diff --git a/src/compiler/turboshaft/assembler.h b/src/compiler/turboshaft/assembler.h
index 37dfbf9ac6..3d5a9cf37e 100644
--- a/src/compiler/turboshaft/assembler.h
+++ b/src/compiler/turboshaft/assembler.h
@@ -367,6 +367,18 @@ class AssemblerInterface : public Superclass {
                         WordRepresentation::Word32())
   DECL_SINGLE_REP_UNARY(Word64PopCount, WordUnary, PopCount,
                         WordRepresentation::Word64())
+  DECL_MULTI_REP_UNARY(WordSignExtend8, WordUnary, WordRepresentation,
+                       SignExtend8)
+  DECL_SINGLE_REP_UNARY(Word32SignExtend8, WordUnary, SignExtend8,
+                        WordRepresentation::Word32())
+  DECL_SINGLE_REP_UNARY(Word64SignExtend8, WordUnary, SignExtend8,
+                        WordRepresentation::Word64())
+  DECL_MULTI_REP_UNARY(WordSignExtend16, WordUnary, WordRepresentation,
+                       SignExtend16)
+  DECL_SINGLE_REP_UNARY(Word32SignExtend16, WordUnary, SignExtend16,
+                        WordRepresentation::Word32())
+  DECL_SINGLE_REP_UNARY(Word64SignExtend16, WordUnary, SignExtend16,
+                        WordRepresentation::Word64())
 #undef DECL_SINGLE_REP_UNARY
 #undef DECL_MULTI_REP_UNARY
 
diff --git a/src/compiler/turboshaft/graph-builder.cc b/src/compiler/turboshaft/graph-builder.cc
index e1d84b1d87..0355ccbe90 100644
--- a/src/compiler/turboshaft/graph-builder.cc
+++ b/src/compiler/turboshaft/graph-builder.cc
@@ -436,6 +436,10 @@ OpIndex GraphBuilder::Process(
       UNARY_CASE(Word64Ctz, Word64CountTrailingZeros)
       UNARY_CASE(Word32Popcnt, Word32PopCount)
       UNARY_CASE(Word64Popcnt, Word64PopCount)
+      UNARY_CASE(SignExtendWord8ToInt32, Word32SignExtend8)
+      UNARY_CASE(SignExtendWord16ToInt32, Word32SignExtend16)
+      UNARY_CASE(SignExtendWord8ToInt64, Word64SignExtend8)
+      UNARY_CASE(SignExtendWord16ToInt64, Word64SignExtend16)
 
       UNARY_CASE(Float32Abs, Float32Abs)
       UNARY_CASE(Float64Abs, Float64Abs)
@@ -505,6 +509,19 @@ OpIndex GraphBuilder::Process(
       CHANGE_CASE(ChangeFloat64ToUint32, UnsignedNarrowing, Float64, Word32)
       CHANGE_CASE(ChangeFloat64ToInt64, SignedNarrowing, Float64, Word64)
       CHANGE_CASE(ChangeFloat64ToUint64, UnsignedNarrowing, Float64, Word64)
+
+      CHANGE_CASE(TryTruncateFloat64ToUint64, UnsignedFloatTruncateSat, Float64,
+                  Word64)
+      CHANGE_CASE(TryTruncateFloat64ToUint32, UnsignedFloatTruncateSat, Float64,
+                  Word32)
+      CHANGE_CASE(TryTruncateFloat32ToUint64, UnsignedFloatTruncateSat, Float32,
+                  Word64)
+      CHANGE_CASE(TryTruncateFloat64ToInt64, SignedFloatTruncateSat, Float64,
+                  Word64)
+      CHANGE_CASE(TryTruncateFloat64ToInt32, SignedFloatTruncateSat, Float64,
+                  Word32)
+      CHANGE_CASE(TryTruncateFloat32ToInt64, SignedFloatTruncateSat, Float32,
+                  Word64)
       CHANGE_CASE(Float64ExtractLowWord32, ExtractLowHalf, Float64, Word32)
       CHANGE_CASE(Float64ExtractHighWord32, ExtractHighHalf, Float64, Word32)
 #undef CHANGE_CASE
@@ -541,6 +558,11 @@ OpIndex GraphBuilder::Process(
                               RegisterRepresentation::Float64(),
                               RegisterRepresentation::Word64());
     }
+    case IrOpcode::kTruncateFloat64ToUint32: {
+      return assembler.Change(
+          Map(node->InputAt(0)), ChangeOp::Kind::kUnsignedFloatTruncate,
+          RegisterRepresentation::Float64(), RegisterRepresentation::Word32());
+    }
     case IrOpcode::kFloat64InsertLowWord32:
       return assembler.Float64InsertWord32(
           Map(node->InputAt(0)), Map(node->InputAt(1)),
diff --git a/src/compiler/turboshaft/operations.cc b/src/compiler/turboshaft/operations.cc
index 5565b5009c..5bd78a4b8d 100644
--- a/src/compiler/turboshaft/operations.cc
+++ b/src/compiler/turboshaft/operations.cc
@@ -51,6 +51,10 @@ std::ostream& operator<<(std::ostream& os, WordUnaryOp::Kind kind) {
       return os << "CountTrailingZeros";
     case WordUnaryOp::Kind::kPopCount:
       return os << "PopCount";
+    case WordUnaryOp::Kind::kSignExtend8:
+      return os << "SignExtend8";
+    case WordUnaryOp::Kind::kSignExtend16:
+      return os << "SignExtend16";
   }
 }
 
@@ -150,6 +154,8 @@ bool WordUnaryOp::IsSupported(Kind kind, WordRepresentation rep) {
   switch (kind) {
     case Kind::kCountLeadingZeros:
     case Kind::kReverseBytes:
+    case Kind::kSignExtend8:
+    case Kind::kSignExtend16:
       return true;
     case Kind::kCountTrailingZeros:
       return rep == WordRepresentation::Word32()
@@ -224,6 +230,10 @@ std::ostream& operator<<(std::ostream& os, ChangeOp::Kind kind) {
       return os << "SignExtend";
     case ChangeOp::Kind::kBitcast:
       return os << "Bitcast";
+    case ChangeOp::Kind::kSignedFloatTruncateSat:
+      return os << "SignedFloatTruncateSat";
+    case ChangeOp::Kind::kUnsignedFloatTruncateSat:
+      return os << "UnsignedFloatTruncateSat";
   }
 }
 
diff --git a/src/compiler/turboshaft/operations.h b/src/compiler/turboshaft/operations.h
index 76a2d1600c..cd2af5698c 100644
--- a/src/compiler/turboshaft/operations.h
+++ b/src/compiler/turboshaft/operations.h
@@ -726,6 +726,8 @@ struct WordUnaryOp : FixedArityOperationT<1, WordUnaryOp> {
     kCountLeadingZeros,
     kCountTrailingZeros,
     kPopCount,
+    kSignExtend8,
+    kSignExtend16,
   };
   Kind kind;
   WordRepresentation rep;
@@ -898,12 +900,16 @@ struct ChangeOp : FixedArityOperationT<1, ChangeOp> {
     // like kSignedFloatTruncate, but overflow guaranteed to result in the
     // minimal integer
     kSignedFloatTruncateOverflowToMin,
+    // like kSignedFloatTruncate, but saturates to min/max value if overflow
+    kSignedFloatTruncateSat,
     // conversion to unsigned integer, rounding towards zero,
     // overflow behavior system-specific
     kUnsignedFloatTruncate,
     // like kUnsignedFloatTruncate, but overflow guaranteed to result in the
     // minimal integer
     kUnsignedFloatTruncateOverflowToMin,
+    // like kUnsignedFloatTruncate, but saturates to 0/max value if overflow
+    kUnsignedFloatTruncateSat,
     // JS semantics float64 to word32 truncation
     // https://tc39.es/ecma262/#sec-touint32
     kJSFloatTruncate,
diff --git a/src/compiler/turboshaft/recreate-schedule.cc b/src/compiler/turboshaft/recreate-schedule.cc
index 54f6b56289..8d91a066d0 100644
--- a/src/compiler/turboshaft/recreate-schedule.cc
+++ b/src/compiler/turboshaft/recreate-schedule.cc
@@ -359,8 +359,6 @@ Node* ScheduleBuilder::ProcessOperation(const OverflowCheckedBinopOp& op) {
   return AddNode(o, {GetNode(op.left()), GetNode(op.right())});
 }
 Node* ScheduleBuilder::ProcessOperation(const WordUnaryOp& op) {
-  DCHECK(op.rep == WordRepresentation::Word32() ||
-         op.rep == WordRepresentation::Word64());
   bool word64 = op.rep == WordRepresentation::Word64();
   const Operator* o;
   switch (op.kind) {
@@ -376,12 +374,18 @@ Node* ScheduleBuilder::ProcessOperation(const WordUnaryOp& op) {
     case WordUnaryOp::Kind::kPopCount:
       o = word64 ? machine.Word64Popcnt().op() : machine.Word32Popcnt().op();
       break;
+    case WordUnaryOp::Kind::kSignExtend8:
+      o = word64 ? machine.SignExtendWord8ToInt64()
+                 : machine.SignExtendWord8ToInt32();
+      break;
+    case WordUnaryOp::Kind::kSignExtend16:
+      o = word64 ? machine.SignExtendWord16ToInt64()
+                 : machine.SignExtendWord16ToInt32();
+      break;
   }
   return AddNode(o, {GetNode(op.input())});
 }
 Node* ScheduleBuilder::ProcessOperation(const FloatUnaryOp& op) {
-  DCHECK(op.rep == FloatRepresentation::Float32() ||
-         op.rep == FloatRepresentation::Float64());
   bool float64 = op.rep == FloatRepresentation::Float64();
   const Operator* o;
   switch (op.kind) {
@@ -629,6 +633,9 @@ Node* ScheduleBuilder::ProcessOperation(const ChangeOp& op) {
       } else if (op.from == FloatRepresentation::Float64() &&
                  op.to == WordRepresentation::Word32()) {
         o = machine.RoundFloat64ToInt32();
+      } else if (op.from == FloatRepresentation::Float32() &&
+                 op.to == WordRepresentation::Word32()) {
+        o = machine.TruncateFloat32ToInt32(TruncateKind::kArchitectureDefault);
       } else {
         UNIMPLEMENTED();
       }
@@ -637,6 +644,9 @@ Node* ScheduleBuilder::ProcessOperation(const ChangeOp& op) {
       if (op.from == FloatRepresentation::Float64() &&
           op.to == WordRepresentation::Word64()) {
         o = machine.TruncateFloat64ToInt64(TruncateKind::kSetOverflowToMin);
+      } else if (op.from == FloatRepresentation::Float32() &&
+                 op.to == WordRepresentation::Word32()) {
+        o = machine.TruncateFloat32ToInt32(TruncateKind::kSetOverflowToMin);
       } else {
         UNIMPLEMENTED();
       }
@@ -645,6 +655,9 @@ Node* ScheduleBuilder::ProcessOperation(const ChangeOp& op) {
       if (op.from == FloatRepresentation::Float32() &&
           op.to == WordRepresentation::Word32()) {
         o = machine.TruncateFloat32ToUint32(TruncateKind::kArchitectureDefault);
+      } else if (op.from == FloatRepresentation::Float64() &&
+                 op.to == WordRepresentation::Word32()) {
+        o = machine.TruncateFloat64ToUint32();
       } else {
         UNIMPLEMENTED();
       }
@@ -776,6 +789,34 @@ Node* ScheduleBuilder::ProcessOperation(const ChangeOp& op) {
         UNIMPLEMENTED();
       }
       break;
+    case Kind::kSignedFloatTruncateSat:
+      if (op.from == FloatRepresentation::Float64() &&
+          op.to == WordRepresentation::Word64()) {
+        o = machine.TryTruncateFloat64ToInt64();
+      } else if (op.from == FloatRepresentation::Float64() &&
+                 op.to == WordRepresentation::Word32()) {
+        o = machine.TryTruncateFloat64ToInt32();
+      } else if (op.from == FloatRepresentation::Float32() &&
+                 op.to == WordRepresentation::Word64()) {
+        o = machine.TryTruncateFloat32ToInt64();
+      } else {
+        UNREACHABLE();
+      }
+      break;
+    case Kind::kUnsignedFloatTruncateSat:
+      if (op.from == FloatRepresentation::Float64() &&
+          op.to == WordRepresentation::Word64()) {
+        o = machine.TryTruncateFloat64ToUint64();
+      } else if (op.from == FloatRepresentation::Float64() &&
+                 op.to == WordRepresentation::Word32()) {
+        o = machine.TryTruncateFloat64ToUint32();
+      } else if (op.from == FloatRepresentation::Float32() &&
+                 op.to == WordRepresentation::Word64()) {
+        o = machine.TryTruncateFloat32ToUint64();
+      } else {
+        UNREACHABLE();
+      }
+      break;
   }
   return AddNode(o, {GetNode(op.input())});
 }