diff --git a/src/compiler/ia32/code-generator-ia32.cc b/src/compiler/ia32/code-generator-ia32.cc
index 75d81775b7..de76c8cd51 100644
--- a/src/compiler/ia32/code-generator-ia32.cc
+++ b/src/compiler/ia32/code-generator-ia32.cc
@@ -1768,6 +1768,40 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
                    i.InputOperand(2), i.InputInt8(1) << 4);
       break;
     }
+    case kIA32F32x4SConvertI32x4: {
+      __ Cvtdq2ps(i.OutputSimd128Register(), i.InputOperand(0));
+      break;
+    }
+    case kSSEF32x4UConvertI32x4: {
+      DCHECK_EQ(i.OutputSimd128Register(), i.InputSimd128Register(0));
+      CpuFeatureScope sse_scope(tasm(), SSE4_1);
+      XMMRegister dst = i.OutputSimd128Register();
+      __ pxor(kScratchDoubleReg, kScratchDoubleReg);      // zeros
+      __ pblendw(kScratchDoubleReg, dst, 0x55);           // get lo 16 bits
+      __ psubd(dst, kScratchDoubleReg);                   // get hi 16 bits
+      __ cvtdq2ps(kScratchDoubleReg, kScratchDoubleReg);  // convert lo exactly
+      __ psrld(dst, 1);                  // divide by 2 to get in unsigned range
+      __ cvtdq2ps(dst, dst);             // convert hi exactly
+      __ addps(dst, dst);                // double hi, exactly
+      __ addps(dst, kScratchDoubleReg);  // add hi and lo, may round.
+      break;
+    }
+    case kAVXF32x4UConvertI32x4: {
+      CpuFeatureScope avx_scope(tasm(), AVX);
+      XMMRegister dst = i.OutputSimd128Register();
+      XMMRegister src = i.InputSimd128Register(0);
+      __ vpxor(kScratchDoubleReg, kScratchDoubleReg,
+               kScratchDoubleReg);  // zeros
+      __ vpblendw(kScratchDoubleReg, kScratchDoubleReg, src,
+                  0x55);                                   // get lo 16 bits
+      __ vpsubd(dst, src, kScratchDoubleReg);              // get hi 16 bits
+      __ vcvtdq2ps(kScratchDoubleReg, kScratchDoubleReg);  // convert lo exactly
+      __ vpsrld(dst, dst, 1);    // divide by 2 to get in unsigned range
+      __ vcvtdq2ps(dst, dst);    // convert hi exactly
+      __ vaddps(dst, dst, dst);  // double hi, exactly
+      __ vaddps(dst, dst, kScratchDoubleReg);  // add hi and lo, may round.
+      break;
+    }
     case kSSEF32x4Abs: {
       XMMRegister dst = i.OutputSimd128Register();
       Operand src = i.InputOperand(0);
diff --git a/src/compiler/ia32/instruction-codes-ia32.h b/src/compiler/ia32/instruction-codes-ia32.h
index 1d75f2e255..0d84bf97df 100644
--- a/src/compiler/ia32/instruction-codes-ia32.h
+++ b/src/compiler/ia32/instruction-codes-ia32.h
@@ -121,6 +121,9 @@ namespace compiler {
   V(AVXF32x4ExtractLane)           \
   V(SSEF32x4ReplaceLane)           \
   V(AVXF32x4ReplaceLane)           \
+  V(IA32F32x4SConvertI32x4)        \
+  V(SSEF32x4UConvertI32x4)         \
+  V(AVXF32x4UConvertI32x4)         \
   V(SSEF32x4Abs)                   \
   V(AVXF32x4Abs)                   \
   V(SSEF32x4Neg)                   \
diff --git a/src/compiler/ia32/instruction-scheduler-ia32.cc b/src/compiler/ia32/instruction-scheduler-ia32.cc
index e586872a8a..291f3c1d3e 100644
--- a/src/compiler/ia32/instruction-scheduler-ia32.cc
+++ b/src/compiler/ia32/instruction-scheduler-ia32.cc
@@ -103,6 +103,9 @@ int InstructionScheduler::GetTargetInstructionFlags(
     case kAVXF32x4ExtractLane:
     case kSSEF32x4ReplaceLane:
     case kAVXF32x4ReplaceLane:
+    case kIA32F32x4SConvertI32x4:
+    case kSSEF32x4UConvertI32x4:
+    case kAVXF32x4UConvertI32x4:
     case kSSEF32x4Abs:
     case kAVXF32x4Abs:
     case kSSEF32x4Neg:
diff --git a/src/compiler/ia32/instruction-selector-ia32.cc b/src/compiler/ia32/instruction-selector-ia32.cc
index 5e16325222..103d14f68d 100644
--- a/src/compiler/ia32/instruction-selector-ia32.cc
+++ b/src/compiler/ia32/instruction-selector-ia32.cc
@@ -1793,6 +1793,7 @@ VISIT_ATOMIC_BINOP(Xor)
   V(S128Xor)
 
 #define SIMD_INT_UNOP_LIST(V) \
+  V(F32x4SConvertI32x4)       \
   V(I32x4Neg)                 \
   V(I16x8Neg)                 \
   V(I8x16Neg)
@@ -1832,6 +1833,16 @@ void InstructionSelector::VisitF32x4ExtractLane(Node* node) {
   }
 }
 
+void InstructionSelector::VisitF32x4UConvertI32x4(Node* node) {
+  IA32OperandGenerator g(this);
+  InstructionOperand operand0 = g.UseRegister(node->InputAt(0));
+  if (IsSupported(AVX)) {
+    Emit(kAVXF32x4UConvertI32x4, g.DefineAsRegister(node), operand0);
+  } else {
+    Emit(kSSEF32x4UConvertI32x4, g.DefineSameAsFirst(node), operand0);
+  }
+}
+
 #define SIMD_I8X16_SHIFT_OPCODES(V) \
   V(I8x16Shl)                       \
   V(I8x16ShrS)                      \
diff --git a/src/compiler/instruction-selector.cc b/src/compiler/instruction-selector.cc
index 0617b0ab0a..188118b74b 100644
--- a/src/compiler/instruction-selector.cc
+++ b/src/compiler/instruction-selector.cc
@@ -2306,7 +2306,7 @@ void InstructionSelector::VisitWord32PairSar(Node* node) { UNIMPLEMENTED(); }
 #endif  // V8_TARGET_ARCH_64_BIT
 
 #if !V8_TARGET_ARCH_ARM && !V8_TARGET_ARCH_ARM64 && !V8_TARGET_ARCH_MIPS && \
-    !V8_TARGET_ARCH_MIPS64
+    !V8_TARGET_ARCH_MIPS64 && !V8_TARGET_ARCH_IA32
 void InstructionSelector::VisitF32x4SConvertI32x4(Node* node) {
   UNIMPLEMENTED();
 }
@@ -2315,7 +2315,7 @@ void InstructionSelector::VisitF32x4UConvertI32x4(Node* node) {
   UNIMPLEMENTED();
 }
 #endif  // !V8_TARGET_ARCH_ARM && !V8_TARGET_ARCH_ARM64 && !V8_TARGET_ARCH_MIPS
-        // && !V8_TARGET_ARCH_MIPS64
+        // && !V8_TARGET_ARCH_MIPS64 && !V8_TARGET_ARCH_IA32
 
 #if !V8_TARGET_ARCH_X64
 void InstructionSelector::VisitWord64AtomicLoad(Node* node) { UNIMPLEMENTED(); }
diff --git a/src/ia32/assembler-ia32.cc b/src/ia32/assembler-ia32.cc
index 2875d36b01..8277b4bd4b 100644
--- a/src/ia32/assembler-ia32.cc
+++ b/src/ia32/assembler-ia32.cc
@@ -2725,6 +2725,17 @@ void Assembler::pshufd(XMMRegister dst, Operand src, uint8_t shuffle) {
   EMIT(shuffle);
 }
 
+void Assembler::pblendw(XMMRegister dst, Operand src, uint8_t mask) {
+  DCHECK(IsEnabled(SSE4_1));
+  EnsureSpace ensure_space(this);
+  EMIT(0x66);
+  EMIT(0x0F);
+  EMIT(0x3A);
+  EMIT(0x0E);
+  emit_sse_operand(dst, src);
+  EMIT(mask);
+}
+
 void Assembler::pextrb(Operand dst, XMMRegister src, int8_t offset) {
   DCHECK(IsEnabled(SSE4_1));
   EnsureSpace ensure_space(this);
@@ -2959,6 +2970,12 @@ void Assembler::vpshufd(XMMRegister dst, Operand src, uint8_t shuffle) {
   EMIT(shuffle);
 }
 
+void Assembler::vpblendw(XMMRegister dst, XMMRegister src1, Operand src2,
+                         uint8_t mask) {
+  vinstr(0x0E, dst, src1, src2, k66, k0F3A, kWIG);
+  EMIT(mask);
+}
+
 void Assembler::vpextrb(Operand dst, XMMRegister src, int8_t offset) {
   vinstr(0x14, src, xmm0, dst, k66, k0F3A, kWIG);
   EMIT(offset);
diff --git a/src/ia32/assembler-ia32.h b/src/ia32/assembler-ia32.h
index 5635710c15..78bcec73a4 100644
--- a/src/ia32/assembler-ia32.h
+++ b/src/ia32/assembler-ia32.h
@@ -1131,6 +1131,11 @@ class Assembler : public AssemblerBase {
   }
   void pshufd(XMMRegister dst, Operand src, uint8_t shuffle);
 
+  void pblendw(XMMRegister dst, XMMRegister src, uint8_t mask) {
+    pblendw(dst, Operand(src), mask);
+  }
+  void pblendw(XMMRegister dst, Operand src, uint8_t mask);
+
   void pextrb(Register dst, XMMRegister src, int8_t offset) {
     pextrb(Operand(dst), src, offset);
   }
@@ -1439,6 +1444,12 @@ class Assembler : public AssemblerBase {
   }
   void vpshufd(XMMRegister dst, Operand src, uint8_t shuffle);
 
+  void vpblendw(XMMRegister dst, XMMRegister src1, XMMRegister src2,
+                uint8_t mask) {
+    vpblendw(dst, src1, Operand(src2), mask);
+  }
+  void vpblendw(XMMRegister dst, XMMRegister src1, Operand src2, uint8_t mask);
+
   void vpextrb(Register dst, XMMRegister src, int8_t offset) {
     vpextrb(Operand(dst), src, offset);
   }
diff --git a/src/ia32/disasm-ia32.cc b/src/ia32/disasm-ia32.cc
index a9bac07690..5f07f0803d 100644
--- a/src/ia32/disasm-ia32.cc
+++ b/src/ia32/disasm-ia32.cc
@@ -819,6 +819,13 @@ int DisassemblerIA32::AVXInstruction(byte* data) {
     int mod, regop, rm, vvvv = vex_vreg();
     get_modrm(*current, &mod, &regop, &rm);
     switch (opcode) {
+      case 0x0E:
+        AppendToBuffer("vpblendw %s,%s,", NameOfXMMRegister(regop),
+                       NameOfXMMRegister(vvvv));
+        current += PrintRightXMMOperand(current);
+        AppendToBuffer(",%d", *reinterpret_cast<uint8_t*>(current));
+        current++;
+        break;
       case 0x14:
         AppendToBuffer("vpextrb ");
         current += PrintRightOperand(current);
@@ -1961,6 +1968,14 @@ int DisassemblerIA32::InstructionDecode(v8::internal::Vector<char> out_buffer,
                              NameOfXMMRegister(rm),
                              static_cast<int>(imm8));
               data += 2;
+            } else if (*data == 0x0E) {
+              data++;
+              int mod, regop, rm;
+              get_modrm(*data, &mod, &regop, &rm);
+              AppendToBuffer("pblendw %s,", NameOfXMMRegister(regop));
+              data += PrintRightXMMOperand(data);
+              AppendToBuffer(",%d", *reinterpret_cast<uint8_t*>(data));
+              data++;
             } else if (*data == 0x14) {
               data++;
               int mod, regop, rm;
diff --git a/src/ia32/macro-assembler-ia32.h b/src/ia32/macro-assembler-ia32.h
index d3ebc3e5d5..2cb55323bf 100644
--- a/src/ia32/macro-assembler-ia32.h
+++ b/src/ia32/macro-assembler-ia32.h
@@ -228,6 +228,7 @@ class TurboAssembler : public Assembler {
   AVX_OP2_WITH_TYPE(Movd, movd, XMMRegister, Operand)
   AVX_OP2_WITH_TYPE(Movd, movd, Register, XMMRegister)
   AVX_OP2_WITH_TYPE(Movd, movd, Operand, XMMRegister)
+  AVX_OP2_WITH_TYPE(Cvtdq2ps, cvtdq2ps, XMMRegister, Operand)
 
 #undef AVX_OP2_WITH_TYPE
 
diff --git a/test/cctest/test-disasm-ia32.cc b/test/cctest/test-disasm-ia32.cc
index ccc106cc32..b5b6130729 100644
--- a/test/cctest/test-disasm-ia32.cc
+++ b/test/cctest/test-disasm-ia32.cc
@@ -573,6 +573,8 @@ TEST(DisasmIa320) {
   {
     if (CpuFeatures::IsSupported(SSE4_1)) {
       CpuFeatureScope scope(&assm, SSE4_1);
+      __ pblendw(xmm5, xmm1, 5);
+      __ pblendw(xmm5, Operand(edx, 4), 5);
       __ pextrb(eax, xmm0, 1);
       __ pextrb(Operand(edx, 4), xmm0, 1);
       __ pextrw(eax, xmm0, 1);
@@ -689,6 +691,8 @@ TEST(DisasmIa320) {
       __ vpshuflw(xmm5, Operand(edx, 4), 5);
       __ vpshufd(xmm5, xmm1, 5);
       __ vpshufd(xmm5, Operand(edx, 4), 5);
+      __ vpblendw(xmm5, xmm1, xmm0, 5);
+      __ vpblendw(xmm5, xmm1, Operand(edx, 4), 5);
       __ vpextrb(eax, xmm0, 1);
       __ vpextrb(Operand(edx, 4), xmm0, 1);
       __ vpextrw(eax, xmm0, 1);
diff --git a/test/cctest/wasm/test-run-wasm-simd.cc b/test/cctest/wasm/test-run-wasm-simd.cc
index ba5785e9d8..aa6ee5e2cc 100644
--- a/test/cctest/wasm/test-run-wasm-simd.cc
+++ b/test/cctest/wasm/test-run-wasm-simd.cc
@@ -446,7 +446,7 @@ WASM_SIMD_TEST(F32x4ReplaceLane) {
 }
 
 #if V8_TARGET_ARCH_ARM || V8_TARGET_ARCH_ARM64 || V8_TARGET_ARCH_MIPS || \
-    V8_TARGET_ARCH_MIPS64
+    V8_TARGET_ARCH_MIPS64 || V8_TARGET_ARCH_IA32
 // Tests both signed and unsigned conversion.
 WASM_SIMD_TEST(F32x4ConvertI32x4) {
   WasmRunner<int32_t, int32_t, float, float> r(kExecuteTurbofan, lower_simd);
@@ -471,7 +471,7 @@ WASM_SIMD_TEST(F32x4ConvertI32x4) {
   }
 }
 #endif  // V8_TARGET_ARCH_ARM || V8_TARGET_ARCH_ARM64 || V8_TARGET_ARCH_MIPS ||
-        // V8_TARGET_ARCH_MIPS64
+        // V8_TARGET_ARCH_MIPS64 || V8_TARGET_ARCH_IA32
 
 void RunF32x4UnOpTest(LowerSimd lower_simd, WasmOpcode simd_op,
                       FloatUnOp expected_op, float error = 0.0f) {