SecondReg, IDLoc, Instructions);
+    emitRR(Mips::CTC1, Mips::RA, ThirdReg, IDLoc, Instructions);
+    if (isDouble && AssemblerOptions.back()->isReorder())
+      createNop(hasShortDelaySlot(Inst.getOpcode()), IDLoc, Instructions);
+    return false;
+  }
+
+  emitRR(isDouble ? (is64Bit ? Mips::TRUNC_W_D64 : Mips::TRUNC_W_D32)
+                  : Mips::TRUNC_W_S,
+         FirstReg, SecondReg, IDLoc, Instructions);
+
+  return false;
+}
+
 bool MipsAsmParser::expandUlh(MCInst &Inst, bool Signed, SMLoc IDLoc,
                               SmallVectorImpl<MCInst> &Instructions) {
   if (hasMips32r6() || hasMips64r6()) {
Index: lib/Target/Mips/MipsInstrFPU.td
===================================================================
--- lib/Target/Mips/MipsInstrFPU.td
+++ lib/Target/Mips/MipsInstrFPU.td
@@ -551,6 +551,15 @@
 def ExtractElementF64 : ExtractElementF64Base<AFGR64Opnd>, FGR_32, HARDFLOAT;
 def ExtractElementF64_64 : ExtractElementF64Base<FGR64Opnd>, FGR_64, HARDFLOAT;
 
+def PseudoTRUNC_W_S : MipsAsmPseudoInst<(outs FGR32Opnd : $fd), 
+  (ins FGR32Opnd : $fs, GPR32Opnd : $rs), "trunc.w.s\t$fd, $fs, $rs">;
+
+def PseudoTRUNC_W_D32 : MipsAsmPseudoInst<(outs FGR32Opnd : $fd), 
+  (ins AFGR64Opnd : $fs, GPR32Opnd : $rs), "trunc.w.d\t$fd, $fs, $rs">, FGR_32, HARDFLOAT;
+
+def PseudoTRUNC_W_D : MipsAsmPseudoInst<(outs FGR32Opnd : $fd), 
+  (ins FGR64Opnd : $fs, GPR32Opnd : $rs), "trunc.w.d\t$fd, $fs, $rs">, FGR_64, HARDFLOAT;
+
 //===----------------------------------------------------------------------===//
 // InstAliases.
 //===----------------------------------------------------------------------===//
Index: test/MC/Mips/mips1/valid.s
===================================================================
--- test/MC/Mips/mips1/valid.s
+++ test/MC/Mips/mips1/valid.s
@@ -123,4 +123,28 @@
         xor       $s2,$a0,$s8
         xor       $2, 4                # CHECK: xori $2, $2, 4         # encoding: [0x38,0x42,0x00,0x04]
 
+        .set at
+        trunc.w.s	$f4,$f6,$4
+        # CHECK:                cfc1    $4, $ra                 # encoding: [0x44,0x44,0xf8,0x00]
+        # CHECK:                cfc1    $4, $ra                 # encoding: [0x44,0x44,0xf8,0x00]
+        # CHECK:                nop                             # encoding: [0x00,0x00,0x00,0x00]
+        # CHECK:                ori     $1, $4, 3               # encoding: [0x34,0x81,0x00,0x03]
+        # CHECK:                xori    $1, $1, 2               # encoding: [0x38,0x21,0x00,0x02]
+        # CHECK:                ctc1    $1, $ra                 # encoding: [0x44,0xc1,0xf8,0x00]
+        # CHECK:                nop                             # encoding: [0x00,0x00,0x00,0x00]
+        # CHECK:                cvt.w.s $f4, $f6                # encoding: [0x46,0x00,0x31,0x24]
+        # CHECK:                ctc1    $4, $ra                 # encoding: [0x44,0xc4,0xf8,0x00]
+
+        trunc.w.d	$f4,$f6,$4
+        # CHECK:                cfc1  $4, $ra                   # encoding: [0x44,0x44,0xf8,0x00]
+        # CHECK:                cfc1    $4, $ra                 # encoding: [0x44,0x44,0xf8,0x00]
+        # CHECK:                nop                             # encoding: [0x00,0x00,0x00,0x00]
+        # CHECK:                ori     $1, $4, 3               # encoding: [0x34,0x81,0x00,0x03]
+        # CHECK:                xori    $1, $1, 2               # encoding: [0x38,0x21,0x00,0x02]
+        # CHECK:                ctc1    $1, $ra                 # encoding: [0x44,0xc1,0xf8,0x00]
+        # CHECK:                nop                             # encoding: [0x00,0x00,0x00,0x00]
+        # CHECK:                cvt.w.d $f4, $f6                # encoding: [0x46,0x20,0x31,0x24]
+        # CHECK:                ctc1    $4, $ra                 # encoding: [0x44,0xc4,0xf8,0x00]
+        # CHECK:                nop                             # encoding: [0x00,0x00,0x00,0x00]    
+
 1:
Index: test/MC/Mips/mips2/valid.s
===================================================================
--- test/MC/Mips/mips2/valid.s
+++ test/MC/Mips/mips2/valid.s
@@ -167,8 +167,10 @@
         tne       $6,$17               # CHECK: tne $6, $17            # encoding: [0x00,0xd1,0x00,0x36]
         tne       $7,$8,885            # CHECK: tne $7, $8, 885        # encoding: [0x00,0xe8,0xdd,0x76]
         tnei      $12,-29647
-        trunc.w.d $f22,$f15
-        trunc.w.s $f28,$f30
+        trunc.w.d $f22,$f15            # CHECK: trunc.w.d $f22, $f14   # encoding: [0x46,0x20,0x75,0x8d] 
+        trunc.w.s $f28,$f30            # CHECK: trunc.w.s $f28, $f30   # encoding: [0x46,0x00,0xf7,0x0d]
+        trunc.w.d $f4,$f6,$4           # CHECK: trunc.w.d $f4, $f6     # encoding: [0x46,0x20,0x31,0x0d]
+        trunc.w.s $f4,$f6,$4           # CHECK: trunc.w.s $f4, $f6     # encoding: [0x46,0x00,0x31,0x0d]
         xor       $s2,$a0,$s8
         xor       $2, 4                # CHECK: xori $2, $2, 4         # encoding: [0x38,0x42,0x00,0x04]
 
Index: test/MC/Mips/mips3/valid.s
===================================================================
--- test/MC/Mips/mips3/valid.s
+++ test/MC/Mips/mips3/valid.s
@@ -231,10 +231,12 @@
         tne       $6,$17               # CHECK: tne $6, $17            # encoding: [0x00,0xd1,0x00,0x36]
         tne       $7,$8,885            # CHECK: tne $7, $8, 885        # encoding: [0x00,0xe8,0xdd,0x76]
         tnei      $12,-29647
-        trunc.l.d $f23,$f23
-        trunc.l.s $f28,$f31
-        trunc.w.d $f22,$f15
-        trunc.w.s $f28,$f30
+        trunc.l.d $f23,$f23            # CHECK: trunc.l.d $f23, $f23    # encoding: [0x46,0x20,0xbd,0xc9] 
+        trunc.l.s $f28,$f31            # CHECK: trunc.l.s $f28, $f31    # encoding: [0x46,0x00,0xff,0x09]
+        trunc.w.d $f22,$f15            # CHECK: trunc.w.d $f22, $f15    # encoding: [0x46,0x20,0x7d,0x8d] 
+        trunc.w.s $f28,$f30            # CHECK: trunc.w.s $f28, $f30    # encoding: [0x46,0x00,0xf7,0x0d]
+        trunc.w.d $f4,$f6,$4           # CHECK: trunc.w.d $f4, $f6     # encoding: [0x46,0x20,0x31,0x0d]
+        trunc.w.s $f4,$f6,$4           # CHECK: trunc.w.s $f4, $f6     # encoding: [0x46,0x00,0x31,0x0d]
         xor       $s2,$a0,$s8
         xor       $2, 4                # CHECK: xori $2, $2, 4         # encoding: [0x38,0x42,0x00,0x04]
 
Index: test/MC/Mips/mips32/valid.s
===================================================================
--- test/MC/Mips/mips32/valid.s
+++ test/MC/Mips/mips32/valid.s
@@ -197,8 +197,10 @@
         tne       $6,$17               # CHECK: tne $6, $17            # encoding: [0x00,0xd1,0x00,0x36]
         tne       $7,$8,885            # CHECK: tne $7, $8, 885        # encoding: [0x00,0xe8,0xdd,0x76]
         tnei      $12,-29647
-        trunc.w.d $f22,$f15
-        trunc.w.s $f28,$f30
+        trunc.w.d $f22,$f15            # CHECK: trunc.w.d $f22, $f14   # encoding: [0x46,0x20,0x75,0x8d] 
+        trunc.w.s $f28,$f30            # CHECK: trunc.w.s $f28, $f30   # encoding: [0x46,0x00,0xf7,0x0d]
+        trunc.w.d $f4,$f6,$4           # CHECK: trunc.w.d $f4, $f6     # encoding: [0x46,0x20,0x31,0x0d]
+        trunc.w.s $f4,$f6,$4           # CHECK: trunc.w.s $f4, $f6     # encoding: [0x46,0x00,0x31,0x0d]
         xor       $s2,$a0,$s8
         xor       $2, 4                # CHECK: xori $2, $2, 4         # encoding: [0x38,0x42,0x00,0x04]
 
Index: test/MC/Mips/mips32r2/valid.s
===================================================================
--- test/MC/Mips/mips32r2/valid.s
+++ test/MC/Mips/mips32r2/valid.s
@@ -234,8 +234,10 @@
         tne       $6,$17               # CHECK: tne $6, $17            # encoding: [0x00,0xd1,0x00,0x36]
         tne       $7,$8,885            # CHECK: tne $7, $8, 885        # encoding: [0x00,0xe8,0xdd,0x76]
         tnei      $12,-29647
-        trunc.w.d $f22,$f15
-        trunc.w.s $f28,$f30
+        trunc.w.d $f22,$f15            # CHECK: trunc.w.d $f22, $f14   # encoding: [0x46,0x20,0x75,0x8d] 
+        trunc.w.s $f28,$f30            # CHECK: trunc.w.s $f28, $f30   # encoding: [0x46,0x00,0xf7,0x0d]
+        trunc.w.d $f4,$f6,$4           # CHECK: trunc.w.d $f4, $f6     # encoding: [0x46,0x20,0x31,0x0d]
+        trunc.w.s $f4,$f6,$4           # CHECK: trunc.w.s $f4, $f6     # encoding: [0x46,0x00,0x31,0x0d]
         wsbh      $k1,$9
         xor       $s2,$a0,$s8
         xor       $2, 4                # CHECK: xori $2, $2, 4         # encoding: [0x38,0x42,0x00,0x04]
Index: test/MC/Mips/mips32r3/valid.s
===================================================================
--- test/MC/Mips/mips32r3/valid.s
+++ test/MC/Mips/mips32r3/valid.s
@@ -234,8 +234,10 @@
         tne       $6,$17               # CHECK: tne $6, $17            # encoding: [0x00,0xd1,0x00,0x36]
         tne       $7,$8,885            # CHECK: tne $7, $8, 885        # encoding: [0x00,0xe8,0xdd,0x76]
         tnei      $12,-29647
-        trunc.w.d $f22,$f15
-        trunc.w.s $f28,$f30
+        trunc.w.d $f22,$f15            # CHECK: trunc.w.d $f22, $f14   # encoding: [0x46,0x20,0x75,0x8d] 
+        trunc.w.s $f28,$f30            # CHECK: trunc.w.s $f28, $f30   # encoding: [0x46,0x00,0xf7,0x0d]
+        trunc.w.d $f4,$f6,$4           # CHECK: trunc.w.d $f4, $f6     # encoding: [0x46,0x20,0x31,0x0d]
+        trunc.w.s $f4,$f6,$4           # CHECK: trunc.w.s $f4, $f6     # encoding: [0x46,0x00,0x31,0x0d]
         wsbh      $k1,$9
         xor       $s2,$a0,$s8
         xor       $2, 4                # CHECK: xori $2, $2, 4         # encoding: [0x38,0x42,0x00,0x04]
Index: test/MC/Mips/mips32r5/valid.s
===================================================================
--- test/MC/Mips/mips32r5/valid.s
+++ test/MC/Mips/mips32r5/valid.s
@@ -235,8 +235,10 @@
         tne       $6,$17               # CHECK: tne $6, $17            # encoding: [0x00,0xd1,0x00,0x36]
         tne       $7,$8,885            # CHECK: tne $7, $8, 885        # encoding: [0x00,0xe8,0xdd,0x76]
         tnei      $12,-29647
-        trunc.w.d $f22,$f15
-        trunc.w.s $f28,$f30
+        trunc.w.d $f22,$f15            # CHECK: trunc.w.d $f22, $f14   # encoding: [0x46,0x20,0x75,0x8d] 
+        trunc.w.s $f28,$f30            # CHECK: trunc.w.s $f28, $f30   # encoding: [0x46,0x00,0xf7,0x0d]
+        trunc.w.d $f4,$f6,$4           # CHECK: trunc.w.d $f4, $f6     # encoding: [0x46,0x20,0x31,0x0d]
+        trunc.w.s $f4,$f6,$4           # CHECK: trunc.w.s $f4, $f6     # encoding: [0x46,0x00,0x31,0x0d]
         wsbh      $k1,$9
         xor       $s2,$a0,$s8
         xor       $2, 4                # CHECK: xori $2, $2, 4         # encoding: [0x38,0x42,0x00,0x04]
Index: test/MC/Mips/mips4/valid.s
===================================================================
--- test/MC/Mips/mips4/valid.s
+++ test/MC/Mips/mips4/valid.s
@@ -260,10 +260,12 @@
         tne       $6,$17               # CHECK: tne $6, $17            # encoding: [0x00,0xd1,0x00,0x36]
         tne       $7,$8,885            # CHECK: tne $7, $8, 885        # encoding: [0x00,0xe8,0xdd,0x76]
         tnei      $12,-29647
-        trunc.l.d $f23,$f23
-        trunc.l.s $f28,$f31
-        trunc.w.d $f22,$f15
-        trunc.w.s $f28,$f30
+        trunc.l.d $f23,$f23            # CHECK: trunc.l.d $f23, $f23    # encoding: [0x46,0x20,0xbd,0xc9] 
+        trunc.l.s $f28,$f31            # CHECK: trunc.l.s $f28, $f31    # encoding: [0x46,0x00,0xff,0x09]
+        trunc.w.d $f22,$f15            # CHECK: trunc.w.d $f22, $f15    # encoding: [0x46,0x20,0x7d,0x8d] 
+        trunc.w.s $f28,$f30            # CHECK: trunc.w.s $f28, $f30    # encoding: [0x46,0x00,0xf7,0x0d]
+        trunc.w.d $f4,$f6,$4           # CHECK: trunc.w.d $f4, $f6     # encoding: [0x46,0x20,0x31,0x0d]
+        trunc.w.s $f4,$f6,$4           # CHECK: trunc.w.s $f4, $f6     # encoding: [0x46,0x00,0x31,0x0d]
         xor       $s2,$a0,$s8
         xor       $2, 4                # CHECK: xori $2, $2, 4         # encoding: [0x38,0x42,0x00,0x04]
 
Index: test/MC/Mips/mips5/valid.s
===================================================================
--- test/MC/Mips/mips5/valid.s
+++ test/MC/Mips/mips5/valid.s
@@ -262,10 +262,12 @@
         tne       $6,$17               # CHECK: tne $6, $17            # encoding: [0x00,0xd1,0x00,0x36]
         tne       $7,$8,885            # CHECK: tne $7, $8, 885        # encoding: [0x00,0xe8,0xdd,0x76]
         tnei      $12,-29647
-        trunc.l.d $f23,$f23
-        trunc.l.s $f28,$f31
-        trunc.w.d $f22,$f15
-        trunc.w.s $f28,$f30
+         trunc.l.d $f23,$f23           # CHECK: trunc.l.d $f23, $f23   # encoding: [0x46,0x20,0xbd,0xc9] 
+        trunc.l.s $f28,$f31            # CHECK: trunc.l.s $f28, $f31   # encoding: [0x46,0x00,0xff,0x09]
+        trunc.w.d $f22,$f15            # CHECK: trunc.w.d $f22, $f15   # encoding: [0x46,0x20,0x7d,0x8d] 
+        trunc.w.s $f28,$f30            # CHECK: trunc.w.s $f28, $f30   # encoding: [0x46,0x00,0xf7,0x0d]
+        trunc.w.d $f4,$f6,$4           # CHECK: trunc.w.d $f4, $f6     # encoding: [0x46,0x20,0x31,0x0d]
+        trunc.w.s $f4,$f6,$4           # CHECK: trunc.w.s $f4, $f6     # encoding: [0x46,0x00,0x31,0x0d]
         xor       $s2,$a0,$s8
         xor       $2, 4                # CHECK: xori $2, $2, 4         # encoding: [0x38,0x42,0x00,0x04]
 
Index: test/MC/Mips/mips64/valid.s
===================================================================
--- test/MC/Mips/mips64/valid.s
+++ test/MC/Mips/mips64/valid.s
@@ -281,10 +281,12 @@
         tne       $6,$17               # CHECK: tne $6, $17            # encoding: [0x00,0xd1,0x00,0x36]
         tne       $7,$8,885            # CHECK: tne $7, $8, 885        # encoding: [0x00,0xe8,0xdd,0x76]
         tnei      $12,-29647
-        trunc.l.d $f23,$f23
-        trunc.l.s $f28,$f31
-        trunc.w.d $f22,$f15
-        trunc.w.s $f28,$f30
+        trunc.l.d $f23,$f23            # CHECK: trunc.l.d $f23, $f23    # encoding: [0x46,0x20,0xbd,0xc9] 
+        trunc.l.s $f28,$f31            # CHECK: trunc.l.s $f28, $f31    # encoding: [0x46,0x00,0xff,0x09]
+        trunc.w.d $f22,$f15            # CHECK: trunc.w.d $f22, $f15    # encoding: [0x46,0x20,0x7d,0x8d] 
+        trunc.w.s $f28,$f30            # CHECK: trunc.w.s $f28, $f30    # encoding: [0x46,0x00,0xf7,0x0d]
+        trunc.w.d $f4,$f6,$4           # CHECK: trunc.w.d $f4, $f6     # encoding: [0x46,0x20,0x31,0x0d]
+        trunc.w.s $f4,$f6,$4           # CHECK: trunc.w.s $f4, $f6     # encoding: [0x46,0x00,0x31,0x0d]
         xor       $s2,$a0,$s8
         xor       $2, 4                # CHECK: xori $2, $2, 4         # encoding: [0x38,0x42,0x00,0x04]
 
Index: test/MC/Mips/mips64r2/valid.s
===================================================================
--- test/MC/Mips/mips64r2/valid.s
+++ test/MC/Mips/mips64r2/valid.s
@@ -307,10 +307,12 @@
         tne       $6,$17               # CHECK: tne $6, $17            # encoding: [0x00,0xd1,0x00,0x36]
         tne       $7,$8,885            # CHECK: tne $7, $8, 885        # encoding: [0x00,0xe8,0xdd,0x76]
         tnei      $12,-29647
-        trunc.l.d $f23,$f23
-        trunc.l.s $f28,$f31
-        trunc.w.d $f22,$f15
-        trunc.w.s $f28,$f30
+        trunc.l.d $f23,$f23            # CHECK: trunc.l.d $f23, $f23    # encoding: [0x46,0x20,0xbd,0xc9] 
+        trunc.l.s $f28,$f31            # CHECK: trunc.l.s $f28, $f31    # encoding: [0x46,0x00,0xff,0x09]
+        trunc.w.d $f22,$f15            # CHECK: trunc.w.d $f22, $f15    # encoding: [0x46,0x20,0x7d,0x8d] 
+        trunc.w.s $f28,$f30            # CHECK: trunc.w.s $f28, $f30    # encoding: [0x46,0x00,0xf7,0x0d]
+        trunc.w.d $f4,$f6,$4           # CHECK: trunc.w.d $f4, $f6     # encoding: [0x46,0x20,0x31,0x0d]
+        trunc.w.s $f4,$f6,$4           # CHECK: trunc.w.s $f4, $f6     # encoding: [0x46,0x00,0x31,0x0d]
         xor       $s2,$a0,$s8
         xor       $2, 4                # CHECK: xori $2, $2, 4         # encoding: [0x38,0x42,0x00,0x04]
         wsbh      $k1,$9
Index: test/MC/Mips/mips64r3/valid.s
===================================================================
--- test/MC/Mips/mips64r3/valid.s
+++ test/MC/Mips/mips64r3/valid.s
@@ -307,10 +307,12 @@
         tne       $6,$17               # CHECK: tne $6, $17            # encoding: [0x00,0xd1,0x00,0x36]
         tne       $7,$8,885            # CHECK: tne $7, $8, 885        # encoding: [0x00,0xe8,0xdd,0x76]
         tnei      $12,-29647
-        trunc.l.d $f23,$f23
-        trunc.l.s $f28,$f31
-        trunc.w.d $f22,$f15
-        trunc.w.s $f28,$f30
+        trunc.l.d $f23,$f23            # CHECK: trunc.l.d $f23, $f23    # encoding: [0x46,0x20,0xbd,0xc9] 
+        trunc.l.s $f28,$f31            # CHECK: trunc.l.s $f28, $f31    # encoding: [0x46,0x00,0xff,0x09]
+        trunc.w.d $f22,$f15            # CHECK: trunc.w.d $f22, $f15    # encoding: [0x46,0x20,0x7d,0x8d] 
+        trunc.w.s $f28,$f30            # CHECK: trunc.w.s $f28, $f30    # encoding: [0x46,0x00,0xf7,0x0d]
+        trunc.w.d $f4,$f6,$4           # CHECK: trunc.w.d $f4, $f6     # encoding: [0x46,0x20,0x31,0x0d]
+        trunc.w.s $f4,$f6,$4           # CHECK: trunc.w.s $f4, $f6     # encoding: [0x46,0x00,0x31,0x0d]
         xor       $s2,$a0,$s8
         xor       $2, 4                # CHECK: xori $2, $2, 4         # encoding: [0x38,0x42,0x00,0x04]
         wsbh      $k1,$9
Index: test/MC/Mips/mips64r5/valid.s
===================================================================
--- test/MC/Mips/mips64r5/valid.s
+++ test/MC/Mips/mips64r5/valid.s
@@ -308,10 +308,12 @@
         tne       $6,$17               # CHECK: tne $6, $17            # encoding: [0x00,0xd1,0x00,0x36]
         tne       $7,$8,885            # CHECK: tne $7, $8, 885        # encoding: [0x00,0xe8,0xdd,0x76]
         tnei      $12,-29647
-        trunc.l.d $f23,$f23
-        trunc.l.s $f28,$f31
-        trunc.w.d $f22,$f15
-        trunc.w.s $f28,$f30
+        trunc.l.d $f23,$f23            # CHECK: trunc.l.d $f23, $f23    # encoding: [0x46,0x20,0xbd,0xc9] 
+        trunc.l.s $f28,$f31            # CHECK: trunc.l.s $f28, $f31    # encoding: [0x46,0x00,0xff,0x09]
+        trunc.w.d $f22,$f15            # CHECK: trunc.w.d $f22, $f15    # encoding: [0x46,0x20,0x7d,0x8d] 
+        trunc.w.s $f28,$f30            # CHECK: trunc.w.s $f28, $f30    # encoding: [0x46,0x00,0xf7,0x0d]
+        trunc.w.d $f4,$f6,$4           # CHECK: trunc.w.d $f4, $f6     # encoding: [0x46,0x20,0x31,0x0d]
+        trunc.w.s $f4,$f6,$4           # CHECK: trunc.w.s $f4, $f6     # encoding: [0x46,0x00,0x31,0x0d]
         xor       $s2,$a0,$s8
         xor       $2, 4                # CHECK: xori $2, $2, 4         # encoding: [0x38,0x42,0x00,0x04]
         wsbh      $k1,$9